test for pruning

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jdart
Posts: 4366
Joined: Fri Mar 10, 2006 5:23 am
Location: http://www.arasanchess.org

test for pruning

Post by jdart »

I have been looking recently at this position from an offline game:

[d]4r3/5pk1/1q1r1p1p/1p1Pn2Q/1Pp4P/6P1/5PB1/R3R1K1 b - -

Black played f5! and won. Arasan did not anticipate this move. It looks like excessive pruning is making it "blind" in this position. I have recently pushed a fix that scales back razoring and that does allow it to solve this. .. f5 offers the pawn, but if White takes, then .. Rf6 is strong. Black is better, but several quiet moves may be needed to demonstrate the advantage.

--Jon
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Terje
Posts: 347
Joined: Tue Nov 19, 2019 4:34 am
Location: https://github.com/TerjeKir/weiss
Full name: Terje Kirstihagen

Re: test for pruning

Post by Terje »

Weiss finds f5 qxf5 rf6 in ~1 minute, going from slightly preferring white to slightly preferring black.

Ethereal finds f5 in 16ms, though preferring Qe2/d1 as the followup, and giving about +1 for black :)
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Dann Corbit
Posts: 12537
Joined: Wed Mar 08, 2006 8:57 pm
Location: Redmond, WA USA

Re: test for pruning

Post by Dann Corbit »

I guess that f5 only draws with optimal play. I base that conjecture solely on Stockfish's complete inability to make progress:

Code: Select all

Searching: 4r3/5pk1/1q1r1p1p/1p1Pn2Q/1Pp4P/6P1/5PB1/R3R1K1 b - - 0 1
infinite: 0 time: 0 increment: 0 moves to go: 0

 1   -0.25   00:00  370931  Rdd8 Qf5 
 2   +0.18   00:00  872774  Rdd8 Be4 
 3   +0.55   00:00   1398K  Qd4 Rad1 Qc3 Kf1 
 4   +0.08   00:00   1855K  Qd4 Qf5 Rh8 Red1 
 5   +0.59   00:00   2544K  Qd4 Qf5 Qd2 Be4 Kf8 
 6   +0.10   00:00   3021K  Qd4 Qf5 Rxd5 Be4 Rh8 Bxd5 
 7   -0.15   00:00   3685K  Qd4 Qf5 Qb2 f4 Ng6 Rxe8 Qxa1+ Kh2 Qb2 
 8   -0.08   00:00   4245K  Qd4 Qf5 Qb2 Be4 Rh8 h5 Qxb4 
 9   +0.50   00:00   4844K  f5 Re3 Qd4 Rd1 Qg4 Qxg4+ fxg4 
10   +0.39   00:00   5557K  f5 Qxf5 Rf6 Qc2 Nf3+ Bxf3 Rxe1+ Rxe1 Rxf3 Kf1 Qd4 
11   +0.76   00:00   6265K  f5 Qxf5 Rf6 Qc2 Qd4 Be4 Nf3+ Bxf3 Rxe1+ Rxe1 Rxf3 Kf1 c3 
12   +1.04   00:00   7088K  f5 Rad1 Rf6 Re3 Ng4 Rf3 c3 Rxf5 Rg6 Rf1 c2 d6 Qxd6 Rxb5 Qd2 
13   +1.03   00:00   7697K  f5 Rad1 Rf6 Bh3 Nd3 Rxe8 Qxf2+ Kh1 Qxg3 Rxd3 Qxd3 Bg2 c3 Qe2 Qb1+ Kh2 c2 Qe5 
14   +0.41   00:00   8406K  f5 Rad1 Rf6 Bh3 Nd3 Rxe8 Qxf2+ Kh1 Qxg3 Rxd3 cxd3 Bxf5 Rxf5 Qxf5 d2 Qh5 Qe1+ Rxe1 dxe1=Q+ Kg2 Qxb4 Qe5+ Kh7 Kg3 
15   +0.48   00:00   8952K  f5 Rad1 Rf6 Bh3 Nd3 Rxe8 Qxf2+ Kh1 Qxg3 Rxd3 cxd3 Bxf5 Rxf5 Qxf5 d2 Qh5 Qe1+ Rxe1 dxe1=Q+ Kg2 Qd2+ Kh3 Qc3+ Kg2 
16   +0.37   00:00  10162K  f5 Rad1 Rf6 Bh3 Nd3 Rxe8 Qxf2+ Kh1 Qxg3 Rxd3 cxd3 Bxf5 d2 Qg4+ Qxg4 Bxg4 d1=B Bxd1 Rf1+ Kg2 Rxd1 Rd8 Rd4 d6 Kf6 Rb8 Ke6 Rxb5 
17   +0.59   00:00  16270K  f5 Rad1 Rf6 Qe2 f4 Qh5 Qd6 gxf4 Rxf4 Re3 Re7 Qe2 Rxh4 Re1 f6 Qd2 Kf7 Kf1 h5 R3e2 Rg4 Qh6 c3 Qxh5+ Kg7 
18   +0.65   00:00  18047K  f5 Rad1 Rf6 Qe2 f4 Qh5 Qd6 gxf4 Rxf4 Re3 Re7 Qe2 Rxh4 Re1 f6 Qd2 Rg4 Kf1 Kf8 Ra1 Re8 Rae1 f5 
19   +1.20   00:00  21793K  f5 Qd1 Rg6 Ra3 f4 Qa1 c3 Rxe5 Rxe5 Qxc3 Qf6 Qd2 fxg3 fxg3 Re8 Kh2 Qe5 Qd1 Qb2 Qa1 Re2 Qxb2+ Rxb2 Kh3 Rxb4 
20   +1.06   00:00  24059K  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxh4 Qxb5 Qxf4 Qc5 Rd6 Kf1 Qe5 Qd4 Qxd4 Rxd4 Rb8 Ke2 Kf6 Ke3 Re8+ Kf3 
21   +1.23   00:00  30158K  f5 Qxf5 Rf6 Qc2 Qd4 Red1 Nd3 Ra2 h5 d6 Qxd6 Qc3 Qe5 Rxd3 cxd3 Qxd3 Rd6 Qf1 Rc8 Qe2 Qxe2 Rxe2 Rd1+ Kh2 Kf6 Bf3 
22   +1.24   00:00  42998K  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Qg4 Qd3 Qxb4 Qg3+ Kh8 h5 f6 Qg6 Qf4 Qg3 Qf5 Qg6 Qxg6 hxg6 Kg7 d6 Kxg6 
23   +1.35   00:00  55874K  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Qg4 Qd3 Qxb4 Qd4+ Qxd4 Rxd4 Rd6 Kh2 Ra8 Kg3 Ra3+ Kf4 Rf6+ Ke5 Rxf2 Be4 Ra5 Bd3 Rh2 Kf5 Rh1 Ke5 Rha1 Bc4 h5 Rf4 Re1+ Re4 
24   +1.38   00:00  67298K  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Qg4 Qd3 Qxb4 Qd4+ Qxd4 Rxd4 Rd6 Be4 Kf6 f4 Ke7 Rb4 Ra6 Kf2 Kd6 Rc4 Rg8 Bf3 f5 Rc2 Rg7 Ke3 Rc7 Rxc7 Kxc7 Kd4 Ra1 Kc5 
25   +1.19   00:01  92075K  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxh4 Qg3+ Qxg3 fxg3 Re3 d6 Rxg3 d7 Kf6 Kf2 Rb3 Rd4 h5 Bf1 h4 Kg2 Ke6 Bxb5 Rg3+ Kh2 f5 
26   +1.35   00:01 105894K  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxh4 Qg3+ Qxg3 fxg3 Re3 Kh2 Rd6 Kh3 Kf6 Bf1 Ke7 Bxb5 Rg6 d6+ Rxd6 Rxd6 Kxd6 Bc4 Ke7 b5 Rc3 Be2 Rc2 Bf1 Rf2 Bc4 
27   +1.43   00:02 171337K  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Qxh4 Qc5 Re6 Qc3+ Rf6 Qg3+ Qxg3 fxg3 Rb6 Rd4 Rdb8 d6 Rxb4 Rd2 Rb1+ Bf1 Kf6 d7 Ke7 Kf2 Rc1 Bh3 Rg8 
28   +1.43   00:02 184249K  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Qxh4 Qc5 Re6 Qc3+ Rf6 Qg3+ Qxg3 fxg3 Rb6 Bf1 Kf6 b5 Rdd6 Kf2 Ke5 Re1+ Kxd5 Rd1+ Ke6 Re1+ Kf6 Kf3 Re6 Rc1 Ke5 Bc4 Rf6+ Ke3 Rg6 Bxf7 Rxg3+ Kf2 Rg4 
29   +1.39   00:02 223389K  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Qxh4 Qc5 Re6 Qc3+ Rf6 Qg3+ Qxg3 fxg3 Rb6 b5 Rxb5 d6 Rb3 Kh2 Rb6 d7 Kf6 Bh3 Rb2+ Kg1 Re2 Bg4 Re4 Bh3 Ke7 Kf2 Rc4 Ke3 Rg8 Kd3 Ra4 Kc2 h5 
30   +0.67   00:05 387888K  f5 Qxf5 Rf6 Qc2 Qd4 Rad1 Nf3+ Bxf3 Rxe1+ Rxe1 Rxf3 Kf1 Qxd5 Qe2 Qf5 Qe5+ Qf6 Qc5 Rxg3 Qxb5 Rf3 Re2 Rf4 h5 Kh7 Qc5 Qa1+ Re1 Qa8 Re3 Qh1+ Ke2 Qc1 Rg3 Qb1 Rh3 Qb2+ Kf1 Qc2 Rg3 Qb1+ Ke2 Qc1 Qe3 Qc2+ Kf1 Rh4 Kg2 Qd1 Rh3 Qxh5 Rxh4 Qxh4 Kf1 Qg4 Qc3 Qd1+ Kg2 
31   +0.62   00:05 461790K  f5 Qxf5 Rf6 Qc2 Qd4 Rad1 Nf3+ Bxf3 Rxe1+ Rxe1 Rxf3 Kf1 Qxd5 Qe2 Qf5 Qe5+ Qf6 Qc5 Rxg3 Qxb5 Rf3 Re2 Rf4 h5 Kh7 Qc5 Qa1+ Re1 Qa8 Re3 Qh1+ Ke2 Qc1 Rg3 Qb1 Rh3 Qc2+ Kf1 Qd1+ Kg2 Qe2 Qe3 Rg4+ Kh2 Qd1 Rg3 Rh4+ Rh3 Rxh5 Rxh5 Qxh5+ Kg2 Qd5+ f3 Qc6 Qc3 
32   +0.64   00:06 495697K  f5 Qxf5 Rf6 Qc2 Qd4 Rad1 Nf3+ Bxf3 Rxe1+ Rxe1 Rxf3 Kf1 Qxd5 Qe2 Qf5 Qe5+ Qf6 Qc5 Rxg3 Qxb5 Rf3 Re2 Rf4 h5 Kh7 Qc5 Qa1+ Re1 Qb2 Qe3 Qf6 b5 Qf5 b6 c3 b7 Qb5+ Qe2 Qxb7 Qd3+ f5 Qxc3 Qh1+ Ke2 Re4+ Kd1 Rxe1+ Qxe1 Qxh5+ Kd2 Qg5+ Qe3 Kg6 f4 Qg2+ Kc3 Qe4 Qg3+ Kf7 Kd2 Kf6 Qh4+ Kg7 Qg3+ Kh7 Qf2 Qa4 Ke2 
33   +1.34   00:07 562718K  f5 Qxf5 Rf6 Qc2 Qd4 Rab1 Nf3+ Bxf3 Rxe1+ Rxe1 Rxf3 Kf1 Qxd5 Qe2 Qf5 Qe5+ Qf6 Qc5 Rxg3 Qxb5 Rf3 Re2 Rf4 Qc5 Kh7 h5 Qa1+ Re1 Qb2 Qe3 Qf6 b5 Qf5 b6 c3 b7 Qb5+ Qe2 Qxb7 Qd3+ f5 Qxc3 Qh1+ Ke2 Re4+ Kd1 Rxe1+ Qxe1 Qxh5+ Kd2 Qg5+ Qe3 Kg6 f4 
34   +0.58   00:12   1036M  f5 Qxf5 Rf6 Qc2 Qd4 Rad1 Nf3+ Bxf3 Rxe1+ Rxe1 Rxf3 Kf1 Qxd5 Qe2 Rf5 Qb2+ Kh7 Kg1 Rf3 Qe5 Rd3 Qxd5 Rxd5 Kf1 Kg7 Ra1 Kf6 Ke2 Ke5 f3 Rd3 Ra5 Kd4 Rxb5 Re3+ Kd1 Rxf3 Rb7 f5 Rd7+ Ke3 Kc2 Rxg3 Re7+ Kd4 Rd7+ Ke5 Rc7 Kd5 Rf7 Ke4 Rc7 f4 Rxc4+ Ke3 
35   +0.56   00:16   1330M  f5 Qxf5 Rf6 Qc2 Qd4 Rab1 Nf3+ Bxf3 Rxe1+ Rxe1 Rxf3 Kf1 Qxd5 Qe2 Qf5 Qe5+ Qf6 Qc5 Rxg3 Qxb5 Rf3 Re2 Rf4 h5 Kh7 Qc5 Qa1+ Re1 Qa8 Re3 Qh1+ Ke2 Qc1 Rg3 Qb1 Rh3 Qe4+ Qe3 Qc2+ Kf1 Qf5 Kg1 Rg4+ Rg3 Qxh5 Kg2 Rxg3+ fxg3 Qb5 Qc3 Kg6 Kf2 h5 Ke3 Qb6+ Kd2 Qd6+ Kc1 Qc6 Qc2+ Kg7 Qc3+ f6 Kb2 Qb5 Qd2 h4 gxh4 Qe5+ Kc2 
36   +0.35   00:19   1573M  f5 Qxf5 Rf6 Qc2 Qd4 Rad1 Nf3+ Bxf3 Rxe1+ Rxe1 Rxf3 Kf1 Qxd5 Qe2 Qf5 Qe5+ Qf6 Qc5 Rxg3 Qxb5 Rf3 Re2 Rf4 h5 Kh7 Qc5 Qa1+ Re1 Qa8 Re3 Qh1+ Ke2 Qc1 Rg3 Qa1 Rh3 Qa2+ Kf1 Qb1+ Ke2 Qc2+ Kf1 Qd1+ Kg2 Qe1 Rg3 Qe4+ f3 Qe2+ Qf2 Qxf2+ Kxf2 c3 Ke3 Rxb4 Kd3 Rh4 Kxc3 Rxh5 Kd4 Rg5 Rh3 Kg6 Ke3 Rg2 Rh1 
37   +0.46   00:20   1632M  f5 Qxf5 Rf6 Qc2 Qd4 Rab1 Nf3+ Bxf3 Rxe1+ Rxe1 Rxf3 Kf1 Qxd5 Qe2 Rf5 Qe4 Qxe4 Rxe4 Rd5 Ke2 Kf6 g4 c3 Re3 Rd2+ Ke1 Rd4 Rxc3 Rxg4 Rc6+ Kg7 Rc5 Rxb4 Ke2 Rb2+ Ke3 b4 Rb5 b3 h5 Kf6 Kf3 Rb1 Kf4 Ke6 Ke4 Kd6 Kd3 f6 Kc3 Ke6 Kd3 
38   +0.64   00:22   1853M  f5 Qxf5 Rf6 Qc2 Qd4 Rab1 Nf3+ Bxf3 Rxe1+ Rxe1 Rxf3 Kf1 Qxd5 Qe2 Rf5 Qe4 Qxe4 Rxe4 Kf6 Rd4 Ke6 Rd8 Rd5 Rc8 Ke5 Ke2 Rd6 Re8+ Re6 Rc8 Ra6 Kd2 f6 Rb8 Kd4 Rd8+ Ke4 Kc2 Ra2+ Kc3 Ra3+ Kc2 Rf3 Re8+ Kd5 Rd8+ Ke6 Rb8 Rxf2+ Kc3 Rf3+ Kc2 Rf5 g4 Rd5 Rh8 Rd4 Rb8 Rxg4 Rxb5 f5 Rb6+ Ke5 Rxh6 Rg2+ Kd1 f4 b5 Rb2 Rc6 
39   +0.58   00:25   2070M  f5 Qxf5 Rf6 Qc2 Qd4 Rad1 Nf3+ Bxf3 Rxe1+ Rxe1 Rxf3 Kf1 Qxd5 Qe2 Rf5 Qe4 Kf6 f4 h5 Qe3 Kg6 Kf2 Qd7 Qe4 Kf6 Re2 Kg7 Qe7 Qd1 Qe3 Rd5 Qc3+ Kg6 Qh8 Qd4+ Qxd4 Rxd4 Re5 c3 Rg5+ Kf6 Ke2 Rxb4 Rxh5 Rb2+ Kd3 b4 Rc5 Ke6 h5 Kd6 Rc8 Kd5 Rd8+ Ke6 Rc8 Kf5 Kc4 c2 
40   +0.40   00:30   2480M  f5 Qxf5 Rf6 Qc2 Qd4 Rab1 Nf3+ Bxf3 Rxe1+ Rxe1 Rxf3 Kf1 Qxd5 Qe2 Rf5 Qe4 Kf6 f4 h5 Qe3 Qh1+ Kf2 Qh2+ Kf3 Rd5 Rd1 Qh3 Qc3+ Ke7 Rxd5 Qh1+ Kf2 Qxd5 Qh8 Qd2+ Kf1 Qd1+ Kf2 Qd5 Qg7 Ke6 Qh8 Qd2+ Kf3 Qd1+ Ke3 Qg1+ Kf3 Kd7 Qg7 Qf1+ Ke3 Qd3+ Kf2 Qd2+ Kf3 Qd5+ Ke3 Kd6 Qg8 Kc7 Qg7 Kd7 Qg5 Kc6 Qg8 Qd3+ Kf2 Qd2+ Kf3 Qd7 Qh8 Kb7 Qc3 Qd6 Kf2 Kc7 Qg7 Qd2+ Kf3 Qd3+ Kf2 
41   +0.43   00:34   2886M  f5 Qxf5 Rf6 Qc2 Qd4 Rac1 Nf3+ Bxf3 Rxe1+ Rxe1 Rxf3 Kf1 Qxd5 Qe2 Qf5 Qe5+ Qf6 Qc5 Rxg3 Qxb5 Rf3 Re2 Rf4 h5 Kh7 Qc5 Qa1+ Re1 Qa8 Re3 Qh1+ Ke2 Qc1 Rg3 Qb1 Rh3 Qe4+ Qe3 Qc2+ Kf1 Qf5 Kg1 Rg4+ Rg3 Qxh5 Kg2 Rxg3+ fxg3 Qb5 Qc3 Kg6 Kf2 Kf5 Qd2 Ke4 Qe2+ Kd5 Qh5+ Kc6 Qxf7 Qb6+ Ke2 Qd4 Qe8+ Kb6 Qb8+ Ka6 Qf4 Qb2+ Kf3 Qb3+ Kf2 Kb5 
42   +0.31   00:44   3666M  f5 Qxf5 Rf6 Qc2 Qd4 Rad1 Nf3+ Bxf3 Rxe1+ Rxe1 Rxf3 Kf1 Qxd5 Qe2 Rf5 Qe4 Kf6 f4 h5 Qe3 Qh1+ Kf2 Qh2+ Kf3 Rd5 Rd1 Qh3 Qc3+ Ke7 Qe3+ Kf8 Rxd5 Qh1+ Kf2 Qxd5 Qc3 Ke7 Qg7 Ke6 Qh8 Qd2+ Kf3 Qd1+ Ke3 Qg1+ Kf3 Kd7 Qg7 Qf1+ Ke3 Qe1+ Kf3 Ke6 Qh8 Ke7 Qg7 Qf1+ Ke3 Qd3+ Kf2 Qd5 Qh8 Qd2+ Kf1 Qd1+ Kf2 f6 Qc8 Qd2+ Kf3 Qxb4 Qb7+ Kd6 Qb8+ Ke7 Qc7+ Ke8 
43   +1.59   01:22   6553M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Qxh4 Qc5 Re6 Qc3+ Rf6 Qg3+ Qxg3 fxg3 Rb6 Rb1 Rdb8 Rd1 Rd6 Rb1 Kf6 b5 Rdb6 Bf1 Rd8 Rd1 Rdd6 Kf2 Ke5 Re1+ Kxd5 Rd1+ Ke6 Rc1 Ke7 Rc5 Rf6+ Kg1 Rbd6 Bc4 Kd8 Kg2 Kd7 Bd5 Ke7 Bc4 Rd2+ Kh3 
44   +1.71   01:46   8331M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Rd3 Rxf1+ Bxf1 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd6 Rd3+ Ke7 Re3+ Kf8 Rg3 Qe4 Bh5 f6 Rh3 f5 Kf1 Kg7 Be2 Qc6 Rg3+ Kf6 Rh3 Ke5 Bd3 Qc1+ Kg2 Qg5+ Rg3 
45   +1.72   02:13  10291M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qe4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke7 Kg2 Qe4+ Bf3 Qe5 Rh3 Qg5+ Rg3 Qd2 Bh5 Qd5+ Bf3 Qd6 Rh3 Qd2 Rh5 Qf4 Rh3 f5 Rg3 Kf6 Be2 Qe4+ Bf3 Qe5 Kg1 Ke7 Bh5 Qc5 Kg2 f4 Rh3 Qe5 
46   +1.73   02:25  11206M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qe4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke7 Kg2 Qe4+ Bf3 Qe5 Rh3 Qg5+ Rg3 Qd2 Bh5 f6 Re3+ Kd6 Bf3 f5 Be2 Kc5 Kf1 Kd4 Kg2 Qb2 Rd3+ Ke5 Kf1 Qc1+ Kg2 Qc6+ Kg1 Ke6 Rh3 Ke7 Bf3 
47   +1.73   02:34  11862M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qb4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke7 Kg2 Qe4+ Bf3 Qe5 Rh3 f5 Bh5 Qd5+ Bf3 Qd2 Kf1 Kd6 Be2 Ke5 Re3+ Kd4 Kg2 Qa2 Rd3+ Ke5 Bh5 Qa8+ Kg1 Qg8+ Rg3 Qc4 Re3+ Kf6 Rg3 
48   +1.73   02:35  11960M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qb4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd6 Rd3+ Kc5 Rc3+ Kb4 Rg3 f5 Kg2 Qe4+ Bf3 Qe5 Bh5 Kc4 Re3 Qg7+ Kf1 Qb2 Kg2 Qb7+ Bf3 Qg7+ Kf1 Qb2 Bh5 Qb1+ Kg2 Kd4 Be2 Qa2 Kf1 Qb2 Rh3 Qc1+ Kg2 Qc6+ Kg1 Qc2 Kf1 Ke5 
49   +1.73   02:40  12328M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qb4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd6 Rd3+ Kc5 Rc3+ Kb4 Rg3 f5 Kg2 Qe4+ Bf3 Qe5 Bh5 Kc5 Kf1 Qe4 Bf3 Qc4+ Be2 Qh4 Kg2 Qe4+ Bf3 Qe5 Bh5 Kd4 Rh3 Qg7+ Kf1 Qg5 Be2 Qc1+ Kg2 Qd2 
50   +1.73   02:45  12629M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qb4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd6 Rd3+ Kc5 Rc3+ Kb4 Rg3 f5 Kg2 Qe4+ Bf3 Qe5 Bh5 Kc5 Kf1 Qb2 Kg2 Qb7+ Kg1 Qd5 Bf3 Qd2 Rh3 Kd6 Kg2 Ke6 Kf1 Ke7 Bh5 Qd5 Bf3 Qc5 Kg2 
51   +1.73   02:49  12945M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qb4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd6 Rd3+ Kc5 Rc3+ Kb4 Rg3 f5 Kg2 Qe4+ Bf3 Qe5 Bh5 Kc5 Kf1 Qb2 Kg2 Qb7+ Kg1 Qd5 Bf3 Qd2 Rh3 Kd6 Kg2 Ke6 Kf1 Ke7 Bh5 Qd5 Bf3 Qc5 Kg2 Qd4 Rh5 
52   +1.73   02:55  13365M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qb4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd6 Rd3+ Kc5 Rc3+ Kb4 Rg3 f5 Kg2 Qe4+ Bf3 Qe5 Bh5 Kc5 Kf1 Qb2 Kg2 Qb7+ Kg1 Qd5 Bf3 Qd2 Rh3 Kd6 Kg2 Ke7 Rg3 Ke6 Rg6+ Ke5 Bh5 Qf4 Bf3 Kd4 
53   +1.73   03:25  15540M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qb4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd6 Rd3+ Kc5 Rc3+ Kb4 Rg3 f5 Kg2 Qe4+ Bf3 Qe5 Bh5 Kc5 Kf1 Qa1+ Kg2 Kd4 Rf3 Qa8 Kf1 Qa6+ Kg1 Qa2 Rh3 Ke5 Kg2 Qd5+ Bf3 Qd2 Rh5 Kf6 Rh3 Ke6 Kf1 Ke7 Kg2 
54   +1.73   03:45  17115M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qb4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd6 Rd3+ Kc5 Rc3+ Kb4 Rg3 f5 Kg2 Qe4+ Bf3 Qe5 Bh5 Kc5 Kf1 Qa1+ Kg2 Kd4 Rf3 Qa8 Kf1 Qa6+ Kg1 Qa2 Rh3 Ke5 Kg2 Qd5+ Bf3 Qd2 Rh5 Ke6 Rh3 Kf6 Rh5 Qf4 Rh3 Ke7 Bh5 
55   +1.73   03:58  18180M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qe4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd6 Rd3+ Kc5 Rc3+ Kb4 Rg3 f5 Kg2 Qe4+ Bf3 Qe5 Bh5 Kc5 Rh3 Kd4 Kf1 Qe4 Be2 Qc2 Rh4+ Kd5 Rh5 Ke5 Rh3 Qd2 Bf3 Qc1+ Kg2 Qg5+ Kf1 Kd4 Be2 Qd2 Rh4+ Kd5 Rh3 Qc1+ Kg2 Ke6 Bd3 Qg5+ Kh2 Kd6 
56   +1.73   04:29  20599M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qe4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd5 Rd3+ Kc5 Rc3+ Kb4 Rg3 f5 Kg2 Qe4+ Bf3 Qe5 Bh5 Kc5 Rh3 Kd4 Kf1 Qe4 Be2 Qb1+ Kg2 Qa2 Bf3 Qd2 Kf1 Ke5 Be2 Qc1+ Kg2 Qc6+ Bf3 Qg6+ Rg3 Qf6 Rh3 Qg5+ Rg3 Qc1 Rh3 Qd2 
57   +1.73   04:39  21369M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qe4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd5 Rd3+ Kc5 Rc3+ Kb4 Rg3 f5 Re3 Qg5+ Rg3 Qd2 Kf1 Kc5 Rh3 Kd4 Bf3 Ke5 Be2 Qc1+ Kg2 Qc6+ Kg1 Qc2 Kf1 Qd2 Re3+ Kf6 Rh3 Kg7 Rh5 Qc2 Rh3 Qb1+ Kg2 Qe4+ Bf3 Qd4 Bh5 Qc4 Rg3+ Kf8 Rf3 
58   +1.73   05:11  23823M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qe4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd5 Rd3+ Kc5 Rc3+ Kb4 Rg3 f5 Re3 Qg5+ Rg3 Qd2 Kf1 Kc5 Rh3 Kd4 Bf3 Ke5 Be2 Qc1+ Kg2 Qc6+ Kg1 Qc2 Kf1 Qd2 Re3+ Kf6 Rh3 Kf7 Bh5+ Ke7 Be2 Qc2 Re3+ Kf7 Rh3 Qc1+ Kg2 Qc6+ Bf3 Qe6 Kf1 Kg7 Be2 Qd5 
59   +1.73   05:23  24787M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qe4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd5 Rd3+ Kc5 Rc3+ Kb4 Rg3 f5 Re3 Qg5+ Rg3 Qd2 Bh5 Kc4 Kg2 Kc5 Rh3 Kd6 Bf3 Ke7 Kf1 Qb2 Kg2 Qg7+ Rg3 Qd4 Bh5 Qh4 Bf3 Kf7 Be2 Qe4+ Bf3 Qc2 Bh5+ Kf6 Rg6+ Ke5 Rxh6 Qc7 Kg3 
60   +1.73   06:40  30861M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qe4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd5 Rd3+ Kc5 Rc3+ Kb4 Rg3 f5 Re3 Qg5+ Rg3 Qd2 Kf1 Qc1+ Kg2 Qc6+ Bf3 Qc2 Rh3 Qd2 Bh5 Kc5 Rg3 Qd5+ Bf3 Qe5 Rh3 Qg7+ Kf1 Qa1+ Kg2 Qa6 Rh5 Kd4 Rh3 Ke5 Rh4 Qe6 Be2 Qa2 Bf3 Qd2 Rh5 Ke6 Kh1 
61   +1.73   07:09  33166M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qe4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd5 Rd3+ Kc5 Rc3+ Kb4 Rg3 Qd8 Bh5 f6 Kg2 Qa5 Rh3 Qg5+ Kf1 Qf5 Kg2 Kc4 Bf3 Qg6+ Rg3 Qd3 Rg4+ Kc3 Re4 Qb1 Re3+ Kd4 Be2 Qf5 Rh3 Qe4+ Kf1 Qb1+ Kg2 Qf5 Bh5 Qd5+ Kf1 Qd7 Kg2 Qb7+ Bf3 Qg7+ Kf1 Qg5 Bh5 Qc1+ Kg2 Qd2 Rh4+ Ke5 
62   +1.73   08:12  38149M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qe4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd5 Rd3+ Kc5 Rc3+ Kb4 Rg3 Qd8 Bh5 f6 Kg2 Qa5 Rh3 Qg5+ Kf1 Qf5 Kg2 Kc4 Bf3 Qg6+ Rg3 Qd3 Rg4+ Kc3 Re4 Qb1 Re3+ Kd4 Be2 Qc2 Kf1 Qc1+ Kg2 Qc6+ Bf3 Qc2 Be2 Kd5 Bd3 Qd2 Be4+ Kd4 Bg6 Qc1 Rd3+ Kc5 Re3 Kc4 Bh5 
63   +1.73   08:54  41475M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qe4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd5 Rd3+ Ke6 Re3+ Kd7 Rd3+ Ke7 Re3+ Kf8 Rg3 Qe4 Bh5 Qb1+ Kg2 f6 Be2 Ke7 Rh3 Qe4+ Bf3 Qe5 Rh5 Qf4 Rh3 Qg5+ Rg3 Qd2 Rh3 Kd6 Rh5 Qf4 Rd5+ Ke7 Rh5 Kf7 Rh3 Qg5+ Rg3 Qf5 Rg4 Qe5 Rh4 f5 Rh3 Qd4 
64   +1.73   09:17  43273M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qe4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd5 Rd3+ Ke6 Re3+ Kd7 Rd3+ Ke7 Re3+ Kf8 Rg3 Qe4 Bh5 Qb1+ Kg2 f6 Be2 Ke7 Rh3 Qe4+ Bf3 Qe5 Rh5 Qf4 Rh3 Qg5+ Rg3 Qe5 Rg7+ Kd8 Rg4 Kc7 Rg7+ Kb6 Rg4 Kc5 Rh4 f5 Rh3 Kb4 Bh5 Qd4 Be2 Qg7+ Kf1 Qe5 Bd3 f4 
65   +1.73   11:33  54081M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qe4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd5 Rd3+ Ke6 Re3+ Kd7 Rd3+ Ke7 Re3+ Kf8 Rg3 Qe4 Bh5 Qb1+ Kg2 f6 Be2 Ke7 Rh3 Qe4+ Bf3 Qe5 Rh5 Qf4 Rh3 Qg5+ Rg3 Qe5 Rg7+ Kd6 Rg4 Qc5 Kg3 Ke6 Re4+ Kf7 Kg2 Qg5+ Rg4 Qf5 Rb4 Ke7 Rg4 Qc5 Rh4 Qg5+ Rg4 Qd2 
66   +1.73   11:35  54241M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qe4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd5 Rd3+ Ke6 Re3+ Kd7 Rd3+ Ke7 Re3+ Kf8 Rg3 Qf4 Rh3 Ke7 Bh5 Qc1+ Kg2 Qg5+ Kf1 f6 Be2 Qc1+ Kg2 Kf8 Bg4 Qf4 Bf3 Qg5+ Rg3 Qc1 Rg4 Kf7 Rh4 Qd2 Rh3 Qg5+ Kf1 Qc1+ Kg2 Qd2 Rg3 Ke7 Rh3 f5 Kf1 Qd3+ Kg2 Qd4 Bh5 Kf6 
67   +1.73   12:09  56915M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qe4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd5 Rd3+ Ke6 Re3+ Kd7 Rd3+ Ke7 Re3+ Kf8 Rg3 Qf4 Rh3 Ke7 Bh5 Qc1+ Kg2 Qg5+ Kf1 f6 Be2 Qc1+ Kg2 Kf8 Bg4 Qf4 Bf3 Qg5+ Rg3 Qc1 Rg4 Kf7 Rh4 Qd2 Rh3 Qg5+ Kf1 Qc1+ Kg2 Qd2 Rg3 Ke7 Rh3 Kd6 Rh5 Qf4 Be2 Ke7 Bf3 Ke6 
68   +1.73   13:17  62319M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qe4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd5 Rd3+ Ke6 Re3+ Kd7 Rd3+ Ke7 Re3+ Kf8 Rg3 Qe4 Bh5 Qe1+ Kg2 f6 Re3 Qb4 Re8+ Kg7 Re3 Qc5 Rh3 Qd5+ Bf3 Qd2 Rh5 Qf4 Rh3 Kf8 Rg3 Qd6 Rh3 Qd2 Kf1 Ke7 Be2 Qg5 Re3+ Kf8 Rg3 Qc1+ Kg2 Qd2 Bf3 Kf7 Rh3 Qc1 Be2 Ke7 Bf3 Kd6 Rh5
Taking ideas is not a vice, it is a virtue. We have another word for this. It is called learning.
But sharing ideas is an even greater virtue. We have another word for this. It is called teaching.
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Dann Corbit
Posts: 12537
Joined: Wed Mar 08, 2006 8:57 pm
Location: Redmond, WA USA

Re: test for pruning

Post by Dann Corbit »

A few more plies

Code: Select all

69   +1.73   16:12  76196M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qe4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd5 Rd3+ Ke6 Re3+ Kd7 Rd3+ Ke7 Re3+ Kf8 Rg3 Qd4 Rh3 Qf4 Kf1 f6 Kg2 Kf7 Bf3 Qg5+ Rg3 Qd2 Rg4 Kf8 Rg3 Ke7 Rh3 Qg5+ Rg3 Qc1 Bh5 Ke6 Be2 Ke5 Re3+ Kd6 Rd3+ Kc5 Rh3 Qg5+ Kf1 Kb4 Rh5 Qc1+ Kg2 Qd2 Kf1 Kb3 Rb5+ Kc3 Rc5+ Kd4 Rf5 Ke4 Bg4 Qc1+ Kg2 Kd4 Rxf6 Qg5 
70   +1.73   16:53  79418M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qe4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd5 Rd3+ Ke6 Re3+ Kd7 Rd3+ Ke7 Re3+ Kf8 Rg3 Qd4 Rh3 Qd2 Kf1 Qc1+ Kg2 Ke7 Re3+ Kd6 Bh5 f6 Bg4 Kc7 Bf3 Qc5 Re4 Kd6 Rg4 Qe5 Rh4 Qg5+ Rg4 Qd2 Rh4 Qc1 Rh5 Qf4 Rd5+ Ke7 Rh5 Ke6 Bd5+ Kd6 Bf3 Ke7 Rh3 Qc1 Rg3 Ke6 Be2 Qc2 Bg4+ Ke5 Re3+ Kf4 
71   +1.73   18:57  89402M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qe4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd5 Rd3+ Ke6 Re3+ Kd7 Rd3+ Ke7 Re3+ Kf8 Rg3 Qe4 Bh5 f6 Rh3 Qf5 Kg2 Qg5+ Kf1 Qc1+ Kg2 Qd2 Rg3 Qa5 Rh3 Ke7 Bg4 Qd5+ Kg3 Qd3+ Kg2 Qg6 Kf3 Kf8 Kf4 Qg5+ Kf3 Qd5+ Kg3 Qd6+ Kf3 Kg7 Kg2 Qf4 Rg3 Kf7 Bf3 Qe5 Rg4 Qc5 Be2 Qc6+ Bf3 Qc1 Rh4 Qg5+ Rg4 
72   +1.73   20:33  97096M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qe4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd5 Rd3+ Ke6 Re3+ Kd7 Rd3+ Ke7 Re3+ Kf8 Rg3 Qe4 Bh5 f6 Rh3 Qf5 Kg2 Qg5+ Kf1 Ke7 Be2 Qc1+ Kg2 Qf4 Kf1 Qg5 Re3+ Kf8 Rg3 Qc1+ Kg2 Qc5 Rh3 Kf7 Rh5 Qc1 Bf3 Qf4 Rh1 Kg7 Rh3 Qd2 Be4 Qd4 Rg3+ Kf7 Rg4 Qd2 Bf3 Qc1 Be4 Ke7 Bf3 Qc5 Re4+ Kd7 Bg4+ Kc7 
73   +1.73   22:53 108301M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qe4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd5 Rd3+ Ke6 Re3+ Kd7 Rd3+ Ke7 Re3+ Kf8 Rg3 Qe4 Bh5 Qe1+ Kg2 f6 Re3 Qb4 Rh3 Qe4+ Bf3 Qf5 Be2 Qg5+ Kf1 Kf7 Bh5+ Ke7 Be2 Qc1+ Kg2 Qf4 Kf1 Kd6 Rd3+ Kc7 Rc3+ Kd8 Rd3+ Ke8 Re3+ Kf8 Rh3 Kg8 Bh5 Qc1+ Kg2 Kf8 Be2 Qe1 Bg4 Kg7 Rg3 Qe5 Be6+ Kf8 Bg4 h5 Bf3 Kf7 Rh3 Qg5+ Rg3 Qh6 Rh3 
74   +1.73   24:00 113664M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qe4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd5 Rd3+ Ke6 Re3+ Kd7 Rd3+ Ke7 Re3+ Kf8 Rg3 Qe4 Bh5 Qe1+ Kg2 f6 Re3 Qb4 Rh3 Qe4+ Bf3 Qf5 Be2 Qg5+ Kf1 Kf7 Bh5+ Ke7 Be2 Qc1+ Kg2 Qf4 Kf1 Kd6 Rd3+ Kc7 Rc3+ Kd8 Rd3+ Ke8 Re3+ Kf8 Rh3 Kg8 Bh5 Qc1+ Kg2 Kf8 Be2 Qe1 Bg4 Kg7 Rg3 Qe5 Be6+ Kf8 Bg4 h5 Bf3 Kf7 Rh3 Qg5+ Rg3 Qh6 Rh3 
Nodes: 113664159150
Nodes/second: 78908784
Best move: f5
Taking ideas is not a vice, it is a virtue. We have another word for this. It is called learning.
But sharing ideas is an even greater virtue. We have another word for this. It is called teaching.
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Zenmastur
Posts: 919
Joined: Sat May 31, 2014 8:28 am

Re: test for pruning

Post by Zenmastur »

jdart wrote: ↑Sat Apr 18, 2020 2:29 am I have been looking recently at this position from an offline game:

[d]4r3/5pk1/1q1r1p1p/1p1Pn2Q/1Pp4P/6P1/5PB1/R3R1K1 b - -

Black played f5! and won. Arasan did not anticipate this move. It looks like excessive pruning is making it "blind" in this position. I have recently pushed a fix that scales back razoring and that does allow it to solve this. .. f5 offers the pawn, but if White takes, then .. Rf6 is strong. Black is better, but several quiet moves may be needed to demonstrate the advantage.

--Jon
For some reason this position struck me as totally winning for black. Not sure why. None the less, I decided it was worth a look.
Dann Corbit wrote: ↑Sat Apr 18, 2020 5:25 am I guess that f5 only draws with optimal play. I base that conjecture solely on Stockfish's complete inability to make progress:

Code: Select all

Searching: 4r3/5pk1/1q1r1p1p/1p1Pn2Q/1Pp4P/6P1/5PB1/R3R1K1 b - - 0 1
infinite: 0 time: 0 increment: 0 moves to go: 0

 1   -0.25   00:00  370931  Rdd8 Qf5 
 2   +0.18   00:00  872774  Rdd8 Be4 
 3   +0.55   00:00   1398K  Qd4 Rad1 Qc3 Kf1 
 4   +0.08   00:00   1855K  Qd4 Qf5 Rh8 Red1 
 5   +0.59   00:00   2544K  Qd4 Qf5 Qd2 Be4 Kf8 
 6   +0.10   00:00   3021K  Qd4 Qf5 Rxd5 Be4 Rh8 Bxd5 
 7   -0.15   00:00   3685K  Qd4 Qf5 Qb2 f4 Ng6 Rxe8 Qxa1+ Kh2 Qb2 
 8   -0.08   00:00   4245K  Qd4 Qf5 Qb2 Be4 Rh8 h5 Qxb4 
 9   +0.50   00:00   4844K  f5 Re3 Qd4 Rd1 Qg4 Qxg4+ fxg4 
10   +0.39   00:00   5557K  f5 Qxf5 Rf6 Qc2 Nf3+ Bxf3 Rxe1+ Rxe1 Rxf3 Kf1 Qd4 
11   +0.76   00:00   6265K  f5 Qxf5 Rf6 Qc2 Qd4 Be4 Nf3+ Bxf3 Rxe1+ Rxe1 Rxf3 Kf1 c3 
12   +1.04   00:00   7088K  f5 Rad1 Rf6 Re3 Ng4 Rf3 c3 Rxf5 Rg6 Rf1 c2 d6 Qxd6 Rxb5 Qd2 
13   +1.03   00:00   7697K  f5 Rad1 Rf6 Bh3 Nd3 Rxe8 Qxf2+ Kh1 Qxg3 Rxd3 Qxd3 Bg2 c3 Qe2 Qb1+ Kh2 c2 Qe5 
14   +0.41   00:00   8406K  f5 Rad1 Rf6 Bh3 Nd3 Rxe8 Qxf2+ Kh1 Qxg3 Rxd3 cxd3 Bxf5 Rxf5 Qxf5 d2 Qh5 Qe1+ Rxe1 dxe1=Q+ Kg2 Qxb4 Qe5+ Kh7 Kg3 
15   +0.48   00:00   8952K  f5 Rad1 Rf6 Bh3 Nd3 Rxe8 Qxf2+ Kh1 Qxg3 Rxd3 cxd3 Bxf5 Rxf5 Qxf5 d2 Qh5 Qe1+ Rxe1 dxe1=Q+ Kg2 Qd2+ Kh3 Qc3+ Kg2 
16   +0.37   00:00  10162K  f5 Rad1 Rf6 Bh3 Nd3 Rxe8 Qxf2+ Kh1 Qxg3 Rxd3 cxd3 Bxf5 d2 Qg4+ Qxg4 Bxg4 d1=B Bxd1 Rf1+ Kg2 Rxd1 Rd8 Rd4 d6 Kf6 Rb8 Ke6 Rxb5 
17   +0.59   00:00  16270K  f5 Rad1 Rf6 Qe2 f4 Qh5 Qd6 gxf4 Rxf4 Re3 Re7 Qe2 Rxh4 Re1 f6 Qd2 Kf7 Kf1 h5 R3e2 Rg4 Qh6 c3 Qxh5+ Kg7 
18   +0.65   00:00  18047K  f5 Rad1 Rf6 Qe2 f4 Qh5 Qd6 gxf4 Rxf4 Re3 Re7 Qe2 Rxh4 Re1 f6 Qd2 Rg4 Kf1 Kf8 Ra1 Re8 Rae1 f5 
19   +1.20   00:00  21793K  f5 Qd1 Rg6 Ra3 f4 Qa1 c3 Rxe5 Rxe5 Qxc3 Qf6 Qd2 fxg3 fxg3 Re8 Kh2 Qe5 Qd1 Qb2 Qa1 Re2 Qxb2+ Rxb2 Kh3 Rxb4 
20   +1.06   00:00  24059K  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxh4 Qxb5 Qxf4 Qc5 Rd6 Kf1 Qe5 Qd4 Qxd4 Rxd4 Rb8 Ke2 Kf6 Ke3 Re8+ Kf3 
21   +1.23   00:00  30158K  f5 Qxf5 Rf6 Qc2 Qd4 Red1 Nd3 Ra2 h5 d6 Qxd6 Qc3 Qe5 Rxd3 cxd3 Qxd3 Rd6 Qf1 Rc8 Qe2 Qxe2 Rxe2 Rd1+ Kh2 Kf6 Bf3 
22   +1.24   00:00  42998K  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Qg4 Qd3 Qxb4 Qg3+ Kh8 h5 f6 Qg6 Qf4 Qg3 Qf5 Qg6 Qxg6 hxg6 Kg7 d6 Kxg6 
23   +1.35   00:00  55874K  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Qg4 Qd3 Qxb4 Qd4+ Qxd4 Rxd4 Rd6 Kh2 Ra8 Kg3 Ra3+ Kf4 Rf6+ Ke5 Rxf2 Be4 Ra5 Bd3 Rh2 Kf5 Rh1 Ke5 Rha1 Bc4 h5 Rf4 Re1+ Re4 
24   +1.38   00:00  67298K  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Qg4 Qd3 Qxb4 Qd4+ Qxd4 Rxd4 Rd6 Be4 Kf6 f4 Ke7 Rb4 Ra6 Kf2 Kd6 Rc4 Rg8 Bf3 f5 Rc2 Rg7 Ke3 Rc7 Rxc7 Kxc7 Kd4 Ra1 Kc5 
25   +1.19   00:01  92075K  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxh4 Qg3+ Qxg3 fxg3 Re3 d6 Rxg3 d7 Kf6 Kf2 Rb3 Rd4 h5 Bf1 h4 Kg2 Ke6 Bxb5 Rg3+ Kh2 f5 
26   +1.35   00:01 105894K  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxh4 Qg3+ Qxg3 fxg3 Re3 Kh2 Rd6 Kh3 Kf6 Bf1 Ke7 Bxb5 Rg6 d6+ Rxd6 Rxd6 Kxd6 Bc4 Ke7 b5 Rc3 Be2 Rc2 Bf1 Rf2 Bc4 
27   +1.43   00:02 171337K  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Qxh4 Qc5 Re6 Qc3+ Rf6 Qg3+ Qxg3 fxg3 Rb6 Rd4 Rdb8 d6 Rxb4 Rd2 Rb1+ Bf1 Kf6 d7 Ke7 Kf2 Rc1 Bh3 Rg8 
28   +1.43   00:02 184249K  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Qxh4 Qc5 Re6 Qc3+ Rf6 Qg3+ Qxg3 fxg3 Rb6 Bf1 Kf6 b5 Rdd6 Kf2 Ke5 Re1+ Kxd5 Rd1+ Ke6 Re1+ Kf6 Kf3 Re6 Rc1 Ke5 Bc4 Rf6+ Ke3 Rg6 Bxf7 Rxg3+ Kf2 Rg4 
29   +1.39   00:02 223389K  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Qxh4 Qc5 Re6 Qc3+ Rf6 Qg3+ Qxg3 fxg3 Rb6 b5 Rxb5 d6 Rb3 Kh2 Rb6 d7 Kf6 Bh3 Rb2+ Kg1 Re2 Bg4 Re4 Bh3 Ke7 Kf2 Rc4 Ke3 Rg8 Kd3 Ra4 Kc2 h5 
30   +0.67   00:05 387888K  f5 Qxf5 Rf6 Qc2 Qd4 Rad1 Nf3+ Bxf3 Rxe1+ Rxe1 Rxf3 Kf1 Qxd5 Qe2 Qf5 Qe5+ Qf6 Qc5 Rxg3 Qxb5 Rf3 Re2 Rf4 h5 Kh7 Qc5 Qa1+ Re1 Qa8 Re3 Qh1+ Ke2 Qc1 Rg3 Qb1 Rh3 Qb2+ Kf1 Qc2 Rg3 Qb1+ Ke2 Qc1 Qe3 Qc2+ Kf1 Rh4 Kg2 Qd1 Rh3 Qxh5 Rxh4 Qxh4 Kf1 Qg4 Qc3 Qd1+ Kg2 
31   +0.62   00:05 461790K  f5 Qxf5 Rf6 Qc2 Qd4 Rad1 Nf3+ Bxf3 Rxe1+ Rxe1 Rxf3 Kf1 Qxd5 Qe2 Qf5 Qe5+ Qf6 Qc5 Rxg3 Qxb5 Rf3 Re2 Rf4 h5 Kh7 Qc5 Qa1+ Re1 Qa8 Re3 Qh1+ Ke2 Qc1 Rg3 Qb1 Rh3 Qc2+ Kf1 Qd1+ Kg2 Qe2 Qe3 Rg4+ Kh2 Qd1 Rg3 Rh4+ Rh3 Rxh5 Rxh5 Qxh5+ Kg2 Qd5+ f3 Qc6 Qc3 
32   +0.64   00:06 495697K  f5 Qxf5 Rf6 Qc2 Qd4 Rad1 Nf3+ Bxf3 Rxe1+ Rxe1 Rxf3 Kf1 Qxd5 Qe2 Qf5 Qe5+ Qf6 Qc5 Rxg3 Qxb5 Rf3 Re2 Rf4 h5 Kh7 Qc5 Qa1+ Re1 Qb2 Qe3 Qf6 b5 Qf5 b6 c3 b7 Qb5+ Qe2 Qxb7 Qd3+ f5 Qxc3 Qh1+ Ke2 Re4+ Kd1 Rxe1+ Qxe1 Qxh5+ Kd2 Qg5+ Qe3 Kg6 f4 Qg2+ Kc3 Qe4 Qg3+ Kf7 Kd2 Kf6 Qh4+ Kg7 Qg3+ Kh7 Qf2 Qa4 Ke2 
33   +1.34   00:07 562718K  f5 Qxf5 Rf6 Qc2 Qd4 Rab1 Nf3+ Bxf3 Rxe1+ Rxe1 Rxf3 Kf1 Qxd5 Qe2 Qf5 Qe5+ Qf6 Qc5 Rxg3 Qxb5 Rf3 Re2 Rf4 Qc5 Kh7 h5 Qa1+ Re1 Qb2 Qe3 Qf6 b5 Qf5 b6 c3 b7 Qb5+ Qe2 Qxb7 Qd3+ f5 Qxc3 Qh1+ Ke2 Re4+ Kd1 Rxe1+ Qxe1 Qxh5+ Kd2 Qg5+ Qe3 Kg6 f4 
34   +0.58   00:12   1036M  f5 Qxf5 Rf6 Qc2 Qd4 Rad1 Nf3+ Bxf3 Rxe1+ Rxe1 Rxf3 Kf1 Qxd5 Qe2 Rf5 Qb2+ Kh7 Kg1 Rf3 Qe5 Rd3 Qxd5 Rxd5 Kf1 Kg7 Ra1 Kf6 Ke2 Ke5 f3 Rd3 Ra5 Kd4 Rxb5 Re3+ Kd1 Rxf3 Rb7 f5 Rd7+ Ke3 Kc2 Rxg3 Re7+ Kd4 Rd7+ Ke5 Rc7 Kd5 Rf7 Ke4 Rc7 f4 Rxc4+ Ke3 
35   +0.56   00:16   1330M  f5 Qxf5 Rf6 Qc2 Qd4 Rab1 Nf3+ Bxf3 Rxe1+ Rxe1 Rxf3 Kf1 Qxd5 Qe2 Qf5 Qe5+ Qf6 Qc5 Rxg3 Qxb5 Rf3 Re2 Rf4 h5 Kh7 Qc5 Qa1+ Re1 Qa8 Re3 Qh1+ Ke2 Qc1 Rg3 Qb1 Rh3 Qe4+ Qe3 Qc2+ Kf1 Qf5 Kg1 Rg4+ Rg3 Qxh5 Kg2 Rxg3+ fxg3 Qb5 Qc3 Kg6 Kf2 h5 Ke3 Qb6+ Kd2 Qd6+ Kc1 Qc6 Qc2+ Kg7 Qc3+ f6 Kb2 Qb5 Qd2 h4 gxh4 Qe5+ Kc2 
36   +0.35   00:19   1573M  f5 Qxf5 Rf6 Qc2 Qd4 Rad1 Nf3+ Bxf3 Rxe1+ Rxe1 Rxf3 Kf1 Qxd5 Qe2 Qf5 Qe5+ Qf6 Qc5 Rxg3 Qxb5 Rf3 Re2 Rf4 h5 Kh7 Qc5 Qa1+ Re1 Qa8 Re3 Qh1+ Ke2 Qc1 Rg3 Qa1 Rh3 Qa2+ Kf1 Qb1+ Ke2 Qc2+ Kf1 Qd1+ Kg2 Qe1 Rg3 Qe4+ f3 Qe2+ Qf2 Qxf2+ Kxf2 c3 Ke3 Rxb4 Kd3 Rh4 Kxc3 Rxh5 Kd4 Rg5 Rh3 Kg6 Ke3 Rg2 Rh1 
37   +0.46   00:20   1632M  f5 Qxf5 Rf6 Qc2 Qd4 Rab1 Nf3+ Bxf3 Rxe1+ Rxe1 Rxf3 Kf1 Qxd5 Qe2 Rf5 Qe4 Qxe4 Rxe4 Rd5 Ke2 Kf6 g4 c3 Re3 Rd2+ Ke1 Rd4 Rxc3 Rxg4 Rc6+ Kg7 Rc5 Rxb4 Ke2 Rb2+ Ke3 b4 Rb5 b3 h5 Kf6 Kf3 Rb1 Kf4 Ke6 Ke4 Kd6 Kd3 f6 Kc3 Ke6 Kd3 
38   +0.64   00:22   1853M  f5 Qxf5 Rf6 Qc2 Qd4 Rab1 Nf3+ Bxf3 Rxe1+ Rxe1 Rxf3 Kf1 Qxd5 Qe2 Rf5 Qe4 Qxe4 Rxe4 Kf6 Rd4 Ke6 Rd8 Rd5 Rc8 Ke5 Ke2 Rd6 Re8+ Re6 Rc8 Ra6 Kd2 f6 Rb8 Kd4 Rd8+ Ke4 Kc2 Ra2+ Kc3 Ra3+ Kc2 Rf3 Re8+ Kd5 Rd8+ Ke6 Rb8 Rxf2+ Kc3 Rf3+ Kc2 Rf5 g4 Rd5 Rh8 Rd4 Rb8 Rxg4 Rxb5 f5 Rb6+ Ke5 Rxh6 Rg2+ Kd1 f4 b5 Rb2 Rc6 
39   +0.58   00:25   2070M  f5 Qxf5 Rf6 Qc2 Qd4 Rad1 Nf3+ Bxf3 Rxe1+ Rxe1 Rxf3 Kf1 Qxd5 Qe2 Rf5 Qe4 Kf6 f4 h5 Qe3 Kg6 Kf2 Qd7 Qe4 Kf6 Re2 Kg7 Qe7 Qd1 Qe3 Rd5 Qc3+ Kg6 Qh8 Qd4+ Qxd4 Rxd4 Re5 c3 Rg5+ Kf6 Ke2 Rxb4 Rxh5 Rb2+ Kd3 b4 Rc5 Ke6 h5 Kd6 Rc8 Kd5 Rd8+ Ke6 Rc8 Kf5 Kc4 c2 
40   +0.40   00:30   2480M  f5 Qxf5 Rf6 Qc2 Qd4 Rab1 Nf3+ Bxf3 Rxe1+ Rxe1 Rxf3 Kf1 Qxd5 Qe2 Rf5 Qe4 Kf6 f4 h5 Qe3 Qh1+ Kf2 Qh2+ Kf3 Rd5 Rd1 Qh3 Qc3+ Ke7 Rxd5 Qh1+ Kf2 Qxd5 Qh8 Qd2+ Kf1 Qd1+ Kf2 Qd5 Qg7 Ke6 Qh8 Qd2+ Kf3 Qd1+ Ke3 Qg1+ Kf3 Kd7 Qg7 Qf1+ Ke3 Qd3+ Kf2 Qd2+ Kf3 Qd5+ Ke3 Kd6 Qg8 Kc7 Qg7 Kd7 Qg5 Kc6 Qg8 Qd3+ Kf2 Qd2+ Kf3 Qd7 Qh8 Kb7 Qc3 Qd6 Kf2 Kc7 Qg7 Qd2+ Kf3 Qd3+ Kf2 
41   +0.43   00:34   2886M  f5 Qxf5 Rf6 Qc2 Qd4 Rac1 Nf3+ Bxf3 Rxe1+ Rxe1 Rxf3 Kf1 Qxd5 Qe2 Qf5 Qe5+ Qf6 Qc5 Rxg3 Qxb5 Rf3 Re2 Rf4 h5 Kh7 Qc5 Qa1+ Re1 Qa8 Re3 Qh1+ Ke2 Qc1 Rg3 Qb1 Rh3 Qe4+ Qe3 Qc2+ Kf1 Qf5 Kg1 Rg4+ Rg3 Qxh5 Kg2 Rxg3+ fxg3 Qb5 Qc3 Kg6 Kf2 Kf5 Qd2 Ke4 Qe2+ Kd5 Qh5+ Kc6 Qxf7 Qb6+ Ke2 Qd4 Qe8+ Kb6 Qb8+ Ka6 Qf4 Qb2+ Kf3 Qb3+ Kf2 Kb5 
42   +0.31   00:44   3666M  f5 Qxf5 Rf6 Qc2 Qd4 Rad1 Nf3+ Bxf3 Rxe1+ Rxe1 Rxf3 Kf1 Qxd5 Qe2 Rf5 Qe4 Kf6 f4 h5 Qe3 Qh1+ Kf2 Qh2+ Kf3 Rd5 Rd1 Qh3 Qc3+ Ke7 Qe3+ Kf8 Rxd5 Qh1+ Kf2 Qxd5 Qc3 Ke7 Qg7 Ke6 Qh8 Qd2+ Kf3 Qd1+ Ke3 Qg1+ Kf3 Kd7 Qg7 Qf1+ Ke3 Qe1+ Kf3 Ke6 Qh8 Ke7 Qg7 Qf1+ Ke3 Qd3+ Kf2 Qd5 Qh8 Qd2+ Kf1 Qd1+ Kf2 f6 Qc8 Qd2+ Kf3 Qxb4 Qb7+ Kd6 Qb8+ Ke7 Qc7+ Ke8 
43   +1.59   01:22   6553M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Qxh4 Qc5 Re6 Qc3+ Rf6 Qg3+ Qxg3 fxg3 Rb6 Rb1 Rdb8 Rd1 Rd6 Rb1 Kf6 b5 Rdb6 Bf1 Rd8 Rd1 Rdd6 Kf2 Ke5 Re1+ Kxd5 Rd1+ Ke6 Rc1 Ke7 Rc5 Rf6+ Kg1 Rbd6 Bc4 Kd8 Kg2 Kd7 Bd5 Ke7 Bc4 Rd2+ Kh3 
44   +1.71   01:46   8331M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Rd3 Rxf1+ Bxf1 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd6 Rd3+ Ke7 Re3+ Kf8 Rg3 Qe4 Bh5 f6 Rh3 f5 Kf1 Kg7 Be2 Qc6 Rg3+ Kf6 Rh3 Ke5 Bd3 Qc1+ Kg2 Qg5+ Rg3 
45   +1.72   02:13  10291M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qe4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke7 Kg2 Qe4+ Bf3 Qe5 Rh3 Qg5+ Rg3 Qd2 Bh5 Qd5+ Bf3 Qd6 Rh3 Qd2 Rh5 Qf4 Rh3 f5 Rg3 Kf6 Be2 Qe4+ Bf3 Qe5 Kg1 Ke7 Bh5 Qc5 Kg2 f4 Rh3 Qe5 
46   +1.73   02:25  11206M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qe4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke7 Kg2 Qe4+ Bf3 Qe5 Rh3 Qg5+ Rg3 Qd2 Bh5 f6 Re3+ Kd6 Bf3 f5 Be2 Kc5 Kf1 Kd4 Kg2 Qb2 Rd3+ Ke5 Kf1 Qc1+ Kg2 Qc6+ Kg1 Ke6 Rh3 Ke7 Bf3 
47   +1.73   02:34  11862M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qb4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke7 Kg2 Qe4+ Bf3 Qe5 Rh3 f5 Bh5 Qd5+ Bf3 Qd2 Kf1 Kd6 Be2 Ke5 Re3+ Kd4 Kg2 Qa2 Rd3+ Ke5 Bh5 Qa8+ Kg1 Qg8+ Rg3 Qc4 Re3+ Kf6 Rg3 
48   +1.73   02:35  11960M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qb4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd6 Rd3+ Kc5 Rc3+ Kb4 Rg3 f5 Kg2 Qe4+ Bf3 Qe5 Bh5 Kc4 Re3 Qg7+ Kf1 Qb2 Kg2 Qb7+ Bf3 Qg7+ Kf1 Qb2 Bh5 Qb1+ Kg2 Kd4 Be2 Qa2 Kf1 Qb2 Rh3 Qc1+ Kg2 Qc6+ Kg1 Qc2 Kf1 Ke5 
49   +1.73   02:40  12328M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qb4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd6 Rd3+ Kc5 Rc3+ Kb4 Rg3 f5 Kg2 Qe4+ Bf3 Qe5 Bh5 Kc5 Kf1 Qe4 Bf3 Qc4+ Be2 Qh4 Kg2 Qe4+ Bf3 Qe5 Bh5 Kd4 Rh3 Qg7+ Kf1 Qg5 Be2 Qc1+ Kg2 Qd2 
50   +1.73   02:45  12629M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qb4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd6 Rd3+ Kc5 Rc3+ Kb4 Rg3 f5 Kg2 Qe4+ Bf3 Qe5 Bh5 Kc5 Kf1 Qb2 Kg2 Qb7+ Kg1 Qd5 Bf3 Qd2 Rh3 Kd6 Kg2 Ke6 Kf1 Ke7 Bh5 Qd5 Bf3 Qc5 Kg2 
51   +1.73   02:49  12945M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qb4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd6 Rd3+ Kc5 Rc3+ Kb4 Rg3 f5 Kg2 Qe4+ Bf3 Qe5 Bh5 Kc5 Kf1 Qb2 Kg2 Qb7+ Kg1 Qd5 Bf3 Qd2 Rh3 Kd6 Kg2 Ke6 Kf1 Ke7 Bh5 Qd5 Bf3 Qc5 Kg2 Qd4 Rh5 
52   +1.73   02:55  13365M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qb4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd6 Rd3+ Kc5 Rc3+ Kb4 Rg3 f5 Kg2 Qe4+ Bf3 Qe5 Bh5 Kc5 Kf1 Qb2 Kg2 Qb7+ Kg1 Qd5 Bf3 Qd2 Rh3 Kd6 Kg2 Ke7 Rg3 Ke6 Rg6+ Ke5 Bh5 Qf4 Bf3 Kd4 
53   +1.73   03:25  15540M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qb4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd6 Rd3+ Kc5 Rc3+ Kb4 Rg3 f5 Kg2 Qe4+ Bf3 Qe5 Bh5 Kc5 Kf1 Qa1+ Kg2 Kd4 Rf3 Qa8 Kf1 Qa6+ Kg1 Qa2 Rh3 Ke5 Kg2 Qd5+ Bf3 Qd2 Rh5 Kf6 Rh3 Ke6 Kf1 Ke7 Kg2 
54   +1.73   03:45  17115M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qb4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd6 Rd3+ Kc5 Rc3+ Kb4 Rg3 f5 Kg2 Qe4+ Bf3 Qe5 Bh5 Kc5 Kf1 Qa1+ Kg2 Kd4 Rf3 Qa8 Kf1 Qa6+ Kg1 Qa2 Rh3 Ke5 Kg2 Qd5+ Bf3 Qd2 Rh5 Ke6 Rh3 Kf6 Rh5 Qf4 Rh3 Ke7 Bh5 
55   +1.73   03:58  18180M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qe4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd6 Rd3+ Kc5 Rc3+ Kb4 Rg3 f5 Kg2 Qe4+ Bf3 Qe5 Bh5 Kc5 Rh3 Kd4 Kf1 Qe4 Be2 Qc2 Rh4+ Kd5 Rh5 Ke5 Rh3 Qd2 Bf3 Qc1+ Kg2 Qg5+ Kf1 Kd4 Be2 Qd2 Rh4+ Kd5 Rh3 Qc1+ Kg2 Ke6 Bd3 Qg5+ Kh2 Kd6 
56   +1.73   04:29  20599M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qe4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd5 Rd3+ Kc5 Rc3+ Kb4 Rg3 f5 Kg2 Qe4+ Bf3 Qe5 Bh5 Kc5 Rh3 Kd4 Kf1 Qe4 Be2 Qb1+ Kg2 Qa2 Bf3 Qd2 Kf1 Ke5 Be2 Qc1+ Kg2 Qc6+ Bf3 Qg6+ Rg3 Qf6 Rh3 Qg5+ Rg3 Qc1 Rh3 Qd2 
57   +1.73   04:39  21369M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qe4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd5 Rd3+ Kc5 Rc3+ Kb4 Rg3 f5 Re3 Qg5+ Rg3 Qd2 Kf1 Kc5 Rh3 Kd4 Bf3 Ke5 Be2 Qc1+ Kg2 Qc6+ Kg1 Qc2 Kf1 Qd2 Re3+ Kf6 Rh3 Kg7 Rh5 Qc2 Rh3 Qb1+ Kg2 Qe4+ Bf3 Qd4 Bh5 Qc4 Rg3+ Kf8 Rf3 
58   +1.73   05:11  23823M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qe4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd5 Rd3+ Kc5 Rc3+ Kb4 Rg3 f5 Re3 Qg5+ Rg3 Qd2 Kf1 Kc5 Rh3 Kd4 Bf3 Ke5 Be2 Qc1+ Kg2 Qc6+ Kg1 Qc2 Kf1 Qd2 Re3+ Kf6 Rh3 Kf7 Bh5+ Ke7 Be2 Qc2 Re3+ Kf7 Rh3 Qc1+ Kg2 Qc6+ Bf3 Qe6 Kf1 Kg7 Be2 Qd5 
59   +1.73   05:23  24787M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qe4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd5 Rd3+ Kc5 Rc3+ Kb4 Rg3 f5 Re3 Qg5+ Rg3 Qd2 Bh5 Kc4 Kg2 Kc5 Rh3 Kd6 Bf3 Ke7 Kf1 Qb2 Kg2 Qg7+ Rg3 Qd4 Bh5 Qh4 Bf3 Kf7 Be2 Qe4+ Bf3 Qc2 Bh5+ Kf6 Rg6+ Ke5 Rxh6 Qc7 Kg3 
60   +1.73   06:40  30861M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qe4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd5 Rd3+ Kc5 Rc3+ Kb4 Rg3 f5 Re3 Qg5+ Rg3 Qd2 Kf1 Qc1+ Kg2 Qc6+ Bf3 Qc2 Rh3 Qd2 Bh5 Kc5 Rg3 Qd5+ Bf3 Qe5 Rh3 Qg7+ Kf1 Qa1+ Kg2 Qa6 Rh5 Kd4 Rh3 Ke5 Rh4 Qe6 Be2 Qa2 Bf3 Qd2 Rh5 Ke6 Kh1 
61   +1.73   07:09  33166M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qe4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd5 Rd3+ Kc5 Rc3+ Kb4 Rg3 Qd8 Bh5 f6 Kg2 Qa5 Rh3 Qg5+ Kf1 Qf5 Kg2 Kc4 Bf3 Qg6+ Rg3 Qd3 Rg4+ Kc3 Re4 Qb1 Re3+ Kd4 Be2 Qf5 Rh3 Qe4+ Kf1 Qb1+ Kg2 Qf5 Bh5 Qd5+ Kf1 Qd7 Kg2 Qb7+ Bf3 Qg7+ Kf1 Qg5 Bh5 Qc1+ Kg2 Qd2 Rh4+ Ke5 
62   +1.73   08:12  38149M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qe4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd5 Rd3+ Kc5 Rc3+ Kb4 Rg3 Qd8 Bh5 f6 Kg2 Qa5 Rh3 Qg5+ Kf1 Qf5 Kg2 Kc4 Bf3 Qg6+ Rg3 Qd3 Rg4+ Kc3 Re4 Qb1 Re3+ Kd4 Be2 Qc2 Kf1 Qc1+ Kg2 Qc6+ Bf3 Qc2 Be2 Kd5 Bd3 Qd2 Be4+ Kd4 Bg6 Qc1 Rd3+ Kc5 Re3 Kc4 Bh5 
63   +1.73   08:54  41475M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qe4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd5 Rd3+ Ke6 Re3+ Kd7 Rd3+ Ke7 Re3+ Kf8 Rg3 Qe4 Bh5 Qb1+ Kg2 f6 Be2 Ke7 Rh3 Qe4+ Bf3 Qe5 Rh5 Qf4 Rh3 Qg5+ Rg3 Qd2 Rh3 Kd6 Rh5 Qf4 Rd5+ Ke7 Rh5 Kf7 Rh3 Qg5+ Rg3 Qf5 Rg4 Qe5 Rh4 f5 Rh3 Qd4 
64   +1.73   09:17  43273M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qe4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd5 Rd3+ Ke6 Re3+ Kd7 Rd3+ Ke7 Re3+ Kf8 Rg3 Qe4 Bh5 Qb1+ Kg2 f6 Be2 Ke7 Rh3 Qe4+ Bf3 Qe5 Rh5 Qf4 Rh3 Qg5+ Rg3 Qe5 Rg7+ Kd8 Rg4 Kc7 Rg7+ Kb6 Rg4 Kc5 Rh4 f5 Rh3 Kb4 Bh5 Qd4 Be2 Qg7+ Kf1 Qe5 Bd3 f4 
65   +1.73   11:33  54081M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qe4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd5 Rd3+ Ke6 Re3+ Kd7 Rd3+ Ke7 Re3+ Kf8 Rg3 Qe4 Bh5 Qb1+ Kg2 f6 Be2 Ke7 Rh3 Qe4+ Bf3 Qe5 Rh5 Qf4 Rh3 Qg5+ Rg3 Qe5 Rg7+ Kd6 Rg4 Qc5 Kg3 Ke6 Re4+ Kf7 Kg2 Qg5+ Rg4 Qf5 Rb4 Ke7 Rg4 Qc5 Rh4 Qg5+ Rg4 Qd2 
66   +1.73   11:35  54241M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qe4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd5 Rd3+ Ke6 Re3+ Kd7 Rd3+ Ke7 Re3+ Kf8 Rg3 Qf4 Rh3 Ke7 Bh5 Qc1+ Kg2 Qg5+ Kf1 f6 Be2 Qc1+ Kg2 Kf8 Bg4 Qf4 Bf3 Qg5+ Rg3 Qc1 Rg4 Kf7 Rh4 Qd2 Rh3 Qg5+ Kf1 Qc1+ Kg2 Qd2 Rg3 Ke7 Rh3 f5 Kf1 Qd3+ Kg2 Qd4 Bh5 Kf6 
67   +1.73   12:09  56915M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qe4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd5 Rd3+ Ke6 Re3+ Kd7 Rd3+ Ke7 Re3+ Kf8 Rg3 Qf4 Rh3 Ke7 Bh5 Qc1+ Kg2 Qg5+ Kf1 f6 Be2 Qc1+ Kg2 Kf8 Bg4 Qf4 Bf3 Qg5+ Rg3 Qc1 Rg4 Kf7 Rh4 Qd2 Rh3 Qg5+ Kf1 Qc1+ Kg2 Qd2 Rg3 Ke7 Rh3 Kd6 Rh5 Qf4 Be2 Ke7 Bf3 Ke6 
68   +1.73   13:17  62319M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qe4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd5 Rd3+ Ke6 Re3+ Kd7 Rd3+ Ke7 Re3+ Kf8 Rg3 Qe4 Bh5 Qe1+ Kg2 f6 Re3 Qb4 Re8+ Kg7 Re3 Qc5 Rh3 Qd5+ Bf3 Qd2 Rh5 Qf4 Rh3 Kf8 Rg3 Qd6 Rh3 Qd2 Kf1 Ke7 Be2 Qg5 Re3+ Kf8 Rg3 Qc1+ Kg2 Qd2 Bf3 Kf7 Rh3 Qc1 Be2 Ke7 Bf3 Kd6 Rh5
Dann Corbit wrote: ↑Sat Apr 18, 2020 5:35 am A few more plies

Code: Select all

69   +1.73   16:12  76196M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qe4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd5 Rd3+ Ke6 Re3+ Kd7 Rd3+ Ke7 Re3+ Kf8 Rg3 Qd4 Rh3 Qf4 Kf1 f6 Kg2 Kf7 Bf3 Qg5+ Rg3 Qd2 Rg4 Kf8 Rg3 Ke7 Rh3 Qg5+ Rg3 Qc1 Bh5 Ke6 Be2 Ke5 Re3+ Kd6 Rd3+ Kc5 Rh3 Qg5+ Kf1 Kb4 Rh5 Qc1+ Kg2 Qd2 Kf1 Kb3 Rb5+ Kc3 Rc5+ Kd4 Rf5 Ke4 Bg4 Qc1+ Kg2 Kd4 Rxf6 Qg5 
70   +1.73   16:53  79418M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qe4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd5 Rd3+ Ke6 Re3+ Kd7 Rd3+ Ke7 Re3+ Kf8 Rg3 Qd4 Rh3 Qd2 Kf1 Qc1+ Kg2 Ke7 Re3+ Kd6 Bh5 f6 Bg4 Kc7 Bf3 Qc5 Re4 Kd6 Rg4 Qe5 Rh4 Qg5+ Rg4 Qd2 Rh4 Qc1 Rh5 Qf4 Rd5+ Ke7 Rh5 Ke6 Bd5+ Kd6 Bf3 Ke7 Rh3 Qc1 Rg3 Ke6 Be2 Qc2 Bg4+ Ke5 Re3+ Kf4 
71   +1.73   18:57  89402M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qe4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd5 Rd3+ Ke6 Re3+ Kd7 Rd3+ Ke7 Re3+ Kf8 Rg3 Qe4 Bh5 f6 Rh3 Qf5 Kg2 Qg5+ Kf1 Qc1+ Kg2 Qd2 Rg3 Qa5 Rh3 Ke7 Bg4 Qd5+ Kg3 Qd3+ Kg2 Qg6 Kf3 Kf8 Kf4 Qg5+ Kf3 Qd5+ Kg3 Qd6+ Kf3 Kg7 Kg2 Qf4 Rg3 Kf7 Bf3 Qe5 Rg4 Qc5 Be2 Qc6+ Bf3 Qc1 Rh4 Qg5+ Rg4 
72   +1.73   20:33  97096M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qe4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd5 Rd3+ Ke6 Re3+ Kd7 Rd3+ Ke7 Re3+ Kf8 Rg3 Qe4 Bh5 f6 Rh3 Qf5 Kg2 Qg5+ Kf1 Ke7 Be2 Qc1+ Kg2 Qf4 Kf1 Qg5 Re3+ Kf8 Rg3 Qc1+ Kg2 Qc5 Rh3 Kf7 Rh5 Qc1 Bf3 Qf4 Rh1 Kg7 Rh3 Qd2 Be4 Qd4 Rg3+ Kf7 Rg4 Qd2 Bf3 Qc1 Be4 Ke7 Bf3 Qc5 Re4+ Kd7 Bg4+ Kc7 
73   +1.73   22:53 108301M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qe4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd5 Rd3+ Ke6 Re3+ Kd7 Rd3+ Ke7 Re3+ Kf8 Rg3 Qe4 Bh5 Qe1+ Kg2 f6 Re3 Qb4 Rh3 Qe4+ Bf3 Qf5 Be2 Qg5+ Kf1 Kf7 Bh5+ Ke7 Be2 Qc1+ Kg2 Qf4 Kf1 Kd6 Rd3+ Kc7 Rc3+ Kd8 Rd3+ Ke8 Re3+ Kf8 Rh3 Kg8 Bh5 Qc1+ Kg2 Kf8 Be2 Qe1 Bg4 Kg7 Rg3 Qe5 Be6+ Kf8 Bg4 h5 Bf3 Kf7 Rh3 Qg5+ Rg3 Qh6 Rh3 
74   +1.73   24:00 113664M  f5 Qd1 Rdd8 Re3 f4 gxf4 Nd3 Rxd3 cxd3 Qxd3 Qf6 Rd1 Qxf4 Qxb5 Rc8 Qf1 Qxb4 d6 Rcd8 d7 Rxd7 Rxd7 Re1 Qxe1 Qxe1+ Bf1 Qe4 Rd3 Qxh4 Rg3+ Kf6 Be2 Ke5 Re3+ Kd5 Rd3+ Ke6 Re3+ Kd7 Rd3+ Ke7 Re3+ Kf8 Rg3 Qe4 Bh5 Qe1+ Kg2 f6 Re3 Qb4 Rh3 Qe4+ Bf3 Qf5 Be2 Qg5+ Kf1 Kf7 Bh5+ Ke7 Be2 Qc1+ Kg2 Qf4 Kf1 Kd6 Rd3+ Kc7 Rc3+ Kd8 Rd3+ Ke8 Re3+ Kf8 Rh3 Kg8 Bh5 Qc1+ Kg2 Kf8 Be2 Qe1 Bg4 Kg7 Rg3 Qe5 Be6+ Kf8 Bg4 h5 Bf3 Kf7 Rh3 Qg5+ Rg3 Qh6 Rh3 
Nodes: 113664159150
Nodes/second: 78908784
Best move: f5
Unassisted SF is good for most positions you'll run into. Apparently this isn't one of them.

Code: Select all

( [Stockfish] 63:-(a moderately large number) 1...f5 ... snip...snip
I'm pretty sure this is good enough for a win. There are, of course, other lines, but they all seem to have the same outcome. :mrgreen:

Ovyron is always spouting off about how good his analysis is. This would be a good chance for him to show his "stuff". If he's up for the challange!

Regards,

Zenmastur
Only 2 defining forces have ever offered to die for you.....Jesus Christ and the American Soldier. One died for your soul, the other for your freedom.
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Ovyron
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Re: test for pruning

Post by Ovyron »

Zenmastur wrote: ↑Mon Apr 20, 2020 2:38 am Ovyron is always spouting off about how good his analysis is. This would be a good chance for him to show his "stuff". If he's up for the challange!
Oh, sure, give me someone willing to defend the white side and I'll see what I can do :P

For the record, I did get this to -2.50, but I have no idea what's white's best defense (just like I have no idea about what is white's best line for 1.g4, even after months of analysis - my guess is lost positions look like that...)
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Zenmastur
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Re: test for pruning

Post by Zenmastur »

Ovyron wrote: ↑Tue May 05, 2020 5:37 am
Zenmastur wrote: ↑Mon Apr 20, 2020 2:38 am Ovyron is always spouting off about how good his analysis is. This would be a good chance for him to show his "stuff". If he's up for the challange!
Oh, sure, give me someone willing to defend the white side and I'll see what I can do :P

For the record, I did get this to -2.50, but I have no idea what's white's best defense (just like I have no idea about what is white's best line for 1.g4, even after months of analysis - my guess is lost positions look like that...)
I don't have a clue what the best defense is either. In order to know that one would have to have a proof tree. Mate is probably 150 moves away or more so there is no chance of ever knowing for sure. I plan on playing the defense that gave white the best score on my first run analysis of the position which is the same as Dann's analysis. i.e 2. Qd1 But, maybe I should try one of the other defenses.

You are right, it's very difficult to try to find the best defensive moves when all moves seem to lose. The alternative is to have an unclear and unresolvable position which would, in the end be less useful since all outcomes would be possible. I figure if you fail to win this you screwed up and it will be obvious to all.

I'll defend, start a game.

Regards,

Zenmastur
Only 2 defining forces have ever offered to die for you.....Jesus Christ and the American Soldier. One died for your soul, the other for your freedom.
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Re: test for pruning

Post by Zenmastur »

Or, if you would prefer, I could play black and show you how it's done! :mrgreen:

Regards,

Zenmastur
Only 2 defining forces have ever offered to die for you.....Jesus Christ and the American Soldier. One died for your soul, the other for your freedom.
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Ovyron
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Re: test for pruning

Post by Ovyron »

Zenmastur wrote: ↑Wed May 06, 2020 3:12 am I could play black and show you how it's done! :mrgreen:
I'll chicken out from that one, but here's our game thread! Good luck!
Your beliefs create your reality, so be careful what you wish for.
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Ovyron
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Re: test for pruning

Post by Ovyron »

Game just finished:

[pgn]
[Event "Zenmastur vs Ovyron No it's not another GROB II!"]
[Site "Talkchess.com"]
[Date "2020.05.02"]
[Round "2"]
[White "Zenmastur"]
[Black "Ovyron"]

1.g3 a5 2.a4 d5 3.d4 Bd7 4.Bg2 Bxa4 5.Bd2 Bd7 6.Bxa5 Rxa5 7.b4 b5 8.c4 dxc4 9.Nc3 e5 10.Nd5 Nf6 11.Nxf6+ gxf6 12.Nh3 c6 13.Bxc6 Bg7 14.Bg2 O-O 15.Nf4 exf4 16.d5 Nc6 17.Qd2 Bh6 18.Qxf4 Ra8 19.Qxh6 Bh3 20.Bxh3 Qb6 21.Bg2 Ne5 22.e3 Rad8 23.O-O Qxe3 24.h4 Qb6 25.Qd2 Kg7 26.Qe2 Rd6 27.Qf3 Re8 28.Rfe1 h6 29.Qh5 f5 30.Qd1 Rdd8 31.Re3 f4 32.gxf4 Nd3 33.Rxd3 cxd3 34.Qxd3 Qf6 35.Rd1 Qxf4 36.Qxb5 Qxh4 37.Qc5 Re6 38.Qc3+ Rf6 39.Qd4 Qxd4 40.Rxd4 Kf8 41.b5 Ke7 42.Rd1 Rb8 43.Rb1 Rbb6 44.Bf1 Rf5 45.Be2 Rxd5 46.Rb3 Rf5 47.Bd3 Rg5+ 48.Kf1 Kd6 49.Rb4 Rd5 50.Be2 Rf5 51.f3 Rh5 52.Kf2 Rh2+ 53.Ke3 h5 54.Rb1 h4 55.f4 Ke7 56.Bg4 Ra2 57.Kd4 Rd6+ 58.Kc5 Rc2+ 59.Kb4 Rd4+ 60.Ka5 Rxf4 61.Bh3 Ra2+ 62.Kb6 f5 63.Kc6 Rc2+ {White resigns. 0-1} 0-1[/pgn]

Game begins after 29.Qh5, I had to construct a dummy game to analyze with Chess Openings Wizard.

31...f4 surprised many people in the thread, as they expected a different move that was clearly winning. Without 6men tablebases it's possible Zenmastur could have saved the game if I wasn't allowed to play 31...f4.

But after f4? Pancakes!
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