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The Rookies And The Assassin

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MadChess 3.0 participated in a tournament Graham Banks arranged, named The Rookies And The Assassin.

                                    1    2    3    4    5    6    7    8    9    0    1    2    
1   CM9000 Assassin                 **** 0½10 ½½11 1½½1 101½ ½1½0 ½01½ 0101 ½011 1½11 01½1 1111  28.5/44
2   RookieMonster 1.9.6-dev 64-bit  1½01 **** 1110 0101 01½1 1011 ½½½½ 0½00 1101 100½ 0111 1101  26.0/44
3   Lozza 2.1 64-bit                ½½00 0001 **** 100½ 1½0½ 1101 ½½½½ 11½1 ½½½½ 111½ ½111 00½½  24.0/44
4   Betsabe II 2020                 0½½0 1010 011½ **** 1½½½ 10½1 1½1½ ½½½1 ½½00 0100 1½1½ 11½0  23.5/44  503.00
5   Blunder 7.6.0 64-bit            010½ 10½0 0½1½ 0½½½ **** 00½½ ½010 110½ 1101 1101 0½½1 1111  23.5/44  490.00
6   Raven 1.20 64-bit               ½0½1 0100 0010 01½0 11½½ **** ½1½½ ½½10 1½1½ 10½1 001½ 1011  23.0/44
7   RookieMonster 1.9.6 64-bit      ½10½ ½½½½ ½½½½ 0½0½ ½101 ½0½½ **** 1½1½ 1010 ½0½0 0½½0 11½1  21.5/44  469.75
8   MadChess 3.0 64-bit             1010 1½11 00½0 ½½½0 001½ ½½01 0½0½ **** 010½ ½10½ 1011 11½½  21.5/44  463.75
9   Zevra 2.5 64-bit                ½100 0010 ½½½½ ½½11 0010 0½0½ 0101 101½ **** 0111 111½ 1000  21.5/44  461.75
10  Jumbo 0.7.0 64-bit              0½00 011½ 000½ 1011 0010 01½0 ½1½1 ½01½ 1000 **** ½001 0111  19.5/44
11  Myrddin 0.88 64-bit             10½0 1000 ½000 0½0½ 1½½0 110½ 1½½1 0100 000½ ½110 **** ½00½  16.5/44
12  CT800 1.43 64-bit               0000 0010 11½½ 00½1 0000 0100 00½0 00½½ 0111 1000 ½11½ ****  15.0/44

Games

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Banks 91st Amateur Series Division 7

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MadChess 3.0 participated in Graham Banks’ 91st amateur tournament in division 7.

                              1    2    3    4    5    6    7    8    9    0    1    2    
1   Drosophila 1.6 64-bit     **** 111½ 10½0 ½0½½ 1111 1101 1011 ½1½1 1111 1½01 101½ ½½11  31.5/44
2   MadChess 3.0 64-bit       000½ **** ½1½½ 1½½1 011½ 1½1½ 101½ ½0½½ 101½ 0½11 1½11 1½11  27.5/44
3   Delocto 200419 64-bit     01½1 ½0½½ **** ½½01 ½1½0 110½ 1½11 0010 ½1½½ 1½1½ 11½½ ½111  27.0/44
4   Betsabe II 2020           ½1½½ 0½½0 ½½10 **** 0011 ½1½1 0½00 ½1½1 ½½11 1101 11½½ ½½11  26.0/44
5   Raven 1.20 64-bit         0000 100½ ½0½1 1100 **** ½1½0 ½½½1 ½11½ 1½½½ 1½10 1½01 1111  24.5/44
6   Lozza 2.0 64-bit          0010 0½0½ 001½ ½0½0 ½0½1 **** ½0½½ 11½½ 011½ 11½0 ½111 110½  22.0/44
7   CT800 1.43 64-bit         0100 010½ 0½00 1½11 ½½½0 ½1½½ **** 0½01 ½110 0½10 11½½ 001½  20.5/44
8   Myrddin 0.88 64-bit       ½0½0 ½1½½ 1101 ½0½0 ½00½ 00½½ 1½10 **** 0½½1 0½0½ ½½½0 111½  20.0/44
9   paulchen332 0.1.1 64-bit  0000 010½ ½0½½ ½½00 0½½½ 100½ ½001 1½½0 **** ½111 ½100 1110  18.5/44
10  Odonata 0.5.1 64-bit      0½10 1½00 0½0½ 0010 0½01 00½1 1½01 1½1½ ½000 **** 0½0½ 11½0  17.5/44
11  FoxSEE 7.32.1 64-bit      010½ 0½00 00½½ 00½½ 0½10 ½000 00½½ ½½½1 ½011 1½1½ **** 00½0  15.5/44
12  Qapla 0.1.1 64-bit        ½½00 0½00 ½000 ½½00 0000 001½ 110½ 000½ 0001 00½1 11½1 ****  13.5/44

Games

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Toxic Environment

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MadChess 3.0 participated in a tournament Graham Banks arranged, named Toxic Environment.

                                    1    2    3    4    5    6    7    8    9    0    
1   RookieMonster 1.9.6-dev 64-bit  **** 1½½1 1110 0100 111½ ½½1½ 0½01 ½110 1½11 01½1  23.0/36  401.75
2   Delocto 200419 64-bit           0½½0 **** ½½11 1½½0 100½ 1101 0½½1 1111 0½11 1111  23.0/36  377.50
3   CM11th Toxic                    0001 ½½00 **** 11½1 1101 ½011 101½ ½1½0 0½11 1½½1  21.0/36
4   Blunder 7.6.0 64-bit            1011 0½½1 00½0 **** 0½11 ½1½1 011½ 01½1 ½1½0 01½1  20.5/36
5   Betsabe II 2020                 000½ 011½ 0010 1½00 **** ½01½ ½1½½ ½110 1001 1111  18.5/36
6   Zevra 2.5 64-bit                ½½0½ 0010 ½100 ½0½0 ½10½ **** ½111 ½0½1 1100 ½111  18.0/36
7   Fridolin 3.10 64-bit            1½10 1½½0 010½ 100½ ½0½½ ½000 **** 1½01 0101 ½0½1  16.0/36  290.50
8   Rodin 8.0                       ½001 0000 ½0½1 10½0 ½001 ½1½0 0½10 **** ½10½ 1111  16.0/36  260.00
9   MadChess 3.0 64-bit             0½00 1½00 1½00 ½0½1 0110 0011 1010 ½01½ **** 1½½0  15.5/36
10  Odonata 0.5.1 64-bit            10½0 0000 0½½0 10½0 0000 ½000 ½1½0 0000 0½½1 ****   8.5/36

Games

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MadChess 3.1 Beta d691b32 (Pawn Structure)

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I added evaluation of two pawn structure features to MadChess 3.1 Beta.

  • Isolated Pawns
  • Doubled Pawns

In addition to pawn structure evaluation, I made other code quality improvements in a series of Pull Requests.

Evaluating pawn structure increased the playing strength of MadChess 3.1 Beta by 15 Elo.

 

Feature Category Date Commit1 WAC2 Elo Rating3 Improvement
Pawn Structure Evaluation 2022 Jan 11 d691b32 288 2651 +15
Threats Evaluation 2021 Oct 24 26e5323 289 2636 +7
Color-Agnostic Code Evaluation 2021 Sep 13 2b475bc 286 2629 +12
Singular Move Search 2021 Jun 14 0c601ea 290 2617 +13
Endgame Eval Scaling Evaluation 2021 Apr 08 4d22dec 286 2604 +12
Bishop Pair Evaluation 2021 Mar 14 2960ec9 285 2592 +22
Position Cache Optimization Search 2021 Feb 23 42d7702 286 2570 +8
Move Generation Optimization Search 2021 Feb 17 22002dc 287 2562 +12
PVS and Null Move Search 2021 Feb 09 f231dac 285 2550 +20
Remove Aspiration Windows Search 2020 Dec 20 4b7963b 290 2530 +9
Time Management Search 2020 Dec 19 d143bb5 286 2521 +8
Crash Bug Search 2020 Aug 29 2d855ec 288 2513 +0
King Safety Evaluation 2020 Aug 16 6794c89 288 2513 +63
Eval Param Tuning Evaluation 2020 Jul 23 bef88d5 283 2450 +30
Late Move Pruning Search 2020 Feb 08 6f3d17a 288 2420 +29
Piece Mobility Evaluation 2020 Feb 01 5c5d4fc 282 2391 +62
Passed Pawns Evaluation 2018 Dec 27 103 279 2329 +119
Staged Move Generation Search 2018 Dec 15 93 275 2210 +39
History Heuristics Search 2018 Dec 03 84 275 2171 +28
Eval Param Tuning Evaluation 2018 Nov 24 75 272 2143 +47
Sophisticated Search
Material and Piece Location		 Baseline 2018 Nov 08 58 269 2096 0
  1. GitHub commit (hash) or Subversion source code revision (integer)
  2. Win At Chess position test, 3 seconds per position
  3. Bullet chess, 2 min / game + 1 sec / move
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Banks 90th Amateur Series Division 7

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MadChess 3.0 participated in Graham Banks’ 90th amateur tournament in division 7.

                              1   2   3   4   5   6   7   8   9   0   1   2   
1   Blunder 7.6.0 64-bit      *** 00  ½01 ½1  100 110 111 1½½ 111 110 1½  1½   19.0/29
2   Drosophila 1.6 64-bit     11  *** 11  000 11  010 ½0½ 01  1½  110 110 111  17.5/28
3   Protej 0.6.1 64-bit       ½10 00  *** ½01 ½1½ 1½  ½½  1½½ 110 ½1  011 ½1   16.5/28
4   Zevra 2.5 64-bit          ½0  111 ½10 *** 10  0½1 01½ 00  01  11½ 1½  1½½  16.0/28
5   MadChess 3.0 64-bit       011 00  ½0½ 01  *** 1½  10  11½ 0½½ 0½1 01  1½1  15.0/28  200.00
6   Betsabe II 2020           001 101 0½  1½0 0½  *** 001 1½  10  11  011 110  15.0/28  199.25
7   Odonata 0.5.1 64-bit      000 ½1½ ½½  10½ 01  110 *** 0½  1½0 ½1  1½1 010  14.5/29
8   Nawito 2103 64-bit        0½½ 10  0½½ 11  00½ 0½  1½  *** ½½½ 01  10  111  14.0/27
9   Raven 1.20 64-bit         000 0½  001 10  1½½ 01  0½1 ½½½ *** ½0½ ½0  111  13.0/29
10  Myrddin 0.88 64-bit       001 001 ½0  00½ 1½0 00  ½0  10  ½1½ *** 1½½ 10   11.0/28
11  paulchen332 0.1.1 64-bit  0½  001 100 0½  10  100 0½0 01  ½1  0½½ *** ½1   10.5/27
12  Loki 3.5.0 64-bit         0½  000 ½0  0½½ 0½0 001 101 000 000 01  ½0  ***   7.0/29

Games