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Subject: Re: What does your engine play in this position?

Author: Tord Romstad

Date: 08:02:04 09/20/03

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Hello, Mikael!

My program (the handle is "GothmogX") has played a few games against
Chepla in the past (although not recently; it seems that we have both
been rather inactive lately), and I have often wondered who the author
was.  Thanks for helping me solve the mystery!  :-)

On September 20, 2003 at 08:26:49, Mikael Bäckman wrote:

>This position occured in a 15 min game chepla-nullmover.
>
>[D]r1b1kb1r/1p3ppp/p2pp3/q1pNn2Q/2B5/PP6/2PP1PPP/R1B1R1K1 w kq - 0 14

If the move Rxe5 is indeed correct, the speed with which Chepla finds
it is impressive.  Gothmog, which usually likes to make sacrifices,
prefers Bb2 in the first few iterations, and finds Rxe5 only after
almost 4 minutes:

 1       -0.61     0.01       1174 d5c3
 2       -0.47     0.02       2248 c1b2 e6d5 b2e5 d6e5
 3       -0.47     0.05       4560 c1b2 e6d5 b2e5 d6e5
 4       -0.56     0.21      21809 c1b2 e5c4 b3c4 c8d7
 5       -0.27     0.44      53061 c1b2 e6d5 c4d5 e8d8 b2e5 d6e5 e1e5
 6    <= -0.28     0.73      96266 c1b2 e5c4 b3c4 c8d7 b2f6 g7g6
 6    <= -0.30     0.74      97878 c1b2 e5c4 b3c4 c8d7 b2f6 g7g6
 6    <= -0.33     0.76     102491 c1b2 e5c4 b3c4 c8d7 b2f6 g7g6
 6    >= -0.39     0.79     107807 c1b2 e5c4 b3c4 c8d7 b2c3 a5d8
 6    >= -0.38     0.80     108358 c1b2 e5c4 b3c4 c8d7 b2c3 a5d8
 6    <= -0.34     0.80     109787 c1b2 e5c4 b3c4 c8d7 b2c3 a5d8
 6    <= -0.36     0.82     114443 c1b2 e5c4 b3c4 c8d7 b2c3 a5d8
 6    <= -0.38     0.84     117189 c1b2 e5c4 b3c4 c8d7 b2c3 a5d8
 6       -0.38     0.84     117189 c1b2 e5c4 b3c4 c8d7 b2c3 a5d8
 7    >= -0.38     1.08     154709 c1b2 e5c4 b3c4 c8d7 b2c3 a5d8 e1e4
 7    >= -0.36     1.09     157979 c1b2 e5c4 b3c4 c8d7 b2c3 a5d8 e1e4
 7    >= -0.30     1.11     163661 c1b2 e5c4 b3c4 c8d7 b2c3 a5d8 e1e4
 7    >= -0.16     1.18     177736 c1b2 e5c4 b3c4 c8d7 b2c3 a5d8 d2d4
 7    <=  0.08     1.43     221340 c1b2 e5c4 b3c4 c8d7 b2c3 a5d8 d2d4
 7    <=  0.06     1.44     223675 c1b2 e5c4 b3c4 c8d7 b2c3 a5d8 d2d4
 7    <=  0.03     1.45     227312 c1b2 e5c4 b3c4 c8d7 b2c3 a5d8 d2d4
 7    <= -0.05     1.49     235581 c1b2 e5c4 b3c4 c8d7 b2c3 a5d8 d2d4
 7    >= -0.14     1.50     238683 c1b2 e5c4 b3c4 c8d7 b2c3 a5d8 d2d3
 7    >= -0.12     1.51     241060 c1b2 e5c4 b3c4 c8d7 b2c3 a5d8 d2d3
 7    <= -0.08     1.53     245411 c1b2 e5c4 b3c4 c8d7 b2c3 a5d8 d2d3
 7    <= -0.09     1.55     250384 c1b2 e5c4 b3c4 c8d7 b2c3 a5d8 d2d3
 7    >= -0.11     1.56     254452 c1b2 e5c4 b3c4 c8d7 b2c3 a5d8 d2d3
 7    <= -0.11     1.58     258205 c1b2 e5c4 b3c4 c8d7 b2c3 a5d8 d2d3
 7       -0.11     1.58     258205 c1b2 e5c4 b3c4 c8d7 b2c3 a5d8 d2d3
 8    <= -0.12     2.40     406456 c1b2 e5c4 b3c4 c8d7 b2c3 a5d8 d2d3 b7b5
 8    <= -0.14     2.42     413979 c1b2 e5c4 b3c4 c8d7 b2c3 a5d8 d2d3 b7b5
 8    <= -0.17     2.50     434198 c1b2 e5c4 b3c4 c8d7 b2c3 a5d8 d2d3 b7b5
 8    <= -0.25     2.66     470049 c1b2 e5c4 b3c4 c8d7 b2c3 a5d8 d2d3 b7b5
 8    >= -0.39     3.05     539629 c1b2 e5c4 b3c4 c8d7 b2c3 a5d8 d2d3 b7b5
 8    >= -0.38     3.07     543182 c1b2 e5c4 b3c4 c8d7 b2c3 a5d8 d2d3 b7b5
 8    >= -0.31     3.10     550824 c1b2 e5c4 b3c4 c8d7 b2c3 a5d8 d2d3 b7b5
 8    <= -0.27     3.14     562187 c1b2 e5c4 b3c4 c8d7 b2c3 a5d8 d2d3 b7b5
 8    >= -0.27     3.21     577025 c1b2 e5c4 b3c4 c8d7 b2c3 a5d8 d2d3 b7b5
 8       -0.27     3.21     577025 c1b2 e5c4 b3c4 c8d7 b2c3 a5d8 d2d3 b7b5
 9    >= -0.27     4.78     856519 c1b2 e5c4 b3c4 c8d7 b2c3 a5d8 e1e4 b7b5
                                   a1e1
 9    >= -0.25     4.83     871600 c1b2 e5c4 b3c4 c8d7 b2c3 a5d8 e1e4 b7b5
                                   a1e1
 9    >= -0.19     5.11     934005 c1b2 e5c4 b3c4 c8d7 b2c3 a5d8 h5g4 h7h5
                                   g4f4
 9    <= -0.06     7.89    1443595 c1b2 e5c4 b3c4 c8d7 b2c3 a5d8 h5g4 h7h5
                                   g4f4
 9    <= -0.08     7.99    1476021 c1b2 e5c4 b3c4 c8d7 b2c3 a5d8 h5g4 h7h5
                                   g4f4
 9    <= -0.11     8.36    1561267 c1b2 e5c4 b3c4 c8d7 b2c3 a5d8 h5g4 h7h5
                                   g4f4
 9    >= -0.17    12.36    2292575 e1e5 d6e5 h5e5 e8d7 c1b2 b7b5 b3b4 f8d6
                                   e5g7
 9    <= -0.17    12.58    2351397 e1e5 d6e5 h5e5 e8d7 c1b2 b7b5 b3b4 f8d6
                                   e5g7
 9       -0.17    12.58    2351397 e1e5 d6e5 h5e5 e8d7 c1b2 b7b5 b3b4 f8d6
                                   e5g7
10    >= -0.17    14.41    2684562 e1e5 d6e5 h5e5 e8d7 c1b2 b7b5 b3b4 f8d6
                                   e5g7
10    >= -0.16    15.38    2861418 e1e5 d6e5 h5e5 e8d7 c1b2 b7b5 b3b4 f8d6
                                   e5g7
10    >= -0.09    16.89    3146870 e1e5 d6e5 h5e5 e8d7 d2d4 e6d5 e5d5 f8d6
                                   d5f7 d7c6 c1e3
10    >=  0.05    38.03    6976211 c1b2 e5c4 b3c4 c8d7 h5h4
10    <=  0.28    46.30    8497552 c1b2 e5c4 b3c4 a8b8 e1e3
10    <=  0.27    46.41    8532178 c1b2 e5c4 b3c4 a8b8 e1e3
10    <=  0.23    46.78    8618824 c1b2 e5c4 b3c4 a8b8 e1e3 a5d2 d5c7 e8e7
                                   e3f3 g7g6 h5h4 g6g5 b2f6 e7d7 f6g5
10    >=  0.17    60.22   11037682 c1b2 e5c4 b3c4 a8b8 h5h4 a5d8 h4g3 f7f6
10    >=  0.19    60.88   11171525 c1b2 e5c4 b3c4 a8b8 h5h4 a5d8 h4g3 f7f6
10    <=  0.22    61.06   11219989 c1b2 e5c4 b3c4 a8b8 h5h4 a5d8 h4g3 f7f6
10    <=  0.20    61.17   11254791 c1b2 e5c4 b3c4 a8b8 h5h4 a5d8 h4g3 f7f6
10    >=  0.20    61.47   11325431 c1b2 e5c4 b3c4 a8b8 h5h4 a5d8 h4g3 f7f6
10        0.20    61.47   11325431 c1b2 e5c4 b3c4 a8b8 h5h4 a5d8 h4g3 f7f6
11    <=  0.19    72.43   13361647 c1b2 e5c4 b3c4 a8b8 h5h4 a5d8 h4g3 f7f6
11    <=  0.17    73.03   13518958 c1b2 e5c4 b3c4 a8b8 h5h4 a5d8 h4g3 f7f6
11    <=  0.14    74.03   13764515 c1b2 e5c4 b3c4 a8b8 h5h4 a5d8 h4g3 f7f6
11    <=  0.06    76.53   14308028 c1b2 e5c4 b3c4 a8b8 h5h4 a5d8 h4g3 f7f6
11    >= -0.08    86.61   16164496 c1b2 e5c4 b3c4 a8b8 h5h4 a5d8 h4g3 f7f6
                                   g3g4 f6f5 g4h5 g7g6 d5f6
11    >= -0.06    87.23   16308819 c1b2 e5c4 b3c4 a8b8 h5h4 a5d8 h4g3 f7f6
                                   g3g4 f6f5 g4h5 g7g6 d5f6
11    >=  0.00    88.89   16678097 c1b2 e5c4 b3c4 a8b8 h5h4 a5d8 h4g3 f7f6
                                   g3g4 f6f5 g4h5 g7g6 d5f6
11    <=  0.05    89.78   16900566 c1b2 e5c4 b3c4 a8b8 h5h4 a5d8 h4g3 f7f6
                                   g3g4 f6f5 g4h5 g7g6 d5f6
11    >=  0.05    90.75   17138333 c1b2 e5c4 b3c4 a8b8 h5h4 a5d8 h4g3 f7f6
                                   g3g4 f6f5 g4h5 g7g6 d5f6
11        0.05    90.75   17138333 c1b2 e5c4 b3c4 a8b8 h5h4 a5d8 h4g3 f7f6
                                   g3g4 f6f5 g4h5 g7g6 d5f6
12    >=  0.05   114.77   21548122 c1b2 e5c4 b3c4 a8b8 h5h4 a5d8 b2f6 d8d7
                                   d2d3 b7b6 h4h5
12    >=  0.06   118.47   22302378 c1b2 e5c4 b3c4 a8b8 h5h4 a5d8 b2f6 d8d7
                                   d2d3 b7b6 h4h5
12    >=  0.12   130.05   24541776 c1b2 e5c4 b3c4 a8b8 h5h4 a5d8 b2f6 d8d7
                                   h4g5 h7h6 g5h5
12    >=  0.27   233.21   43570796 e1e5 d6e5 h5e5 e8d7 d2d4 b7b5 d4c5 f8c5
                                   b3b4 c5d6 e5g7
12    <=  0.50   245.79   45900712 e1e5 d6e5 h5e5 e8d7 d2d4 f8d6 e5g7 a5e1
                                   c4f1 e6d5 g7h8 e1c3 a1b1
12    <=  0.48   246.45   46080215 e1e5 d6e5 h5e5 e8d7 d2d4 f8d6 e5g7 a5e1
                                   c4f1 e6d5 g7h8 e1c3 a1b1
12    <=  0.45   247.31   46311085 e1e5 d6e5 h5e5 e8d7 d2d4 f8d6 e5g7 a5e1
                                   c4f1 e6d5 g7h8 e1c3 a1b1
12    <=  0.38   250.15   46934332 e1e5 d6e5 h5e5 e8d7 d2d4 f8d6 e5g7 a5e1
                                   c4f1 e6d5 g7h8 e1c3 a1b1
12    >=  0.28   256.06   48060856 e1e5 d6e5 h5e5 e8d7 d2d4 f8d6 e5g7 a5e1
                                   c4f1 e6d5 g7h8 e1c3 a1b1
12    >=  0.30   259.29   48720468 e1e5 d6e5 h5e5 e8d7 d2d4 f8d6 e5g7 a5e1
                                   c4f1 e6d5 g7h8 e1c3 a1b1
12    <=  0.34   261.10   49145689 e1e5 d6e5 h5e5 e8d7 d2d4 f8d6 e5g7 a5e1
                                   c4f1 e6d5 g7h8 e1c3 a1b1
12    <=  0.33   262.52   49475230 e1e5 d6e5 h5e5 e8d7 d2d4 f8d6 e5g7 a5e1
                                   c4f1 e6d5 g7h8 e1c3 a1b1
12    >=  0.31   264.32   49864581 e1e5 d6e5 h5e5 e8d7 d2d4 f8d6 e5g7 a5e1
                                   c4f1 e6d5 g7h8 e1c3 a1b1
12    <=  0.31   265.30   50109949 e1e5 d6e5 h5e5 e8d7 d2d4 f8d6 e5g7 a5e1
                                   c4f1 e6d5 g7h8 e1c3 a1b1
12        0.31   265.30   50109949 e1e5 d6e5 h5e5 e8d7 d2d4 f8d6 e5g7 a5e1
                                   c4f1 e6d5 g7h8 e1c3 a1b1
13    >=  0.31   395.61   74276723 e1e5 d6e5 h5e5 e8d7 d2d4 f8d6 e5g7 a5e1
                                   c4f1 e6d5 g7h8 e1c3 a1b1
13    <=  0.31   512.41   96116076 e1e5 d6e5 h5e5 e8d7 d2d4 f8d6 e5g7 a5e1
                                   c4f1 e6d5 g7h8 e1c3 a1b1
13        0.31   512.41   96116076 e1e5 d6e5 h5e5 e8d7 d2d4 f8d6 e5g7 a5e1
                                   c4f1 e6d5 g7h8 e1c3 a1b1

Tord



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