Skipper august 2017

[Henk]

[d]rnb1kb1r/p2ppp1p/q1p2np1/1p6/1P5P/N1P2NP1/P2PPP2/R1BQKB1R w KQkq - 0 1

Evaluation bugs?

Code: Select all

Depth  Value   Time(seconds)   Nodes
170    0.0000     160.99   143108045   g2g3 g7g6 b2b4 g8f6 c2c3 c7c6 h2h4 b7b5 g1f3 d8b6 b1a3 b6a6 
160    0.0000      19.69    18952752   g2g3 g7g6 b2b4 g8f6 c2c3 c7c6 h2h4 b7b5 g1f3 f8g7 b1a3 
150    0.0100       2.48     2503616   g2g3 g7g6 b2b4 c7c6 c1b2 g8f6 b2f6 e7f6 a2a3 c6c5 
140    0.0100      32.34    29345887   g2g3 g7g6 b2b4 c7c6 c1b2 g8f6 b2f6 e7f6 a2a3 c6c5 
130    0.0000      44.59    40249558   g2g4 b7b5 g4g5 b5b4 h2h4 g7g6 g1f3 a7a6 f1g2 
120    0.0000       3.45     2983048   g2g3 g7g6 c2c3 g8f6 g1f3 c7c6 b1a3 c6c5 
110    0.0000       4.28     3156089   g2g3 g7g6 c2c3 g8f6 g1f3 c7c6 b1a3 c6c5 
100    0.0600       1.81     1282972   g2g4 b8c6 g4g5 e7e5 h2h4 e5e4 b1a3 
 90    0.0000       0.33      226145   g2g3 g7g6 g1f3 b8c6 b1a3 c6b4 
 80    0.0000       0.62      303769   g2g3 g7g6 g1f3 b8c6 b1a3 c6b4 
 70    0.1200       0.05       24099   g2g3 g7g6 b1c3 g6g5 a1b1 
 60    0.0000       0.02        6580   g2g3 g7g6 b1a3 g6g5 
 50    0.0000       0.08       24181   g2g3 g7g6 b1a3 g6g5 
 40    0.1700       0.01        1662   g2g3 a7a6 b1a3 
 30    0.0000       0.00         350   h2h4 g8h6 
 20    0.0000       0.00         139   h2h4 g8h6 
 10    0.0000       0.01          45   h2h4 

[Henk]

At least found a bug in king safety

Code: Select all

Depth  Value   Time(seconds)   Nodes
140    0.0300      18.10    16504086   e2e4 e7e6 g1f3 a7a6 d2d4 g8f6 e4e5 f6d5 b1d2 d5b4 
130    0.0300       9.43     8484219   e2e4 e7e6 g1f3 a7a6 f3e5 d7d6 e5f3 a6a5 b1a3 
120    0.0800       4.82     4283017   b2b4 e7e6 b4b5 f8e7 e2e3 e7f6 b1c3 e6e5 
110    0.0400       3.34     2445476   d2d4 b8c6 d4d5 c6e5 g1f3 d7d6 f3e5 d6e5 
100    0.0600       0.60      476263   g1f3 e7e6 e2e3 g8f6 f3e5 f6e4 b1c3 
 90    0.0400       0.27      190845   g1f3 b8c6 e2e3 g8f6 b1a3 c6b4 
 80    0.0000       0.40      217509   e2e3 e7e6 g1f3 g8f6 b1a3 f6e4 
 70    0.1200       0.08       41341   e2e3 e7e6 g1f3 g8e7 b1a3 
 60    0.0000       0.02        7602   e2e3 e7e6 b1a3 e6e5 
 50    0.0000       0.07       16356   e2e3 e7e6 b1a3 e6e5 
 40    0.1800       0.01        1785   e2e3 a7a6 b1a3 
 30    0.0000       0.00         353   h2h4 g8h6 
 20    0.0000       0.00         139   h2h4 g8h6 
 10    0.0000       0.05          45   h2h4 

What should be the value of King Safety in this position ?

[d] rnbqkbnr/p2p3p/1pp2pp1/4p3/8/2P1P1P1/PPQPKPBP/RNB3NR w kq - 0 7

[zullil]

[d]rnb1kb1r/p2ppp1p/q1p2np1/1p6/1P5P/N1P2NP1/P2PPP2/R1BQKB1R w KQkq - 0 1

Evaluation bugs?

Code: Select all

Depth  Value   Time(seconds)   Nodes
170    0.0000     160.99   143108045   g2g3 g7g6 b2b4 g8f6 c2c3 c7c6 h2h4 b7b5 g1f3 d8b6 b1a3 b6a6 
160    0.0000      19.69    18952752   g2g3 g7g6 b2b4 g8f6 c2c3 c7c6 h2h4 b7b5 g1f3 f8g7 b1a3 
150    0.0100       2.48     2503616   g2g3 g7g6 b2b4 c7c6 c1b2 g8f6 b2f6 e7f6 a2a3 c6c5 
140    0.0100      32.34    29345887   g2g3 g7g6 b2b4 c7c6 c1b2 g8f6 b2f6 e7f6 a2a3 c6c5 
130    0.0000      44.59    40249558   g2g4 b7b5 g4g5 b5b4 h2h4 g7g6 g1f3 a7a6 f1g2 
120    0.0000       3.45     2983048   g2g3 g7g6 c2c3 g8f6 g1f3 c7c6 b1a3 c6c5 
110    0.0000       4.28     3156089   g2g3 g7g6 c2c3 g8f6 g1f3 c7c6 b1a3 c6c5 
100    0.0600       1.81     1282972   g2g4 b8c6 g4g5 e7e5 h2h4 e5e4 b1a3 
 90    0.0000       0.33      226145   g2g3 g7g6 g1f3 b8c6 b1a3 c6b4 
 80    0.0000       0.62      303769   g2g3 g7g6 g1f3 b8c6 b1a3 c6b4 
 70    0.1200       0.05       24099   g2g3 g7g6 b1c3 g6g5 a1b1 
 60    0.0000       0.02        6580   g2g3 g7g6 b1a3 g6g5 
 50    0.0000       0.08       24181   g2g3 g7g6 b1a3 g6g5 
 40    0.1700       0.01        1662   g2g3 a7a6 b1a3 
 30    0.0000       0.00         350   h2h4 g8h6 
 20    0.0000       0.00         139   h2h4 g8h6 
 10    0.0000       0.01          45   h2h4 

Skipper reports search depth in deci-plies. How novel.

[Henk]

Yes milli-plies is too much I found out after years of research.

[zenpawn]

What should be the value of King Safety in this position ?

[d] rnbqkbnr/p2p3p/1pp2pp1/4p3/8/2P1P1P1/PPQPKPBP/RNB3NR w kq - 0 7

According to Stockfish 8, both kings are safe:

Code: Select all

position fen rnbqkbnr/p2p3p/1pp2pp1/4p3/8/2P1P1P1/PPQPKPBP/RNB3NR w kq - 0 7
eval
      Eval term |    White    |    Black    |    Total
                |   MG    EG  |   MG    EG  |   MG    EG
----------------+-------------+-------------+-------------
       Material |   ---   --- |   ---   --- |  0.10  0.38
      Imbalance |   ---   --- |   ---   --- |  0.00  0.00
          Pawns |   ---   --- |   ---   --- | -0.02 -0.00
        Knights |  0.06  0.00 |  0.00  0.00 |  0.06  0.00
         Bishop | -0.19 -0.39 | -0.26 -0.39 |  0.06  0.00
          Rooks |  0.00  0.00 | -0.28  0.00 |  0.28  0.00
         Queens |  0.00  0.00 |  0.00  0.00 |  0.00  0.00
       Mobility | -0.29 -0.23 | -0.18 -0.23 | -0.11  0.00
    King safety |  0.49 -0.06 |  0.47 -0.06 |  0.02  0.00
        Threats |  0.00  0.10 |  0.00  0.10 |  0.00  0.00
   Passed pawns |  0.00  0.00 |  0.00  0.00 |  0.00  0.00
          Space |  0.46  0.00 |  0.69  0.00 | -0.23  0.00
----------------+-------------+-------------+-------------
          Total |   ---   --- |   ---   --- |  0.18  0.48

Total Evaluation: 0.26 (white side)

[mclane]

The kings are safe because no pieces are developed that could attack the king.

[Daniel Anulliero]

Yet another funny topic by Skipper's programmer
It seems you have a bug in the time per depth no ?

[Henk]

Code: Select all

Depth  Value   Time(seconds)   Nodes
130    0.0000      16.64     9790909   e2e3 e7e6 f1b5 d8g5 b5f1 g5d8 f1b5 d8g5 b5f1 g5d8 f1b5