Not logged inRybka Chess Community Forum
Up Topic The Rybka Lounge / Test Positions / Test position
- - By ghost (**) Date 2010-09-10 07:32
Black played a3?

White to move.

Which engine will find Rh3!

r4r1k/1p1n1ppp/1qb1p3/2b1P3/2B3Q1/p1NR4/PPP3PP/1KB1R3 w - -
Parent - - By Mark (****) [us] Date 2010-09-10 12:10
Amazingly enough, the chess program I started on in mid-July gets this!  It doesn't see any big advantage, though.
No hash or quies search yet (I do extend one ply for captures), and basically only piece square tables and material for eval.
    +---+---+---+---+---+---+---+---+
 8  |*R | . |   | . |   |*R |   |*K |
    +---+---+---+---+---+---+---+---+
 7  | . |*P | . |*N | . |*P |*P |*P |   ep_square = 0
    +---+---+---+---+---+---+---+---+   castle_wk = 0
 6  |   |*Q |*B | . |*P | . |   | . |   castle_wq = 0
    +---+---+---+---+---+---+---+---+   castle_bk = 0
 5  | . |   |*B |   | P |   | . |   |   castle_bq = 0
    +---+---+---+---+---+---+---+---+
 4  |   | . | B | . |   | . | Q | . |
    +---+---+---+---+---+---+---+---+
 3  |*P |   | N | R | . |   | . |   |   White to move
    +---+---+---+---+---+---+---+---+
 2  | P | P | P | . |   | . | P | P |
    +---+---+---+---+---+---+---+---+
 1  | . | K | B |   | R |   | . |   |
    +---+---+---+---+---+---+---+---+

      a   b   c   d   e   f   g   h

depth      nodes     time eval  pc
----------------------------------------------------------------------------
   1         125     0.00   13 Bc1e3 
   2         814     0.00   78 Bc4e6 Kh8g8 
   3       59862     0.08    9 Rd3g3  g7g5 Bc1e3 
   4      241107     0.32    3 Qg4d1 Nd7b8 Nc3e4 Nb8d7 
   5     8487098    10.93   -2  b2b3  f7f6  e5f6 Nd7f6 Bc1e3 
   6    37390388    48.09   12 Bc4b3 Bc5f2 Re1e2  a3b2 Rd3d7 Bc6d7 
   7   871535004  1124.32  -13 Rd3h3 Kh8g8 Bc4d3  h7h5 Qg4h5  a3b2 Bc1e3 
Parent - By Akbarfan (***) Date 2010-09-10 19:25
Rh3 is a winner (or blacks a3 a loser :wink:) and should be evaluated with nearly +2.00,

and after black play e.g. Rfe8, then Rf1 brings more than +4.00
Parent - By dcorbit (***) [us] Date 2010-09-11 04:58
Hiarcs, Spark
However, it appears that b3 is approximately as good (which is the move that all the others select).
See (for instance):

Analysis from Q:\rh3.epd  
09/10/2010 9:24:13 PM Level: 20 Seconds
Analyzing engine: Spark-0.4-win64-mp

1) Rh3;                
    Searching move: Rd3-h3
    Best move (Spark-0.4-win64-mp): Rd3-h3
    identical moves! Found in: 00:17
     2/1  00:00           161  0  +0.01  b2b3 Qb6b4
     2/1  00:00           258  0  +0.04  Rd3g3 g7g6
     3/4  00:00           700  0  +0.15  Rd3g3 Rf8g8 b2b3
     4/5  00:00         1.787  0  -0.02  Rd3g3 Rf8g8 b2b3 Bc5d4
     5/6  00:00         3.808  0  -0.12  Rd3g3 Rf8g8 b2b3 Qb6b4 Bc1f4
     6/7  00:00        25.452  0  -0.18  Rd3g3 Rf8g8 b2b3 Qb6b4 Rg3h3 h7h6
     7/9  00:00        58.756  0  -0.07  Rd3g3 g7g6 b2b3 Bc5b4 Bc1h6 Qb6f2 Re1f1 Nd7xe5 Rf1xf2 Ne5xg4 Bh6xf8 Ra8xf8 Rg3xg4 Bb4xc3
     8/14  00:00       214.050  0  -0.43  Rd3g3 g7g6 b2b3 Qb6a5 Rg3h3 Bc5f2 Re1f1 Nd7xe5
     8/14  00:00       433.067  0  +0.01  b2b3 Bc5f2 Bc1e3 Bf2xe3 Rd3xe3 Rf8d8 Re3g3 g7g6 Qg4f4
     9/14  00:00       508.544  4.623.127  -0.05  b2b3 Bc5f2 Bc1e3 Bf2xe3 Rd3xe3 Nd7c5 Bc4d3 Qb6a5 Re3h3 f7f5
    10/16  00:00     1.094.110  5.389.704  +0.20  b2b3
    10/16  00:00     1.372.211  5.488.844  +0.25  b2b3 Bc5f2 Rd3h3 Bf2xe1 Qg4h5 Be1h4 Rh3xh4 h7h6 Bc1xh6 Kh8g8
    11/20  00:00     2.924.398  6.248.713  +0.50  b2b3
    11/20  00:00     3.697.099  6.396.365  +0.45  b2b3 Rf8d8 Bc1g5 Rd8c8 Rd3h3 Qb6c7 Bc4d3 g7g6 Bd3c4 Qc7a5 Re1f1
    12/20  00:00     5.162.374  6.748.201  +0.41  b2b3 Rf8d8 Bc1g5 Rd8c8 Rd3g3 Bc5f8 Qg4f4 Qb6c5 Bg5h6 g7g6 Bh6g5 b7b5
    13/27  00:01     7.567.243  7.346.837  +0.32  b2b3 Rf8d8 Bc1g5 Rd8c8 Rd3g3 Bc5f8 Qg4f4 Qb6c5 Bg5h6 g7g6 Bh6xf8 Rc8xf8 Rg3d3
    14/27  00:01    13.920.446  7.690.854  +0.30  b2b3 Rf8d8 Bc1g5 Rd8c8 Rd3h3 Bc5d4 Qg4h5 Nd7f8 Bc4d3 Bc6xg2 Bd3xh7 Bg2f3 Rh3xf3 Nf8xh7
    15/31  00:04    32.016.358  7.922.879  +0.55  b2b3
    15/35  00:10    82.176.933  8.029.796  +0.45  b2b3 f7f5 e5xf6/ep Nd7xf6 Qg4g5 Bc6d7 Nc3e4 Bc5d4 c2c3 Nf6xe4 Re1xe4 Bd4f6 Qg5g4 Qb6c7 Bc1f4 Qc7c6 Bf4d6
    16/35  00:12   102.470.586  8.159.785  +0.60  b2b3 f7f5 e5xf6/ep Nd7xf6 Qg4g5 Bc6d7 Nc3e4 Bc5d4 c2c3 Nf6xe4 Re1xe4 Bd4f6 Qg5g4 Bd7c6 Re4xe6 Qb6g1 Re6e2 Qg1xh2
    16/35  00:17   142.836.378  8.226.480  +0.70  Rd3h3
    16/35  00:31   244.917.904  7.873.401  +1.20  Rd3h3
    16/42  00:43   334.698.856  7.640.654  +1.33  Rd3h3 Rf8e8 Re1f1 Re8e7 b2b3 f7f6 Qg4h4 g7g5 Qh4h6 Bc6xg2 e5xf6 Re7f7 Bc1xg5 Nd7e5 Rh3g3 Bg2xf1 Bc4xf1
    17/42  00:50   382.008.676  7.604.735  +1.58  Rd3h3
    17/42  01:02   471.707.484  7.531.052  +2.08  Rd3h3
    17/43  01:08   526.165.709  7.634.219  +2.10  Rd3h3 Rf8e8 Re1f1 Re8e7 Bc4d3 h7h6 Qg4g5 Kh8g8 Rh3xh6 Nd7f8 b2b3 Qb6a5 Bc1d2 Bc5b4 Rh6h3 Nf8g6 Bd3xg6 f7xg6 Qg5xg6 Qa5xe5
    18/46  01:53   846.215.617  7.433.768  +1.90  Rd3h3 Rf8d8 Re1f1 Bc5f2 b2b3 Qb6c5 Nc3e4 Qc5d4 Bc4d3 Bc6xe4 Qg4xe4 Qd4xe4 Bd3xe4 Bf2d4 Rf1xf7 h7h6 c2c3 Nd7xe5 Rf7xb7 Bd4c5
   09/10/2010 9:54:16 PM, Time for this analysis: 00:02:00, Rated time: 00:17

1 of 1 matching moves
09/10/2010 9:54:16 PM, Total time: 12:30:03 AM
Rated time: 00:17 = 17 Seconds

--------------------------------------------------------------------------------

Analysis from Q:\rh3.epd  
09/10/2010 9:24:13 PM Level: 20 Seconds
Analyzing engine: Stockfish-18-64-ja

1) Rh3;                
    Searching move: Rd3-h3
    Best move (Stockfish-18-64-ja): b2-b3
    Not found in: 02:00
      2  00:00         4.542  12.651  +0.56  Rd3g3 g7g6 b2b3
      2  00:00         4.734  13.150  +0.72  b2b3 Kh8g8
      3  00:00         5.745  15.914  +0.96  b2b3 Bc5f2 Re1e2
      4  00:00         6.507  18.024  +0.72  b2b3 Bc5f2 Bc1e3 Bf2xe3 Re1xe3
      5  00:00         9.166  24.907  +0.84  b2b3 Bc5f2 Re1e2 Kh8g8 Rd3h3
      6-  00:00        11.791  31.028  +0.60  b2b3 Bc5f2
      6  00:00        13.665  35.493  +0.56  b2b3 Bc5f2 Re1e2 Qb6c5 Bc1f4 b7b5
      7+  00:00        23.490  59.923  +0.92  b2b3 Bc5f2
      7  00:00        24.437  61.709  +0.56  b2b3 Bc5f2 Re1e2 Qb6c5 Qg4f4 b7b5 Nc3xb5
      8+  00:00        38.472  94.758  +0.72  b2b3 Bc5f2
      8-  00:00        47.960  115.845  +0.40  b2b3 Qb6b4
      8+  00:00        63.968  150.867  +0.88  b2b3 Qb6b4
      8  00:00        71.544  165.611  +0.84  b2b3 Bc5f2 Re1e2 Qb6c5 Rd3h3 g7g6 Qg4f4 Bc6xg2 Rh3d3
      9+  00:00        92.634  209.106  +1.13  b2b3 Bc5f2
      9  00:00       176.108  373.902  +1.05  b2b3 Bc5e7 Rd3h3 Qb6f2 Re1e2 Qf2f5 Qg4g3 Nd7c5 b3b4 b7b5 Nc3xb5
     10+  00:00       207.610  422.830  +1.41  b2b3 Bc5e7
     10  00:00       327.771  620.778  +1.41  b2b3 Rf8d8 Bc1g5 Rd8c8 Rd3h3 Nd7f8 Re1f1 Rc8c7 Bg5d2 Nf8g6 Bc4xe6 Ng6xe5
     11  00:00       667.099  1.040.716  +1.57  b2b3 Rf8d8 Bc1g5 Rd8c8 Rd3h3 Bc5f2 Re1d1 Nd7f8 Bg5e7 Bf2e3 Rd1f1 Qb6d4 Qg4xd4 Be3xd4 Rf1xf7 Bc6xg2
     12-  00:00     1.019.251  1.360.815  +1.21  b2b3 Bc5b4
     12-  00:00     1.051.284  1.363.533  +0.84  b2b3 Bc5b4
     12  00:01     2.085.036  1.987.641  +1.01  b2b3 Bc5b4 Qg4h4 Rf8c8 Re1e2 Qb6a5 Rd3h3 Nd7f8 Nc3e4 Bc6xe4 Qh4xe4 b7b5 Bc4d3 Nf8g6 Re2f2 Qa5a7
     13  00:01     2.283.862  2.024.700  +1.05  b2b3 Bc5b4 Qg4h4 Rf8c8 Re1e2 Qb6a5 Rd3h3 Nd7f8 Nc3e4 Bc6xe4 Qh4xe4 Rc8c7 Bc4d3 Nf8g6 Qe4g4 Bb4c3 Bd3xg6 f7xg6 Qg4xe6
     14  00:01     2.738.177  2.144.226  +1.09  b2b3 Bc5b4 Qg4h4 Rf8c8 Re1e2 Nd7f8 Nc3e4 Bc6xe4 Qh4xe4 Kh8g8 c2c3 Bb4c5 Rd3h3 Nf8g6 Bc4d3
     15+  00:01     3.030.896  2.194.711  +1.17  b2b3 Bc5b4
     15+  00:01     3.458.217  2.307.016  +1.25  b2b3 Bc5b4
     15-  00:01     4.314.485  2.472.484  +1.01  b2b3 Rf8d8
     15  00:01     4.421.899  2.437.651  +1.21  b2b3 Rf8d8 Rd3h3 Nd7f8 Re1f1 Rd8d7 Bc4d3 Qb6b4 Nc3e4 Qb4d4 Rh3f3 Bc6xe4 Qg4xe4 Qd4xe4 Bd3xe4 Kh8g8 Bc1g5
     16+  00:01     4.922.635  2.508.988  +1.37  b2b3 Rf8d8
     16+  00:02     5.374.484  2.588.865  +1.53  b2b3 Rf8d8
     16-  00:02     7.756.179  2.894.096  +1.05  b2b3 Rf8d8
     16  00:03     8.032.117  2.532.991  +1.33  b2b3 Rf8d8 Rd3h3 Nd7f8 Re1f1 Qb6c7 Bc4d3 Rd8xd3 Rh3xd3 Nf8g6 Rd3h3 h7h6 Rh3g3 Bc5f8 Bc1f4 Ra8d8 Qg4e2 Bf8c5 Bf4e3
     17-  00:03     8.645.574  2.583.081  +1.13  b2b3 Rf8d8
     17  00:04    12.111.195  2.820.492  +1.01  b2b3 Rf8d8 Rd3h3 Nd7f8 Re1f1 Qb6c7 Bc4d3 Rd8xd3 Rh3xd3 Nf8g6 Rd3g3 Bc5f8 Qg4e2 Ra8a5 Rg3h3 Ng6xe5 Qe2f2 h7h6 Qf2g3 f7f5 Bc1f4
     18  00:04    14.557.759  2.957.091  +1.01  b2b3 Rf8d8 Rd3h3 Nd7f8 Re1f1 Qb6c7 Bc4d3 Rd8xd3 Rh3xd3 Nf8g6 Rd3g3 Bc5f8 Qg4e2 Kh8g8 Bc1e3 Ng6xe5 Be3b6 Qc7xb6 Qe2xe5 Qb6a5 Qe5f6 Qa5h5 Qf6f4
     19+  00:06    19.347.705  3.151.092  +1.17  b2b3 Rf8d8
     19+  00:06    20.511.119  3.191.398  +1.33  b2b3 g7g6
     19  00:07    22.974.971  3.255.628  +1.05  b2b3 Rf8d8 Rd3h3 Nd7f8 Nc3e4 Bc6xe4 Re1xe4 Kh8g8 Qg4h5 Qb6c7 Bc4d3 b7b5 Bd3xb5 Bc5d4 Bc1g5 Rd8b8 c2c4 Bd4xe5 Bg5c1 Be5b2 Bc1f4
     20+  00:07    25.315.196  3.298.396  +1.13  b2b3 Rf8d8
     20+  00:07    26.189.272  3.316.357  +1.21  b2b3 Rf8d8
     20+  00:08    27.060.735  3.335.478  +1.37  b2b3 Rf8d8
     20  00:09    32.005.556  3.421.224  +1.33  b2b3 Rf8d8 Rd3h3 Nd7f8 Nc3e4 Bc6xe4 Re1xe4 Kh8g8 Qg4h4 h7h6 Bc4d3 Nf8g6 Qh4h5 Bc5e7 Re4e1 Rd8xd3 Rh3xd3 Qb6c7 Re1e4 Ra8a5 Re4c4 Ra5c5 Rc4xc5 Be7xc5 Bc1d2 Ng6xe5
     21+  00:11    39.449.595  3.503.516  +1.65  b2b3 Rf8d8
     21  00:23    88.519.658  3.744.961  +1.53  b2b3 f7f5 e5xf6/ep Nd7xf6 Qg4h3 Bc5b4 Re1xe6 Qb6f2 Re6e2 Qf2g1 Rd3d1 Qg1c5 Bc1e3 Qc5a5 Be3d4 Qa5g5 Bd4b6 h7h6 Bc4e6 Nf6h5 Nc3e4 Qg5g6 Qh3g4 Qg6xg4 Be6xg4 Nh5f4
     22  00:26    98.968.384  3.738.747  +1.41  b2b3 f7f5 e5xf6/ep Nd7xf6 Qg4h3 Bc5b4 Re1xe6 Qb6f2 Re6e2 Qf2g1 Qh3h4 Ra8d8 Re2e6 Bb4xc3 Rd3xc3 Rd8d4 Qh4e1 Qg1xe1 Re6xe1 Nf6e4 Rc3d3 Rd4xd3 Bc4xd3 Ne4c3+ Kb1a1 Rf8f2 Bc1xa3 Bc6xg2
     23+  00:31   118.415.272  3.743.646  +1.65  b2b3 f7f5
     23  00:33   124.809.433  3.754.683  +1.57  b2b3 f7f5 e5xf6/ep Nd7xf6 Qg4h3 Bc5b4 Re1xe6 Qb6f2 Nc3d5 Nf6xd5 Bc4xd5 Qf2g1 Bd5c4 b7b5 Re6xc6 b5xc4 Qh3e3 Qg1xe3 Rd3xe3 c4xb3 c2xb3 Rf8f1 Re3e4 Bb4d2 Re4e2 Bd2h6 g2g3 Kh8g8 Rc6c7 Bh6xc1 Rc7xc1
     24+  00:45   174.220.392  3.821.293  +1.81  b2b3 f7f5
     24+  01:11   276.993.727  3.871.817  +2.06  b2b3 g7g6
     24-  01:22   322.359.810  3.894.175  +1.33  b2b3 f7f5
     24  01:32   358.129.047  3.871.288  +1.89  b2b3 f7f5 Qg4h5 Rf8e8 g2g4 g7g6 Qh5h3 f5xg4 Qh3xg4 Qb6c7 Bc1f4 Bc5b4 Rd3h3 Bb4xc3 Rh3xc3 Qc7a5 Rc3e3 Nd7c5 Qg4h4 Kh8g8 Re1g1 Nc5e4 Re3h3
     25  01:40   388.341.222  3.870.832  +1.61  b2b3 f7f5 Qg4h5 Rf8e8 g2g4 g7g6 Qh5h3 f5xg4 Qh3xg4 Qb6c7 Qg4h3 Bc5b4 Bc1g5 Bb4e7 Rd3g3 Be7xg5 Rg3xg5 Nd7c5 Rg5xg6 Nc5e4 Rg6h6 Ne4d2+ Kb1c1 Nd2xc4 b3xc4 Qc7g7 Nc3b5 Bc6xb5 c4xb5 Ra8a5 c2c4 Ra5a4 Rh6xe6
   09/10/2010 9:56:24 PM, Time for this analysis: 00:02:00, Rated time: 02:00

0 of 1 matching moves
09/10/2010 9:56:25 PM, Total time: 12:32:11 AM
Rated time: 02:00 = 120 Seconds

Up Topic The Rybka Lounge / Test Positions / Test position

Powered by mwForum 2.27.4 © 1999-2012 Markus Wichitill