Two test positions for <2400 engines

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JVMerlino
Posts: 1357
Joined: Wed Mar 08, 2006 10:15 pm
Location: San Francisco, California

Two test positions for <2400 engines

Post by JVMerlino »

In a recent game between Myrddin and Comet, Myrddin had this position:

[d]8/7k/pprNb1p1/6Pp/r1P1PK2/P1R5/8/1R6 w - - 0 48

Black is up a pawn, but is threatening to make a second outside passer. Surprisingly, the best move is 48.c5! Giving up a pawn to either open up the b-file or...well, after c5 we have this position:

[d]8/7k/pprNb1p1/2P3Pp/r3PK2/P1R5/8/1R6 b - - 0 48

Black has two choices. Play 48...bxc5 and allow 49.Rb7+ and a likely draw, or play 48...Rxc5. Either way Black gets a second passer, but with Rxc5 you also offer to trade down material, making the win even more likely....right?

WRONG. Engines must avoid Rxc5, because after 49.Rxc5 bxc5 50.Ke5! wins outright. A good test of horizon vs. passer bonus.

jm
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Dann Corbit
Posts: 12541
Joined: Wed Mar 08, 2006 8:57 pm
Location: Redmond, WA USA

Re: Two test positions for <2400 engines

Post by Dann Corbit »

Bleeding edge Stockfish said:

Code: Select all

Searching: 8/7k/pprNb1p1/2P3Pp/r3PK2/P1R5/8/1R6 b - - 0 1
infinite: 0 time: 0 increment: 0 moves to go: 0

 1   +0.50   00:00   18978  Rxc5 Rxc5 bxc5 
 2   +0.20   00:00   85874  b5 Nb7 
 3   -0.16   00:00  145742  bxc5 Rb7+ Kg8 Ke5 Rd4 
 4   -0.29   00:00  223725  bxc5 Rb7+ Kg8 Ke5 Rd4 
 5   -0.10   00:00  299479  bxc5 Rb7+ Kg8 Ke5 Rd4 Rb8+ Kg7 
 6   -0.09   00:00  361189  bxc5 Rb7+ Kg8 Rb8+ Kg7 Nb7 Rb6 Rxc5 
 7   -0.17   00:00  409126  bxc5 Rb7+ Kg8 Rb8+ Kg7 Rd8 Kh7 Ke5 Bg4 
 8   -0.32   00:00  465533  bxc5 Rb7+ Kg8 Rb8+ Kh7 Ke5 Rd4 Nb7 Rd1 Rxc5 
 9   +0.00   00:00  547319  bxc5 Rb7+ Kg8 Rb8+ Kg7 Rd8 c4 e5 Rb6 Re8 Rb3 Re7+ Kf8 
10   -0.17   00:00  610847  bxc5 Rb7+ Kg8 Rb8+ Kg7 Ne8+ Kf7 Nf6 Bc8 Ra8 Ke7 Rf3 Ke6 Ra7 
11   -0.14   00:00  799674  bxc5 Rb7+ Kg8 Rb8+ Kg7 Nb7 Rb6 Rxc5 Rc4 Rxc4 Bxc4 Rc8 Rxb7 Rxc4 Rf7+ Ke5 Rb7 
12   -0.24   00:00  889642  bxc5 Rb7+ Kh8 Rb8+ Kg7 Ne8+ Kf7 Nf6 Bc8 Ra8 Rc7 Rb3 Ra5 Rb6 
13   -0.30   00:00  998367  bxc5 Rb7+ Kg8 Rb8+ Kg7 Ke5 Rd4 Ne8+ Kg8 Nf6+ Kg7 Rb7+ Bf7 Kf4 Rd8 Kg3 a5 Rf3 
14   -0.37   00:00   1116K  bxc5 Rb7+ Kg8 Rb8+ Kg7 Ke5 Rd4 Ne8+ Kg8 Nf6+ Kg7 Rb7+ Bf7 Rf3 Re6+ Kf4 c4 Rc3 Rd3 
15   -0.49   00:00   1444K  bxc5 Rb7+ Kh8 Rb8+ Bg8 Ke5 Rc7 Rb7 Rxb7 Nxb7 Kg7 Nxc5 Rc4 Rxc4 Bxc4 Kd4 Bf7 Nxa6 
16   -0.63   00:00   2063K  bxc5 Rb7+ Kh8 Rb8+ Bg8 Rd8 a5 Nb7 Kh7 Nxc5 Rc4 Rxc4 Bxc4 Nd7 Kg7 Ne5 Rc7 Rd6 Bf7 Ra6 h4 Kg4 h3 Kxh3 Rc3+ Kg4 Re3 Rxa5 Rxe4+ Kf3 
17   -1.20   00:00   4856K  bxc5 Rb7+ Kh8 Rb8+ Bg8 Rd8 Ra5 Ke5 Rc7 Kf6 Kh7 e5 c4 e6 Bxe6 Kxe6 Rxg5 Rxc4 Rxc4 Rd7+ Kg8 Nxc4 Rf5 Rd4 Kh7 Ne5 Kg7 Rd7+ Kh6 Rd5 h4 Nf7+ Kg7 Rxf5 
18   -1.39   00:00   5160K  bxc5 Rb7+ Kh8 Rb8+ Bg8 Rd8 c4 Ke5 Rc7 Kf6 Kh7 e5 Ra5 e6 Bxe6 Kxe6 Rxg5 Rxc4 Rxc4 Rd7+ Kg8 Nxc4 Rf5 Ne5 h4 
19   -1.57   00:00   6244K  bxc5 Rb7+ Kh8 Rb8+ Bg8 Rd8 c4 Ke5 Rc7 Kf6 Kh7 e5 Ra5 e6 Bxe6 Kxe6 Rxg5 Rxc4 Rgc5 Rxc5 Rxc5 Rd7+ Kh6 Nf7+ Kh7 Ne5+ Kh6 Kf6 h4 Rd8 Kh7 Rb8 
20   -1.52   00:00   7277K  bxc5 Rb7+ Kh8 Rb8+ Bg8 Rd8 c4 Ke5 Rc7 Kf6 Kh7 e5 Ra5 e6 Bxe6 Kxe6 Rxg5 Rxc4 Rgc5 Rd7+ Rxd7 Rxc5 Rd8 Rc7+ Kg8 Nf7 Rf8 Ne5 Rf2 Nd7 Kh8 Rb7 Kg7 Ne5+ Kh6 
21   -1.81   00:01  10727K  bxc5 Rb7+ Kh8 Rb8+ Bg8 Rd8 Ra5 Ke5 Rc7 Kf6 Rg7 e5 Ra4 Rf3 Kh7 e6 Rd4 Ke5 Re7 Rf6 Rg4 Nf7 Rd4 Rxd4 cxd4 Kd6 
22   -1.53   00:02  19201K  bxc5 Rb7+ Kh8 Rb8+ Bg8 Rd8 c4 Ke5 Rc7 Kf6 Kh7 e5 Ra5 e6 Bxe6 Kxe6 Rxg5 Rxc4 Rxc4 Rd7+ Kg8 Nxc4 h4 Kf6 Rg2 Rg7+ Kh8 Ra7 h3 Ne5 Kg8 Rg7+ Kf8 Nxg6+ Ke8 Rh7 h2 Ne5 
23   -1.02   00:03  28892K  bxc5 Rb7+ Kh8 Rb8+ Bg8 Rd8 c4 Ke5 Rc7 Kf6 Kh7 e5 Ra5 e6 Bxe6 Kxe6 Rxg5 Rxc4 Rxc4 Rd7+ Kg8 Nxc4 h4 Kf6 Rg2 Rg7+ Kh8 Ra7 h3 Ne5 Kg8 Rg7+ Kf8 Nxg6+ Ke8 Rh7 h2 Ne5 Rf2+ Ke6 Kf8 Ng4 Ra2 Nf6 Re2+ Kd6 Rf2 Nd7+ Kg8 Rh4 Ra2 Kc6 Kf7 Ne5+ Kf6 Ng4+ Kf5 
24   -2.06   00:05  51161K  bxc5 Rb7+ Kh8 Rb8+ Bg8 Rd8 a5 Kg3 Kh7 Rd7+ Kh8 Rf3 Rxd6 Rxd6 Rxe4 Rxg6 Kh7 Rh6+ Kg7 Rf5 Re3+ Kf4 Rxa3 Rxc5 Bf7 Rc7 Ra1 Ra7 Rf1+ Ke4 a4 Kd4 a3 Rxh5 
25   -2.14   00:06  59598K  bxc5 Rb7+ Kh8 Rb8+ Bg8 Rd8 c4 Ke5 Rc7 Kf6 Kh7 e5 Ra5 e6 Bxe6 Kxe6 Rxg5 Rxc4 Rxc4 Rd7+ Kg8 Nxc4 Rg2 Kf6 h4 Rd8+ Kh7 Rd4 Rf2+ Kg5 h3 Rh4+ Kg7 Rxh3 Rf5+ Kg4 Rd5 Rf3 
26   -2.17   00:07  73151K  bxc5 Rb7+ Kh8 Rb8+ Bg8 Rd8 c4 Ke5 Rc7 Kf6 Kh7 e5 Ra5 e6 Bxe6 Kxe6 Rxg5 Rxc4 Rxc4 Rd7+ Kg8 Nxc4 Rg2 Kf6 h4 Rd8+ Kh7 Rd4 Rf2+ Kg5 h3 Rh4+ Kg7 Rxh3 Rf5+ Kg4 Rd5 Rf3 a5 Rf4 a4 Re4 Kf6 Nb2 Rg5+ Kf4 Ra5 Ke3 Rh5 
27   -1.76   00:08  76253K  bxc5 Rb7+ Kh8 Rb8+ Bg8 Rd8 c4 Ke5 Rc7 Kf6 Kh7 e5 Ra5 e6 Bxe6 Kxe6 Rxg5 Rxc4 Rxc4 Rd7+ Kg8 Nxc4 Rg3 Kf6 h4 Rg7+ Kf8 Rh7 Rf3+ Kxg6 h3 a4 Kg8 Rh4 Rg3+ Kf5 Kg7 Ne5 Rb3 Rg4+ Kf8 Rf4 Kg8 Ng4 Kg7 Rf1 Rg3 
28   -1.66   00:09  92164K  bxc5 Rb7+ Kh8 Rb8+ Bg8 Rd8 c4 Ke5 Rc7 Kf6 Kh7 e5 Ra5 e6 Bxe6 Kxe6 Rxg5 Rxc4 Rxc4 Rd7+ Kg8 Nxc4 Rg3 Kf6 h4 Rg7+ Kf8 Rh7 Rf3+ Kxg6 h3 a4 Kg8 Rh4 Rb3 Ne5 a5 Nd7 Rg3+ Kf6 Rf3+ Ke6 Ra3 Nc5 Rf3 Kd5 Kf7 
29   -1.41   00:11 114832K  bxc5 Rb7+ Kh8 Rb8+ Bg8 Rd8 c4 Ke5 Rc7 Kf6 Kh7 e5 Ra5 e6 Bxe6 Kxe6 Rxg5 Rxc4 Rxc4 Rd7+ Kg8 Nxc4 Rg3 Kf6 h4 Rg7+ Kf8 Rh7 Rf3+ Kxg6 h3 a4 Kg8 Rh4 Rb3 Ne5 a5 Nd7 Rg3+ Kf6 Rf3+ Ke6 Re3+ Kd6 Kg7 Kc5 Kg6 Nb6 Kg5 Rh8 
30   -1.49   00:14 141398K  bxc5 Rb7+ Kh8 Rb8+ Bg8 Rd8 c4 Ke5 Rc7 Kf6 Kh7 e5 Ra5 e6 Bxe6 Kxe6 Rxg5 Rxc4 Rxc4 Rd7+ Kg8 Nxc4 Rg3 Kf6 h4 Rg7+ Kf8 Rh7 Rf3+ Kxg6 h3 a4 Kg8 Rh4 Rg3+ Kf6 Rf3+ Ke6 Kg7 Rg4+ Kf8 Ne5 Re3 Kf6 Re2 Nd7+ Ke8 Nc5 Rf2+ Ke6 Re2+ Kd5 h2 Rh4 Ra2 Kc6 Ke7 Kb6 Kd6 Nb7+ Ke5 a5 Kf5 Kxa6 Kg5 Rh8 
31   -1.23   00:17 171261K  bxc5 Rb7+ Kh8 Rb8+ Bg8 Rd8 c4 Ke5 Rc7 Kf6 Kh7 e5 Ra5 e6 Bxe6 Kxe6 Rxg5 Rxc4 Rxc4 Rd7+ Kg8 Nxc4 Rg3 Kf6 h4 Rg7+ Kf8 Rh7 Rf3+ Kxg6 h3 a4 Kg8 Rh5 Rc3 Ne5 a5 Kf6 Rg3 Rh4 Rb3 Ng6 Rf3+ Ke6 Kg7 Ne5 Re3 Rg4+ Kf8 Kf6 Rb3 Nd7+ Ke8 Nc5 Rb6+ Ne6 Kd7 Rg7+ Kd6 Rh7 
32   -2.05   00:29 299777K  bxc5 Rb7+ Kh8 Rb8+ Bg8 Rd8 c4 Ke5 Rc7 Kf6 Kh7 e5 Ra5 e6 Bxe6 Kxe6 Rxg5 Rxc4 Rxc4 Rd7+ Kg8 Nxc4 Rg3 Kf6 h4 Rg7+ Kf8 Rh7 Rf3+ Kxg6 h3 a4 Kg8 Rh4 Rg3+ Kf6 Rb3 Nd6 a5 Ne4 Rb4 Kg6 Kf8 Rh8+ Ke7 Nc3 Rc4 Rxh3 Kd7 Kf5 Kc6 Ke5 Kc5 Rg3 Rh4 Ke6 Rh6+ Kd7 Kb4 Kc7 Kb3 Kb7 Re6 Ka7 Re5 
33   -1.28   00:33 350940K  bxc5 Rb7+ Kh8 Rb8+ Bg8 Rd8 c4 Ke5 Rc7 Kf6 Kh7 e5 Ra5 e6 Bxe6 Kxe6 Rxg5 Rxc4 Rxc4 Rd7+ Kg8 Nxc4 h4 Kf6 Rg3 Rg7+ Kf8 Rh7 Rf3+ Kxg6 h3 a4 Kg8 Rh4 Rb3 a5 Rb4 Rd4 Kf8 Kf6 Kg8 Rd8+ Kh7 Rd7+ Kg8 Kg6 Kf8 Rf7+ Kg8 Ra7 Kf8 Kf6 Kg8 Ne5 Rf4+ Kg6 h2 Rg7+ Kf8 Rh7 Rf2 Ng4 Rc2 Kf5 Rc5+ Ke6 Rc6+ Kd5 Rg6 Ne5 Rg2 Kc6 Rb2 Rh4 Ke7 Rh6 Kf8 Ng4 Rb5 Rh8+ Kf7 
34   -1.37   00:36 375120K  bxc5 Rb7+ Kh8 Rb8+ Bg8 Rd8 c4 Ke5 Rc7 Kf6 Kh7 e5 Ra5 e6 Bxe6 Kxe6 Rxg5 Rxc4 Rxc4 Rd7+ Kg8 Nxc4 h4 Kf6 Rg3 Rg7+ Kf8 Rh7 Rf3+ Kxg6 h3 a4 Kg8 Rh4 Rb3 a5 Rb4 Rd4 Kf8 Kf6 Kg8 Rd8+ Kh7 Rd7+ Kg8 Kg6 Kf8 Rf7+ Kg8 Rc7 Kf8 Nd6 h2 Nf5 Rg4+ Kf6 
35   -1.88   00:49 522194K  bxc5 Rb7+ Kh8 Rb8+ Bg8 Rd8 c4 Ke5 Rc7 Kf6 Kh7 e5 Ra5 e6 Bxe6 Kxe6 Rxg5 Rxc4 Rxc4 Rd7+ Kg8 Nxc4 h4 Kf6 Rg3 Rg7+ Kf8 Rh7 Rf3+ Kxg6 h3 a4 Kg8 Rh4 Rc3 Kf6 a5 Nxa5 Rf3+ Ke6 Ra3 Nb7 Kg7 Kf5 h2 Nc5 Ra2 Kf4 Rc2 
36   -1.99   01:01 652658K  bxc5 Rb7+ Kh8 Rb8+ Bg8 Rd8 c4 Ke5 Rc7 Kf6 Kh7 e5 Ra5 e6 Bxe6 Kxe6 Rxg5 Rxc4 Rxc4 Rd7+ Kg8 Nxc4 h4 Kf6 Rg3 Rg7+ Kf8 Rh7 Rf3+ Kxg6 h3 a4 Kg8 Rh4 Rg3+ Kf6 a5 Nd6 Rb3 Ne4 Rb4 Kg6 Kf8 Rh8+ Ke7 Nc3 Rg4+ Kf5 Rg3 Ne4 Ra3 Rh7+ Kf8 Ke6 Re3 Kd5 Ra3 Nc5 Kg8 Rh4 Kf7 Kc4 Kf6 
37   -1.91   01:04 694029K  bxc5 Rb7+ Kh8 Rb8+ Bg8 Rd8 c4 Ke5 Rc7 Kf6 Kh7 e5 Ra5 e6 Bxe6 Kxe6 Rxg5 Rxc4 Rxc4 Rd7+ Kg8 Nxc4 h4 Kf6 Rg3 Rg7+ Kf8 Rh7 Rf3+ Kxg6 h3 a4 Kg8 Rh4 Rg3+ Kf6 a5 Nd6 Rb3 Ne4 Rb4 Kg6 Kf8 Rh8+ Ke7 Nc3 Rg4+ Kf5 Rg3 Ne4 Ra3 Rh7+ Kf8 Kf6 Rf3+ Kg6 Ra3 Nc5 Kg8 Rh4 Kf8 Kf6 Rf3+ Ke6 Kg7 Ke7 Rf7+ Kd6 
Nodes: 694086331
Nodes/second: 10711539
Best move: bxc5
Ponder move: Rb7+

Searching: 8/7k/pprNb1p1/6Pp/r1P1PK2/P1R5/8/1R6 w - - 0 1
infinite: 0 time: 0 increment: 0 moves to go: 0

 1   +0.06   00:00   25766  e5 
 2   +0.18   00:00   85041  e5 Kg7 Rb4 
 3   +0.00   00:00  138461  c5 bxc5 Rb7+ Kg8 
 4   +0.10   00:00  191903  c5 Rxc5 Rxc5 bxc5 Rb7+ Kg8 Ke5 Bg4 
 5   +0.17   00:00  253454  c5 bxc5 Ne8 Bc8 Nf6+ Kg7 
 6   +0.19   00:00  299821  c5 bxc5 Ne8 Bc8 Rd1 Be6 
 7   +0.28   00:00  351880  c5 bxc5 Rb7+ Kg8 Rb8+ Kh7 Ne8 Bd5 Re3 
 8   +0.11   00:00  416031  e5 Bxc4 Rb4 Rxb4 axb4 b5 Re3 Bg8 
 9   +0.09   00:00  471789  c5 bxc5 Ne8 Rd4 Nf6+ Kg7 a4 Rxa4 Rb7+ Kf8 Rb8+ Bc8 
10   +0.00   00:00  529324  c5 bxc5 Rb7+ Kh8 Rb8+ Kg7 Ne8+ Kf7 Nf6 Rd4 Rh8 c4 Rb8 Ke7 
11   +0.00   00:00  600558  c5 bxc5 Rb7+ Kh8 Rb8+ Kh7 
12   +0.00   00:00  680098  c5 bxc5 Rb7+ Kh8 Rb8+ Kh7 
13   +0.00   00:00  773612  c5 bxc5 Ne8 Rd4 Nf6+ Kg7 Rb7+ Bf7 Ra7 Rd1 Nd5 c4 Nf6 Rd8 
14   +0.10   00:00  845275  c5 bxc5 Rb7+ Kg8 Rb8+ Kh7 Nb7 Bg4 Nxc5 Ra5 Na4 Rxc3 Nxc3 Rxa3 
15   +0.12   00:00  948680  c5 bxc5 Rb7+ Kg8 Rb8+ Kh7 Nb7 Bg4 Nxc5 Ra5 Na4 Rxc3 Nxc3 Be6 Re8 Bh3 
16   +0.06   00:00   1426K  c5 bxc5 Rb7+ Kg8 Ke5 Rd4 Rb8+ Kg7 Nb7 Bf7 Rxc5 Rc4 Rxc4 Rxc4 Nd6 Rc7 Rb6 a5 Rb7 Rxb7 
17   +0.13   00:00   1668K  c5 bxc5 Rb7+ Kg8 Rb8+ Kh7 Nb7 Bg4 Nxc5 Ra5 Na4 Rxc3 Nxc3 Rxa3 Nd5 a5 Ra8 Kg7 Ke5 Bf3 Ra7+ Kg8 Nf4 Re3 Nxg6 
18   +0.18   00:00   1769K  c5 bxc5 Rb7+ Kg8 Rb8+ Kh7 Nb7 Rb6 Rxc5 Rc4 Rxc4 Bxc4 Rc8 Rxb7 Rxc4 Kg7 Rc6 a5 
19   +0.29   00:00   3218K  c5 bxc5 Rb7+ Kg8 Rb8+ Kh7 Ke5 Rd4 Nb7 Bg4 Rxc5 Rc4 Kd5 R6xc5+ Nxc5 Rc1 Rb7+ Kh8 Rb6 Kg7 Ne6+ Bxe6+ Kxe6 Rc3 Rb7+ Kf8 
20   +0.77   00:00   7128K  c5 bxc5 Rb7+ Kh8 Rb8+ Bg8 Rd8 Kh7 Ne8 Be6 Nf6+ Kg7 Ra8 Bf7 Ra7 Rc8 Nd7 Ra5 Rf3 c4 Ne5 Rf8 Nxc4 Ra4 Ne5 Kg8 Kg3 
21   +0.72   00:00   8139K  c5 bxc5 Rb7+ Kh8 Rb8+ Bg8 Ne8 Bf7 Nf6+ Kg7 Rb7 Ra5 Nd7 Rb5 Ra7 Rc8 Ne5 Rf8 Rc7 Kg8 Nd7 Rd8 Nf6+ Kf8 R3xc5 Rxc5 Rxc5 Kg7 Rc7 h4 e5 
22   +1.51   00:01  15279K  c5 bxc5 Rb7+ Kh8 Rb8+ Kg7 Ke5 Rxd6 Kxd6 Rxe4 Rb7+ Kg8 Re7 Bf5 Rxe4 Bxe4 Kxc5 Kf7 Rc4 Bd3 Rd4 Bf5 Kd6 Kg8 Rf4 Kf7 Kd5 Ke7 
23   +1.59   00:01  20902K  c5 bxc5 Rb7+ Kh8 Rb8+ Bg8 Rd8 c4 Ke5 Rc7 Kf6 Kh7 e5 Ra5 e6 Bxe6 Kxe6 Rxg5 Rxc4 Rxc4 Rd7+ Kg8 Nxc4 Rg2 Kf6 h4 Ne5 h3 Rg7+ Kf8 Nxg6+ Ke8 Rh7 h2 Ne5 Kd8 
24   +1.21   00:02  29573K  c5 bxc5 Rb7+ Kh8 Rb8+ Bg8 Rd8 c4 Ke5 Rc7 Kf6 Kh7 e5 Ra5 e6 Bxe6 Kxe6 Rxg5 Rxc4 Rxc4 Rd7+ Kg8 Nxc4 Rc5 Rd4 Rc6+ Kd5 Rc8 Nd6 Rc3 a4 Kh7 Ne4 Ra3 Ke5 Kg7 Kf4 Kh6 
25   +1.53   00:02  36813K  c5 bxc5 Rb7+ Kh8 Rb8+ Bg8 Rd8 Ra5 Ke5 Rc7 Kf6 Kh7 e5 c4 e6 Bxe6 Kxe6 Rxg5 Rxc4 Rxc4 Rd7+ Kg8 Nxc4 h4 Kf6 Rg2 Ne3 Rg1 Nd5 h3 Ne7+ Kh7 Nxg6+ Kh6 Nh4 Rf1+ Nf5+ Kh5 Rg7 
26   +1.62   00:05  67384K  c5 bxc5 Rb7+ Kh8 Rb8+ Bg8 Rd8 c4 Ke5 Rc7 Kf6 Kh7 e5 Ra5 e6 Bxe6 Kxe6 Rxg5 Rxc4 Rxc4 Rd7+ Kg8 Nxc4 h4 Kf6 Rg3 Rg7+ Kf8 Rh7 Rf3+ Kxg6 h3 a4 Rg3+ Kf5 Rf3+ Kg5 Kg8 Rh4 Kg7 Nb6 Ra3 Kf5 Rf3+ Kg4 Ra3 Kg5 Kf7 Kf5 
27   +1.98   00:06  82406K  c5 bxc5 Rb7+ Kh8 Rb8+ Bg8 Rd8 c4 Ke5 Rc7 Kf6 Kh7 e5 Ra5 e6 Bxe6 Kxe6 Rxg5 Rxc4 Rxc4 Rd7+ Kg8 Nxc4 h4 Kf6 Rg1 Ne5 Rf1+ Kxg6 Rg1+ Kf6 Rf1+ Ke6 Rg1 Rd4 h3 Rh4 Rh1 a4 Kg7 Kf5 h2 
28   +1.54   00:08 107667K  c5 bxc5 Rb7+ Kh8 Rb8+ Bg8 Rd8 c4 Ke5 Rc7 Kf6 Kh7 e5 Ra5 e6 Bxe6 Kxe6 Rxg5 Rxc4 Rxc4 Rd7+ Kg8 Nxc4 h4 Kf6 Rg3 Rg7+ Kf8 Rh7 Rf3+ Kxg6 h3 a4 Kg8 Rh5 Rc3 Ne5 a5 Ng4 Rg3 Kf5 Kg7 Rg5+ Kf8 Kf4 Rg2 Rf5+ Kg7 Kf3 
29   +1.39   00:10 132927K  c5 bxc5 Rb7+ Kh8 Rb8+ Bg8 Rd8 c4 Ke5 Rc7 Kf6 Kh7 e5 Ra5 e6 Bxe6 Kxe6 Rxg5 Rxc4 Rxc4 Rd7+ Kg8 Nxc4 h4 Kf6 Rg3 Rg7+ Kf8 Rh7 Rf3+ Kxg6 h3 a4 Kg8 Rh4 Rb3 a5 Rb4 Rd4 Kf8 Kf6 Kg8 Rg4+ Kh8 Rh4+ Kg8 Ke5 Kg7 Ke6 Kf8 Kd5 Rb3 Ke5 Kg7 Kf4 h2 Ke4 
30   +1.36   00:12 148847K  c5 bxc5 Rb7+ Kh8 Rb8+ Bg8 Rd8 c4 Ke5 Rc7 Kf6 Kh7 e5 Ra5 e6 Bxe6 Kxe6 Rxg5 Rxc4 Rxc4 Rd7+ Kg8 Nxc4 Rg3 Kf6 h4 Rg7+ Kf8 Rh7 Rf3+ Kxg6 h3 a4 Kg8 Rh4 Rb3 a5 Rb4 Rd4 Kf8 Kf6 Kg8 Rg4+ Kf8 Rh4 Kg8 Ke5 Kg7 Ke6 Kg8 Kd5 Rb3 Kc5 Kg7 
31   +1.91   00:15 186517K  c5 bxc5 Rb7+ Kh8 Rb8+ Bg8 Rd8 c4 Ke5 Rc7 Kf6 Kh7 e5 Ra5 e6 Bxe6 Kxe6 Rxg5 Rxc4 Rxc4 Rd7+ Kg8 Nxc4 Rg3 Kf6 h4 Rg7+ Kf8 Rh7 Rf3+ Kxg6 h3 a4 Kg8 Rh4 Rb3 a5 Rb4 Rd4 Kf8 Kf6 Kg8 Rd8+ Kh7 
32   +1.99   00:21 258122K  c5 bxc5 Rb7+ Kh8 Rb8+ Bg8 Rd8 c4 Ke5 Rc7 Kf6 Kh7 e5 Ra5 e6 Bxe6 Kxe6 Rxg5 Rxc4 Rxc4 Rd7+ Kg8 Nxc4 h4 Kf6 Rg3 Rg7+ Kf8 Rh7 Rf3+ Kxg6 h3 a4 Rc3 Ne5 Rg3+ Kf5 Kg8 Rh4 a5 Nc6 Rf3+ Ke5 Kg7 Nxa5 Ra3 Nb7 Kg6 Nc5 Kg5 Rh7 Kg4 
33   +1.80   00:23 284354K  c5 bxc5 Rb7+ Kh8 Rb8+ Bg8 Rd8 c4 Ke5 Rc7 Kf6 Kh7 e5 Ra5 e6 Bxe6 Kxe6 Rxg5 Rxc4 Rxc4 Rd7+ Kg8 Nxc4 h4 Kf6 Rg3 Rg7+ Kf8 Rh7 Rf3+ Kxg6 h3 a4 Kg8 Rh4 Rg3+ Kf6 Rb3 Nd6 a5 Ne4 Rb4 Kg6 Kf8 Rh8+ Ke7 Nc3 Kd6 Rxh3 Kc5 Rf3 Kc4 Nd1 Kc5 Ra3 Re4 Kf5 
34   +1.76   00:26 321602K  c5 bxc5 Rb7+ Kh8 Rb8+ Bg8 Rd8 c4 Ke5 Rc7 Kf6 Kh7 e5 Ra5 e6 Bxe6 Kxe6 Rxg5 Rxc4 Rxc4 Rd7+ Kg8 Nxc4 h4 Kf6 Rg3 Rg7+ Kf8 Rh7 Rf3+ Kxg6 h3 a4 Kg8 Rh4 Rg3+ Kf6 Rb3 Rh5 Rf3+ Ke6 a5 Kd5 Kg7 Kc5 Kg6 Rh8 Kg5 Kb5 Kf4 Nxa5 Kg3 Nc6 h2 a5 
35   +2.17   00:35 419566K  c5 bxc5 Rb7+ Kh8 Rb8+ Bg8 Rd8 c4 Ke5 Rc7 Kf6 Kh7 e5 Ra5 e6 Bxe6 Kxe6 Rxg5 Rxc4 Rxc4 Rd7+ Kg8 Nxc4 h4 Kf6 Rg3 Rg7+ Kf8 Rh7 Rf3+ Kxg6 h3 a4 Kg8 Rh4 Rb3 a5 Rb4 Rd4 Kf8 Kf6 Kg8 Rd8+ Kh7 Rd7+ Kg8 Ne5 Rf4+ Kg6 h2 Rg7+ Kf8 Rh7 Rf2 Ng4 Ra2 Kf6 
36   +2.28   00:45 533189K  c5 bxc5 Rb7+ Kh8 Rb8+ Bg8 Rd8 c4 Ke5 Rc7 Kf6 Kh7 e5 Ra5 e6 Bxe6 Kxe6 Rxg5 Rxc4 Rxc4 Rd7+ Kg8 Nxc4 Rg3 Kf6 h4 Rg7+ Kf8 Rh7 Rf3+ Kxg6 h3 a4 Kg8 Rh4 Rg3+ Kf6 Rb3 Nd6 Rc3 Nf5 Rc6+ Ke7 Rc7+ Ke6 Rc6+ Nd6 Rc3 Kf6 Rb3 a5 Rc3 Rh5 Rc6 Ke6 Rc3 Nf5 Rc6+ Ke5 Rc3 Ne7+ Kg7 
37   +2.10   00:54 635339K  c5 bxc5 Rb7+ Kh8 Rb8+ Bg8 Rd8 c4 Ke5 Rc7 Kf6 Kh7 e5 Ra5 e6 Bxe6 Kxe6 Rxg5 Rxc4 Rxc4 Rd7+ Kg8 Nxc4 Rg3 Kf6 h4 Rg7+ Kf8 Rh7 Rf3+ Kxg6 h3 a4 Kg8 Rh4 Rc3 Kf6 a5 Nxa5 Rf3+ Ke6 Ra3 Nc6 Kg7 a5 Kg6 Kd5 Kg5 Rh8 Kf4 Kc5 Kg3 
Nodes: 635470334
Nodes/second: 11724761
Best move: c5
Ponder move: bxc5
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JVMerlino
Posts: 1357
Joined: Wed Mar 08, 2006 10:15 pm
Location: San Francisco, California

Re: Two test positions for <2400 engines

Post by JVMerlino »

So it appears that the best moves are correct, but replying with bxc5 might not be able to prevent White winning (although it's clearly better than Rxc5). Thanks, Dann!
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