Once I implemented perft for my engine and found a decent sized test suite, my quality of life improved quite a bit! It was so nice to be able to refactor code in move generation and make/unmake move with the protection of that test suite in place.
I'm curious what people are using to accomplish something similar with search. I know I need to add some diagnostic stats to my search, then I suppose I could collect a number of starting positions and ensure that it finds moves appropriately. It seems unlikely there's a standardized test suite given the variances in engines and the moves they may think are best at various ply, etc., but if there are some ideas you've used that have worked well, I'd love to hear about them, and I expect most other newbies would also.
I'm about to embark on a pretty large refactoring, and my engine is actually performing very well currently (according to my goals), so I think it makes sense to put enough tests in place beforehand so I can know if I'm slowing it down too much, or breaking it. As an example, I recently fixed a problem where I was scoring stalemate similarly to checkmate (with predictable results!), I should've had a test in place that would've caught that.
Search testing strategies
Moderators: hgm, Rebel, chrisw
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lojic
- Posts: 71
- Joined: Thu Jan 28, 2021 9:50 pm
- Full name: Brian Adkins
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lojic
- Posts: 71
- Joined: Thu Jan 28, 2021 9:50 pm
- Full name: Brian Adkins
Re: Search testing strategies
I whipped up an example test that would've caught that scoring problem:
Code: Select all
;; Create a board position where stalemate would occur if white
;; moves the "a" pawn instead of the "h" pawn.
(match-let* ([ b (fen->board "k7/8/PK6/8/8/7P/8/8 w - - 0 100") ]
[ (cons score move) (search b 9 1) ] ; Search to depth 9
[ src-idx (move-src-idx move) ])
(check-not-equal? src-idx (pos->idx "a6")) ; Don't move the a6 pawn
(check-equal? src-idx (pos->idx "h3")) ; Do move the h3 pawn
(check-not-false (> score 900))) ; White wins a queen
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emadsen
- Posts: 434
- Joined: Thu Apr 26, 2012 1:51 am
- Location: Oak Park, IL, USA
- Full name: Erik Madsen
Re: Search testing strategies
Amen.
If the "debug on" command is sent to my engine, it displays some metrics.I'm curious what people are using to accomplish something similar with search... If there are some ideas you've used that have worked well[/b], I'd love to hear about them, and I expect most other newbies would also.
Code: Select all
info multipv 1 depth 18 seldepth 24 time 1296 nodes 3618983 score cp 549 nps 2793376 pv f3c6 f6d5 c6d7 c8d7 c2c3 d5b6 a4b6 f8c5 g1h1 c5b6 d1d6 b6d8 d6d4 d8f6 d4b4 g7g6 h1g1 f6e7
info hashfull 10 currmove a1c1 currmovenumber 41
info string Null Move Cutoffs = 73.05% Beta Cutoff Move Number = 1.36 Beta Cutoff First Move = 87.79%
info string Evals = 717595
info string Stopping search at 1296 milliseconds.
Code: Select all
analyzepositions "C:\Users\Erik\Documents\Chess\Tests\WinAtChess.epd" 3000
Number Position Solution Expected Moves Move Correct Pct
====== =========================================================================== ======== ================ ===== ======= =====
1 2rr3k/pp3pp1/1nnqbN1p/3pN3/2pP4/2P3Q1/PPB4P/R4RK1 w - - Best g3g6 g3g6 True 100.0
2 8/7p/5k2/5p2/p1p2P2/Pr1pPK2/1P1R3P/8 b - - Best b3b2 c4c3 False 50.0
3 5rk1/1ppb3p/p1pb4/6q1/3P1p1r/2P1R2P/PP1BQ1P1/5RKN w - - Best e3g3 e3g3 True 66.7
4 r1bq2rk/pp3pbp/2p1p1pQ/7P/3P4/2PB1N2/PP3PPR/2KR4 w - - Best h6h7 h6h7 True 75.0
5 5k2/6pp/p1qN4/1p1p4/3P4/2PKP2Q/PP3r2/3R4 b - - Best c6c4 c6c4 True 80.0
6 7k/p7/1R5K/6r1/6p1/6P1/8/8 w - - Best b6b7 b6b7 True 83.3
7 rnbqkb1r/pppp1ppp/8/4P3/6n1/7P/PPPNPPP1/R1BQKBNR b KQkq - Best g4e3 g4e3 True 85.7
8 r4q1k/p2bR1rp/2p2Q1N/5p2/5p2/2P5/PP3PPP/R5K1 w - - Best e7f7 e7f7 True 87.5
9 3q1rk1/p4pp1/2pb3p/3p4/6Pr/1PNQ4/P1PB1PP1/4RRK1 b - - Best d6h2 d6h2 True 88.9
10 2br2k1/2q3rn/p2NppQ1/2p1P3/Pp5R/4P3/1P3PPP/3R2K1 w - - Best h4h7 h4h7 True 90.0
11 r1b1kb1r/3q1ppp/pBp1pn2/8/Np3P2/5B2/PPP3PP/R2Q1RK1 w kq - Best f3c6 f3c6 True 90.9
12 4k1r1/2p3r1/1pR1p3/3pP2p/3P2qP/P4N2/1PQ4P/5R1K b - - Best g4f3 g4f3 True 91.7
13 5rk1/pp4p1/2n1p2p/2Npq3/2p5/6P1/P3P1BP/R4Q1K w - - Best f1f8 f1f8 True 92.3
14 r2rb1k1/pp1q1p1p/2n1p1p1/2bp4/5P2/PP1BPR1Q/1BPN2PP/R5K1 w - - Best h3h7 h3h7 True 92.9
15 1R6/1brk2p1/4p2p/p1P1Pp2/P7/6P1/1P4P1/2R3K1 w - - Best b8b7 b8b7 True 93.3
16 r4rk1/ppp2ppp/2n5/2bqp3/8/P2PB3/1PP1NPPP/R2Q1RK1 w - - Best e2c3 e2c3 True 93.8
17 1k5r/pppbn1pp/4q1r1/1P3p2/2NPp3/1QP5/P4PPP/R1B1R1K1 w - - Best c4e5 c4e5 True 94.1
18 R7/P4k2/8/8/8/8/r7/6K1 w - - Best a8h8 a8h8 True 94.4
19 r1b2rk1/ppbn1ppp/4p3/1QP4q/3P4/N4N2/5PPP/R1B2RK1 w - - Best c5c6 c5c6 True 94.7
20 r2qkb1r/1ppb1ppp/p7/4p3/P1Q1P3/2P5/5PPP/R1B2KNR b kq - Best d7b5 d7b5 True 95.0
21 5rk1/1b3p1p/pp3p2/3n1N2/1P6/P1qB1PP1/3Q3P/4R1K1 w - - Best d2h6 d2h6 True 95.2
22 r1bqk2r/ppp1nppp/4p3/n5N1/2BPp3/P1P5/2P2PPP/R1BQK2R w KQkq - Best c4a2 g5f7 g5f7 True 95.5
23 r3nrk1/2p2p1p/p1p1b1p1/2NpPq2/3R4/P1N1Q3/1PP2PPP/4R1K1 w - - Best g2g4 g2g4 True 95.7
24 6k1/1b1nqpbp/pp4p1/5P2/1PN5/4Q3/P5PP/1B2B1K1 b - - Best g7d4 g7d4 True 95.8
25 3R1rk1/8/5Qpp/2p5/2P1p1q1/P3P3/1P2PK2/8 b - - Best g4h4 g4h4 True 96.0
26 3r2k1/1p1b1pp1/pq5p/8/3NR3/2PQ3P/PP3PP1/6K1 b - - Best d7f5 d7f5 True 96.2
27 7k/pp4np/2p3p1/3pN1q1/3P4/Q7/1r3rPP/2R2RK1 w - - Best a3f8 a3f8 True 96.3
28 1r1r2k1/4pp1p/2p1b1p1/p3R3/RqBP4/4P3/1PQ2PPP/6K1 b - - Best b4e1 b4e1 True 96.4
29 r2q2k1/pp1rbppp/4pn2/2P5/1P3B2/6P1/P3QPBP/1R3RK1 w - - Best c5c6 c5c6 True 96.6
30 1r3r2/4q1kp/b1pp2p1/5p2/pPn1N3/6P1/P3PPBP/2QRR1K1 w - - Best e4d6 e4d6 True 96.7
31 rb3qk1/pQ3ppp/4p3/3P4/8/1P3N2/1P3PPP/3R2K1 w - - Best b7a8 d5d6 d5e6 g2g3 False 93.5
32 6k1/p4p1p/1p3np1/2q5/4p3/4P1N1/PP3PPP/3Q2K1 w - - Best d1d8 d1d8 True 93.8
33 8/p1q2pkp/2Pr2p1/8/P3Q3/6P1/5P1P/2R3K1 w - - Best e4e5 e4f4 e4e5 True 93.9
34 7k/1b1r2p1/p6p/1p2qN2/3bP3/3Q4/P5PP/1B1R3K b - - Best d4g1 d4g1 True 94.1
35 r3r2k/2R3pp/pp1q1p2/8/3P3R/7P/PP3PP1/3Q2K1 w - - Best h4h7 h4h7 True 94.3
36 3r4/2p1rk2/1pQq1pp1/7p/1P1P4/P4P2/6PP/R1R3K1 b - - Best e7e1 e7e1 True 94.4
37 2r5/2rk2pp/1pn1pb2/pN1p4/P2P4/1N2B3/nPR1KPPP/3R4 b - - Best c6d4 c6d4 True 94.6
38 4k3/p4prp/1p6/2b5/8/2Q3P1/P2R1PKP/4q3 w - - Best d2d8 d2d8 True 94.7
39 r1br2k1/pp2bppp/2nppn2/8/2P1PB2/2N2P2/PqN1B1PP/R2Q1R1K w - - Best c3a4 c3a4 True 94.9
40 3r1r1k/1p4pp/p4p2/8/1PQR4/6Pq/P3PP2/2R3K1 b - - Best d8c8 d8c8 True 95.0
41 1k6/5RP1/1P6/1K6/6r1/8/8/8 w - - Best b5a5 b5c5 b5a5 True 95.1
42 r1b1r1k1/pp1n1pbp/1qp3p1/3p4/1B1P4/Q3PN2/PP2BPPP/R4RK1 w - - Best b4a5 b4a5 True 95.2
43 r2q3k/p2P3p/1p3p2/3QP1r1/8/B7/P5PP/2R3K1 w - - Best a3e7 d5a8 a3e7 True 95.3
44 3rb1k1/pq3pbp/4n1p1/3p4/2N5/2P2QB1/PP3PPP/1B1R2K1 b - - Best d5c4 d5c4 True 95.5
45 7k/2p1b1pp/8/1p2P3/1P3r2/2P3Q1/1P5P/R4qBK b - - Best f1a1 f1a1 True 95.6
46 r1bqr1k1/pp1nb1p1/4p2p/3p1p2/3P4/P1N1PNP1/1PQ2PP1/3RKB1R w K - Best c3b5 c3b5 True 95.7
47 r1b2rk1/pp2bppp/2n1pn2/q5B1/2BP4/2N2N2/PP2QPPP/2R2RK1 b - - Best c6d4 c6d4 True 95.7
48 1rbq1rk1/p1p1bppp/2p2n2/8/Q1BP4/2N5/PP3PPP/R1B2RK1 b - - Best b8b4 b8b4 True 95.8
49 2b3k1/4rrpp/p2p4/2pP2RQ/1pP1Pp1N/1P3P1P/1q6/6RK w - - Best h5h7 h5h7 True 95.9
50 k4r2/1R4pb/1pQp1n1p/3P4/5p1P/3P2P1/r1q1R2K/8 w - - Best b7b6 b7b6 True 96.0
51 r1bq1r2/pp4k1/4p2p/3pPp1Q/3N1R1P/2PB4/6P1/6K1 w - - Best f4g4 f4g4 True 96.1
52 r1k5/1p3q2/1Qpb4/3N1p2/5Pp1/3P2Pp/PPPK3P/4R3 w - - Best e1e7 e1e7 True 96.2
53 6k1/6p1/p7/3Pn3/5p2/4rBqP/P4RP1/5QK1 b - - Best e3e1 e3e1 True 96.2
54 r3kr2/1pp4p/1p1p4/7q/4P1n1/2PP2Q1/PP4P1/R1BB2K1 b q - Best h5h1 h5h1 True 96.3
55 r3r1k1/pp1q1pp1/4b1p1/3p2B1/3Q1R2/8/PPP3PP/4R1K1 w - - Best d4g7 g5h4 False 94.5
56 r1bqk2r/pppp1ppp/5n2/2b1n3/4P3/1BP3Q1/PP3PPP/RNB1K1NR b KQkq - Best c5f2 c5f2 True 94.6
57 r3q1kr/ppp5/3p2pQ/8/3PP1b1/5R2/PPP3P1/5RK1 w - - Best f3f8 f3f8 True 94.7
58 8/8/2R5/1p2qp1k/1P2r3/2PQ2P1/5K2/8 w - - Best d3d1 d3d1 True 94.8
59 r1b2rk1/2p1qnbp/p1pp2p1/5p2/2PQP3/1PN2N1P/PB3PP1/3R1RK1 w - - Best c3d5 c3d5 True 94.9
60 rn1qr1k1/1p2np2/2p3p1/8/1pPb4/7Q/PB1P1PP1/2KR1B1R w - - Best h3h8 h3h8 True 95.0
61 3qrbk1/ppp1r2n/3pP2p/3P4/2P4P/1P3Q2/PB6/R4R1K w - - Best f3f7 f3f7 True 95.1
62 6r1/3Pn1qk/p1p1P1rp/2Q2p2/2P5/1P4P1/P3R2P/5RK1 b - - Best g6g3 g6g3 True 95.2
63 r1brnbk1/ppq2pp1/4p2p/4N3/3P4/P1PB1Q2/3B1PPP/R3R1K1 w - - Best e5f7 e5f7 True 95.2
64 8/6pp/3q1p2/3n1k2/1P6/3NQ2P/5PP1/6K1 w - - Best g2g4 g2g4 True 95.3
65 1r1r1qk1/p2n1p1p/bp1Pn1pQ/2pNp3/2P2P1N/1P5B/P6P/3R1RK1 w - - Best d5e7 d5e7 True 95.4
66 1k1r2r1/ppq5/1bp4p/3pQ3/8/2P2N2/PP4P1/R4R1K b - - Best c7e5 c7e5 True 95.5
67 3r2k1/p2q4/1p4p1/3rRp1p/5P1P/6PK/P3R3/3Q4 w - - Best e5d5 e5d5 True 95.5
68 6k1/5ppp/1q6/2b5/8/2R1pPP1/1P2Q2P/7K w - - Best e2e3 e2e3 True 95.6
69 2k5/pppr4/4R3/4Q3/2pp2q1/8/PPP2PPP/6K1 w - - Best f2f3 h2h3 f2f3 True 95.7
70 2kr3r/pppq1ppp/3p1n2/bQ2p3/1n1PP3/1PN1BN1P/1PP2PP1/2KR3R b - - Best b4a2 b4a2 True 95.7
71 2kr3r/pp1q1ppp/5n2/1Nb5/2Pp1B2/7Q/P4PPP/1R3RK1 w - - Best b5a7 b5a7 True 95.8
72 r3r1k1/pp1n1ppp/2p5/4Pb2/2B2P2/B1P5/P5PP/R2R2K1 w - - Best e5e6 e5e6 True 95.8
73 r1q3rk/1ppbb1p1/4Np1p/p3pP2/P3P3/2N4R/1PP1Q1PP/3R2K1 w - - Best e2d2 e2d2 True 95.9
74 5r1k/pp4pp/2p5/2b1P3/4Pq2/1PB1p3/P3Q1PP/3N2K1 b - - Best f4f1 f4f1 True 95.9
75 r3r1k1/pppq1ppp/8/8/1Q4n1/7P/PPP2PP1/RNB1R1K1 b - - Best d7d6 d7d6 True 96.0
76 r1b1qrk1/2p2ppp/pb1pnn2/1p2pNB1/3PP3/1BP5/PP2QPPP/RN1R2K1 w - - Best g5f6 g5f6 True 96.1
77 3r2k1/ppp2ppp/6q1/b4n2/3nQB2/2p5/P4PPP/RN3RK1 b - - Best f5g3 f5g3 True 96.1
78 r2q3r/ppp2k2/4nbp1/5Q1p/2P1NB2/8/PP3P1P/3RR1K1 w - - Best e4g5 e4g5 True 96.2
79 r3k2r/pbp2pp1/3b1n2/1p6/3P3p/1B2N1Pq/PP1PQP1P/R1B2RK1 b kq - Best h3h2 h3h2 True 96.2
80 r4rk1/p1B1bpp1/1p2pn1p/8/2PP4/3B1P2/qP2QP1P/3R1RK1 w - - Best d1a1 d1a1 True 96.3
81 r4rk1/1bR1bppp/4pn2/1p2N3/1P6/P3P3/4BPPP/3R2K1 b - - Best e7d6 b7e4 False 95.1
82 3rr1k1/pp3pp1/4b3/8/2P1B2R/6QP/P3q1P1/5R1K w - - Best e4h7 e4h7 True 95.1
83 3rr1k1/ppqbRppp/2p5/8/3Q1n2/2P3N1/PPB2PPP/3R2K1 w - - Best d4d7 d4d7 True 95.2
84 r2q1r1k/2p1b1pp/p1n5/1p1Q1bN1/4n3/1BP1B3/PP3PPP/R4RK1 w - - Best d5g8 d5g8 True 95.2
85 kr2R3/p4r2/2pq4/2N2p1p/3P2p1/Q5P1/5P1P/5BK1 w - - Best c5a6 c5a6 True 95.3
86 8/p7/1ppk1n2/5ppp/P1PP4/2P1K1P1/5N1P/8 b - - Best f6g4 f6g4 True 95.3
87 8/p3k1p1/4r3/2ppNpp1/PP1P4/2P3KP/5P2/8 b - - Best e6e5 e6e5 True 95.4
88 r6k/p1Q4p/2p1b1rq/4p3/B3P3/4P3/PPP3P1/4RRK1 b - - Best g6g2 g6g2 True 95.5
89 1r3b1k/p4rpp/4pp2/3q4/2ppbPPQ/6RK/PP5P/2B1NR2 b - - Best g7g5 g7g5 True 95.5
90 3qrrk1/1pp2pp1/1p2bn1p/5N2/2P5/P1P3B1/1P4PP/2Q1RRK1 w - - Best f5g7 f5g7 True 95.6
91 2qr2k1/4b1p1/2p2p1p/1pP1p3/p2nP3/PbQNB1PP/1P3PK1/4RB2 b - - Best b3e6 b3e6 True 95.6
92 r4rk1/1p2ppbp/p2pbnp1/q7/3BPPP1/2N2B2/PPP4P/R2Q1RK1 b - - Best e6g4 e6g4 True 95.7
93 r1b1k1nr/pp3pQp/4pq2/3pn3/8/P1P5/2P2PPP/R1B1KBNR w KQkq - Best c1h6 c1h6 True 95.7
94 8/k7/p7/3Qp2P/n1P5/3KP3/1q6/8 b - - Best e5e4 e5e4 True 95.7
95 2r5/1r6/4pNpk/3pP1qp/8/2P1QP2/5PK1/R7 w - - Best f6g4 f6g4 True 95.8
96 r1b4k/ppp2Bb1/6Pp/3pP3/1qnP1p1Q/8/PPP3P1/1K1R3R w - - Best h4d8 h4d8 True 95.8
97 6k1/5p2/p5np/4B3/3P4/1PP1q3/P3r1QP/6RK w - - Best g2a8 g2a8 True 95.9
98 1r3rk1/5pb1/p2p2p1/Q1n1q2p/1NP1P3/3p1P1B/PP1R3P/1K2R3 b - - Best c5e4 c5e4 True 95.9
99 r1bq1r1k/1pp1Np1p/p2p2pQ/4R3/n7/8/PPPP1PPP/R1B3K1 w - - Best e5h5 e5h5 True 96.0
100 8/k1b5/P4p2/1Pp2p1p/K1P2P1P/8/3B4/8 w - - Best b5b6 b5b6 True 96.0
101 5rk1/p5pp/8/8/2Pbp3/1P4P1/7P/4RN1K b - - Best d4c3 d4c3 True 96.0
102 2Q2n2/2R4p/1p1qpp1k/8/3P3P/3B2P1/5PK1/r7 w - - Best c8f8 c8f8 True 96.1
103 6k1/2pb1r1p/3p1PpQ/p1nPp3/1q2P3/2N2P2/PrB5/2K3RR w - - Best h6g6 h6g6 True 96.1
104 b4r1k/pq2rp2/1p1bpn1p/3PN2n/2P2P2/P2B3K/1B2Q2N/3R2R1 w - - Best e2h5 e2h5 True 96.2
105 r2r2k1/pb3ppp/1p1bp3/7q/3n2nP/PP1B2P1/1B1N1P2/RQ2NRK1 b - - Best h5h4 h5h4 True 96.2
106 4rrk1/pppb4/7p/3P2pq/3Qn3/P5P1/1PP4P/R3RNNK b - - Best e4f2 e4f2 True 96.2
107 5n2/pRrk2p1/P4p1p/4p3/3N4/5P2/6PP/6K1 w - - Best d4b5 d4b5 True 96.3
108 r5k1/1q4pp/2p5/p1Q5/2P5/5R2/4RKPP/r7 w - - Best c5e5 c5e5 True 96.3
109 rn2k1nr/pbp2ppp/3q4/1p2N3/2p5/QP6/PB1PPPPP/R3KB1R b KQkq - Best c4c3 c4c3 True 96.3
110 2kr4/bp3p2/p2p2b1/P7/2q5/1N4B1/1PPQ2P1/2KR4 b - - Best a7e3 a7e3 True 96.4
111 6k1/p5p1/5p2/2P2Q2/3pN2p/3PbK1P/7P/6q1 b - - Best g1f1 g1f1 True 96.4
112 r4kr1/ppp5/4bq1b/7B/2PR1Q1p/2N3P1/PP3P1P/2K1R3 w - - Best e1e6 e1e6 True 96.4
113 rnbqkb1r/1p3ppp/5N2/1p2p1B1/2P5/8/PP2PPPP/R2QKB1R b KQkq - Best d8f6 d8f6 True 96.5
114 r1b1rnk1/1p4pp/p1p2p2/3pN2n/3P1PPq/2NBPR1P/PPQ5/2R3K1 w - - Best d3h7 d3h7 True 96.5
115 4N2k/5rpp/1Q6/p3q3/8/P5P1/1P3P1P/5K2 w - - Best e8d6 e8d6 True 96.5
116 r2r2k1/2p2ppp/p7/1p2P1n1/P6q/5P2/1PB1QP1P/R5RK b - - Best d8d2 d8d2 True 96.6
117 3r1rk1/q4ppp/p1Rnp3/8/1p6/1N3P2/PP3QPP/3R2K1 b - - Best d6e4 d6e4 True 96.6
118 r5k1/pb2rpp1/1p6/2p4q/5R2/2PB2Q1/P1P3PP/5R1K w - - Best f4h4 f4h4 True 96.6
119 r2qr1k1/p1p2ppp/2p5/2b5/4nPQ1/3B4/PPP3PP/R1B2R1K b - - Best d8d3 d8d3 True 96.6
120 r4rk1/1bn2qnp/3p1B1Q/p2P1pP1/1pp5/5N1P/PPB2P2/2KR3R w - - Best g5g6 g5g6 True 96.7
121 6k1/5p1p/2bP2pb/4p3/2P5/1p1pNPPP/1P1Q1BK1/1q6 b - - Best c6f3 c6f3 True 96.7
122 1k6/ppp4p/1n2pq2/1N2Rb2/2P2Q2/8/P4KPP/3r1B2 b - - Best d1f1 d1f1 True 96.7
123 6k1/1b2rp2/1p4p1/3P4/PQ4P1/2N2q2/5P2/3R2K1 b - - Best b7d5 e7c7 b7d5 True 96.7
124 6k1/3r4/2R5/P5P1/1P4p1/8/4rB2/6K1 b - - Best g4g3 g4g3 True 96.8
125 r1bqr1k1/pp3ppp/1bp5/3n4/3B4/2N2P1P/PPP1B1P1/R2Q1RK1 b - - Best b6d4 b6d4 True 96.8
126 r5r1/pQ5p/1qp2R2/2k1p3/4P3/2PP4/P1P3PP/6K1 w - - Best f6c6 f6c6 True 96.8
127 2k4r/1pr1n3/p1p1q2p/5pp1/3P1P2/P1P1P3/1R2Q1PP/1RB3K1 w - - Best b2b7 b2b7 True 96.9
128 6rk/1pp2Qrp/3p1B2/1pb1p2R/3n1q2/3P4/PPP3PP/R6K w - - Best f7g6 f7g6 True 96.9
129 3r1r1k/1b2b1p1/1p5p/2p1Pp2/q1B2P2/4P2P/1BR1Q2K/6R1 b - - Best b7f3 b7f3 True 96.9
130 6k1/1pp3q1/5r2/1PPp4/3P1pP1/3Qn2P/3B4/4R1K1 b - - Best g7h6 g7h8 g7h6 True 96.9
131 2rq1bk1/p4p1p/1p4p1/3b4/3B1Q2/8/P4PpP/3RR1K1 w - - Best e1e8 e1e8 True 96.9
132 4r1k1/5bpp/2p5/3pr3/8/1B3pPq/PPR2P2/2R2QK1 b - - Best e5e1 e5e1 True 97.0
133 r1b1k2r/1pp1q2p/p1n3p1/3QPp2/8/1BP3B1/P5PP/3R1RK1 w kq - Best g3h4 g3h4 True 97.0
134 3r2k1/p6p/2Q3p1/4q3/2P1p3/P3Pb2/1P3P1P/2K2BR1 b - - Best d8d1 d8d1 True 97.0
135 3r1r1k/N2qn1pp/1p2np2/2p5/2Q1P2N/3P4/PP4PP/3R1RK1 b - - Best e6d4 e6d4 True 97.0
136 6kr/1q2r1p1/1p2N1Q1/5p2/1P1p4/6R1/7P/2R3K1 w - - Best c1c8 c1c8 True 97.1
137 3b1rk1/1bq3pp/5pn1/1p2rN2/2p1p3/2P1B2Q/1PB2PPP/R2R2K1 w - - Best d1d7 d1d7 True 97.1
138 r1bq3r/ppppR1p1/5n1k/3P4/6pP/3Q4/PP1N1PP1/5K1R w - - Best h4h5 h4h5 True 97.1
139 rnb3kr/ppp2ppp/1b6/3q4/3pN3/Q4N2/PPP2KPP/R1B1R3 w - - Best e4f6 e4f6 True 97.1
140 r2b1rk1/pq4p1/4ppQP/3pB1p1/3P4/2R5/PP3PP1/5RK1 w - - Best c3c7 c3c7 True 97.1
141 4r1k1/p1qr1p2/2pb1Bp1/1p5p/3P1n1R/1B3P2/PP3PK1/2Q4R w - - Best c1f4 g2f1 False 96.5
142 r2q3n/ppp2pk1/3p4/5Pr1/2NP1Qp1/2P2pP1/PP3K2/4R2R w - - Best e1e8 f5f6 e1e8 True 96.5
143 5b2/pp2r1pk/2pp1pRp/4rP1N/2P1P3/1P4QP/P3q1P1/5R1K w - - Best g6h6 g6h6 True 96.5
144 r2q1rk1/pp3ppp/2p2b2/8/B2pPPb1/7P/PPP1N1P1/R2Q1RK1 b - - Best d4d3 d4d3 True 96.5
145 r1bq4/1p4kp/3p1n2/p4pB1/2pQ4/8/1P4PP/4RRK1 w - - Best e1e8 e1e8 True 96.6
146 8/8/2Kp4/3P1B2/2P2k2/5p2/8/8 w - - Best f5c8 f5c8 True 96.6
147 r2r2k1/ppqbppbp/2n2np1/2pp4/6P1/1P1PPNNP/PBP2PB1/R2QK2R b KQ - Best f6g4 f6g4 True 96.6
148 2r1k3/6pr/p1nBP3/1p3p1p/2q5/2P5/P1R4P/K2Q2R1 w - - Best g1g7 g1g7 True 96.6
149 6k1/6p1/2p4p/4Pp2/4b1qP/2Br4/1P2RQPK/8 b - - Best e4g2 e4g2 True 96.6
150 r3r1k1/5p2/pQ1b2pB/1p6/4p3/6P1/Pq2BP1P/2R3K1 b - - Best d6a3 d6f8 e4e3 e4e3 True 96.7
151 8/3b2kp/4p1p1/pr1n4/N1N4P/1P4P1/1K3P2/3R4 w - - Best a4c3 a4c3 True 96.7
152 1br2rk1/1pqb1ppp/p3pn2/8/1P6/P1N1PN1P/1B3PP1/1QRR2K1 w - - Best c3e4 c3e4 True 96.7
153 2r3k1/q4ppp/p3p3/pnNp4/2rP4/2P2P2/4R1PP/2R1Q1K1 b - - Best b5d4 b5d4 True 96.7
154 r1b2rk1/2p2ppp/p7/1p6/3P3q/1BP3bP/PP3QP1/RNB1R1K1 w - - Best f2f7 f2f7 True 96.8
155 5bk1/1rQ4p/5pp1/2pP4/3n1PP1/7P/1q3BB1/4R1K1 w - - Best d5d6 d5d6 True 96.8
156 r1b1qN1k/1pp3p1/p2p3n/4p1B1/8/1BP4Q/PP3KPP/8 w - - Best h3h6 h3h6 True 96.8
157 5rk1/p4ppp/2p1b3/3Nq3/4P1n1/1p1B2QP/1PPr2P1/1K2R2R w - - Best d5e7 d5e7 True 96.8
158 5rk1/n1p1R1bp/p2p4/1qpP1QB1/7P/2P3P1/PP3P2/6K1 w - - Best e7g7 e7g7 True 96.8
159 r1b2r2/5P1p/ppn3pk/2p1p1Nq/1bP1PQ2/3P4/PB4BP/1R3RK1 w - - Best g5e6 g5e6 True 96.9
160 qn1kr2r/1pRbb3/pP5p/P2pP1pP/3N1pQ1/3B4/3B1PP1/R5K1 w - - Best g4d7 g4d7 True 96.9
161 3r3k/3r1P1p/pp1Nn3/2pp4/7Q/6R1/Pq4PP/5RK1 w - - Best h4d8 h4d8 True 96.9
162 r3kbnr/p4ppp/2p1p3/8/Q1B3b1/2N1B3/PP3PqP/R3K2R w KQkq - Best c4d5 c4d5 True 96.9
163 5rk1/2p4p/2p4r/3P4/4p1b1/1Q2NqPp/PP3P1K/R4R2 b - - Best f3g2 c6d5 False 96.3
164 8/6pp/4p3/1p1n4/1NbkN1P1/P4P1P/1PR3K1/r7 w - - Best c2c4 c2c4 True 96.3
165 1r5k/p1p3pp/8/8/4p3/P1P1R3/1P1Q1qr1/2KR4 w - - Best e3e2 e3e2 True 96.4
166 r3r1k1/5pp1/p1p4p/2Pp4/8/q1NQP1BP/5PP1/4K2R b K - Best d5d4 d5d4 True 96.4
167 7Q/ppp2q2/3p2k1/P2Ppr1N/1PP5/7R/5rP1/6K1 b - - Best f2g2 f2g2 True 96.4
168 r3k2r/pb1q1p2/8/2p1pP2/4p1p1/B1P1Q1P1/P1P3K1/R4R2 b kq - Best d7d2 d7d2 True 96.4
169 5rk1/1pp3bp/3p2p1/2PPp3/1P2P3/2Q1B3/4q1PP/R5K1 b - - Best g7h6 g7h6 True 96.4
170 5r1k/6Rp/1p2p3/p2pBp2/1qnP4/4P3/Q4PPP/6K1 w - - Best a2c4 a2c4 True 96.5
171 2rq4/1b2b1kp/p3p1p1/1p1nNp2/7P/1B2B1Q1/PP3PP1/3R2K1 w - - Best e3h6 e3h6 True 96.5
172 5r1k/p5pp/8/1P1pq3/P1p2nR1/Q7/5BPP/6K1 b - - Best e5e1 e5e1 True 96.5
173 2r1b3/1pp1qrk1/p1n1P1p1/7R/2B1p3/4Q1P1/PP3PP1/3R2K1 w - - Best e3h6 e3h6 True 96.5
174 2r2rk1/6p1/p3pq1p/1p1b1p2/3P1n2/PP3N2/3N1PPP/1Q2RR1K b - - Best f4g2 f4g2 True 96.6
175 r5k1/pppb3p/2np1n2/8/3PqNpP/3Q2P1/PPP5/R4RK1 w - - Best f4h5 f4h5 True 96.6
176 r1bq3r/ppp2pk1/3p1pp1/8/2BbPQ2/2NP2P1/PPP4P/R4R1K b - - Best h8h2 h8h2 True 96.6
177 r1b3r1/4qk2/1nn1p1p1/3pPp1P/p4P2/1p3BQN/PKPBN3/3R3R b - - Best e7a3 e7a3 True 96.6
178 3r2k1/p1rn1p1p/1p2pp2/6q1/3PQNP1/5P2/P1P4R/R5K1 w - - Best f4e6 f4e6 True 96.6
179 r1b2r1k/pp4pp/3p4/3B4/8/1QN3Pn/PP3q1P/R3R2K b - - Best f2g1 f2g1 True 96.6
180 r1q2rk1/p3bppb/3p1n1p/2nPp3/1p2P1P1/6NP/PP2QPB1/R1BNK2R b KQ - Best f6d5 f6d5 True 96.7
181 r3k2r/2p2p2/p2p1n2/1p2p3/4P2p/1PPPPp1q/1P5P/R1N2QRK b kq - Best f6g4 f6g4 True 96.7
182 r1b2rk1/ppqn1p1p/2n1p1p1/2b3N1/2N5/PP1BP3/1B3PPP/R2QK2R w KQ - Best d1h5 d1h5 True 96.7
183 1r2k1r1/5p2/b3p3/1p2b1B1/3p3P/3B4/PP2KP2/2R3R1 w - - Best g5f6 g5f6 True 96.7
184 4kn2/r4p1r/p3bQ2/q1nNP1Np/1p5P/8/PPP3P1/2KR3R w - - Best f6e7 f6e7 True 96.7
185 1r1rb1k1/2p3pp/p2q1p2/3PpP1Q/Pp1bP2N/1B5R/1P4PP/2B4K w - - Best h5h7 h5h7 True 96.8
186 r5r1/p1q2p1k/1p1R2pB/3pP3/6bQ/2p5/P1P1NPPP/6K1 w - - Best h6f8 h6f8 True 96.8
187 6k1/5p2/p3p3/1p3qp1/2p1Qn2/2P1R3/PP1r1PPP/4R1K1 b - - Best f4h3 f4h3 True 96.8
188 3RNbk1/pp3p2/4rQpp/8/1qr5/7P/P4P2/3R2K1 w - - Best f6g7 f6g7 True 96.8
189 3r1k2/1ppPR1n1/p2p1rP1/3P3p/4Rp1N/5K2/P1P2P2/8 w - - Best e7e8 e7e8 True 96.8
190 8/p2b2kp/1q1p2p1/1P1Pp3/4P3/3B2P1/P2Q3P/2Nn3K b - - Best d7h3 d7h3 True 96.8
191 2r1Rn1k/1p1q2pp/p7/5p2/3P4/1B4P1/P1P1QP1P/6K1 w - - Best e2c4 e2c4 True 96.9
192 r3k3/ppp2Npp/4Bn2/2b5/1n1pp3/N4P2/PPP3qP/R2QKR2 b Qq - Best b4d3 b4d3 True 96.9
193 5bk1/p4ppp/Qp6/4B3/1P6/Pq2P1P1/2rr1P1P/R4RK1 b - - Best b3e3 b3e3 True 96.9
194 5rk1/ppq2ppp/2p5/4bN2/4P3/6Q1/PPP2PPP/3R2K1 w - - Best f5h6 f5h6 True 96.9
195 3r1rk1/1p3p2/p3pnnp/2p3p1/2P2q2/1P5P/PB2QPPN/3RR1K1 w - - Best g2g3 g2g3 True 96.9
196 rr4k1/p1pq2pp/Q1n1pn2/2bpp3/4P3/2PP1NN1/PP3PPP/R1B1K2R b KQ - Best c6b4 b8b6 False 96.4
197 7k/1p4p1/7p/3P1n2/4Q3/2P2P2/PP3qRP/7K b - - Best f2f1 f2f1 True 96.4
198 2br2k1/ppp2p1p/4p1p1/4P2q/2P1Bn2/2Q5/PP3P1P/4R1RK b - - Best d8d3 d8d3 True 96.5
199 r1br2k1/pp2nppp/2n5/1B1q4/Q7/4BN2/PP3PPP/2R2RK1 w - - Best b5c6 f1d1 f1d1 True 96.5
200 2rqrn1k/pb4pp/1p2pp2/n2P4/2P3N1/P2B2Q1/1B3PPP/2R1R1K1 w - - Best b2f6 b2f6 True 96.5
201 2b2r1k/4q2p/3p2pQ/2pBp3/8/6P1/1PP2P1P/R5K1 w - - Best a1a7 a1a7 True 96.5
202 QR2rq1k/2p3p1/3p1pPp/8/4P3/8/P1r3PP/1R4K1 b - - Best c2a2 c2a2 True 96.5
203 r4rk1/5ppp/p3q1n1/2p2NQ1/4n3/P3P3/1B3PPP/1R3RK1 w - - Best g5h6 g5h6 True 96.6
204 r1b1qrk1/1p3ppp/p1p5/3Nb3/5N2/P7/1P4PQ/K1R1R3 w - - Best e1e5 e1e5 True 96.6
205 r3rnk1/1pq2bb1/p4p2/3p1Pp1/3B2P1/1NP4R/P1PQB3/2K4R w - - Best d2g5 d2g5 True 96.6
206 1Qq5/2P1p1kp/3r1pp1/8/8/7P/p4PP1/2R3K1 b - - Best d6c6 d6c6 True 96.6
207 r1bq2kr/p1pp1ppp/1pn1p3/4P3/2Pb2Q1/BR6/P4PPP/3K1BNR w - - Best g4g7 g4g7 True 96.6
208 3r1bk1/ppq3pp/2p5/2P2Q1B/8/1P4P1/P6P/5RK1 w - - Best h5f7 h5f7 True 96.6
209 4kb1r/2q2p2/r2p4/pppBn1B1/P6P/6Q1/1PP5/2KRR3 w k - Best e1e5 e1e5 True 96.7
210 3r1rk1/pp1q1ppp/3pn3/2pN4/5PP1/P5PQ/1PP1B3/1K1R4 w - - Best d1h1 d1h1 True 96.7
211 r1bqrk2/pp1n1n1p/3p1p2/P1pP1P1Q/2PpP1NP/6R1/2PB4/4RBK1 w - - Best h5f7 h5f7 True 96.7
212 rn1qr2Q/pbppk1p1/1p2pb2/4N3/3P4/2N5/PPP3PP/R4RK1 w - - Best h8g7 h8g7 True 96.7
213 3r1r1k/1b4pp/ppn1p3/4Pp1R/Pn5P/3P4/4QP2/1qB1NKR1 w - - Best h5h7 e2e3 False 96.2
214 r2r2k1/1p2qpp1/1np1p1p1/p3N3/2PPN3/bP5R/4QPPP/4R1K1 w - - Best e4g5 e4g5 True 96.3
215 3r2k1/pb1q1pp1/1p2pb1p/8/3N4/P2QB3/1P3PPP/1Br1R1K1 w - - Best d3h7 d3h7 True 96.3
216 r2qr1k1/1b1nbppp/p3pn2/1p1pN3/3P1B2/2PB1N2/PP2QPPP/R4RK1 w - - Best e5f7 e5f7 True 96.3
217 r3kb1r/1pp3p1/p3bp1p/5q2/3QN3/1P6/PBP3P1/3RR1K1 w kq - Best d4d7 d4d7 True 96.3
218 6k1/pp5p/2p3q1/6BP/2nPr1Q1/8/PP3R1K/8 w - - Best g5h6 g5h6 True 96.3
219 7k/p4q1p/1pb5/2p5/4B2Q/2P1B3/P6P/7K b - - Best f7f1 f7f1 True 96.3
220 3rr1k1/ppp2ppp/8/5Q2/4n3/1B5R/PPP1qPP1/5RK1 b - - Best e2f1 e2f1 True 96.4
221 r3k3/P5bp/2N1bp2/4p3/2p5/6NP/1PP2PP1/3R2K1 w q - Best d1d8 d1d8 True 96.4
222 2r1r2k/1q3ppp/p2Rp3/2p1P3/6QB/p3P3/bP3PPP/3R2K1 w - - Best h4f6 b2a3 False 95.9
223 r1bqk2r/pp3ppp/5n2/8/1b1npB2/2N5/PP1Q2PP/1K2RBNR w kq - Best c3e4 c3e4 True 96.0
224 5rk1/p1q3pp/1p1r4/2p1pp1Q/1PPn1P2/3B3P/P2R2P1/3R2K1 b - - Best d6h6 e5e4 e5e4 True 96.0
225 4R3/4q1kp/6p1/1Q3b2/1P1b1P2/6KP/8/8 b - - Best e7h4 e7h4 True 96.0
226 2b2rk1/p1p4p/2p1p1p1/br2N1Q1/1p2q3/8/PB3PPP/3R1RK1 w - - Best e5f7 e5f7 True 96.0
227 2k1rb1r/ppp3pp/2np1q2/5b2/2B2P2/2P1BQ2/PP1N1P1P/2KR3R b - - Best d6d5 d6d5 True 96.0
228 r4rk1/1bq1bp1p/4p1p1/p2p4/3BnP2/1N1B3R/PPP3PP/R2Q2K1 w - - Best d3e4 d3e4 True 96.1
229 8/8/8/1p5r/p1p1k1pN/P2pBpP1/1P1K1P2/8 b - - Best h5h4 b5b4 h5h8 False 95.6
230 2b5/1r6/2kBp1p1/p2pP1P1/2pP4/1pP3K1/1R3P2/8 b - - Best b7b4 a5a4 False 95.2
231 r4rk1/1b1nqp1p/p5p1/1p2PQ2/2p5/5N2/PP3PPP/R1BR2K1 w - - Best c1g5 c1g5 True 95.2
232 1R2rq1k/2p3p1/Q2p1pPp/8/4P3/8/P1r3PP/1R4K1 w - - Best a6b5 b8e8 b8e8 True 95.3
233 5rk1/p1p2r1p/2pp2p1/4p3/PPPnP3/3Pq1P1/1Q1R1R1P/4NK2 b - - Best d4b3 d4b3 True 95.3
234 2kr1r2/p6p/5Pp1/2p5/1qp2Q1P/7R/PP6/1KR5 w - - Best h3b3 h3b3 True 95.3
235 5r2/1p1RRrk1/4Qq1p/1PP3p1/8/4B3/1b3P1P/6K1 w - - Best e6f7 e7f7 e6e4 False 94.9
236 1R6/p5pk/4p2p/4P3/8/2r3qP/P3R1b1/4Q1K1 b - - Best c3c1 c3c1 True 94.9
237 r5k1/pQp2qpp/8/4pbN1/3P4/6P1/PPr4P/1K1R3R b - - Best c2c1 c2c1 True 94.9
238 1k1r4/pp1r1pp1/4n1p1/2R5/2Pp1qP1/3P2QP/P4PB1/1R4K1 w - - Best g2b7 g2b7 True 95.0
239 8/6k1/5pp1/Q6p/5P2/6PK/P4q1P/8 b - - Best f2f1 f2f1 True 95.0
240 2b4k/p1b2p2/2p2q2/3p1PNp/3P2R1/3B4/P1Q2PKP/4r3 w - - Best c2c6 c2c6 True 95.0
241 2rq1rk1/pp3ppp/2n2b2/4NR2/3P4/PB5Q/1P4PP/3R2K1 w - - Best h3h7 f5f6 False 94.6
242 r1b1r1k1/pp1nqp2/2p1p1pp/8/4N3/P1Q1P3/1P3PPP/1BRR2K1 w - - Best d1d7 d1d7 True 94.6
243 1r3r1k/3p4/1p1Nn1R1/4Pp1q/pP3P1p/P7/5Q1P/6RK w - - Best f2e2 g6f6 False 94.2
244 r6r/pp3ppp/3k1b2/2pb4/B4Pq1/2P1Q3/P5PP/1RBR2K1 w - - Best e3c5 e3c5 True 94.3
245 4rrn1/ppq3bk/3pPnpp/2p5/2PB4/2NQ1RPB/PP5P/5R1K w - - Best d3g6 d3g6 True 94.3
246 6R1/4qp1p/ppr1n1pk/8/1P2P1QP/6N1/P4PP1/6K1 w - - Best g4h5 g4h5 True 94.3
247 2k1r3/1p2Bq2/p2Qp3/Pb1p1p1P/2pP1P2/2P5/2P2KP1/1R6 w - - Best b1b5 b1b5 True 94.3
248 5r1k/1p4pp/3q4/3Pp1R1/8/8/PP4PP/4Q1K1 b - - Best d6c5 d6c5 True 94.4
249 r4rk1/pbq2pp1/1ppbpn1p/8/2PP4/1P1Q1N2/PBB2PPP/R3R1K1 w - - Best c4c5 d4d5 d4d5 True 94.4
250 1b5k/7P/p1p2np1/2P2p2/PP3P2/4RQ1R/q2r3P/6K1 w - - Best e3e8 e3e1 False 94.0
251 k7/p4p2/P1q1b1p1/3p3p/3Q4/7P/5PP1/1R4K1 w - - Best d4e5 d4f4 d4f4 True 94.0
252 1rb1r1k1/p1p2ppp/5n2/2pP4/5P2/2QB4/qNP3PP/2KRB2R b - - Best e8e2 e8e2 True 94.0
253 k5r1/p4b2/2P5/5p2/3P1P2/4QBrq/P5P1/4R1K1 w - - Best e3e8 e3e8 True 94.1
254 r6k/pp3p1p/2p1bp1q/b3p3/4Pnr1/2PP2NP/PP1Q1PPN/R2B2RK b - - Best f4h3 f4h3 True 94.1
255 3r3r/p4pk1/5Rp1/3q4/1p1P2RQ/5N2/P1P4P/2b4K w - - Best f6g6 f6g6 True 94.1
256 3r1rk1/1pb1qp1p/2p3p1/p7/P2Np2R/1P5P/1BP2PP1/3Q1BK1 w - - Best d4f5 d4f5 True 94.1
257 4r1k1/pq3p1p/2p1r1p1/2Q1p3/3nN1P1/1P6/P1P2P1P/3RR1K1 w - - Best d1d4 d1d4 True 94.2
258 r3brkn/1p5p/2p2Ppq/2Pp3B/3Pp2Q/4P1R1/6PP/5R1K w - - Best h5g6 h5g6 True 94.2
259 r1bq1rk1/ppp2ppp/2np4/2bN1PN1/2B1P3/3p4/PPP2nPP/R1BQ1K1R w - - Best d1h5 d1h5 True 94.2
260 2r2b1r/p1Nk2pp/3p1p2/N2Qn3/4P3/q6P/P4PP1/1R3K1R w - - Best d5e6 d5e6 True 94.2
261 r5k1/1bp3pp/p2p4/1p6/5p2/1PBP1nqP/1PP3Q1/R4R1K b - - Best f3d4 f3d4 True 94.3
262 6k1/p1B1b2p/2b3r1/2p5/4p3/1PP1N1Pq/P2R1P2/3Q2K1 b - - Best g6h6 g6h6 True 94.3
263 rnbqr2k/pppp1Qpp/8/b2NN3/2B1n3/8/PPPP1PPP/R1B1K2R w KQ - Best f7g8 f7g8 True 94.3
264 r2r2k1/1R2qp2/p5pp/2P5/b1PN1b2/P7/1Q3PPP/1B1R2K1 b - - Best a8b8 a8b8 True 94.3
265 2r1k2r/2pn1pp1/1p3n1p/p3PP2/4q2B/P1P5/2Q1N1PP/R4RK1 w k - Best e5f6 e5f6 True 94.3
266 r3q2r/2p1k1p1/p5p1/1p2Nb2/1P2nB2/P7/2PNQbPP/R2R3K b - - Best h8h2 h8h2 True 94.4
267 2r1kb1r/pp3ppp/2n1b3/1q1N2B1/1P2Q3/8/P4PPP/3RK1NR w Kk - Best d5c7 d5c7 True 94.4
268 2r3kr/ppp2n1p/7B/5q1N/1bp5/2Pp4/PP2RPPP/R2Q2K1 w - - Best e2e8 e2e8 True 94.4
269 2kr2nr/pp1n1ppp/2p1p3/q7/1b1P1B2/P1N2Q1P/1PP1BPP1/R3K2R w KQ - Best a3b4 a3b4 True 94.4
270 2r1r1k1/pp1q1ppp/3p1b2/3P4/3Q4/5N2/PP2RPPP/4R1K1 w - - Best d4g4 d4g4 True 94.4
271 2kr4/ppp3Pp/4RP1B/2r5/5P2/1P6/P2p4/3K4 w - - Best e6d6 e6d6 True 94.5
272 nrq4r/2k1p3/1p1pPnp1/pRpP1p2/P1P2P2/2P1BB2/1R2Q1P1/6K1 w - - Best e3c5 e3c5 True 94.5
273 2k4B/bpp1qp2/p1b5/7p/1PN1n1p1/2Pr4/P5PP/R3QR1K b - - Best e4g3 e4g3 True 94.5
274 8/1p6/p5R1/k7/Prpp4/K7/1NP5/8 w - - Best g6b6 g6b6 True 94.5
275 r1b2rk1/1p1n1ppp/p1p2q2/4p3/P1B1Pn2/1QN2N2/1P3PPP/3R1RK1 b - - Best f4g2 b7b5 b7b5 True 94.5
276 r5k1/pp1RR1pp/1b6/6r1/2p5/B6P/P4qPK/3Q4 w - - Best d1d5 d1d5 True 94.6
277 1r4r1/p2kb2p/bq2p3/3p1p2/5P2/2BB3Q/PP4PP/3RKR2 b - - Best g8g3 g8g2 g8g2 True 94.6
278 r2qkb1r/pppb2pp/2np1n2/5pN1/2BQP3/2N5/PPP2PPP/R1B1K2R w KQkq - Best c4f7 c4f7 True 94.6
279 r7/4b3/2p1r1k1/1p1pPp1q/1P1P1P1p/PR2NRpP/2Q3K1/8 w - - Best e3f5 e3f5 True 94.6
280 r1r2bk1/5p1p/pn4p1/N2b4/3Pp3/B3P3/2q1BPPP/RQ3RK1 b - - Best f8a3 f8a3 True 94.6
281 2R5/2R4p/5p1k/6n1/8/1P2QPPq/r7/6K1 w - - Best c7h7 c7h7 True 94.7
282 6k1/2p3p1/1p1p1nN1/1B1P4/4PK2/8/2r3b1/7R w - - Best h1h8 h1h8 True 94.7
283 3q1rk1/4bp1p/1n2P2Q/3p1p2/6r1/Pp2R2N/1B4PP/7K w - - Best h3g5 h3g5 True 94.7
284 3r3k/pp4pp/8/1P6/3N4/Pn2P1qb/1B1Q2B1/2R3K1 w - - Best d4f5 d4f5 True 94.7
285 2rr3k/1b2bppP/p2p1n2/R7/3P4/1qB2P2/1P4Q1/1K5R w - - Best g2g7 g2g7 True 94.7
286 3r1k2/1p6/p4P2/2pP2Qb/8/1P1KB3/P6r/8 b - - Best d8d5 d8d5 True 94.8
287 rn3k1r/pp2bBpp/2p2n2/q5N1/3P4/1P6/P1P3PP/R1BQ1RK1 w - - Best d1h5 d1h5 True 94.8
288 r1b2rk1/p4ppp/1p1Qp3/4P2N/1P6/8/P3qPPP/3R1RK1 w - - Best h5f6 h5f6 True 94.8
289 2r3k1/5p1p/p3q1p1/2n3P1/1p1QP2P/1P4N1/PK6/2R5 b - - Best e6e5 e6e5 True 94.8
290 2k2r2/2p5/1pq5/p1p1n3/P1P2n1B/1R4Pp/2QR4/6K1 b - - Best f4e2 f4e2 True 94.8
291 5r1k/3b2p1/p6p/1pRpR3/1P1P2q1/P4pP1/5QnP/1B4K1 w - - Best h2h3 h2h3 True 94.8
292 4r3/1Q1qk2p/p4pp1/3Pb3/P7/6PP/5P2/4R1K1 w - - Best d5d6 d5d6 True 94.9
293 1nbq1r1k/3rbp1p/p1p1pp1Q/1p6/P1pPN3/5NP1/1P2PPBP/R4RK1 w - - Best f3g5 g2h3 False 94.5
294 3r3k/1r3p1p/p1pB1p2/8/p1qNP1Q1/P6P/1P4P1/3R3K w - - Best d6f8 d4f5 g4f4 g4f4 True 94.6
295 4r3/p4r1p/R1p2pp1/1p1bk3/4pNPP/2P1K3/2P2P2/3R4 w - - Best d1d5 d1d5 True 94.6
296 3r4/1p2k2p/p1b1p1p1/4Q1Pn/2B3KP/4pP2/PP2R1N1/6q1 b - - Best d8d4 d8f8 d8f8 True 94.6
297 3r1rk1/p3qp1p/2bb2p1/2p5/3P4/1P6/PBQN1PPP/2R2RK1 b - - Best c6g2 d6h2 c6g2 True 94.6
298 3Q4/p3b1k1/2p2rPp/2q5/4B3/P2P4/7P/6RK w - - Best d8h8 d8h8 True 94.6
299 1n2rr2/1pk3pp/pNn2p2/2N1p3/8/6P1/PP2PPKP/2RR4 w - - Best c5a4 c5a4 True 94.6
300 b2b1r1k/3R1ppp/4qP2/4p1PQ/4P3/5B2/4N1K1/8 w - - Best g5g6 g5g6 True 94.7
Solved 284 of 300 positions in 909 seconds.
Counted 2,080,480,006 nodes (2,289,808 nodes per second).
Null Move Cutoffs = 86.23% Beta Cutoff Move Number = 1.41 Beta Cutoff First Move = 89.17%
Also, I implemented a custom "testpositions" command. This is perft though, not search. See https://www.madchess.net/2018/10/28/madchess-3-0-beta-build-39-bitboards/. Scroll down until you see the blue background of a command window.
My C# chess engine: https://www.madchess.net