jhellis3 wrote:Here is the fix applied to vanilla SF if anyone is interested:
https://github.com/jhellis3/Stockfish/tree/tb_fix_1
[D]8/2P1P3/3k4/8/8/4K3/P2p1p2/8 b - -
512MB Hash, Single Thread:
Vanilla (with TBs) @ ~200 seconds: Depth 51, score +123.xx, short line displayed
Patch @ ~200 seconds: Depth 49, score Mate in 14, full line displayed (starts returning mate scores at d31)
Vanilla (sans TBs) @ ~80 seconds: Depth 40, score Mate in 14, full line displayed (starts returning mate scores at d35)
Natural TB finds the mate in 14 in at depth 46 (same conditions as yours 512MB hash, single core). Starts returning mate scores at d30
Code: Select all
1...f2-f1Q 2.c7-c8Q Qf1-e1+ 3.Ke3-f4 Qe1xe7
-+ (-2.06) Depth: 2/2 00:00:00
1...d2-d1Q 2.c7-c8N+ Kd6-d7 3.e7-e8B+ Kd7xe8
-+ (-6.46) Depth: 3/5 00:00:00
1...d2-d1Q 2.c7-c8N+ Kd6-d7 3.e7-e8B+ Kd7xe8
-+ (-6.46) Depth: 4/6 00:00:00
1...d2-d1Q 2.c7-c8N+ Kd6-d7 3.e7-e8B+ Kd7xe8
-+ (-6.46) Depth: 4/6 00:00:00
1...d2-d1Q 2.e7-e8N+ Kd6-e7 3.Ke3xf2 Qd1-c2+ 4.Kf2-e3 Ke7xe8
-+ (-7.87) Depth: 5/7 00:00:00
1...d2-d1Q 2.e7-e8N+ Kd6-e7 3.Ke3xf2 Qd1-c2+ 4.Kf2-e3 Ke7xe8 5.c7-c8N Qc2xc8
-+ (-9.45) Depth: 6/8 00:00:00 10kN, tb=394
1...d2-d1Q 2.e7-e8N+ Kd6-e7 3.Ke3xf2 Qd1-c2+ 4.Kf2-e3 Ke7xe8 5.c7-c8N Qc2xc8
-+ (-9.45) Depth: 7/10 00:00:00 15kN, tb=647
1...d2-d1Q 2.e7-e8N+ Kd6-d7 3.c7-c8Q+ Kd7xc8 4.Ke3xf2 Qd1-d4+ 5.Kf2-f3 Qd4-d5+ 6.Kf3-e2 Qd5-c4+ 7.Ke2-e3
-+ (-9.37) Depth: 8/12 00:00:00 37kN, tb=2583
1...d2-d1Q 2.c7-c8N+ Kd6-d7 3.e7-e8B+ Kd7xe8 4.Ke3xf2 Qd1-d2+ 5.Kf2-g3 Qd2-c3+ 6.Kg3-h2 Qc3-c2+ 7.Kh2-h1 Qc2-c1+ 8.Kh1-h2
-+ (-11.00) Depth: 9/18 00:00:00 117kN, tb=14075
1...d2-d1Q 2.c7-c8N+ Kd6-d7 3.Nc8-b6+ Kd7xe7 4.Nb6-c8+ Ke7-e8 5.Ke3-f4 Qd1-c1+ 6.Kf4-e5 Qc1-c3+ 7.Ke5-e4 Qc3-c2+ 8.Ke4-d4 Qc2xc8 9.a2-a4
-+ (-38.06) Depth: 10/22 00:00:00 314kN, tb=26724
1...d2-d1Q 2.e7-e8N+ Kd6-d7 3.c7-c8R Kd7xc8 4.Ke3xf2 Qd1-d2+ 5.Kf2-f3 Qd2-d5+ 6.Kf3-f4 Qd5-f7+ 7.Kf4-e3 Qf7-e7+ 8.Ke3-f2 Qe7-a7+ 9.Kf2-e1 Qa7-a5+ 10.Ke1-d1 Qa5-a4+ 11.Kd1-c1 Qa4-f4+ 12.Kc1-b1 Qf4-b4+ 13.Kb1-c1 Qb4-c3+ 14.Kc1-b1
-+ (-38.72) Depth: 11/30 00:00:00 890kN, tb=78695
1...d2-d1Q 2.e7-e8N+ Kd6-d7 3.Ke3xf2 Qd1-c2+ 4.Kf2-e3 Qc2-c3+ 5.Ke3-e2 Kd7xe8 6.a2-a4 Qc3-c2+ 7.Ke2-e3 Qc2-c5+ 8.Ke3-e2 Qc5-e5+ 9.Ke2-f2 Qe5-f4+ 10.Kf2-g2 Qf4-g4+ 11.Kg2-h2 Qg4-e2+ 12.Kh2-h3 Qe2-e6+ 13.Kh3-h2 Qe6-h6+ 14.Kh2-g1 Qh6-c1+ 15.Kg1-g2
-+ (-38.66) Depth: 12/30 00:00:00 1215kN, tb=105074
1...d2-d1Q 2.e7-e8N+ Kd6-d7 3.Ke3xf2 Qd1-c2+ 4.Kf2-e3 Qc2-c3+ 5.Ke3-e2 Kd7xe8 6.c7-c8R+ Qc3xc8 7.Ke2-d2 Qc8-d8+ 8.Kd2-e2 Qd8-e7+ 9.Ke2-d2 Qe7-g5+ 10.Kd2-c2 Qg5-c5+ 11.Kc2-b2 Qc5-b4+ 12.Kb2-c2 Ke8-d7
-+ (-38.73) Depth: 13/32 00:00:00 1333kN, tb=115983
1...d2-d1Q 2.e7-e8N+ Kd6-d7 3.c7-c8B+ Kd7xc8 4.Ke3xf2 Qd1-h5 5.Ne8-f6 Qh5-h2+ 6.Kf2-e3 Qh2-h6+ 7.Ke3-d3 Qh6xf6 8.Kd3-c2 Qf6-g6+ 9.Kc2-c3 Qg6-g7+ 10.Kc3-b3 Qg7-f7+ 11.Kb3-a3 Qf7-f3+ 12.Ka3-a4 Qf3-a8+ 13.Ka4-b3 Qa8-d5+ 14.Kb3-a3 Qd5-d3+ 15.Ka3-b4
-+ (-38.75) Depth: 14/32 00:00:00 1420kN, tb=122756
1...d2-d1Q 2.e7-e8N+ Kd6-d7 3.c7-c8B+ Kd7xc8 4.Ke3xf2 Qd1-h5 5.Ne8-f6 Qh5-h2+ 6.Kf2-e3 Qh2-h6+ 7.Ke3-d3 Qh6xf6 8.Kd3-c2 Qf6-g6+ 9.Kc2-c3 Qg6-g7+ 10.Kc3-b3 Qg7-f7+ 11.Kb3-a3 Qf7-f3+ 12.Ka3-a4 Qf3-d1+ 13.Ka4-a3 Qd1-c1+ 14.Ka3-a4 Qc1-c4+ 15.Ka4-a3
-+ (-38.75) Depth: 15/32 00:00:00 1474kN, tb=124184
1...d2-d1Q 2.c7-c8N+ Kd6-d7 3.Ke3xf2 Qd1-c2+ 4.Kf2-e3 Qc2xc8 5.e7-e8R Qc8xe8+ 6.Ke3-d4 Qe8-h8+ 7.Kd4-d3 Qh8-g8 8.Kd3-d4 Qg8xa2 9.Kd4-e3 Qa2-d5 10.Ke3-e2 Kd7-d6 11.Ke2-e3
-+ (-48.95) Depth: 16/34 00:00:00 1939kN, tb=145982
1...d2-d1Q 2.c7-c8N+ Kd6-d7 3.Ke3xf2 Qd1-c2+ 4.Kf2-e3 Qc2xc8 5.e7-e8R Qc8xe8+ 6.Ke3-d4 Qe8-h8+ 7.Kd4-d3 Qh8-g8 8.Kd3-d4 Qg8xa2 9.Kd4-e3 Qa2-d5 10.Ke3-e2 Kd7-d6 11.Ke2-e3 Qd5-e6+ 12.Ke3-d3
-+ (-48.95) Depth: 17/34 00:00:01 2122kN, tb=146850
1...d2-d1Q 2.e7-e8N+ Kd6-d7 3.c7-c8B+ Kd7xc8 4.Ke3xf2 Qd1-d8 5.Kf2-f3 Qd8xe8 6.a2-a3 Qe8-f8+ 7.Kf3-e2 Qf8-e7+ 8.Ke2-f3 Qe7xa3+ 9.Kf3-e2 Kc8-d7 10.Ke2-d2 Qa3-a2+ 11.Kd2-e3 Kd7-d6 12.Ke3-d3 Qa2-f2
-+ (-49.03) Depth: 18/34 00:00:01 2526kN, tb=147843
1...d2-d1Q 2.e7-e8N+ Kd6-d7 3.c7-c8B+ Kd7xc8 4.Ke3xf2 Qd1-d8 5.Kf2-f3 Qd8xe8 6.a2-a3 Qe8-f8+ 7.Kf3-e2 Qf8-e7+ 8.Ke2-f3 Qe7xa3+ 9.Kf3-e2 Kc8-d7 10.Ke2-d2 Qa3-a2+ 11.Kd2-e3 Kd7-d6 12.Ke3-d3 Qa2-f2 13.Kd3-c3
-+ (-49.03) Depth: 19/34 00:00:01 2895kN, tb=150352
1...d2-d1Q 2.e7-e8N+ Kd6-d7 3.c7-c8B+ Kd7xc8 4.Ke3xf2 Qd1-d8 5.Kf2-f3 Qd8xe8 6.a2-a3 Qe8-f8+ 7.Kf3-e2 Qf8-e7+ 8.Ke2-f3 Qe7xa3+ 9.Kf3-e2 Kc8-d7 10.Ke2-d2 Qa3-a2+ 11.Kd2-e3 Kd7-d6 12.Ke3-d3 Qa2-f2 13.Kd3-e4 Qf2-e2+ 14.Ke4-d4 Qe2-d2+ 15.Kd4-e4 Qd2-c3
-+ (-49.03) Depth: 20/34 00:00:01 3464kN, tb=153053
1...d2-d1Q 2.e7-e8N+ Kd6-d7 3.c7-c8B+ Kd7xc8 4.Ke3xf2 Qd1-d8 5.Kf2-f3 Qd8xe8 6.a2-a3 Qe8-f8+ 7.Kf3-e2 Qf8-e7+ 8.Ke2-f3 Qe7xa3+ 9.Kf3-e2 Kc8-d7 10.Ke2-d2 Qa3-a2+ 11.Kd2-e3 Kd7-d6 12.Ke3-d3 Qa2-f2 13.Kd3-e4 Qf2-e2+ 14.Ke4-d4 Qe2-d2+ 15.Kd4-e4
-+ (-49.03) Depth: 21/34 00:00:01 4156kN, tb=157176
1...d2-d1Q 2.e7-e8N+ Kd6-d7 3.c7-c8B+ Kd7xc8 4.Ke3xf2 Qd1-d8 5.Kf2-f3 Qd8xe8 6.a2-a3 Qe8-f8+ 7.Kf3-e2 Qf8-e7+ 8.Ke2-f3 Qe7xa3+ 9.Kf3-e2 Kc8-d7 10.Ke2-d2 Qa3-a2+ 11.Kd2-e3 Kd7-d6 12.Ke3-d3 Qa2-f2 13.Kd3-e4 Qf2-e2+ 14.Ke4-d4 Qe2-d2+ 15.Kd4-e4 Qd2-e1+ 16.Ke4-d3 Qe1-d1+ 17.Kd3-c3
-+ (-49.03) Depth: 22/34 00:00:02 5170kN, tb=163209
1...d2-d1Q
-+ (-49.10) Depth: 23/34 00:00:03 7126kN, tb=165656
1...d2-d1Q 2.e7-e8N+ Kd6-d7 3.c7-c8B+ Kd7xc8 4.Ke3xf2 Qd1-d8 5.Kf2-f3 Qd8xe8 6.a2-a3 Qe8-f8+ 7.Kf3-e2 Qf8-e7+ 8.Ke2-f3 Qe7xa3+ 9.Kf3-e2 Kc8-d7 10.Ke2-d2 Kd7-d6 11.Kd2-e2 Qa3-a5 12.Ke2-d1 Qa5-a4+ 13.Kd1-c1 Qa4-c4+ 14.Kc1-d2 Qc4-b4+ 15.Kd2-e3 Kd6-d5 16.Ke3-f2
-+ (-49.11) Depth: 23/34 00:00:03 7842kN, tb=169727
1...d2-d1Q 2.e7-e8N+ Kd6-d7 3.c7-c8B+ Kd7xc8 4.Ke3xf2 Qd1-d8 5.Kf2-f3 Qd8xe8 6.a2-a3 Qe8-f8+ 7.Kf3-e2 Qf8-e7+ 8.Ke2-f3 Qe7xa3+ 9.Kf3-e2 Kc8-d7 10.Ke2-d2 Kd7-d6 11.Kd2-e2 Qa3-a5 12.Ke2-d1 Qa5-a4+ 13.Kd1-d2 Qa4-b4+ 14.Kd2-e3 Kd6-d5 15.Ke3-f2 Qb4-f8+ 16.Kf2-e3 Qf8-a3+ 17.Ke3-e2
-+ (-49.11) Depth: 24/34 00:00:04 9769kN, tb=178700
1...d2-d1Q 2.e7-e8N+ Kd6-d7 3.c7-c8B+ Kd7xc8 4.Ke3xf2 Qd1-d8 5.Kf2-f3 Qd8xe8 6.a2-a3 Qe8-f8+ 7.Kf3-e2 Qf8-e7+ 8.Ke2-f3 Qe7xa3+ 9.Kf3-e2 Kc8-d7 10.Ke2-d2 Kd7-d6 11.Kd2-e2 Qa3-a5 12.Ke2-e3 Qa5-a2 13.Ke3-d3 Qa2-b2 14.Kd3-e3 Qb2-b3+ 15.Ke3-e4 Qb3-b4+ 16.Ke4-e3 Kd6-d5
-+ (-49.11) Depth: 25/34 00:00:05 12371kN, tb=192467
1...d2-d1Q
-+ (-49.18) Depth: 26/34 00:00:06 15801kN, tb=196207
1...d2-d1Q
-+ (-49.25) Depth: 26/34 00:00:07 17457kN, tb=198581
1...d2-d1Q
-+ (-49.35) Depth: 26/34 00:00:07 18165kN, tb=200848
1...d2-d1Q
-+ (-49.50) Depth: 26/34 00:00:07 18824kN, tb=201493
1...d2-d1Q
-+ (-49.70) Depth: 26/34 00:00:07 19204kN, tb=201721
1...d2-d1Q
-+ (-49.97) Depth: 26/34 00:00:07 19821kN, tb=202620
1...d2-d1Q
-+ (-50.33) Depth: 26/34 00:00:08 19998kN, tb=202755
1...d2-d1Q
-+ (-50.79) Depth: 26/34 00:00:08 20408kN, tb=203372
1...d2-d1Q
-+ (-51.39) Depth: 26/34 00:00:08 20551kN, tb=203413
1...d2-d1Q
-+ (-52.16) Depth: 26/34 00:00:08 20910kN, tb=204001
1...d2-d1Q
-+ (-53.14) Depth: 26/36 00:00:08 21599kN, tb=206535
1...d2-d1Q
-+ (-54.38) Depth: 26/36 00:00:09 22260kN, tb=207538
1...d2-d1Q
-+ (-55.95) Depth: 26/36 00:00:09 22828kN, tb=208763
1...d2-d1Q
-+ (-57.93) Depth: 26/36 00:00:09 23398kN, tb=209027
1...d2-d1Q 2.e7-e8N+
-+ (-54.75) Depth: 26/36 00:00:09 24096kN, tb=226630
1...d2-d1Q
-+ (-58.36) Depth: 26/36 00:00:09 24213kN, tb=226651
1...d2-d1Q
-+ (-62.29) Depth: 26/36 00:00:10 24390kN, tb=226665
1...d2-d1Q
-+ (-67.22) Depth: 26/36 00:00:10 24553kN, tb=226754
1...d2-d1Q
-+ (-73.41) Depth: 26/36 00:00:10 24738kN, tb=227363
1...d2-d1Q
-+ (-81.16) Depth: 26/36 00:00:10 24806kN, tb=227365
1...d2-d1Q
-+ (-90.87) Depth: 26/36 00:00:10 24859kN, tb=227365
1...d2-d1Q
-+ (-103.03) Depth: 26/36 00:00:10 24913kN, tb=227377
1...d2-d1Q
-+ (-118.24) Depth: 26/36 00:00:10 24963kN, tb=227377
1...d2-d1Q 2.e7-e8N+
-+ (-69.52) Depth: 26/36 00:00:10 25226kN, tb=229197
1...d2-d1Q
-+ (-114.80) Depth: 26/36 00:00:10 25253kN, tb=229231
1...d2-d1Q 2.e7-e8N+
-+ (-69.52) Depth: 26/36 00:00:10 25541kN, tb=229497
1...d2-d1Q
-+ (-102.14) Depth: 26/36 00:00:10 25546kN, tb=229498
1...d2-d1Q 2.e7-e8N+ Kd6-d7 3.c7-c8Q+ Kd7xc8 4.Ke3xf2 Qd1-d8 5.Ne8-g7 Qd8-f8+ 6.Kf2-e2 Qf8xg7 7.a2-a4 Qg7-b2+ 8.Ke2-f1 Qb2-d2 9.a4-a5 Qd2xa5 10.Kf1-e2 Kc8-d7 11.Ke2-e3 Qa5-a3+ 12.Ke3-f2 Kd7-e7 13.Kf2-g2 Qa3-a2+ 14.Kg2-f3 Qa2-a4 15.Kf3-g3 Ke7-d7 16.Kg3-f3 Qa4-a2 17.Kf3-g4
-+ (-80.26) Depth: 26/36 00:00:10 25559kN, tb=229569
1...d2-d1Q
-+ (-80.33) Depth: 27/36 00:00:10 26117kN, tb=234080
1...d2-d1Q
-+ (-80.40) Depth: 27/36 00:00:10 26337kN, tb=234159
1...d2-d1Q
-+ (-80.50) Depth: 27/36 00:00:10 26359kN, tb=234189
1...d2-d1Q
-+ (-80.85) Depth: 27/36 00:00:10 26402kN, tb=234191
1...d2-d1Q
-+ (-80.85) Depth: 27/36 00:00:10 26402kN, tb=234191
1...d2-d1Q
-+ (-81.12) Depth: 27/36 00:00:10 26440kN, tb=234191
1...d2-d1Q
-+ (-81.48) Depth: 27/38 00:00:10 26481kN, tb=234191
1...d2-d1Q
-+ (-81.94) Depth: 27/38 00:00:11 26509kN, tb=234191
1...d2-d1Q
-+ (-82.55) Depth: 27/38 00:00:11 26535kN, tb=234191
1...d2-d1Q
-+ (-83.31) Depth: 27/38 00:00:11 26557kN, tb=234192
1...d2-d1Q
-+ (-84.29) Depth: 27/38 00:00:11 26588kN, tb=234192
1...d2-d1Q
-+ (-85.53) Depth: 27/38 00:00:11 26615kN, tb=234192
1...d2-d1Q
-+ (-87.10) Depth: 27/38 00:00:11 26643kN, tb=234192
1...d2-d1Q
-+ (-89.08) Depth: 27/38 00:00:11 26668kN, tb=234192
1...d2-d1Q
-+ (-91.57) Depth: 27/38 00:00:11 26749kN, tb=234656
1...d2-d1Q
-+ (-94.70) Depth: 27/38 00:00:11 26779kN, tb=234656
1...d2-d1Q
-+ (-98.64) Depth: 27/38 00:00:11 26804kN, tb=234657
1...d2-d1Q
-+ (-103.57) Depth: 27/38 00:00:11 26836kN, tb=234657
1...d2-d1Q
-+ (-109.76) Depth: 27/38 00:00:11 27095kN, tb=235397
1...d2-d1Q
-+ (-117.51) Depth: 27/38 00:00:11 27379kN, tb=238310
1...d2-d1Q 2.e7-e8N+ Kd6-d7 3.c7-c8Q+ Kd7xc8 4.Ke3xf2 Qd1-d8 5.Ne8-g7 Qd8-f8+ 6.Kf2-e2 Qf8xg7 7.a2-a4 Qg7-b2+ 8.Ke2-e1 Qb2-a2 9.a4-a5 Qa2xa5+ 10.Ke1-e2 Qa5-a2+ 11.Ke2-d3 Kc8-d7 12.Kd3-e3 Kd7-e7 13.Ke3-f3 Ke7-d6 14.Kf3-e3 Qa2-a3+ 15.Ke3-f2 Qa3-d3 16.Kf2-g1 Qd3-b1+ 17.Kg1-f2
-+ (-115.57) Depth: 27/38 00:00:11 27768kN, tb=247868
1...d2-d1Q
-+ (-115.64) Depth: 28/38 00:00:12 29093kN, tb=252830
1...d2-d1Q
-+ (-115.71) Depth: 28/38 00:00:12 29120kN, tb=252834
1...d2-d1Q
-+ (-115.82) Depth: 28/38 00:00:12 29181kN, tb=252895
1...d2-d1Q
-+ (-115.96) Depth: 28/39 00:00:12 29197kN, tb=252895
1...d2-d1Q
-+ (-116.17) Depth: 28/39 00:00:12 29241kN, tb=253121
1...d2-d1Q
-+ (-116.44) Depth: 28/39 00:00:12 29472kN, tb=254681
1...d2-d1Q
-+ (-116.79) Depth: 28/39 00:00:12 29533kN, tb=254686
1...d2-d1Q
-+ (-117.26) Depth: 28/39 00:00:12 29798kN, tb=255251
1...d2-d1Q
-+ (-117.86) Depth: 28/39 00:00:12 29876kN, tb=255388
1...d2-d1Q
-+ (-118.63) Depth: 28/39 00:00:12 30197kN, tb=256060
1...d2-d1Q
-+ (-119.60) Depth: 28/39 00:00:12 30401kN, tb=256138
1...d2-d1Q
-+ (-120.84) Depth: 28/39 00:00:12 30704kN, tb=256430
1...d2-d1Q
-+ (-122.41) Depth: 28/39 00:00:13 31215kN, tb=256911
1...d2-d1Q 2.e7-e8N+ Kd6-d7 3.c7-c8Q+ Kd7xc8 4.Ke3xf2 Qd1-d8 5.Ne8-g7 Qd8-f8+ 6.Kf2-g3 Qf8xg7+ 7.Kg3-h4 Qg7-a1 8.a2-a4 Qa1xa4+ 9.Kh4-g3 Qa4-a3+ 10.Kg3-f4 Kc8-c7 11.Kf4-e4 Kc7-d6 12.Ke4-d4 Qa3-b3 13.Kd4-e4 Qb3-c2+ 14.Ke4-f3 Qc2-d3+ 15.Kf3-g2 Kd6-c7 16.Kg2-g1 Qd3-d2 17.Kg1-f1
-+ (-123.13) Depth: 29/43 00:00:14 33013kN, tb=277318
1...d2-d1Q 2.e7-e8N+ Kd6-d7 3.c7-c8Q+ Kd7xc8 4.Ke3xf2 Qd1-d8 5.Ne8-g7 Qd8-f8+ 6.Kf2-g3 Qf8xg7+ 7.Kg3-h4 Qg7-a1 8.a2-a4 Qa1xa4+ 9.Kh4-g3 Qa4-a3+ 10.Kg3-f4 Kc8-c7 11.Kf4-e4 Kc7-d6 12.Ke4-d4 Qa3-b3 13.Kd4-e4 Qb3-c2+ 14.Ke4-f3 Qc2-d3+ 15.Kf3-g2 Kd6-c7 16.Kg2-g1 Qd3-d2 17.Kg1-f1
-+ (-123.13) Depth: 29/43 00:00:15 36428kN, tb=296265
1...d2-d1Q
-+ (-123.20) Depth: 30/43 00:00:16 37414kN, tb=297882
1...d2-d1Q
-+ (-123.27) Depth: 30/43 00:00:16 37909kN, tb=298092
1...d2-d1Q
-+ (-123.38) Depth: 30/43 00:00:16 38321kN, tb=298153
1...d2-d1Q
-+ (-123.53) Depth: 30/43 00:00:16 38684kN, tb=298308
1...d2-d1Q
-+ (-#39) Depth: 30/43 00:00:17 39385kN, tb=299421
1...d2-d1Q 2.e7-e8N+ Kd6-d7 3.c7-c8Q+ Kd7xc8 4.Ke3xf2 Qd1-d8 5.Ne8-g7 Qd8-f8+ 6.Kf2-g3 Qf8xg7+ 7.Kg3-h4 Qg7-a1 8.a2-a4 Qa1xa4+ 9.Kh4-g3 Kc8-d7 10.Kg3-f2 Kd7-e8 11.Kf2-e3 Qa4-a3+ 12.Ke3-d4 Qa3-a2 13.Kd4-c5 Ke8-e7 14.Kc5-b6 Qa2-d5 15.Kb6-a6 Qd5-c6+ 16.Ka6-a5 Qc6-c4 17.Ka5-b6
-+ (-#44) Depth: 31/46 00:00:18 40853kN, tb=324040
1...d2-d1Q
-+ (-#35) Depth: 31/46 00:00:19 42658kN, tb=327382
1...d2-d1Q 2.e7-e8N+ Kd6-d7 3.c7-c8Q+ Kd7xc8 4.Ke3xf2 Qd1-d5 5.Ne8-f6 Qd5-d4+ 6.Kf2-g2 Qd4xf6 7.a2-a4 Qf6-c6+ 8.Kg2-h3 Qc6-d7+ 9.Kh3-g3 Qd7xa4 10.Kg3-f3 Qa4-a3+ 11.Kf3-e2 Qa3-g3 12.Ke2-d2 Qg3-f3 13.Kd2-c2 Qf3-e3 14.Kc2-b2 Qe3-d3 15.Kb2-c1 Kc8-c7 16.Kc1-b2 Kc7-d6 17.Kb2-a1
-+ (-#28) Depth: 31/46 00:00:21 46462kN, tb=358588
1...d2-d1Q 2.e7-e8N+ Kd6-d7 3.c7-c8Q+ Kd7xc8 4.Ke3xf2 Qd1-d5 5.Kf2-e3 Qd5-e5+ 6.Ke3-d2 Qe5xe8 7.Kd2-c1 Qe8-a4 8.Kc1-b2 Kc8-d7 9.Kb2-b1 Qa4-a3 10.Kb1-c2 Qa3xa2+ 11.Kc2-d3 Qa2-a3+ 12.Kd3-d2 Kd7-c7 13.Kd2-e2 Qa3-g3 14.Ke2-d2 Qg3-f3 15.Kd2-c2 Qf3-e3 16.Kc2-b2 Qe3-d3 17.Kb2-a2
-+ (-#28) Depth: 32/46 00:00:24 51809kN, tb=411307
1...d2-d1Q 2.e7-e8N+ Kd6-d7 3.c7-c8Q+ Kd7xc8 4.Ke3xf2 Qd1-d5 5.Kf2-e3 Qd5-e5+ 6.Ke3-d2 Qe5xe8 7.Kd2-c2 Qe8-a4+ 8.Kc2-b2 Kc8-c7 9.Kb2-b1 Qa4-a3 10.Kb1-c2 Qa3xa2+ 11.Kc2-d3 Qa2-a3+ 12.Kd3-e2 Kc7-c8 13.Ke2-d2 Qa3-f3 14.Kd2-c2 Qf3-e3 15.Kc2-b2 Qe3-d3 16.Kb2-c1 Kc8-c7 17.Kc1-b2
-+ (-#28) Depth: 33/46 00:00:26 55851kN, tb=464272
1...d2-d1Q 2.e7-e8N+ Kd6-d7 3.c7-c8Q+ Kd7xc8 4.Ke3xf2 Qd1-d7 5.Ne8-f6 Qd7-f5+ 6.Kf2-g2 Qf5xf6 7.Kg2-g3 Qf6-a6 8.Kg3-f3 Qa6xa2 9.Kf3-e3 Qa2-a3+ 10.Ke3-e2 Kc8-c7 11.Ke2-d2 Qa3-f3 12.Kd2-c2 Qf3-e3 13.Kc2-d1 Qe3-d3+ 14.Kd1-e1 Qd3-c2 15.Ke1-f1 Qc2-h2 16.Kf1-e1 Qh2-g2 17.Ke1-d1
-+ (-#24) Depth: 34/46 00:00:28 60633kN, tb=533089
1...d2-d1Q 2.e7-e8N+ Kd6-d7 3.c7-c8Q+ Kd7xc8 4.Ke3xf2 Qd1-d7 5.Ne8-f6 Qd7-f5+ 6.Kf2-g2 Qf5xf6 7.Kg2-g3 Qf6-a6 8.Kg3-f3 Qa6xa2 9.Kf3-e3 Qa2-a3+ 10.Ke3-e2 Kc8-c7 11.Ke2-d2 Qa3-f3 12.Kd2-c2 Qf3-e3 13.Kc2-d1 Qe3-d3+ 14.Kd1-e1 Qd3-c2 15.Ke1-f1 Kc7-d6 16.Kf1-e1 Qc2-g2 17.Ke1-d1
-+ (-#22) Depth: 35/46 00:00:33 68483kN, tb=618159
1...d2-d1Q 2.e7-e8N+ Kd6-d7 3.c7-c8Q+ Kd7xc8 4.Ke3xf2 Qd1-d7 5.Ne8-f6 Qd7-f5+ 6.Kf2-g2 Qf5xf6 7.Kg2-g3 Qf6-a6 8.Kg3-f3 Qa6xa2 9.Kf3-e3 Qa2-a3+ 10.Ke3-e2 Qa3-c3 11.Ke2-f2 Qc3-d2+ 12.Kf2-g3 Qd2-e2 13.Kg3-h3 Kc8-d7 14.Kh3-g3 Kd7-d6 15.Kg3-h3 Qe2-f3+ 16.Kh3-h2 Kd6-d5 17.Kh2-g1
-+ (-#21) Depth: 36/46 00:00:36 76064kN, tb=717479
1...d2-d1Q 2.e7-e8N+ Kd6-d7 3.c7-c8Q+ Kd7xc8 4.Ke3xf2 Qd1-d7 5.Ne8-f6 Qd7-f5+ 6.Kf2-g2 Qf5xf6 7.a2-a4 Qf6-c6+ 8.Kg2-f2 Qc6xa4 9.Kf2-e2 Qa4-a3 10.Ke2-d2 Qa3-f3 11.Kd2-c2 Qf3-e3 12.Kc2-b2 Kc8-d7 13.Kb2-c2 Kd7-d6 14.Kc2-b1 Qe3-d2 15.Kb1-a1 Kd6-d5 16.Ka1-b1 Kd5-c4 17.Kb1-a1
-+ (-#18) Depth: 37/46 00:00:42 88101kN, tb=882964
1...d2-d1Q 2.e7-e8N+ Kd6-d7 3.c7-c8Q+ Kd7xc8 4.Ke3xf2 Qd1-d7 5.Ne8-f6 Qd7-f5+ 6.Kf2-g2 Qf5xf6 7.a2-a4 Qf6-c6+ 8.Kg2-f2 Qc6xa4 9.Kf2-e2 Qa4-a3 10.Ke2-d2 Qa3-f3 11.Kd2-c2 Kc8-d7 12.Kc2-b2 Kd7-d6 13.Kb2-c2 Kd6-d5 14.Kc2-d2 Kd5-c4 15.Kd2-e1 Qf3-g2 16.Ke1-d1 Kc4-d3 17.Kd1-e1
-+ (-#17) Depth: 38/46 00:00:47 98873kN, tb=982091
1...d2-d1Q 2.e7-e8N+ Kd6-d7 3.c7-c8Q+ Kd7xc8 4.Ke3xf2 Qd1-d7 5.Ne8-f6 Qd7-f5+ 6.Kf2-g2 Qf5xf6 7.a2-a4 Qf6-c6+ 8.Kg2-f2 Qc6xa4 9.Kf2-e2 Qa4-a3 10.Ke2-d2 Qa3-f3 11.Kd2-c2 Kc8-d7 12.Kc2-b2 Kd7-d6 13.Kb2-c2 Kd6-d5 14.Kc2-d2 Kd5-c4 15.Kd2-e1 Qf3-g2 16.Ke1-d1 Kc4-d3 17.Kd1-e1
-+ (-#17) Depth: 39/46 00:00:53 110mN, tb=1081955
1...f2-f1Q 2.c7-c8N+ Kd6-d7 3.Ke3xd2 Qf1-a6 4.Nc8-b6+ Qa6xb6 5.e7-e8R Kd7xe8 6.Kd2-e2 Qb6-e6+ 7.Ke2-d2 Qe6xa2+ 8.Kd2-d3 Ke8-e7 9.Kd3-e3 Qa2-c2 10.Ke3-f4 Qc2-e2 11.Kf4-f5 Qe2-e3 12.Kf5-g6 Ke7-e6 13.Kg6-h5 Qe3-g3 14.Kh5-h6 Ke6-f6 15.Kh6-h5 Qg3-h3#
-+ (-#15) Depth: 40/46 00:01:57 265mN, tb=1928309
1...f2-f1Q 2.c7-c8N+ Kd6-d7 3.Ke3xd2 Qf1-a6 4.Nc8-b6+ Qa6xb6 5.e7-e8R Kd7xe8 6.Kd2-e2 Qb6-e6+ 7.Ke2-d2 Qe6xa2+ 8.Kd2-d3 Ke8-e7 9.Kd3-e3 Qa2-c2 10.Ke3-f4 Qc2-e2 11.Kf4-f5 Qe2-e3 12.Kf5-g6 Ke7-e6 13.Kg6-h5 Qe3-g3 14.Kh5-h6 Ke6-f6 15.Kh6-h5 Qg3-h3#
-+ (-#15) Depth: 41/46 00:02:07 289mN, tb=2059625
1...f2-f1Q 2.c7-c8N+ Kd6-d7 3.Ke3xd2 Qf1-a6 4.Nc8-b6+ Qa6xb6 5.e7-e8R Kd7xe8 6.Kd2-e2 Qb6-e6+ 7.Ke2-d2 Qe6xa2+ 8.Kd2-d3 Ke8-e7 9.Kd3-e3 Qa2-c2 10.Ke3-f4 Qc2-e2 11.Kf4-f5 Qe2-e3 12.Kf5-g6 Ke7-e6 13.Kg6-h5 Qe3-g3 14.Kh5-h6 Ke6-f6 15.Kh6-h5 Qg3-h3#
-+ (-#15) Depth: 42/46 00:02:19 316mN, tb=2228498
1...f2-f1Q 2.c7-c8N+ Kd6-d7 3.Ke3xd2 Qf1-a6 4.Nc8-b6+ Qa6xb6 5.e7-e8R Kd7xe8 6.Kd2-e2 Qb6-e6+ 7.Ke2-d2 Qe6xa2+ 8.Kd2-d3 Ke8-e7 9.Kd3-e3 Qa2-c2 10.Ke3-f4 Qc2-e2 11.Kf4-f5 Qe2-e3 12.Kf5-g6 Ke7-e6 13.Kg6-h5 Qe3-g3 14.Kh5-h6 Ke6-f6 15.Kh6-h5 Qg3-h3#
-+ (-#15) Depth: 43/46 00:02:35 353mN, tb=2539393
1...f2-f1Q 2.c7-c8N+ Kd6-d7 3.Ke3xd2 Qf1-a6 4.Nc8-b6+ Qa6xb6 5.e7-e8R Kd7xe8 6.Kd2-e2 Qb6-e6+ 7.Ke2-d2 Qe6xa2+ 8.Kd2-d3 Ke8-e7 9.Kd3-e3 Qa2-c2 10.Ke3-f4 Qc2-e2 11.Kf4-f5 Qe2-e3 12.Kf5-g6 Ke7-e6 13.Kg6-h5 Qe3-g3 14.Kh5-h6 Ke6-f6 15.Kh6-h5 Qg3-h3#
-+ (-#15) Depth: 44/46 00:02:48 384mN, tb=2806124
1...f2-f1Q 2.c7-c8N+ Kd6-d7 3.Ke3xd2 Qf1-a6 4.Nc8-b6+ Qa6xb6 5.e7-e8R Kd7xe8 6.Kd2-e2 Qb6-e6+ 7.Ke2-d2 Qe6xa2+ 8.Kd2-d3 Ke8-e7 9.Kd3-e3 Qa2-c2 10.Ke3-f4 Qc2-e2 11.Kf4-f5 Qe2-e3 12.Kf5-g6 Ke7-e6 13.Kg6-h5 Qe3-g3 14.Kh5-h6 Ke6-f6 15.Kh6-h5 Qg3-h3#
-+ (-#15) Depth: 45/46 00:03:04 420mN, tb=3134809
1...d2-d1Q 2.c7-c8N+ Kd6-c5 3.Ke3xf2 Qd1-d7 4.Kf2-e3 Qd7xc8 5.a2-a4 Qc8-h3+ 6.Ke3-d2 Qh3-d7+ 7.Kd2-e3 Qd7xe7+ 8.Ke3-d3 Kc5-d5 9.a4-a5 Qe7-a3+ 10.Kd3-e2 Kd5-e4 11.Ke2-f2 Qa3-f3+ 12.Kf2-g1 Qf3-g3+ 13.Kg1-h1 Ke4-f3 14.a5-a6 Qg3-g2#
-+ (-#14) Depth: 46/46 00:04:17 593mN, tb=4143001
1...d2-d1Q 2.c7-c8N+ Kd6-c5 3.Ke3xf2 Qd1-d7 4.Kf2-e3 Qd7xc8 5.a2-a4 Qc8-h3+ 6.Ke3-d2 Qh3-d7+ 7.Kd2-e3 Qd7xe7+ 8.Ke3-d3 Kc5-d5 9.a4-a5 Qe7-a3+ 10.Kd3-e2 Kd5-e4 11.Ke2-f2 Qa3-f3+ 12.Kf2-g1 Qf3-g3+