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increase a position's mate score from 23 to 32 #116

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Jul 20, 2024
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increase a position's mate score from 23 to 32 #116

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2 changes: 1 addition & 1 deletion README.md
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Expand Up @@ -69,7 +69,7 @@ contains illegal moves or does not end in checkmate.
* `ChestUCI_23102018.epd`: The original suite derived from publicly available `ChestUCI.epd` files, see [FishCooking](https://groups.google.com/g/fishcooking/c/lh1jTS4U9LU/m/zrvoYQZUCQAJ). It contains 6561 positions, with one definite and five likely draws, some illegal positions and some positions with a sub-optimal or likely incorrect value for the fastest known mate.
* **`matetrack.epd`**: The successor to `ChestUCI_23102018.epd`, with all illegal positions removed and all known errors corrected. The plots shown above are based on this file. It contains 6554 mate problems, ranging from mate in 1 (#1) to #126 for positions with between 4 and 32 pieces. In 26 positions the side to move is going to get mated.
* `matetrackpv.epd`: The same as `matetrack.epd`, but for each position the file also includes a PV leading to the checkmate, if such a PV is known.
* `matedtrack.epd`: Derived from `matetrackpv.epd` by applying a best move in all those positions, where the winning side is to move, and where a best move is known. The order of the positions in `matedtrack.epd` corresponds 1:1 to the order in `matetrack.epd`. So the new test suite still contains 6554 mate problems, but for 6544 of them the side to move is going to get mated.
* `matedtrack.epd`: Derived from `matetrackpv.epd` by applying a best move in all those positions, where the winning side is to move, and where a best move is known. The order of the positions in `matedtrack.epd` corresponds 1:1 to the order in `matetrack.epd`. So the new test suite still contains 6554 mate problems, but for 6545 of them the side to move is going to get mated.
* `mates2000.epd`: A smaller test suite with 2000 positions ranging from #1 to #27. It contains a random selection of positions from `matetrack.epd` and `matedtrack.epd` that Stockfish can solve with 1M nodes. In 1105 positions the side to move is going to get mated.

### Automatic creation of new test positions
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2 changes: 1 addition & 1 deletion matedtrack.epd
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Expand Up @@ -6295,7 +6295,6 @@ R2n1R2/1pn2kBp/4p3/P2pKNr1/4N3/1pP5/6p1/3br3 b - - bm #-22;
8/5p1B/2b1pP2/3pP3/1KpP4/1pB5/pP6/k7 b - - bm #-22;
q1n3r1/8/rbn4p/8/1P6/P2Q1P2/1p1Np3/k3K2R b - - bm #-22;
2k5/8/1P1P4/8/7p/p1p1p2P/P1P1P2P/b2K4 b - - bm #-22;
2r1b1Q1/6p1/2P5/5P2/1p2K3/pPp5/n2P4/1B2k3 w - - bm #23;
8/p1p5/3p4/p3p3/3k1p2/1KP1b1p1/1N5p/7B b - - bm #-22;
1Rn4k/n1p5/pb1p1N1P/3P3p/7p/p1p1P3/P1P1PP1P/7K b - - bm #-22;
Q7/6p1/8/8/1p6/3P3P/2P3pp/4K2k b - - bm #-23;
Expand Down Expand Up @@ -6403,6 +6402,7 @@ rb2b2R/2npk3/p1p3PP/1n2KNN1/6P1/P1p3p1/3p3p/3B2rq b - - bm #-30;
8/6B1/8/8/1B2p3/4p3/B3p1pp/2k1Kbrr b - - bm #-30;
1K4kB/6P1/6P1/3r4/8/1R6/B1PPPP2/2R5 b - - bm #-30;
N3k1nR/p1p1Pp2/2P1pPr1/b2pP3/P1pP4/2P1K1p1/6P1/8 b - - bm #-30;
2r1b3/6p1/2P1Q3/5P2/1p2K3/pPp5/n2P4/1B2k3 b - - bm #-31;
5n2/B3K3/2p3p1/4k3/6NP/3bN1P1/2Prn1P1/1q6 b - - bm #-31;
8/8/3K4/1pN2p2/bp2kp1p/5rbr/1p1PBp1p/N3R2n b - - bm #-31;
Q7/8/8/8/k7/8/3p1pp1/3Kbrrb b - - bm #-31;
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2 changes: 1 addition & 1 deletion matetrack.epd
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Expand Up @@ -6295,7 +6295,6 @@ R2n3R/1pn2kBp/4p3/P2pKNr1/4N3/1pP5/6p1/3br3 w - - bm #23; 00:00 @ C3/R0/K2/P1/X1
8/5p1B/2b1pP2/3pP3/2pP4/KpB5/pP6/k7 w - - bm #23; --:-- @ C16/R0/K1/P3/X11; 00'24" (Gustav);
q1n3r1/8/rbn4p/8/1P6/PQ3P2/1p1Np3/k3K2R w - - bm #23; --:-- @ C0/R4/K4/P8/X44;
2k5/8/1P1P4/8/7p/p1p1p2P/P1P1P2P/b1K5 w - - bm #23;
2r1b1Q1/6p1/2P5/5P2/1p2K3/pPp5/n2P4/1B2k3 w - - bm #23;
8/p1p5/3p4/p3p3/3k1p2/1K2b1p1/1NP4p/7B w - - bm #23;
R1n4k/n1p5/pb1p1N1P/3P3p/7p/p1p1P3/P1P1PP1P/7K w - - bm #23;
7Q/6p1/8/8/1p6/3P3P/2P3pp/4K2k w - - bm #24; c0 "was bm #23";
Expand Down Expand Up @@ -6403,6 +6402,7 @@ rb2b2R/2npk3/p1p3PP/1n2K1N1/6PN/P1p3p1/3p3p/3B2rq w - - bm #31; 00:00 @ C3/R0/K3
8/6B1/4B3/8/1B2p3/4p3/4p1pp/2k1Kbrr w - - bm #31; --:-- @ C2/R0/K7/P1/X6;
1K4kB/6P1/6P1/3r4/8/1R6/B1PPPP2/7R w - - bm #31;
N3k1nR/p1p1Pp2/2P1pPr1/b2pP3/P1pP1K2/2P3p1/6P1/8 w - - bm #31;
2r1b1Q1/6p1/2P5/5P2/1p2K3/pPp5/n2P4/1B2k3 w - - bm #32; c0 "was bm #23";
5n2/B3K3/2p3p1/4k3/7P/3bN1P1/2PrnNP1/1q6 w - - bm #32; 00:00 @ C3/R0/K2/P1/X1;
8/3N4/3K4/1p3p2/bp2kp1p/5rbr/1p1PBp1p/N3R2n w - - bm #32; 00:00 @ C2/R0/K2/P2/X5;
3Q4/8/8/8/k7/8/3p1pp1/3Kbrrb w - - bm #32; 00:00+ @ C2/R0/K4/P1/X3;
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2 changes: 1 addition & 1 deletion matetrackpv.epd
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Expand Up @@ -6295,7 +6295,6 @@ R2n3R/1pn2kBp/4p3/P2pKNr1/4N3/1pP5/6p1/3br3 w - - bm #23; PV: h8f8 f7g6 f8f6 g6h
8/5p1B/2b1pP2/3pP3/2pP4/KpB5/pP6/k7 w - - bm #23; PV: a3b4 c6d7 b4c5 d7b5 c5d6 b5e8 d6e7 e8b5 e7f8 b5e8 f8g7 e8d7 g7h6 d7e8 h6g5 e8d7 g5f4 d7c8 f4e3 c8d7 e3d2 d7e8 d2c1 e8a4 c3b4 a4d7 b4a3 d7a4 h7g6 a4e8 g6h5 e8d7 h5f7 d7c8 f7g6 c8d7 f6f7 d7c8 f7f8q c8b7 f8f1 c4c3 b2c3 b3b2 a3b2;
q1n3r1/8/rbn4p/8/1P6/PQ3P2/1p1Np3/k3K2R w - - bm #23; PV: b3d3 a1a2 d3d5 a2a1 d5f5 a1a2 f5f7 a2a1 f7h7 g8g1 h1g1 a1a2 h7f7 a2a1 f7f5 a1a2 f5d5 a2a1 d5d3 a1a2 d3b3 a2a1 a3a4 a6a4 b3c2 a1a2 c2c4 a2a1 d2b3 a1b1 g1h1 b6g1 b3d2 b1a1 c4d3 a1a2 d3b3 a2a1 h1g1 c6d4 e1f2 e2e1q g1e1 b2b1b b3b1;
2k5/8/1P1P4/8/7p/p1p1p2P/P1P1P2P/b1K5 w - - bm #23; PV: c1d1 a1b2 d1e1 b2c1 e1f1 c1d2 f1g2 d2e1 g2g1 e1d2 g1f1 d2c1 f1e1 c1b2 e1d1 b2a1 d1c1 a1b2 c1b1 c8d7 b6b7 d7d6 b7b8q d6e6 b8d8 e6e5 d8h4 e5d6 h4f6 d6c5 h3h4 c5b5 h4h5 b2c1 b1c1 b5c5 h5h6 c5b5 h6h7 b5c5 h7h8q c5b5 h8h5 b5a4 f6h4;
2r1b1Q1/6p1/2P5/5P2/1p2K3/pPp5/n2P4/1B2k3 w - - bm #23;
8/p1p5/3p4/p3p3/3k1p2/1K2b1p1/1NP4p/7B w - - bm #23; PV: c2c3 d4c5 b2a4 c5b5 c3c4 b5a6 b3c2 e3d4 c2d3 d4b6 d3e2 b6e3 e2f1 e3d4 h1e4 d4f2 f1g2 h2h1q g2h1 f2d4 h1g2 d4e3 g2h3 e3d2 h3g4 f4f3 e4f3 e5e4 f3e4 g3g2 e4g2 c7c6 g2c6 d2c3 g4f5 c3d2 f5e6 d2f4 c6a8 f4e5 e6d5 e5b2 d5c6 d6d5 a4c5;
R1n4k/n1p5/pb1p1N1P/3P3p/7p/p1p1P3/P1P1PP1P/7K w - - bm #23; PV: a8b8 h4h3 h1g1 b6c5 b8b1 c8b6 g1h1 b6d7 f6d7 h8h7 d7c5 d6c5 d5d6 c7d6 b1b7 h7h6 b7a7 d6d5 a7a6 h6g5 a6a3 g5f5 a3b3 d5d4 e3d4 c5d4 h1g1 f5e6 a2a4 h5h4 a4a5 e6d7 a5a6 d4d3 e2d3 d7d6 a6a7 d6c7 a7a8q c7d7 a8a6 d7e7 b3b7 e7d8 a6a8;
7Q/6p1/8/8/1p6/3P3P/2P3pp/4K2k w - - bm #24; PV: h8a8 h1g1 a8a7 g1h1 a7b7 h1g1 b7b6 g1h1 b6c6 h1g1 c6c5 g1h1 c5d5 h1g1 d5d4 g1h1 d4e4 h1g1 e4e3 g1h1 e3f3 h1g1 e1e2 g7g6 f3g4 g1h1 g4e4 h1g1 e4d4 g1h1 d4d5 h1g1 d5c5 g1h1 c5c6 h1g1 c6b6 g1h1 b6b7 h1g1 b7a7 g1h1 a7a8 g6g5 e2f2 g5g4 a8g2;
Expand Down Expand Up @@ -6403,6 +6402,7 @@ rb2b2R/2npk3/p1p3PP/1n2K1N1/6PN/P1p3p1/3p3p/3B2rq w - - bm #31; PV: h4f5 e7d8 g5
8/6B1/4B3/8/1B2p3/4p3/4p1pp/2k1Kbrr w - - bm #31; PV: e6a2 c1c2 b4a3 c2d3 a2b1 d3c4 b1c2 c4b5 c2b3 b5a6 a3b4 a6b5 g7c3 b5c6 b3c4 c6c7 c3d4 c7b7 b4c5 b7c8 c4d5 c8c7 d4e5 c7d7 c5f8 d7c8 f8d6 c8d7 d5b7 d7e8 e5f6 e8d7 f6e7 d7e6 b7c6 e6f7 c6d7 f7g7 d7e6 g7h7 d6e5 h7g6 e7f8 g6h7 e5c3 h7g6 e6g8 g6f5 g8f7 f5g5 f8g7 g5f4 g7f6 f4g4 f7g6 g4f3 c3e5 f3g4 f6e7 g4f3 g6h5;
1K4kB/6P1/6P1/3r4/8/1R6/B1PPPP2/7R w - - bm #31; PV: h1c1 d5d8 b8b7 d8d7 b7b6 d7d6 b6c5 d6d5 c5b4 d5b5 b4c3 b5c5 c3d3 c5d5 d3e3 d5e5 e3f3 e5f5 f3g2 f5f2 g2g3 f2g2 g3f3 g2g3 f3f2 g3g2 f2e3 g2g3 e3d4 g3g4 e2e4 g4e4 d4c3 e4c4 c3d3 c4d4 d3e2 d4d2 e2e3 d2e2 e3d3 e2e3 d3d2 e3e2 d2c3 e2c2 c3b4 c2c4 b4a5 c4a4 a5b6 a4c4 b6b7 c4c7 b7b8 c7c4 c1c3 c4c5 b3b1 c5c4 a2c4;
N3k1nR/p1p1Pp2/2P1pPr1/b2pP3/P1pP1K2/2P3p1/6P1/8 w - - bm #31; PV: f4e3 g6g4 e3e2 g4g6 e2d1 g6g4 d1c1 g4g6 c1c2 g6g4 c2d1 g4g5 d1d2 g5g6 d2e2 g6g4 e2e3 g4g5 e3f3 g5g6 f3f4 a7a6 f4f3 g6g5 f3e2 g5g6 e2d2 g6g5 d2c1 g5g6 c1c2 g6g4 c2d1 g4g5 d1d2 g5g6 d2e2 g6g4 e2e3 g4g5 e3f3 g5g6 f3f4 a5b6 a8b6 a6a5 f4f3 c7b6 c6c7 e8d7 e7e8q d7c7 e8f7 c7c6 h8h7 g8e7 f7e7 g6g7 h7g7 b6b5 e7c5;
2r1b1Q1/6p1/2P5/5P2/1p2K3/pPp5/n2P4/1B2k3 w - - bm #32; PV: g8e6 e8f7 e6c8 c3d2 b1c2 a2c3 e4e3 a3a2 c8a6 f7e8 c6c7 e8d7 a6d6 d2d1n c2d1 c3d1 e3f3 a2a1q d6e7 e1d2 e7d7 d2c2 c7c8q d1c3 c8c5 a1h1 f3g3 h1c1 d7g7 c2b2 c5f2 b2a3 g7a7 a3b3 f2e3 c1f1 e3e6 b3c2 a7e3 b4b3 e6c6 f1d3 c6g2 d3e2 g2e2 c3e2 e3e2 c2c3 f5f6 b3b2 e2d1 b2b1q d1b1 c3c4 b1c2 c4b5 f6f7 b5b6 f7f8q b6b7 f8b4 b7a6 c2a2;
5n2/B3K3/2p3p1/4k3/7P/3bN1P1/2PrnNP1/1q6 w - - bm #32; PV: f2g4 e5e4 g4f6 e4e5 e3g4 e5f5 g4h6 f5e5 h6f7 e5f5 f7d6 f5e5 f6g4 e5d5 g4e3 d5e5 d6f7 e5e4 f7g5 e4e5 g5f3 e5e4 f3d2 e4e5 d2f3 e5e4 f3g5 e4e5 g5f7 e5e4 f7d6 e4e5 e3g4 e5d5 g4f6 d5e5 d6f7 e5f5 f7h6 f5e5 h6g4 e5f5 g4e3 f5e5 f6g4 e5e4 g4f2 e4e5 f2d3 e5e4 d3f2 e4e5 f2g4 e5e4 g4f6 e4e5 e3c4 e5f5 c4d6 f5e5 f6g4 e5d5 c2c4;
8/3N4/3K4/1p3p2/bp2kp1p/5rbr/1p1PBp1p/N3R2n w - - bm #32; PV: d7c5 e4d4 c5e6 d4e4 e6g5 e4d4 g5f3 d4e4 f3g5 e4d4 g5e6 d4e4 e6c5 e4d4 a1b3 a4b3 c5b3 d4e4 b3c5 e4d4 c5e6 d4e4 e6g5 e4d4 g5f3 d4e4 e1f1 b4b3 f3g5 e4d4 g5e6 d4e4 e6c5 e4d4 c5b3 d4e4 b3c5 e4d4 c5e6 d4e4 e6g5 e4d4 g5f3 d4e4 d6c5 b5b4 c5c6 b4b3 c6d6 b2b1r f1b1 f2f1b f3g5 e4d4 g5e6 d4e4 e6c5 e4d4 c5b3 d4e4 b3c5 e4d4 b1b4;
3Q4/8/8/8/k7/8/3p1pp1/3Kbrrb w - - bm #32; PV: d8a8 a4b3 a8a1 b3b4 a1a2 b4b5 a2a3 b5b6 a3a4 b6b7 a4a5 b7c6 a5b4 c6c7 b4b5 c7d6 b5c4 d6d7 c4c5 d7e6 c5d4 e6e7 d4d5 e7f6 d5d6 f6f7 d6e5 f7f8 e5e6 f8g7 e6f5 g7h8 f5g5 h8h7 g5e5 h7g8 e5f6 g8h7 f6f8 h7g6 f8e7 g6f5 e7d6 f5e4 d6c5 e4d3 c5b4 d3e3 b4c4 e3f3 c4d4 f3g3 d4e4 g3h3 e4e6 h3g3 e6f5 g3h4 f5g6 h4h3 g6g5 h3h2 g5h4;
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