Vinvin wrote: ↑Tue Jun 02, 2020 3:08 pm
xr_a_y wrote: ↑Tue Jun 02, 2020 11:56 am
Does your engine see that black has won here ?
[d] 5rk1/1QR2p2/4pnpq/3p4/1P1PnP2/P3P3/BB2N1PP/6K1 b - - 0 26
Someone got a mate here ?
After 26...Qh4!, 5 best moves lead to mate.
Code: Select all
FEN: 5rk1/1QR2p2/4pnp1/3p4/1P1PnP1q/P3P3/BB2N1PP/6K1 w - - 1 27
Stockfish_x64_modern_2020_05_02:
67/7 04:56 3 386 379 928 11 404 832 -M3 27.Bc3 Qf2+ 28.Kh1 Qf1+ 29.Ng1 Nf2+
67/25 04:56 3 386 379 928 11 404 832 -M12 27.Rc1 Ng4 28.h3 Qf2+ 29.Kh1 Qxe3 30.hxg4 Nf2+ 31.Kh2 Nxg4+ 32.Kh1 Kg7 33.Qc8 Rxc8 34.Rxc8 Qxe2 35.Rc1 Ne3 36.Rc2 Qxc2 37.Bxd5 exd5 38.Kh2 Qxg2+
67/33 04:56 3 386 379 928 11 404 832 -M16 27.h3 Qf2+ 28.Kh2 Nd2 29.Kh1 Qxe2 30.Rc1 Nfe4 31.Bxd5 exd5 32.Qxd5 Ng3+ 33.Kh2 Qf2 34.Qc6 Ndf1+ 35.Rxf1 Nxf1+ 36.Kh1 Ng3+ 37.Kh2 Ne2 38.Qc1 Nxc1 39.Bxc1 Rc8 40.d5 Rc2 41.Bd2 Rxd2 42.Kh1 Qxg2+
67/35 04:56 3 386 379 928 11 404 832 -M17 27.g3 Qg4 28.Rc2 Qf3 29.Nc3 Ng4 30.Bxd5 Ngf2 31.Kf1 exd5 32.Qxd5 Rc8 33.Qxe4 Nxe4+ 34.Kg1 Rxc3 35.Bxc3 Qd1+ 36.Be1 Qxc2 37.Kf1 Qd3+ 38.Kg2 Qe2+ 39.Kg1 Qxe1+ 40.Kg2 Qe2+ 41.Kh3 Qf3 42.a4 Nf2+ 43.Kh4 Qg4+
67/51 04:56 3 386 379 928 11 404 832 -M25 27.Ng3 Ng4 28.Kf1 Nxg3+ 29.hxg3 Qxg3 30.Rc2 Nxe3+ 31.Ke2 Nxc2 32.Kd2 Qf2+ 33.Kc3 Ne1 34.b5 Qc2+ 35.Kb4 Qxb2+ 36.Kc5 Qxa3+ 37.Kb6 Qxa2 38.Qa7 Qc4 39.Qc7 Qa4 40.Qa7 Qxd4+ 41.Ka6 Qxf4 42.Qe7 Qa4+ 43.Kb6 Rb8+ 44.Qb7 Rxb7+ 45.Kxb7 Qxb5+ 46.Kc7 Nd3 47.g3 Nc5 48.g4 Qb7+ 49.Kd6 Ne4+ 50.Ke5 Qc7+ 51.Kd4 Qc3+
Just did a bit of an experiment with Brainlearn 8.0. Started with a 15m+10s game vs a recent Stockfish build. Then a number of selfplay games
against itself very gradually increasing the time control.
Last step was to back up the experience.bin file and then infinite analysis from the start pos.
Best it could find was #22 this is using 4 threads.
Analysis by BrainLearn 8.0 64 BMI2:
26...Qh4 27.Ng3 Ng4 28.Kf1 Nxg3+ 29.hxg3 Qxg3 30.Rc2 Nxe3+ 31.Ke2 Nxc2 32.Ba1 Qxg2+ 33.Kd3 Ne1+ 34.Ke3 Qxa2 35.Qc6 Qxa1 36.Kf2 Qxa3 37.Kxe1 Ra8 38.Qxa8+ Qxa8 39.Kd2 Qa2+ 40.Ke3 Qa3+ 41.Ke2 Qxb4 42.Kd3 Qxd4+ 43.Kc2 Qxf4 44.Kb3 Qd2 45.Ka3 Qb2+ 46.Ka4 Qb4+ 47.Kxb4
Black is clearly winning: -+ (-148.87) Depth: 46/55 00:01:57 992MN, tb=765528
26...Qh4 27.Ng3 Ng4 28.Kf1 Nxg3+ 29.hxg3 Qxg3 30.Rc2 Nxe3+ 31.Ke2 Nxc2 32.Ba1 Qxg2+ 33.Kd3 Ne1+ 34.Ke3 Qxa2 35.Qc6 Qxa1 36.Kf2 Qxa3 37.Kxe1 Ra8 38.Qxa8+ Qxa8 39.Kd2 Qa2+ 40.Ke3 Qa3+ 41.Ke2 Qxb4 42.Kd3 Qxd4+ 43.Kc2 Qxf4 44.Kb3 Qd2 45.Ka3 Qb2+ 46.Ka4 Qb4+ 47.Kxb4
Black mates: -+ (-#42 ++) Depth: 47/50 00:01:57 992MN, tb=765619
26...Qh4 27.Ng3 Ng4 28.Kf1 Nxg3+ 29.hxg3 Qxg3 30.Rc2 Nxe3+ 31.Ke2 Nxc2 32.Qc7 Qe1+ 33.Kd3 Qd1+ 34.Kc3 Nxd4 35.Bc4 dxc4 36.Kxc4 Qc2+ 37.Bc3 Ne2 38.Kc5 Qxc3+ 39.Kb6 Qxa3 40.Qc5 Qa8 41.Qd6 Rd8 42.Qc7 Rb8+ 43.Qxb8+ Qxb8+ 44.Kc6 Qxb4 45.g3 Nc3 46.f5 Qc4+ 47.Kd6 Nb5+ 48.Ke7 Qc7+ 49.Kf6 Qd8+ 50.Ke5 Qd4#
Black mates: -+ (-#25) Depth: 47/52 00:02:06 1026MN, tb=884288
26...Qh4 27.Ng3 Ng4 28.Kf1 Nxg3+ 29.hxg3 Qxg3 30.Rc2 Nxe3+ 31.Ke2 Nxc2 32.Qc7 Qe1+ 33.Kd3 Qd1+ 34.Kc3 Nxd4 35.Bc4 dxc4 36.Kxc4 Qc2+ 37.Bc3 Ne2 38.Kc5 Qxc3+ 39.Kb6 Qxa3 40.Qc5 Qa8 41.Qd6 Rd8 42.Qc7 Rb8+ 43.Qxb8+ Qxb8+ 44.Kc6 Qxb4 45.g3 Nc3 46.f5 Qc4+ 47.Kd6 Nb5+ 48.Ke7 Qc7+ 49.Kf6 Qd8+ 50.Ke5 Qd4#
Black is clearly winning: -+ (-149.07 --) Depth: 48/50 00:02:07 1035MN, tb=921133
26...Qh4 27.Ng3 Ng4 28.Kf1 Nxg3+ 29.hxg3 Qxg3 30.Rc2 Nxe3+ 31.Ke2 Nxc2 32.Qc7 Qe1+ 33.Kd3 Qd1+ 34.Kc3 Nxd4 35.Bc4 dxc4 36.Kxc4 Qc2+ 37.Bc3 Ne2 38.Kc5 Qxc3+ 39.Kb6 Qxa3 40.Qc5 Qa8 41.Qd6 Rd8 42.Qc7 Rb8+ 43.Qxb8+ Qxb8+ 44.Kc6 Qxb4 45.g3 Nc3 46.f5 Qc4+ 47.Kd6 Nb5+ 48.Ke7 Qc7+ 49.Kf6 Qd8+ 50.Ke5 Qd4#
Black mates: -+ (-#48 ++) Depth: 48/50 00:02:07 1035MN, tb=922673
26...Qh4 27.Ng3 Ng4 28.Kf1 Nxg3+ 29.hxg3 Qxg3 30.Rc2 Nxe3+ 31.Ke2 Nxc2 32.Bc1 Qe1+ 33.Kd3 Qd1+ 34.Kc3 Qxc1 35.b5 Ne1+ 36.Kb4 Qb2+ 37.Bb3 Nc2+ 38.Ka5 Qxb3 39.a4 Qb4+ 40.Kb6 Nxd4 41.f5 Qxa4 42.Kc5 Qc4+ 43.Kb6 Qxb5+ 44.Kc7 Qa5+ 45.Kd6 Rd8+ 46.Ke7 Nxf5+ 47.Kf6 Qc3+ 48.Kg5 Qg3+ 49.Kf6 Qh4+ 50.Ke5 Qd4#
Black mates: -+ (-#25) Depth: 48/50 00:02:09 1051MN, tb=1083446
26...Qh4 27.Ng3 Ng4 28.Kf1 Nxg3+ 29.hxg3 Qxg3 30.Rc2 Nxe3+ 31.Ke2 Nxc2 32.Qc7 Qe1+ 33.Kd3 Qd1+ 34.Kc3 Nxd4 35.Bc4 dxc4 36.Kxc4 Qc2+ 37.Bc3 Ne2 38.Kc5 Qxc3+ 39.Kb6 Qxa3 40.Qc5 Qa8 41.Qd6 Rd8 42.Qc7 Rb8+ 43.Qxb8+ Qxb8+ 44.Kc6 Qxb4 45.g3 Nc3 46.f5 Qc4+ 47.Kd6 Nb5+ 48.Ke7 Qc7+ 49.Kf6 Qd8+ 50.Ke5 Qd4#
Black mates: -+ (-#25) Depth: 49/50 00:02:11 1061MN, tb=1102067
26...Qh4 27.Ng3 Ng4 28.Kf1 Nxg3+ 29.hxg3 Qxg3 30.Rc2 Nxe3+ 31.Ke2 Nxc2 32.Qc7 Qe1+ 33.Kd3 Qd1+ 34.Kc3 Nxd4 35.Bc4 dxc4 36.Kxc4 Qc2+ 37.Bc3 Ne2 38.Kc5 Qxc3+ 39.Kb6 Qxa3 40.Qc5 Qa8 41.Qd6 Rd8 42.Qc7 Rb8+ 43.Qxb8+ Qxb8+ 44.Kc6 Qxb4 45.g3 Nc3 46.f5 Qc4+ 47.Kd6 Nb5+ 48.Ke7 Qc7+ 49.Kf6 Qd8+ 50.Ke5 Qd4#
Black mates: -+ (-#25) Depth: 50/50 00:02:14 1082MN, tb=1130217
26...Qh4 27.Ng3 Ng4 28.Kf1 Nxg3+ 29.hxg3 Qxg3 30.Rc2 Nxe3+ 31.Ke2 Nxc2 32.Bc1 Qe1+ 33.Kd3 Qd1+ 34.Kc3 Qxc1 35.b5 Ne1+ 36.Kb4 Qb2+ 37.Bb3 Nc2+ 38.Ka5 Qxb3 39.a4 Qb4+ 40.Kb6 Nxd4 41.f5 Qxa4 42.Kc5 Qc4+ 43.Kb6 Qxb5+ 44.Kc7 Qa5+ 45.Kd6 Rd8+ 46.Ke7 Nxf5+ 47.Kf6 Qc3+ 48.Kg5 Qg3+ 49.Kf6 Qh4+ 50.Ke5 Qd4#
Black mates: -+ (-#25) Depth: 51/54 00:02:22 1140MN, tb=1509099
26...Qh4 27.Ng3 Ng4 28.Kf1 Nxg3+ 29.hxg3 Qxg3 30.Rc2 Nxe3+ 31.Ke2 Nxc2 32.Bc1 Qe1+ 33.Kd3 Qd1+ 34.Kc3 Qxc1 35.b5 Ne1+ 36.Kb4 Qb2+ 37.Bb3 Nc2+ 38.Ka5 Qxb3 39.a4 Qb4+ 40.Kb6 Nxd4 41.f5 Qxa4 42.Kc5 Qc4+ 43.Kb6 Qxb5+ 44.Kc7 Qa5+ 45.Kd6 Rd8+ 46.Ke7 Nxf5+ 47.Kf6 Qc3+ 48.Kg5 Qg3+ 49.Kf6 Qh4+ 50.Ke5 Qd4#
Black mates: -+ (-#25) Depth: 52/50 00:02:29 1184MN, tb=1561051
26...Qh4 27.Ng3 Ng4 28.Kf1 Nxg3+ 29.hxg3 Qxg3 30.Rc2 Nxe3+ 31.Ke2 Nxc2 32.Bc1 Qe1+ 33.Kd3 Qd1+ 34.Kc3 Qxc1 35.b5 Ne1+ 36.Kb4 Qb2+ 37.Bb3 Nc2+ 38.Ka5 Qxb3 39.a4 Qb4+ 40.Kb6 Nxd4 41.f5 Qxa4 42.Kc5 Qc4+ 43.Kb6 Qxb5+ 44.Kc7 Qa5+ 45.Kd6 Rd8+ 46.Ke7 Nxf5+ 47.Kf6 Qc3+ 48.Kg5 Qg3+ 49.Kf6 Qh4+ 50.Ke5 Qd4#
Black mates: -+ (-#25) Depth: 53/50 00:02:38 1244MN, tb=1688393
26...Qh4 27.Ng3 Ng4 28.Kf1 Nxg3+ 29.hxg3 Qxg3 30.Rc2 Nxe3+ 31.Ke2 Nxc2 32.Bc1 Qe1+ 33.Kd3 Qd1+ 34.Kc3 Qxc1 35.b5 Ne1+ 36.Kb4 Qb2+ 37.Bb3 Nc2+ 38.Ka5 Qxb3 39.a4 Qb4+ 40.Kb6 Nxd4 41.f5 Qxa4 42.Kc5 Qc4+ 43.Kb6 Qxb5+ 44.Kc7 Qa5+ 45.Kd6 Rd8+ 46.Ke7 Nxf5+ 47.Kf6 Qc3+ 48.Kg5 Qg3+ 49.Kf6 Qh4+ 50.Ke5 Qd4#
Black mates: -+ (-#25) Depth: 54/50 00:02:43 1276MN, tb=1723978
26...Qh4 27.Ng3 Ng4 28.Kf1 Nxg3+ 29.hxg3 Qxg3 30.Rc2 Nxe3+ 31.Ke2 Nxc2 32.Bc1 Qe1+ 33.Kd3 Qd1+ 34.Kc3 Qxc1 35.b5 Ne1+ 36.Kb4 Qb2+ 37.Bb3 Nc2+ 38.Ka5 Qxb3 39.a4 Qb4+ 40.Kb6 Nxd4 41.f5 Qxa4 42.Kc5 Qc4+ 43.Kb6 Qxb5+ 44.Kc7 Qa5+ 45.Kd6 Rd8+ 46.Ke7 Nxf5+ 47.Kf6 Qc3+ 48.Kg5 Qg3+ 49.Kf6 Qh4+ 50.Ke5 Qd4#
Black mates: -+ (-#25) Depth: 55/50 00:02:53 1343MN, tb=1857858
26...Qh4 27.Ng3 Ng4 28.Kf1 Nxg3+ 29.hxg3 Qxg3 30.Rc2 Nxe3+ 31.Ke2 Nxc2 32.Bc1 Qe1+ 33.Kd3 Qd1+ 34.Kc3 Qxc1 35.b5 Ne1+ 36.Kb4 Qb2+ 37.Bb3 Nc2+ 38.Ka5 Qxb3 39.a4 Qb4+ 40.Kb6 Nxd4 41.f5 Qxa4 42.Kc5 Qc4+ 43.Kb6 Qxb5+ 44.Kc7 Qa5+ 45.Kd6 Rd8+ 46.Qd7 Qb4+ 47.Ke5 Nc6+ 48.Qxc6 Qe4+ 49.Kf6 Qxf5+ 50.Ke7 Qg5#
Black mates: -+ (-#25) Depth: 56/50 00:03:47 1688MN, tb=2303081
26...Qh4 27.Ng3 Ng4 28.Kf1 Nxg3+ 29.hxg3 Qxg3 30.Rc2 Nxe3+ 31.Ke2 Nxc2 32.Bc1 Qe1+ 33.Kd3 Qd1+ 34.Kc3 Qxc1 35.b5 Ne1+ 36.Kb4 Qb2+ 37.Bb3 Nc2+ 38.Ka5 Qxb3 39.a4 Qb4+ 40.Kb6 Nxd4 41.f5 Qxa4 42.g3 Qxb5+ 43.Kc7 Qc5+ 44.Kd7 Nf3 45.Qc7 Ne5+ 46.Qxe5 Qc8+ 47.Kd6 Rd8+ 48.Ke7 Rd7+ 49.Kf6 Qd8#
Black mates: -+ (-#24) Depth: 57/48 00:03:48 1695MN, tb=2345112
26...Qh4 27.Ng3 Ng4 28.Kf1 Nxg3+ 29.hxg3 Qxg3 30.Rc2 Nxe3+ 31.Ke2 Nxc2 32.Bc1 Qe1+ 33.Kd3 Qd1+ 34.Kc3 Qxc1 35.b5 Ne1+ 36.Kb4 Qb2+ 37.Bb3 Nc2+ 38.Ka5 Qxb3 39.a4 Qb4+ 40.Kb6 Nxd4 41.f5 Qxa4 42.g3 Qxb5+ 43.Kc7 Qc5+ 44.Kd7 Nf3 45.Qc7 Ne5+ 46.Qxe5 Qc8+ 47.Kd6 Rd8+ 48.Ke7 Rd7+ 49.Kf6 Qd8#
Black mates: -+ (-#24) Depth: 58/48 00:03:52 1721MN, tb=2424919
26...Qh4 27.Ng3 Ng4 28.Kf1 Nxg3+ 29.hxg3 Qxg3 30.Rc2 Nxe3+ 31.Ke2 Nxc2 32.Bc1 Qe1+ 33.Kd3 Qd1+ 34.Kc3 Qxc1 35.b5 Ne1+ 36.Kb4 Qb2+ 37.Bb3 Nc2+ 38.Ka5 Qxb3 39.a4 Qb4+ 40.Kb6 Nxd4 41.f5 Qxa4 42.g3 Qxb5+ 43.Kc7 Qc5+ 44.Kd7 Nf3 45.Qc7 Ne5+ 46.Qxe5 Qc8+ 47.Kd6 Rd8+ 48.Ke7 Rd7+ 49.Kf6 Qd8#
Black mates: -+ (-#24) Depth: 59/48 00:04:10 1832MN, tb=2943549
26...Qh4 27.Ng3 Ng4 28.Kf1 Nxg3+ 29.hxg3 Qxg3 30.Rc2 Nxe3+ 31.Ke2 Nxc2 32.Qc7 Qe1+ 33.Kd3 Qd1+ 34.Kc3 Nxd4 35.Bc4 dxc4 36.Kxc4 Qc2+ 37.Bc3 Ne2 38.Qb7 Qxc3+ 39.Kb5 Qxa3 40.f5 Nd4+ 41.Kc4 Rd8 42.Kc5 Qc3+ 43.Kb6 Qxb4+ 44.Ka6 Rd6+ 45.Ka7 Qa5+ 46.Kb8 Rd8+ 47.Qc8 Qb6+ 48.Ka8 Rxc8#
Black mates: -+ (-#23) Depth: 60/48 00:05:16 2280MN, tb=4335554
26...Qh4 27.Ng3 Ng4 28.Kf1 Nxg3+ 29.hxg3 Qxg3 30.Rc2 Nxe3+ 31.Ke2 Nxc2 32.Qc7 Qe1+ 33.Kd3 Qd1+ 34.Kc3 Nxd4 35.Bc4 dxc4 36.Kxc4 Qc2+ 37.Bc3 Ne2 38.Qb7 Qxc3+ 39.Kb5 Qxa3 40.f5 Nd4+ 41.Kc4 Rd8 42.Kc5 Qc3+ 43.Kb6 Qxb4+ 44.Ka6 Rd6+ 45.Ka7 Qa5+ 46.Kb8 Rd8+ 47.Qc8 Qb6+ 48.Ka8 Rxc8#
Black mates: -+ (-#23) Depth: 61/46 00:05:53 2473MN, tb=5345339
26...Qh4 27.Ng3 Ng4 28.Kf1 Nxg3+ 29.hxg3 Qxg3 30.Rc2 Nxe3+ 31.Ke2 Nxc2 32.Qc7 Qe1+ 33.Kd3 Qd1+ 34.Kc3 Nxd4 35.Bc4 dxc4 36.Kxc4 Qc2+ 37.Bc3 Ne2 38.Qb7 Nxc3 39.Kc5 Qd3 40.Kb6 Nd5+ 41.Ka5 Qxa3+ 42.Kb5 Rd8 43.Qxd5 Rxd5+ 44.Kb6 Qxb4+ 45.Kc7 Qc5+ 46.Kb8 Qb6+ 47.Kc8 Rd8#
Black mates: -+ (-#22) Depth: 62/46 00:06:25 2660MN, tb=5701759
26...Qh4 27.Ng3 Ng4 28.Kf1 Nxg3+ 29.hxg3 Qxg3 30.Rc2 Nxe3+ 31.Ke2 Nxc2 32.Qc7 Qe1+ 33.Kd3 Qd1+ 34.Kc3 Nxd4 35.Bc4 dxc4 36.Kxc4 Qc2+ 37.Bc3 Ne2 38.Qb7 Nxc3 39.Kc5 Qd3 40.Kb6 Nd5+ 41.Ka5 Qxa3+ 42.Kb5 Rd8 43.Qxd5 Rxd5+ 44.Kb6 Qxb4+ 45.Kc7 Qc5+ 46.Kb8 Qb6+ 47.Kc8 Rd8#
Black mates: -+ (-#22) Depth: 63/44 00:06:35 2720MN, tb=5736816
26...Qh4 27.Ng3 Ng4 28.Kf1 Nxg3+ 29.hxg3 Qxg3 30.Rc2 Nxe3+ 31.Ke2 Nxc2 32.Qc7 Qe1+ 33.Kd3 Qd1+ 34.Kc3 Nxd4 35.Bc4 dxc4 36.Kxc4 Qc2+ 37.Bc3 Ne2 38.Qb7 Nxc3 39.Kc5 Qd3 40.Kb6 Nd5+ 41.Ka5 Qxa3+ 42.Kb5 Rd8 43.Qxd5 Rxd5+ 44.Kb6 Qxb4+ 45.Kc7 Qc5+ 46.Kb8 Qb6+ 47.Kc8 Rd8#
Black mates: -+ (-#22) Depth: 64/44 00:07:16 2933MN, tb=5844745
26...Qh4 27.Ng3 Ng4 28.Kf1 Nxg3+ 29.hxg3 Qxg3 30.Rc2 Nxe3+ 31.Ke2 Nxc2 32.Qc7 Qe1+ 33.Kd3 Qd1+ 34.Kc3 Nxd4 35.Bc4 dxc4 36.Kxc4 Qc2+ 37.Bc3 Ne2 38.Qb7 Nxc3 39.Kc5 Qd3 40.Kb6 Nd5+ 41.Ka5 Qxa3+ 42.Kb5 Rd8 43.Qxd5 Rxd5+ 44.Kb6 Qxb4+ 45.Kc7 Qc5+ 46.Kb8 Qb6+ 47.Kc8 Rd8#
Black mates: -+ (-#22) Depth: 65/44 00:07:24 2983MN, tb=5859837
26...Qh4 27.Ng3 Ng4 28.Kf1 Nxg3+ 29.hxg3 Qxg3 30.Rc2 Nxe3+ 31.Ke2 Nxc2 32.Qc7 Qe1+ 33.Kd3 Qd1+ 34.Kc3 Nxd4 35.Bc4 dxc4 36.Kxc4 Qc2+ 37.Bc3 Ne2 38.Qb7 Nxc3 39.Kc5 Qd3 40.Kb6 Nd5+ 41.Ka5 Qxa3+ 42.Kb5 Rd8 43.Qxd5 Rxd5+ 44.Kb6 Qxb4+ 45.Kc7 Qc5+ 46.Kb8 Qb6+ 47.Kc8 Rd8#
Black mates: -+ (-#22) Depth: 66/44 00:09:02 3483MN, tb=6641769
26...Qh4 27.Ng3 Ng4 28.Kf1 Nxg3+ 29.hxg3 Qxg3 30.Rc2 Nxe3+ 31.Ke2 Nxc2 32.Kd2 Qf2+ 33.Kc3 Ne1 34.b5 Qc2+ 35.Kb4 Qxb2+ 36.Bb3 Nc2+ 37.Ka5 Qxb3 38.a4 Qb4+ 39.Kb6 Nxd4 40.f5 Qxa4 41.g3 Qxb5+ 42.Kc7 Qc5+ 43.Kd7 Nf3 44.Qc7 Ne5+ 45.Qxe5 Qc8+ 46.Kd6 Rd8+ 47.Ke7 Rd7+ 48.Kf6 Qd8#
Black mates: -+ (-#23) Depth: 67/46 00:09:49 3732MN, tb=6663873
26...Qh4 27.Ng3 Ng4 28.Kf1 Nxg3+ 29.hxg3 Qxg3 30.Rc2 Nxe3+ 31.Ke2 Nxc2 32.Kd2 Qf2+ 33.Kc3 Ne1 34.b5 Qc2+ 35.Kb4 Qxb2+ 36.Ka5 Qxa3+ 37.Kb6 Qxa2 38.Qc7 Qxg2 39.f5 gxf5 40.Qf4 Nf3 41.Ka6 Qf2 42.Kb7 f6 43.Ka6 Qxd4 44.Qxd4 Nxd4 45.b6 f4 46.b7 f3 47.Ka7 f2 48.b8Q Rxb8 49.Kxb8 f1Q 50.Kb7 Qb5+ 51.Kc8 Qb6 52.Kd7 Kf7 53.Kc8 Nb5 54.Kd7 Qc7#
Black mates: -+ (-#29) Depth: 68/78 00:22:20 7885MN, tb=91103177
26...Qh4 27.Ng3 Ng4 28.Kf1 Nxg3+ 29.hxg3 Qxg3 30.Rc2 Nxe3+ 31.Ke2 Nxc2 32.Kd2 Qf2+ 33.Kc3 Ne1 34.b5 Qc2+ 35.Kb4 Qxb2+ 36.Ka5 Qxa3+ 37.Kb6 Qxa2 38.Kc7 Qc4+ 39.Qc6 Nc2 40.Qxc4 dxc4 41.d5 Nd4 42.dxe6 fxe6 43.Kd6 c3 44.Ke5 c2 45.Kxd4 c1Q 46.f5 Rxf5 47.g3 Rf3 48.Ke5 Qc3+ 49.Kxe6 Qd4 50.Ke7 Re3#
Black mates: -+ (-#25) Depth: 69/50 00:22:40 7993MN, tb=91394646
26...Qh4 27.Ng3 Ng4 28.Kf1 Nxg3+ 29.hxg3 Qxg3 30.Rc2 Nxe3+ 31.Ke2 Nxc2 32.Kd2 Qf2+ 33.Kc3 Ne1 34.b5 Qc2+ 35.Kb4 Qxb2+ 36.Ka5 Qxa3+ 37.Kb6 Qxa2 38.Kc7 Qc4+ 39.Qc6 Nc2 40.Qxc4 dxc4 41.d5 Nd4 42.dxe6 fxe6 43.Kd6 c3 44.Ke5 c2 45.Kxd4 c1Q 46.f5 Rxf5 47.g3 Rf3 48.Ke5 Qc3+ 49.Kxe6 Qd4 50.Ke7 Re3#
Black mates: -+ (-#25) Depth: 70/50 00:23:00 8111MN, tb=91740326
(, 05.06.2020)
So this sort of learning might be an option for postions where a TB or other mate score can be found quickly, but further progress is extremely difficult. Just need more engines with learning!
Andrew