do programs avoid 56. ...dxc5

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pilgrimdan
Posts: 405
Joined: Sat Jul 02, 2011 10:49 pm

do programs avoid 56. ...dxc5

Post by pilgrimdan »

1.Nf3 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 O-O 5.O-O d6 6.d4 Nbd7 7.Nc3 e5 8.h3
exd4 9.Nxd4 Nb6 10.Qd3 Nfd7 11.b3 Nc5 12.Qd2 Bd7 13.Ba3 a5 14.e3 Re8
15.Rfc1 a4 16.Qc2 c6 17.Rd1 Qe7 18.Rf1 f5 19.Bb4 Ra6 20.Rad1 Bc8 21.Rfe1
Nbd7 22.e4 Qf7 23.Re3 f4 24.gxf4 Qxf4 25.Nce2 Qf7 26.f4 Qe7 27.Be1 axb3
28.axb3 Nb6 29.Bf2 Bd7 30.b4 Ne6 31.Nb3 Rea8 32.Qd3 Ra2 33.f5 Nf8 34.Rg3
Na4 35.Rd2 Rxd2 36.Qxd2 Be5 37.Rf3 Be8 38.Qc2 Nd7 39.Nbc1 Nab6 40.c5 Nc8
41.Rd3 Bf7 42.Rd1 gxf5 43.exf5 Qg5 44.Qe4 Nf6 45.Qh4 Qxf5 46.Bg3 Bd5
47.Rf1 Qg6 48.Rf2 Ne8 49.Nf4 Qg7 50.Bxd5+ cxd5 51.Nce2 Qf7 52.Qg5+ Bg7
53.Nxd5 Qe6 54.Kh2 Ra2 55.Ndf4 Qe4 56.Qg4

[d]2n1n1k1/1p4bp/3p4/2P5/1P2qNQ1/6BP/r3NR1K/8 b - - 0 56
56. ...dxc5?
57.Qxc8 cxb4 58.Ne6 Qc6
59.Nc7 b3 60.Qd8 Rd2 61.Qxd2 Nxc7 62.Qd8+ Ne8 63.Nd4 Qg6 64.Re2 h6
65.Rxe8+ Kh7 66.Nxb3 Qf7 67.Nd2 Bf6 68.Qd3+ Kg7 69.Rc8 h5 70.Rc7 Qxc7
71.Bxc7 Be7 72.Be5+ Kf7 73.Qf5+ Ke8 74.Ne4 Kd8 75.Nd6 Bxd6 76.Bxd6 h4
77.Qf7 b6 78.Qc7+ Ke8 79.Qe7# *
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jdart
Posts: 4366
Joined: Fri Mar 10, 2006 5:23 am
Location: http://www.arasanchess.org

Re: do programs avoid 56. ...dxc5

Post by jdart »

Stockfish and Houdini do not even consider .. dxc5.

--Jon
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pilgrimdan
Posts: 405
Joined: Sat Jul 02, 2011 10:49 pm

Re: do programs avoid 56. ...dxc5

Post by pilgrimdan »

okay … thanks Jon … appreciate the response …
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Dann Corbit
Posts: 12540
Joined: Wed Mar 08, 2006 8:57 pm
Location: Redmond, WA USA

Re: do programs avoid 56. ...dxc5

Post by Dann Corbit »

I guess a better question is, "What move should you make?"
I say that because the position looks lost, so throwing yourself on the pike might be better for everybody.
[d]2n1n1k1/1p4bp/3p4/2P5/1P2qNQ1/6BP/r3NR1K/8 b - -

Code: Select all

Searching: 2n1n1k1/1p4bp/3p4/2P5/1P2qNQ1/6BP/r3NR1K/8 b - - 0 1
infinite: 0 time: 0 increment: 0 moves to go: 0

 1   -0.88   00:00    5748  Ra1 Qe6+ Qxe6 Nxe6 dxc5 
 2   -0.38   00:00   31393  Ne7 cxd6 Nxd6 
 3   -1.21   00:00   62771  Na7 Nc3 Rxf2+ Bxf2 Qe5 Ne2 
 4   -1.20   00:00   88294  Na7 Nd4 Rxf2+ Bxf2 Nc6 
 5   -1.34   00:00  115404  Na7 Qd7 Nf6 Qd8+ Qe8 
 6   -1.65   00:00  147707  Ra1 Rg2 Ne7 cxd6 Nxd6 
 7   -1.76   00:00  177755  Na7 Qd7 Nf6 Qd8+ Qe8 Qxd6 Nb5 Qd3 Kh8 
 8   -1.18   00:00  212111  Na7 Nc3 Rxf2+ Bxf2 Qe5 Ne2 Nf6 Qg3 
 9   -1.24   00:00  242834  Na7 Qd7 Ra1 Qe6+ Qxe6 Nxe6 Nb5 cxd6 Rd1 
10   -1.92   00:00  287116  Na7 Qd7 Ra1 Rg2 dxc5 Bh4 Qc6 Qe7 Nc8 Qd8 Kh8 bxc5 
11   -1.99   00:00  341862  Na7 Qd7 Ra1 Rg2 dxc5 Bh4 Qc6 Qf5 Kh8 bxc5 Qc7 Ng3 
12   -2.10   00:00  426433  Na7 Qd7 Ra1 Rg2 dxc5 Bh4 Qc6 Qe7 Nc8 Qd8 Kh8 bxc5 Na7 Bf2 Nb5 
13   -2.33   00:00  697573  Na7 Qd7 Nf6 Qd8+ Qe8 Qxd6 Nb5 Qd3 Kh8 Rg2 Qd7 Qc4 Ra1 Bh4 Qd1 Bxf6 Qh1+ Kg3 Bxf6 
14   -2.22   00:00  878512  Na7 cxd6 Nf6 Qe6+ Qxe6 Nxe6 Nd7 Bf4 Kf7 Be3+ Bf6 Bxa7 Rxa7 Nc5 Nxc5 bxc5 Ke6 Nf4+ Kf7 
15   -2.26   00:00   1060K  Na7 Qd7 Nf6 Qxd6 Nb5 Qd8+ Qe8 Qd3 Kh8 Rg2 Ra3 Qf5 Qe4 Qc8+ Ne8 Qd7 Nc3 Ne6 Ra8 Nxc3 Bxc3 
16   -2.11   00:00   1321K  Na7 cxd6 Nf6 Qe6+ Qxe6 Nxe6 Nd7 Rg2 Kf7 N2f4 Rxg2+ Kxg2 Nc6 Ng5+ Ke8 Nd5 h6 Ne6 Kf7 Nxg7 
17   -1.88   00:00   1858K  Na7 cxd6 Nf6 Qe6+ Qxe6 Nxe6 Nd7 Rg2 Kf7 Ng5+ Ke8 Nf4 Rxg2+ Kxg2 Bh6 Nxh7 Nc6 Ne6 Nxb4 Kf3 Nd5 Nhg5 
18   -1.76   00:00   3982K  Na7 cxd6 Nf6 Qe6+ Qxe6 Nxe6 Nd7 Rg2 Kf7 Ng5+ Kg8 Nf4 Rxg2+ Kxg2 Nc6 Nd5 Bh6 h4 Bxg5 hxg5 Kf7 Kf3 Nd4+ Kg4 Ke6 
19   -1.72   00:00   6763K  Na7 cxd6 Nf6 Qe6+ Qxe6 Nxe6 Nd7 Nc5 Nxc5 bxc5 Rc2 Nf4 Rxc5 Rd2 Nc6 Ne6 Bh6 Nxc5 Bxd2 Nxb7 Bg5 Kg2 Kf7 Kf3 Nd8 Nc5 Ne6 Nd3 Nd4+ Ke4 
20   -1.83   00:00   7021K  Na7 cxd6 Nf6 Qe6+ Qxe6 Nxe6 Nd7 Nc5 Nxc5 bxc5 Rc2 Nf4 Rxc5 Rd2 Nc6 Ne6 Bh6 Nxc5 Bxd2 Nxb7 Bg5 Kg2 Kf7 Kf3 Nd8 Nc5 Ne6 Nd3 
21   -1.86   00:00  10538K  Na7 cxd6 Nf6 Qe6+ Qxe6 Nxe6 Nd7 Rg2 Kf7 Ng5+ Ke8 Nf4 Rxg2+ Kxg2 Be5 Nd5 Bxg3 Kxg3 Nb5 Ne4 Ne5 Kf4 Nc4 Nef6+ Kd8 d7 Nd4 Ke4 Ne6 h4 b5 Nxh7 Kxd7 
22   -2.10   00:01  16709K  Na7 cxd6 Nf6 Qe6+ Qxe6 Nxe6 Nd7 Nc5 Nxc5 bxc5 Rc2 Nf4 Rxc5 Rd2 Nc6 d7 Nd8 Bh4 Be5 Rf2 Nc6 d8=Q+ Nxd8 Bxd8 Bd6 Kg2 Rf5 Nd3 Rxf2+ Kxf2 Kf7 
23   -1.89   00:01  17518K  Na7 cxd6 Nf6 Qe6+ Qxe6 Nxe6 Nd7 Nc5 Nxc5 bxc5 Rc2 Nf4 Rxc5 Rd2 Nc6 d7 Nd8 Bh4 Be5 Rf2 Ne6 d8=Q+ Nxd8 Bxd8 Bd6 Kg2 b5 Bb6 Rc6 Nd5 b4 Kf3 
24   -2.02   00:02  26704K  Na7 cxd6 Nf6 Qe6+ Qxe6 Nxe6 Nd7 Nc5 Nxc5 bxc5 Rc2 Nf4 Rxc5 Bh4 Rc4 d7 Nc6 d8=R+ Nxd8 Bxd8 Be5 Bg5 b5 Kg3 b4 Re2 Bd6 Rd2 Bc7 Rd3 Rc3 Kg4 Rxd3 Nxd3 b3 Kf5 Bd6 Be3 Ba3 Bd4 Kf7 Ke4 Bf8 Ne5+ Kg7 
25   -1.84   00:04  48564K  Na7 cxd6 Nf6 Qe6+ Qxe6 Nxe6 Nd7 Nc5 Nxc5 bxc5 Rc2 Nd4 Rxf2+ Bxf2 Bxd4 Bxd4 Nc6 Be3 Kf7 Kg3 Ke6 Kf3 Nd8 Kg4 Nf7 Bf4 Nd8 h4 Nf7 h5 Nd8 Bg5 Nf7 Be3 Kd5 h6 Ke6 Kg3 Ne5 
26   -2.23   00:05  63365K  Na7 cxd6 Nf6 Qe6+ Qxe6 Nxe6 Nd7 Nc5 Nxc5 bxc5 Rc2 Nd4 Rxf2+ Bxf2 Bxd4 Bxd4 Kf7 Kg3 Ke6 Be3 Nc6 Kf4 Nd8 Kg4 Nf7 Bf4 Nd8 h4 Nf7 Bg3 Nd8 Kg5 Nf7+ Kf4 Ne5 Ke4 Nd7 Kd4 Kf5 Kc4 Kg4 Be1 
27   -1.94   00:07  80501K  Na7 cxd6 Nf6 Qe6+ Qxe6 Nxe6 Nd7 Nc5 Nxc5 bxc5 Rb2 Nf4 Nc6 Ne6 Rxf2+ Bxf2 Be5+ Kg2 Kf7 Nc7 Kg6 Kf3 Kf5 Nd5 Bb2 Ne7+ Ke6 Nxc6 bxc6 Ke4 Bf6 Bd4 Bd8 Bg7 Kf7 Be5 Ke6 Bd4 Bh4 Be3 
28   -2.20   00:12 149816K  Na7 Qd7 Nf6 Qd8+ Qe8 Qxd6 Nb5 Qd3 Kh8 Nd4 Rxf2+ Bxf2 Nxd4 Bxd4 Qb8 Qg3 Qe8 Qe3 Qxe3 Bxe3 Bh6 b5 Bxf4+ Bxf4 Nd5 Be5+ Kg8 Kg2 Kf7 Kf3 Ke6 Ke4 h5 h4 Nb4 Bd6 
29   -2.36   00:17 204366K  Na7 Qd7 Nf6 Qd8+ Qe8 Qxd6 Nb5 Qd3 Kh8 Nd4 Rxf2+ Bxf2 Nxd4 Bxd4 Qb8 Qg3 Qe8 Qe3 Qxe3 Bxe3 Kg8 b5 Kf7 Kg2 Bh6 Kf3 Bxf4 Bxf4 Nd5 Be5 Ke6 Ke4 Nb4 Bd6 Nd5 Kd4 Nb4 Bf4 Nd5 Bg3 h5 c6 bxc6 bxc6 Ne7 Kc5 
30   -1.78   00:20 240540K  Na7 cxd6 Nf6 Qe6+ Qxe6 Nxe6 Nd7 Nc5 Nxc5 bxc5 Rb2 Nf4 Nc6 Ne6 Rxf2+ Bxf2 Be5+ Kg2 Kf7 Ng5+ Kg6 Be3 Bf6 Ne4 Bd8 Nd2 Kf5 Kg3 Ne5 Bd4 Bf6 Kf2 Nd7 Ke3 Bg5+ Kd3 Bxd2 Kxd2 Ke6 Kc3 Kd5 
31   -1.94   00:33 393887K  Na7 Qd7 Nf6 Qd8+ Qe8 Qxd6 Nb5 Qd3 Ra6 Bh4 Qd7 Qc4+ Kh8 Ng3 Nd4 Nfe2 Nxe2 Qxe2 Qd5 Qd2 Qe5 Re2 Qb8 b5 Ra4 Bxf6 Bxf6 Qh6 Bh4 Qd6 Qxd6 cxd6 Bxg3+ Kxg3 Rd4 Re6 Kg7 Kf2 Rd3 Ke2 Rd5 Kf3 Kf7 Re7+ Kf8 Rxb7 Rxd6 
32   -2.37   00:45 532565K  Na7 Qd7 Nf6 Qd8+ Qe8 Qxd6 Nb5 Qd3 Kh8 Nd4 Rxf2+ Bxf2 Nc7 Bg3 Qd8 Nf5 Qd7 Qxd7 Nxd7 Nd6 b6 Nd3 bxc5 bxc5 Nf6 c6 Nfd5 Kg2 Kg8 Kf3 Kf8 Nf5 Bc3 Nf4 Ne7 Nxe7 Kxe7 Ke4 Kd8 Nd5 Ba5 Bd6 Nxd5 Kxd5 Bc7 Kc5 h5 
33   -2.56   01:05 759673K  Na7 Qd7 Nf6 Qd8+ Qe8 Qxd6 Nb5 Qd3 Kh8 Nd4 Rxf2+ Bxf2 Nxd4 Bxd4 Qb8 Qg3 Qe8 Qf3 Qd7 Qe3 Ne8 Ne6 Bxd4 Nxd4 Qc7+ Kg1 Qg7+ Kf2 Nc7 Ke1 h5 b5 Qf6 b6 Na6 c6 bxc6 Qe8+ Kg7 Ne6+ Kh6 
34   -2.58   01:14 858627K  Na7 Qd7 Nf6 Qd8+ Qe8 Qxd6 Nb5 Qd3 Kh8 Nd4 Rxf2+ Bxf2 Nxd4 Bxd4 Qb8 Qg3 Qe8 Qf3 Qd7 Qe3 Ne8 Ne6 Bxd4 Nxd4 Qc7+ Kh1 Qd7 Qe5+ Kg8 Kh2 Qc7 Qxc7 Nxc7 b5 Kg7 Kg3 Kf6 b6 Na6 c6 bxc6 Nxc6 Nc5 Na5 Nd7 b7 Nb8 Nc4 
35   -2.60   01:21 947290K  Na7 Qd7 Nf6 Qd8+ Qe8 Qxd6 Nb5 Qd3 Kh8 Nd4 Rxf2+ Bxf2 Nxd4 Bxd4 Qb8 Qg3 Qe8 Qf3 Qd7 Qe3 Ne8 Ne6 Bxd4 Nxd4 Qc7+ Kg1 Qg7+ Kf2 Nc7 Ke1 Kg8 b5 Qg6 Kf2 Qf6+ Kg3 Qg7+ Kh4 Qf6+ Kg4 Kf7 Qe4 Qg7+ Kf3 Qf6+ Ke3 Qg5+ Qf4+ Qxf4+ Kxf4 Ke7 Kf5 
36   -2.65   01:31   1057M  Na7 Qd7 Nf6 Qd8+ Qe8 Qxd6 Nb5 Qd3 Kh8 Nd4 Rxf2+ Bxf2 Nxd4 Bxd4 Qb8 Qg3 Qe8 Qf3 Qf7 Qe3 Kg8 Ne6 Nh5 Nxg7 Qa2+ Kg1 Nxg7 Qe4 Ne6 Be5 Qd2 h4 Qc1+ Kh2 Qd2+ Kg3 Qd1 Qg4+ Qxg4+ Kxg4 Kf7 Kf5 Ke7 Ke4 Kd7 Kd5 Nc7+ Bxc7 Kxc7 b5 b6 c6 h5 
37   -2.44   01:37   1139M  Na7 Qd7 Nf6 Qd8+ Qe8 Qxd6 Nb5 Qd3 Kh8 Nd4 Rxf2+ Bxf2 Nxd4 Bxd4 Qb8 Qg3 Qe8 Qf3 Qf7 Qe3 Kg8 Ne6 Nh5 Nxg7 Qa2+ Kg1 Nxg7 Qe4 Ne6 Bc3 Qb3 Qd3 Nf8 Qg3+ Ng6 Qb8+ Nf8 Qe5 Qb1+ Kf2 Qg6 Ke3 Qg2 Qf5 Ng6 b5 Ne7 Qg4+ Qxg4 hxg4 Kf7 Ke4 Ke6 Bd4 Nd5 Be5 Ne7 g5 Nd5 Bf6 b6 c6 Nxf6+ gxf6 Kxf6 
38   -2.49   02:27   1724M  Na7 Qd7 Nf6 Qd8+ Qe8 Qxd6 Nb5 Qd3 Kh8 Nd4 Rxf2+ Bxf2 Nxd4 Bxd4 Qb8 Qg3 Qe8 Qf3 Qd7 Qd3 Ne8 Bxg7+ Qxg7 Qe3 Qb2+ Kg3 Ng7 Qe4 h5 Nd5 Qd2 Kh4 Kg8 Nf4 Qd8+ Kg3 Qd2 Kf3 Kf8 b5 Qc1 c6 bxc6 bxc6 Qc3+ Ke2 Qb2+ Kd3 Qb5+ Kc3 Qa5+ Qb4+ Qxb4+ Kxb4 Ke7 Kc5 Kd8 Kd6 Nf5+ Ke6 Ng3 Nd5 
39   -2.58   02:40   1883M  Na7 Qd7 Nf6 Qd8+ Qe8 Qxd6 Nb5 Qd3 Kh8 Nd4 Rxf2+ Bxf2 Nxd4 Bxd4 Qb8 Qg3 Qe8 Qf3 Qd7 Qd3 Ne8 Bxg7+ Qxg7 Qe3 Qb2+ Kg3 Ng7 Qe4 h5 Nd5 Qd2 Kh4 Kg8 Nf4 Qd8+ Kg3 Qd2 Kf3 Kf8 b5 Qc1 c6 bxc6 bxc6 Qc3+ Ke2 Qb2+ Kd3 Qb3+ Kd4 Qb4+ Ke5 Qb2+ Kd6 Ne8+ Kc5 Qc3+ Qc4 Qe5+ Nd5 Kf7 Qf4+ Ke6 Qxe5+ Kxe5 h4 Nd6 Nf6 
40   -2.93   05:14   3701M  Na7 Qd7 Nf6 Qd8+ Qe8 Qxd6 Nb5 Qd3 Kh8 Nd4 Rxf2+ Bxf2 Nxd4 Bxd4 Qb8 Qg3 Qe8 Qf3 Qd7 Qd3 Ne8 Bxg7+ Qxg7 Qe3 Qb2+ Kg3 Ng7 Qe4 h5 Kf3 Qd2 Qc4 Qe1 Qd4 Kg8 Qe4 Qh1+ Ke3 Qc1+ Kd4 Kf8 Ke5 Qc3+ Qd4 Qe1+ Kf6 Qe7+ Kg6 Qe8+ Kg5 Kg8 Qf6 Kh7 Qg6+ Qxg6+ Nxg6 Ne6+ Kf6 Nd4 Nf4 Nf3 Nxh5 Nd4 Nf4
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Dann Corbit
Posts: 12540
Joined: Wed Mar 08, 2006 8:57 pm
Location: Redmond, WA USA

Re: do programs avoid 56. ...dxc5

Post by Dann Corbit »

[d]2n1n1k1/1p4bp/3p4/2P5/1P2qNQ1/6BP/r3NR1K/8 b - - 0 1
a few more cycles:

Code: Select all

40   -2.93   05:14   3701M  Na7 Qd7 Nf6 Qd8+ Qe8 Qxd6 Nb5 Qd3 Kh8 Nd4 Rxf2+ Bxf2 Nxd4 Bxd4 Qb8 Qg3 Qe8 Qf3 Qd7 Qd3 Ne8 Bxg7+ Qxg7 Qe3 Qb2+ Kg3 Ng7 Qe4 h5 Kf3 Qd2 Qc4 Qe1 Qd4 Kg8 Qe4 Qh1+ Ke3 Qc1+ Kd4 Kf8 Ke5 Qc3+ Qd4 Qe1+ Kf6 Qe7+ Kg6 Qe8+ Kg5 Kg8 Qf6 Kh7 Qg6+ Qxg6+ Nxg6 Ne6+ Kf6 Nd4 Nf4 Nf3 Nxh5 Nd4 Nf4 
41   -2.96   07:18   5179M  Ne7 Ng6 Nf6 Qxe4 Nxe4 Nxe7+ Kh8 Rg2 dxc5 bxc5 Nxc5 Nf5 Bf6 Nd6 Bg7 Nf4 Rxg2+ Kxg2 Bf8 Nh5 h6 Kf3 Kh7 Kg4 Kg6 Nf4+ Kh7 Nd5 Kg6 Bf4 h5+ Kh4 b6 Be5 Nd3 Bg3 Nc5 Nf4+ Kf6 Nxh5+ Ke6 Nb5 Kf5 Bc7 Kg6 Ng3 Nd3 Bd6 Bxd6 
42   -2.96   08:53   6279M  Ne7 Ng6 Qxg4 Nxe7+ Kh8 hxg4 dxc5 bxc5 Nf6 Rg2 Ne4 Nf4 Rxg2+ Kxg2 Nxc5 Kf3 b5 Nfd5 Ne6 Nc6 Bb2 Ke4 Kg8 Bd6 Kf7 Ne5+ Kg7 Be7 Kg8 Bb4 Kg7 Nd3 Ba1 Bd2 Nd4 Nc7 Kg6 Ne5+ Kf6 g5+ Kg7 Bb4 Ne2 Ne8+ Kh8 Nd3 Bc3 Bxc3+ Nxc3+ Kf5 Nd5 Nd6 b4 
43   -3.01   10:36   7511M  Na7 Qd7 Nf6 Qd8+ Qe8 Qxd6 Nb5 Qd3 Kh8 Nd4 Rxf2+ Bxf2 Nxd4 Bxd4 Qb8 Qg3 Qe8 Qf3 Qd7 Qd3 Ne8 Bxg7+ Qxg7 Qe3 Qb2+ Kg3 Ng7 Qe4 h5 Nd3 Qb3 Kf3 Qf7+ Ke2 Qa2+ Ke3 Qa6 Qd5 Kh7 Qf7 Kh6 Ke4 Qb5 Kd4 Kh7 Qd5 Kg6 Qd6+ Kh7 Kc3 Qa4 Nf4 Qa2 Qg6+ Kg8 Nd3 Qf7 Qe4 Qf6+ Kc4 Ne6 Qe5 Qxe5 Nxe5 Kg7 b5 Kf6 c6 bxc6 
44   -2.88   11:05   7861M  Na7 Qd7 Nf6 Qd8+ Qe8 Qxd6 Nb5 Qd3 Kh8 Nd4 Rxf2+ Bxf2 Nxd4 Bxd4 Qb8 Qg3 Qe8 Qf3 Qd7 Qd3 Ne8 Bxg7+ Qxg7 Qe3 Qb2+ Kg3 Ng7 Qe4 h5 Kf3 Qc3+ Ke2 Qb2+ Ke3 Qa1 Nd3 Qa6 Qd5 Kh7 Qf7 Qb5 Kd2 Qa6 Qe7 Kg6 Nf4+ Kh7 Qd7 Kh6 Qd6+ Kg5 Qxa6 bxa6 c6 Nf5 Nd5 Nd6 
45   -3.12   18:40  12879M  Na7 Qd7 Nf6 Qd8+ Qe8 Qxd6 Nb5 Qd3 Kh8 Nd4 Rxf2+ Bxf2 Nxd4 Bxd4 Qb8 Qg3 Qe8 Qf3 Qd7 Qd3 Kg8 b5 Bh6 Qc4+ Qf7 Ne6 Bf4+ Kh1 Ne4 Qd5 Bd6 Kg2 Qg6+ Ng5+ Kf8 Qxe4 Qxg5+ Qg4 Qd5+ Qf3+ Qxf3+ Kxf3 Bh2 Be3 Ke7 Bf4 Bg1 c6 bxc6 bxc6 Bd4 Kg4 Ke6 Kg5 Bg7 Bg3 Bf8 Kg4 Be7 Kh5 Bf8 Bf4 Bg7 Kg5 Bf8 Kg4 Ke7 Kf5 Bg7 Be5 Bf8 Bc7 Bg7 Bf4 Bf8 Be5 Bh6
Down a full piece. Not seeing a fortress.
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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pilgrimdan
Posts: 405
Joined: Sat Jul 02, 2011 10:49 pm

Re: do programs avoid 56. ...dxc5

Post by pilgrimdan »

looks like this would have been a better time for Black to take the pawn...

1.Nf3 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 O-O 5.O-O d6 6.d4 Nbd7 7.Nc3 e5 8.h3
exd4 9.Nxd4 Nb6 10.Qd3 Nfd7 11.b3 Nc5 12.Qd2 Bd7 13.Ba3 a5 14.e3 Re8
15.Rfc1 a4 16.Qc2 c6 17.Rd1 Qe7 18.Rf1 f5 19.Bb4 Ra6 20.Rad1 Bc8 21.Rfe1
Nbd7 22.e4 Qf7 23.Re3 f4 24.gxf4 Qxf4 25.Nce2 Qf7 26.f4 Qe7 27.Be1 axb3
28.axb3 Nb6 29.Bf2 Bd7 30.b4 Ne6 31.Nb3 Rea8 32.Qd3 Ra2 33.f5 Nf8 34.Rg3
Na4 35.Rd2 Rxd2 36.Qxd2 Be5 37.Rf3 Be8 38.Qc2 Nd7 39.Nbc1 Nab6 40.c5 Nc8
41.Rd3 Bf7 42.Rd1 gxf5 43.exf5 Qg5 44.Qe4 Nf6 45.Qh4 Qxf5 46.Bg3
[d]r1n3k1/1p3b1p/2pp1n2/2P1bq2/1P5Q/6BP/4N1B1/2NR2K1 b - - 0 46
46. ... Bd5? (dxc5 looks better)
47.Rf1 Qh5 48.Qxh5 Bd4+ 49.Nxd4 Nxh5 50.Nf5 Nxg3 51.Nh6+ Kg7 52.Rxf7+
Kxh6 53.Kh2 Ra3 54.bxc5 Rc3 55.Na2 Rb3 56.Nc1 Rc3 57.Na2 Rb3 58.Nc1 Rc3
1/2-1/2
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Dann Corbit
Posts: 12540
Joined: Wed Mar 08, 2006 8:57 pm
Location: Redmond, WA USA

Re: do programs avoid 56. ...dxc5

Post by Dann Corbit »

There may be several drawing moves here:

Searching: [d]r1n3k1/1p3b1p/2pp1n2/2P1bq2/1P5Q/6BP/4N1B1/2NR2K1 b - - 0 1

Code: Select all

infinite: 0 time: 0 increment: 0 moves to go: 0

 1   +2.78   00:00    9894  Ra3 Bxe5 Qxe5 
 2   -0.18   00:00   37129  Ra6 cxd6 
 3   -0.11   00:00   84141  Qh5 cxd6 Qxh4 Bxh4 
 4   -0.35   00:00  116011  Qh5 cxd6 Qxh4 Bxh4 
 5   -0.13   00:00  142577  Qh5 cxd6 Qxh4 Bxh4 
 6   -0.21   00:00  168339  Qh5 cxd6 Qxh4 Bxh4 Nd7 
 7   -0.07   00:00  199805  Qh5 cxd6 Qxh4 Bxh4 Nd7 
 8   +0.25   00:00  260396  Qg6 Bxe5 dxe5 Kh2 Kg7 Rf1 
 9   -0.16   00:00  301026  Qh5 cxd6 Qxh4 Bxh4 Nd7 b5 Bxd6 Bg3 Bxg3 Nxg3 Ncb6 bxc6 bxc6 Bxc6 
10   -0.06   00:00  339703  Qh5 cxd6 Qxh4 Bxh4 Nd7 b5 Bxd6 bxc6 bxc6 Bxc6 
11   -0.10   00:00  415770  Qh5 cxd6 Qxh4 Bxh4 Nd7 b5 Bxd6 bxc6 bxc6 Bxc6 Ra7 Bg3 Rc7 
12   -0.06   00:00  539300  Qh5 cxd6 Qxh4 Bxh4 Nd7 b5 Bxd6 bxc6 bxc6 Bg3 Bxg3 Nxg3 Be6 Bxc6 Ra7 Be4 Rc7 Nf5 
13   -0.13   00:00  631520  Qh5 cxd6 Qxh4 Bxh4 Nd7 b5 Bxd6 bxc6 bxc6 Bxc6 Ra7 Bg3 Rc7 Bb5 Ne5 Rxd6 Nxd6 Bxe5 Nxb5 Bxc7 Nxc7 
14   -0.13   00:00   1132K  Qh5 cxd6 Qxh4 Bxh4 Nd7 b5 Bxd6 bxc6 bxc6 Bxc6 Ra7 Bg3 Rc7 Bg2 Bxg3 Nxg3 Ne5 Nce2 Rd7 Rxd7 
15   -0.17   00:00   1598K  Qh5 cxd6 Qxh4 Bxh4 Nd7 b5 Bxd6 bxc6 bxc6 Bxc6 Ra7 Bg3 Rc7 Bg2 Bxg3 Nxg3 Ne5 Nce2 Ne7 Ne4 Kg7 N2g3 Rc6 Ng5 Rg6 Nxf7 Nxf7 
16   -0.11   00:00   3079K  Ra3 Bxe5 Qxe5 Nf4 Bg6 Nxg6 hxg6 Nd3 Qe3+ Kh1 Rxd3 Rxd3 Qxd3 Qxf6 Qf5 Qd8+ Qf8 
17   -0.13   00:00   3496K  Qh5 cxd6 Qxh4 Bxh4 Nd7 b5 Bd5 Bxd5+ cxd5 Rxd5 Ncb6 Rd3 Kf7 Bg3 Nc4 Kh2 Bxg3+ Nxg3 Nde5 Rd5 Rd8 Nd3 Nxd3 Rxd3 Rxd6 Rf3+ Rf6 
18   +0.12   00:00   6811K  Ra3 cxd6 Nxd6 Rxd6 Bxd6 Bxd6 Bd5 Bxd5+ Nxd5 Qd8+ Kg7 Ng3 Qe6 Qf8+ Kg6 Nce2 Ra1+ Kf2 Ra2 Bf4 Nxf4 Qxf4 Qf6 Qxf6+ Kxf6 Kf3 Ra3+ Kg4 
19   +0.03   00:01  12324K  Ne7 Rf1 Qh5 Rxf6 Qxh4 Bxh4 Ng6 Bg5 dxc5 bxc5 Bxf6 Bxf6 Bc4 Bc3 Nh4 Be4 Rf8 Ng3 Be6 Nd3 Bxh3 Be1 Nf3+ Kf2 Nxe1+ Kxe1 Bg4 
20   -0.06   00:01  13658K  Ne7 Rf1 Qh5 Rxf6 Qxh4 Bxh4 Ng6 Bg5 dxc5 bxc5 Bxf6 Bxf6 Bc4 Bc3 Re8 Bf3 Nh4 Bg4 Rf8 Ng3 Nf3+ Kf2 Nh2+ Ke3 Nxg4+ hxg4 Be6 Nd3 Bxg4 
21   -0.09   00:01  14098K  Ne7 Rf1 Qh5 Rxf6 Qxh4 Bxh4 Ng6 Bg5 dxc5 bxc5 Bxf6 Bxf6 Rf8 Bc3 Bc4 Be4 Nh4 Ng3 Bd5 Nd3 Bxe4 Nxe4 Rf3 Ndf2 Rf4 
22   -0.11   00:01  15932K  Ne7 Rf1 Qh5 Rxf6 Qxh4 Bxh4 Ng6 Bg5 dxc5 bxc5 Bxf6 Bxf6 Rf8 Bd4 Re8 Bc3 Bc4 Bf3 Rf8 Bg4 Nh4 Ng3 Nf3+ Kf2 Nh2+ Ke3 Nxg4+ hxg4 Be6 Ne4 
23   -0.13   00:02  23133K  Ne7 Rf1 Qh5 Rxf6 Qxh4 Bxh4 Ng6 Bg5 dxc5 bxc5 Bxf6 Bxf6 Bc4 Bd4 Rf8 Bf2 Rd8 Bg3 Rd1+ Kf2 Bd5 Bxd5+ Rxd5 Bd6 Kf7 Nc3 Rd4 N1e2 Rh4 Kg3 Rc4 Nd1 
24   -0.14   00:04  36801K  Ne7 Rf1 Qh5 Rxf6 Qxh4 Bxh4 Ng6 Bg5 dxc5 bxc5 Bxf6 Bxf6 Bc4 Bd4 Rf8 Bf2 Rd8 Bg3 Rd1+ Kf2 Bd5 Bxd5+ Rxd5 Nb3 Kg7 Na5 Rxc5 Nxb7 Rh5 Nd6 Rxh3 Nd4 Rh5 Nf3 Rd5 Ne4 Rd3 
25   -0.17   00:05  45840K  Ne7 Rf1 Qh5 Rxf6 Qxh4 Bxh4 Ng6 Bg5 Bxf6 Bxf6 dxc5 bxc5 Bc4 Bd4 Nh4 Nf4 Kf7 Kf2 Rd8 Be3 Nxg2 Kxg2 Kf6 Nce2 Rf8 Ng3 Ke5 Kf3 Bd5+ Kg4 Rg8+ Kh4 Rf8 Nd3+ Ke6 
26   -0.16   00:06  55107K  Ne7 Rf1 Qh5 Rxf6 Qxh4 Bxh4 Ng6 Bg5 Bxf6 Bxf6 dxc5 bxc5 Bc4 Bd4 Rf8 Bf2 Ra8 Bf3 Ra3 Kg2 Kf7 h4 Kf6 Be4 Bd5 Bxd5 cxd5 h5 Nf8 Bd4+ Kf7 Bb2 Ra5 Kf3 Ne6 Nd3 Nxc5 
27   -0.14   00:07  68475K  Ne7 Rf1 Qh5 Rxf6 Qxh4 Bxh4 Ng6 Bg5 Bxf6 Bxf6 dxc5 bxc5 Bc4 Bd4 Nh4 Nf4 Kf7 Bb2 Rg8 Kf2 Nxg2 Nxg2 Rd8 Ke3 Re8+ Kd2 Rg8 Ne3 Be6 Ne2 Rg5 Bd4 Bxh3 Nc4 Bg4 Nd6+ Kg8 
28   -0.16   00:08  76885K  Ne7 Rf1 Qh5 Rxf6 Qxh4 Bxh4 Ng6 Bg5 Bxf6 Bxf6 dxc5 bxc5 Bc4 Bd4 Nh4 Nf4 Kf7 Kf2 Rd8 Bc3 Nxg2 Nxg2 Ke6 Ne3 Rf8+ Kg3 Bd5 Kg4 Be4 Nb3 Bd3 Nd2 Rg8+ Kh4 Rf8 Kh5 Rg8 
29   -0.16   00:10  97016K  Ne7 Rf1 Qh5 Rxf6 Qxh4 Bxh4 Ng6 Bg5 Bxf6 Bxf6 dxc5 bxc5 Bc4 Bd4 Rf8 Be3 Re8 Kf2 Rf8+ Ke1 Nh4 Be4 Re8 Ng3 Nf5 Nxf5 Rxe4 Kf2 Be6 Nd6 Ra4 Nxb7 Bxh3 Nd6 h5 
30   -0.13   00:15 158918K  Ne7 Rf1 Qh5 Rxf6 Qxh4 Bxh4 Ng6 Bg5 Bxf6 Bxf6 dxc5 bxc5 Be6 Kh2 Bd5 Bxd5+ cxd5 Kg3 Ra3+ Nc3 Kf7 Bd4 Nf8 Kf4 Ne6+ Ke5 Nxc5 Nb5 Nd7+ Kd6 Ra5 Kxd7 Rxb5 Kd6 Rb4 Ne2 Rc4 Ke5 b5 Nf4 b4 Kxd5 Rc2 Nd3 b3 Ne5+ Kg8 
31   -0.13   00:18 186032K  Ne7 Rf1 Qh5 Rxf6 Qxh4 Bxh4 Ng6 Bg5 Bxf6 Bxf6 dxc5 bxc5 Bc4 Bd4 Nh4 Nf4 Kf7 Kf2 Rd8 Bc3 Nxg2 Nxg2 Rd1 Ne2 Bxe2 Kxe2 Rd5 Bb4 Rd4 Be1 Ra4 Ne3 Ra1 Kf2 Rc1 Bb4 Ke6 Kf3 Kf7 Ke4 Rh1 
32   -0.00   00:20 209985K  Ne7 Rf1 Qh5 Rxf6 Qxh4 Bxh4 Ng6 Bg5 Bxf6 Bxf6 dxc5 bxc5 Bc4 Bd4 Nh4 Nf4 Kf7 Kf2 Rd8 Bc3 Nxg2 Nxg2 Rd1 Ne2 Bxe2 Kxe2 Rd5 Bb4 Rd4 Be1 Ra4 Ne3 Ra1 Kf2 h5 Bc3 Ra4 Be5 Ke6 
33   +0.00   00:25 261244K  Ne7 Rf1 Qh5 Rxf6 Qxh4 Bxh4 Ng6 Bg5 Bxf6 Bxf6 dxc5 bxc5 Bc4 Bd4 Nh4 Nf4 Kf7 Kf2 Rd8 Bc3 Nxg2 Nxg2 Rd1 Ne2 Bxe2 Kxe2 Rd5 Bb4 Rd4 Be1 Ra4 Ne3 Ra1 Kf2 Rc1 Bb4 Rb1 Bc3 Rb3 Bd4 Rd3 Bh8 Ke6 Kf3 
34   -0.00   00:32 335248K  Ne7 Rf1 Qh5 Rxf6 Qxh4 Bxh4 Ng6 Bg5 Bxf6 Bxf6 dxc5 bxc5 Bc4 Bd4 Nh4 Nf4 Kf7 Kf2 Rd8 Bc3 Nxg2 Nxg2 Rd1 Ne2 Bxe2 Kxe2 Rd5 Bb4 Rd4 Be1 Ra4 Ne3 Ra1 Bf2 Ke6 Kd3 Rh1 h4 Rh2 Be1 Rh1 
35   -0.00   00:40 430429K  Ne7 Rf1 Qh5 Rxf6 Qxh4 Bxh4 Ng6 Bg5 Bxf6 Bxf6 dxc5 bxc5 Bc4 Bd4 Nh4 Nf4 Kf7 Kf2 Rd8 Bc3 Nxg2 Nxg2 Rd1 Ne2 Bxe2 Kxe2 Rd5 Bb4 Rd4 Be1 Rc4 Bf2 Ra4 Kf3 Ke6 Nf4+ Kf5 Nd3 Ke6 
36   +0.00   00:43 453971K  Ne7 Rf1 Qh5 Rxf6 Qxh4 Bxh4 Ng6 Bg5 Bxf6 Bxf6 dxc5 bxc5 Bc4 Bd4 Nh4 Nf4 Kf7 Kf2 Rd8 Nce2 Nxg2 Kxg2 Bxe2 Nxe2 Ke6 Kf3 Kd5 Nf4+ Kc4 Bf2 Re8 Be3 Re5 Kf2 Re4 Ng2 Re8 Kf3 Rd8 Ke2 Rg8 Nf4 Ra8 Kf3 Re8 
37   -0.00   00:54 577353K  Ne7 Rf1 Qh5 Rxf6 Qxh4 Bxh4 Ng6 Bg5 Bxf6 Bxf6 dxc5 bxc5 Bc4 Bd4 Nh4 Nf4 Kf7 Kf2 Rd8 Nce2 Nxg2 Kxg2 Bxe2 Nxe2 Ke6 Kf3 Kd5 Nf4+ Kc4 Bf2 Re8 Kg4 Rf8 Kf3 
38   -0.00   01:02 661586K  Ne7 Rf1 Qh5 Rxf6 Qxh4 Bxh4 Ng6 Bg5 Bxf6 Bxf6 dxc5 bxc5 Bc4 Bd4 Nh4 Nf4 Kf7 Kf2 Rd8 Nce2 Nxg2 Kxg2 Bxe2 Nxe2 Ke6 Kf3 Kd5 Nf4+ Kc4 Bf2 Re8 Kg4 Rf8 Kg5 Rf7 Kg4 
39   +0.00   01:39   1034M  Qh5 cxd6 Qxh4 Bxh4 Nd7 Bg3 Bxg3 Nxg3 Ra1 Ne4 Ncb6 Rf1 Bg6 Nb3 Rxf1+ Kxf1 Bxe4 Bxe4 Nc4 Nc5 Nde5 d7 Nxd7 Bxh7+ Kxh7 Nxd7 Kg6 Ke2 Kf5 Kd3 Ne5+ Nxe5 Kxe5 
40   +0.00   02:14   1359M  Qh5 cxd6 Qxh4 Bxh4 Nd7 Bg3 Bxg3 Nxg3 Ra1 Ne4 Ncb6 Rf1 Bg6 Nb3 Rxf1+ Kxf1 Bxe4 Bxe4 Nc4 Nc5 Nde5 d7 Nxd7 Bxh7+ Kxh7 Nxd7 Kg6 Ke2 Kf5 Kd3 Ne5+ Nxe5 Kxe5
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pilgrimdan
Posts: 405
Joined: Sat Jul 02, 2011 10:49 pm

Re: do programs avoid 56. ...dxc5

Post by pilgrimdan »

maybe so ... okay ... thanks Dann ... appreciate the input...
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Ras
Posts: 2487
Joined: Tue Aug 30, 2016 8:19 pm
Full name: Rasmus Althoff

Re: do programs avoid 56. ...dxc5

Post by Ras »

pilgrimdan wrote: ↑Sat Mar 02, 2019 3:23 am
[d]2n1n1k1/1p4bp/3p4/2P5/1P2qNQ1/6BP/r3NR1K/8 b - - 0 56
Even way below Stockfish, my engine at CCRL 2270 avoids taking the pawn. Note that the positive eval here is in favour of White because the GUI converts it that way.

Code: Select all

  2/03	 0:00 	+0.11 	1...Ne7 2.Qe6+ Qxe6 (1.955) 9
  3/05	 0:00 	+0.10 	1...Ra1 2.Qe6+ Qxe6 3.Nxe6 dxc5 (5.453) 24
  4/05	 0:00 	+0.14 	1...Ra1 2.Rf3 Ne7 3.Qe6+ Qxe6 (11.465) 51
  5/07	 0:00 	+0.14 	1...Ra1 2.Rf3 Ne7 3.Qe6+ Qxe6 4.Nxe6 dxc5 (51.979) 211
  6/07	 0:00 	+0.14 	1...Ra1 2.Rf3 Ne7 3.Qe6+ Qxe6 4.Nxe6 dxc5 (97.924) 360
  7/09	 0:00 	+0.30 	1...Na7 2.Nh5 Qxg4 3.hxg4 Bf8 4.Nc3 Rxf2+ 5.Bxf2 dxc5 (376.006) 870
  8/09	 0:00 	+0.31 	1...Na7 2.Qe6+ Qxe6 3.Nxe6 dxc5 4.Nxg7 Kxg7 5.Be5+ Kg6 (698.222) 1144
  9/11	 0:01 	+0.63 	1...Na7 2.Qd7 Ra1 3.Ng1 Nf6 4.Qd8+ Qe8 5.Qxe8+ Nxe8 6.Re2 Kf7 (2.800.977) 1595  TB:17
 10/11	 0:02 	+0.57 	1...Na7 2.Qd7 Ra1 3.Ng1 Nf6 4.Qd8+ Qe8 5.Qxe8+ Nxe8 6.Re2 Kf7 (4.683.311) 1659  TB:37
 11/13	 0:07 	+0.81 	1...Na7 2.cxd6 Nxd6 3.Qd7 Ra1 4.Ng1 Rxg1 5.Qd8+ Bf8 6.Kxg1 Qe1+ 7.Kh2 Qxb4 (13.771.124) 1807  TB:180
 12/13	 0:13 	+0.68 	1...Na7 2.Qd7 Ra1 3.Ng1 Nf6 4.Qxd6 Nc6 5.Bh4 Qb1 6.Rg2 Ne4 7.Qd5+ Kh8 (23.889.893) 1792  TB:527
 13/14	 0:33 	+0.90 	1...Na7 2.cxd6 Nxd6 3.Qd7 Ra1 4.Ng1 Rd1 5.Ne6 Qg6 6.Rg2 Qf7 7.Qd8+ Qe8 8.Bxd6 (60.986.818) 1847  TB:2.305
 14/15	 1:15 	+1.56 	1...Na7 2.cxd6 Nxd6 3.Qd7 Ra1 4.Ng1 Rd1 5.Ne6 Qg6 6.Rg2 Ne4 7.Qxd1 Qxe6 8.Qd8+ Bf8 (142.218.422) 1871  TB:22.582
 15/15	 2:16 	+1.63 	1...Na7 2.cxd6 Nxd6 3.Qd7 Ra1 4.Ng1 Rd1 5.Rg2 Kh8 6.Ne6 Bf6 7.Rf2 Qg6 8.Rxf6 Qxf6 (253.244.786) 1859  TB:49.107
Rasmus Althoff
https://www.ct800.net
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