This time a little more smp variance of new Crystal. Best trial 1", second best 6", worst 27"MikeGL wrote: ↑Mon Apr 13, 2020 7:33 pm I don't like to open another thread and bombard the front page with test positions.
So I will just append this one here, more difficult I guess since this one requires double R sac for a mating attack on Kg1 using the light squares.
Black to play and win
[d]1k1r2r1/pppbqN2/1n1b1n1p/4p3/1P5P/PB1PP3/1BQN1PP1/2R2RK1 b - - 0 21
bm Nfd5!! (setting up a trap) if white plays Nxd8 then ... Qxh4! with a mating attack (threat Rxg2+)
I am not sure if there are other alternate mating lines than the text move.
Here's second best, again with 24 threads of 12x3GHz, 32G hash
1k1r2r1/pppbqN2/1n1b1n1p/4p3/1P5P/PB1PP3/1BQN1PP1/2R2RK1 b - - 0 1
Analysis by Crystal 080420 64 POPCNT:
Code: Select all
21...Rc8 22.e4 Rg7 23.Nxd6 cxd6 24.Qd1 Bh3
+- (2.22) Depth: 7/10 00:00:00 138kN
21...Bh3 22.g3 Rc8 23.Rfd1 Rg7 24.Nxd6 cxd6 25.Qb1 Qd7 26.Rxc8+ Qxc8
+- (2.37) Depth: 8/12 00:00:00 294kN
21...Rc8 22.Nf3 Bh3 23.g3 Nbd5 24.N7xe5 Nxe3 25.fxe3 Rxg3+ 26.Kh1 Bxf1 27.Rxf1
+- (1.74) Depth: 9/14 00:00:00 489kN
21...Rc8 22.Nxd6 cxd6 23.Qb1 Rg7 24.Rxc8+ Bxc8 25.f4 exf4 26.Bxf6 Qxf6 27.Rxf4 Qg6
+- (2.06) Depth: 10/20 00:00:00 666kN
21...Rc8 22.Nxd6 cxd6 23.Qd1 Rxc1 24.Qxc1 Nfd5 25.Nc4 Bh3 26.g3 Bxf1
+/- (1.38) Depth: 11/23 00:00:00 1298kN
21...Rc8 22.Nxd6 cxd6 23.Qd1 Rxc1 24.Qxc1 Nfd5 25.Ne4 Qxh4 26.Qd2 Rg7 27.f3 Ba4 28.Ba2 Qd8
+- (1.71) Depth: 12/23 00:00:00 2251kN
21...Rc8 22.Nxd6 cxd6 23.Qd1 Rxc1 24.Qxc1 Rg7 25.g3 Nfd5 26.Ne4 Qxh4 27.Qa1 Qh5 28.Nxd6 Nxe3 29.Nf5 Ng4 30.Nh4 Bb5
+/- (1.55) Depth: 13/26 00:00:00 3984kN
21...Rc8 22.Nxd6 cxd6 23.Qd1 Rxc1 24.Bxc1 Bg4 25.f3 Be6 26.Ne4 Nbd5 27.Qc2 Nxe4 28.fxe4 Nc7 29.Bxe6 Nxe6 30.Qf2 Qg7
+/- (1.45) Depth: 14/30 00:00:00 7197kN
21...Rc8 22.Nxd6 cxd6 23.Qd1 Rxc1 24.Bxc1 d5 25.Nf3 Bh3 26.Ne1 Nfd7 27.e4 Qxh4 28.Qf3 Rc8 29.Qxh3 Qxh3 30.gxh3 Rxc1 31.Nc2 Rxf1+ 32.Kxf1 dxe4 33.dxe4 Nf6 34.f3 Nh5 35.Ne3 Nf4 36.h4
+- (1.74) Depth: 15/34 00:00:01 9332kN
21...Rc8 22.Nxd6 cxd6 23.Qd1 Rxc1 24.Bxc1 d5 25.Nf3 Bh3 26.Ne1 Nfd7 27.e4 Qxh4 28.Qf3 Rc8 29.Qxh3 Qxh3 30.gxh3 Rxc1 31.Nc2 Rxf1+ 32.Kxf1 dxe4
+- (1.75) Depth: 16/34 00:00:01 9410kN
21...Nbd5 22.Nxd6 cxd6 23.g3 Qe6 24.d4 Rc8 25.Bxd5 Qxd5 26.Qb3 Qxb3 27.Nxb3 e4 28.d5 Nxd5 29.Nd2 Bf5 30.Kg2 b5 31.Bd4 Kb7 32.Rh1 Rxc1
+/- (1.41) Depth: 17/36 00:00:02 27351kN
21...Nfd5 22.Nxd8 Qg7 23.g3 Nxe3 24.Qb1 Nxf1 25.Rxf1 Rxd8 26.Ne4 Bc6 27.Rc1 Rf8 28.Rxc6 bxc6 29.Qc2 Kb7 30.Bc1 Qg6 31.Qd2 Rh8 32.Qa2 Rf8 33.Be3 Be7 34.Bc5 Bxc5 35.Nxc5+ Ka8 36.Ne6
+/- (1.46) Depth: 18/36 00:00:02 39072kN
21...Nbd5 22.Bxd5 Nxd5 23.Nxd8 Qg7 24.g3 Nxe3 25.Qb3 Nxf1 26.Rxf1 Rxd8 27.Ne4 Rf8 28.f3 Qg6 29.Qc2 Bh3 30.Rf2 Be6 31.Bc3 Bf5 32.Kh2 Qe6 33.Qd2 Bxe4 34.dxe4
+/- (1.00) Depth: 19/36 00:00:03 47269kN
21...Nbd5 22.Bxd5
+/- (1.09 --) Depth: 20/33 00:00:03 56087kN
21...Nbd5
+/- (0.94 ++) Depth: 20/46 00:00:04 64242kN
21...Nbd5
+/- (0.74 ++) Depth: 20/46 00:00:04 67613kN
21...Nbd5
+/= (0.47 ++) Depth: 20/46 00:00:04 73509kN
21...Nbd5
= (0.11 ++) Depth: 20/46 00:00:05 77027kN
21...Nfd5
=/+ (-0.36 ++) Depth: 20/46 00:00:06 93247kN
21...Nfd5
-/+ (-0.97 ++) Depth: 20/46 00:00:06 101MN
21...Nfd5
-+ (-1.76 ++) Depth: 20/46 00:00:07 112MN
21...Nfd5 22.Nxd8 Qxh4 23.Nf3 Rxg2+ 24.Kxg2 Qg4+ 25.Kh2 Qxf3 26.Nf7 Qxf7 27.Rh1 Qg6 28.e4 Qh5+ 29.Kg1 Qg4+ 30.Kf1 Qf3 31.Bxd5 Qxh1+ 32.Ke2 Qg2 33.Ke3 Bg4 34.Kd2 Nxd5 35.exd5 Qf3 36.Qc4 Qxf2+ 37.Kc3 Bf3 38.a4 Qg2 39.Qh4
-/+ (-1.06) Depth: 20/54 00:00:08 130MN
21...Nfd5 22.Nxd8
-/+ (-0.96 --) Depth: 21/49 00:00:08 139MN
21...Nfd5 22.Nxd8
-/+ (-0.86 --) Depth: 21/49 00:00:08 140MN
21...Nfd5
-/+ (-0.96 ++) Depth: 21/52 00:00:08 141MN
21...Nfd5
-/+ (-1.16 ++) Depth: 21/53 00:00:09 143MN
21...Nfd5 22.Nxd8 Qxh4 23.Bxd5 Nxd5 24.Nf3 Rxg2+ 25.Kxg2 Qg4+ 26.Kh2 Qxf3 27.Nf7 Qxf7 28.Rh1 Qg6 29.e4 Qh5+ 30.Kg1 Qg4+ 31.Kf1 Qf3 32.exd5 Qxh1+ 33.Ke2 Bg4+ 34.Kd2 Qf3 35.Qc4 Qxf2+ 36.Kc3 h5 37.Kb3 Bf3 38.Qb5 a6 39.Qc4 Qg2
-/+ (-1.19) Depth: 21/53 00:00:09 144MN
21...Nfd5 22.Nxd8 Qxh4 23.Bxd5 Nxd5 24.Nf3 Rxg2+ 25.Kxg2 Qg4+ 26.Kh2 Qxf3 27.Nf7 Qxf7 28.Rh1 Qg6 29.e4 Qh5+ 30.Kg1 Qg4+ 31.Kf1 Qf3 32.exd5 Qxh1+ 33.Ke2 Bg4+ 34.Kd2 Qf3 35.Qc4 Qxf2+ 36.Kc3 h5 37.Kb3 Bf3 38.Qb5 a6 39.Qe8+ Ka7 40.Bxe5 Qe3
-/+ (-1.21) Depth: 22/39 00:00:09 149MN
21...Nfd5 22.Nxd8
-/+ (-1.11 --) Depth: 23/50 00:00:10 160MN
21...Nfd5
-/+ (-1.21 ++) Depth: 23/52 00:00:10 162MN
21...Nfd5
-/+ (-1.36 ++) Depth: 23/60 00:00:10 167MN
21...Nfd5
-/+ (-1.56 ++) Depth: 23/60 00:00:11 182MN
21...Nfd5 22.Nxd8 Qxh4 23.Nf3 Rxg2+ 24.Kxg2 Qg4+ 25.Kh2 Qxf3 26.Nf7 Qxf7 27.Rh1 Qg6 28.e4 Qh5+ 29.Kg1 Qg4+ 30.Kf1 Qf3 31.Bxd5 Nxd5 32.exd5 Qxh1+ 33.Ke2 Bg4+ 34.Kd2 Qf3 35.Qc4 Qxf2+ 36.Kc3 h5 37.Qb5 h4 38.Rc2 Qg3 39.Qe8+ Bc8 40.Rd2 h3 41.Kc2 h2
-/+ (-1.34) Depth: 23/60 00:00:11 184MN
21...Nfd5
-/+ (-1.44 ++) Depth: 24/53 00:00:12 193MN
21...Nfd5 22.Nxd8
-/+ (-1.24 --) Depth: 24/57 00:00:12 201MN
21...Nfd5 22.Nxd8
-/+ (-1.09 --) Depth: 24/57 00:00:13 209MN
21...Nfd5 22.Nxd8
-/+ (-0.89 --) Depth: 24/57 00:00:14 234MN
21...Nfd5
-/+ (-1.07 ++) Depth: 24/64 00:00:15 246MN
21...Nfd5 22.Nxd8 Qxh4 23.Nf3 Rxg2+ 24.Kxg2 Qg4+ 25.Kh2 Qxf3 26.Nf7 Qxf7 27.f3 Qh5+ 28.Kg1 e4 29.Bxd5 Nxd5 30.fxe4 Nxe3 31.Rf8+ Bc8 32.Qd2 Qg5+ 33.Kf2 Ng4+ 34.Ke2 Qxd2+ 35.Kxd2 Bxf8 36.Rf1 Bd6 37.Rf7 b6 38.d4 Bg3 39.Rf3 Bh4 40.d5
-/+ (-1.09) Depth: 24/64 00:00:15 247MN
21...Nfd5
-/+ (-1.19 ++) Depth: 25/54 00:00:16 258MN
21...Nfd5
-/+ (-1.29 ++) Depth: 25/54 00:00:16 260MN
21...Nfd5
-/+ (-1.43 ++) Depth: 25/54 00:00:16 266MN
21...Nfd5 22.Nxd8 Qxh4 23.Nf3 Rxg2+ 24.Kxg2 Qh3+ 25.Kg1 Qg4+ 26.Kh2 Qxf3 27.Nf7 Qxf7 28.f3 Qh5+ 29.Kg1 e4 30.Bxd5 Nxd5 31.Qg2 Nxe3 32.Qg8+ Bc8 33.Rf2 exf3 34.Re1 Ng4 35.Re8 Bh2+ 36.Kf1 Qh3+ 37.Ke1 Nxf2 38.Kxf2 Bd6 39.Bd4 b6 40.Ke3 Qf5 41.Kf2 Kb7 42.Rxc8 Qxc8 43.Qd5+ Kb8 44.Qxf3
-/+ (-1.24) Depth: 25/54 00:00:16 267MN
21...Nfd5 22.Nxd8
-/+ (-1.14 --) Depth: 26/64 00:00:18 305MN
21...Nfd5 22.Nxd8
-/+ (-1.04 --) Depth: 26/64 00:00:20 324MN
21...Nfd5 22.Nxd8
-/+ (-0.90 --) Depth: 26/64 00:00:22 364MN
21...Nfd5 22.Nxd8
=/+ (-0.69 --) Depth: 26/64 00:00:25 411MN
21...Nfd5
-/+ (-1.03 ++) Depth: 26/64 00:00:25 411MN
21...Nfd5
-/+ (-1.39 ++) Depth: 26/64 00:00:25 417MN
21...Nfd5 22.Nxd8 Qxh4 23.Nf3 Rxg2+ 24.Kxg2 Qg4+ 25.Kh2 Qxf3 26.Nf7 Qxf7 27.f3 Qh5+ 28.Kg1 Nxe3 29.Qd2 e4 30.Rf2 Bf4 31.fxe4 Qg4+ 32.Rg2 Nxg2 33.Qxg2 Be3+ 34.Kh1 Qh5+ 35.Qh2 Bh3 36.Rf1 Bg2+ 37.Kxg2 Qe2+ 38.Kh3 Qxf1+ 39.Qg2 Qxd3 40.Qg8+ Nc8 41.Bc4 Qxe4 42.Be6 Qh1+ 43.Kg3 Qg1+ 44.Kf3 Qxg8 45.Bxg8 Bg5 46.a4 Ne7 47.Bc4 b6 48.a5 Kb7 49.axb6 axb6 50.b5
-/+ (-0.80) Depth: 26/64 00:00:30 487MN
21...Nfd5
-/+ (-0.90 ++) Depth: 27/37 00:00:30 487MN
21...Nfd5
-/+ (-1.00 ++) Depth: 27/37 00:00:30 487MN
21...Nfd5
-/+ (-1.15 ++) Depth: 27/37 00:00:30 488MN
21...Nfd5
-/+ (-1.35 ++) Depth: 27/44 00:00:30 489MN
21...Nfd5
-+ (-1.62 ++) Depth: 27/50 00:00:31 510MN
21...Nfd5 22.Nxd8 Qxh4 23.g3 Rxg3+ 24.fxg3 Qxg3+ 25.Kh1 Qh3+ 26.Kg1 Nxe3 27.Ne4 Nxc2 28.Rxc2 Qxd3 29.Nxd6 Qxb3 30.Rf8 Qg3+ 31.Kh1 cxd6 32.Nc6+ Kc7 33.Nxe5+ Bc6+ 34.Nxc6 bxc6 35.Rf7+ Nd7 36.Rg2 Qh3+ 37.Kg1 Kb6 38.Rgg7 Qe3+ 39.Kh2 Qe2+ 40.Kh1 Kb5 41.Rxd7 Qxb2 42.Rxa7 Qe2 43.Rgc7 Qf3+ 44.Kg1 h5 45.Rf7 Qe3+ 46.Kg2 h4 47.Rh7 Qg3+ 48.Kf1 h3
-+ (-1.61) Depth: 27/74 00:00:36 593MN
21...Nfd5
-+ (-1.71 ++) Depth: 28/58 00:00:38 626MN
21...Nfd5
-+ (-1.81 ++) Depth: 28/86 00:00:47 767MN
21...Nfd5
-+ (-1.96 ++) Depth: 28/86 00:00:52 852MN
21...Nfd5 22.Nxd8
-/+ (-1.52 --) Depth: 28/86 00:00:52 855MN
21...Nfd5
-+ (-1.84 ++) Depth: 28/86 00:00:52 857MN
21...Nfd5 22.Nxd8 Qxh4 23.Nf3 Rxg2+ 24.Kxg2 Qg4+ 25.Kh2 Qxf3 26.Nf7 Qxf7 27.Rh1 Qg6 28.e4 Qh5+ 29.Kg1 Qg4+ 30.Kf1 Qf3 31.Bxd5 Nxd5 32.exd5 Qxh1+ 33.Ke2 Bg4+ 34.Kd2 Qf3 35.Qa4 a6 36.Kc2 h5 37.Bc3 Qe2+ 38.Kb1 Qxd3+ 39.Kb2 Bf3 40.Rg1 Bxd5 41.Rd1 Qc4 42.Rxd5 Qxd5 43.Qe8+ Ka7 44.Qxh5
-/+ (-1.48) Depth: 28/86 00:00:52 857MN
21...Nfd5
-/+ (-1.58 ++) Depth: 29/63 00:00:56 914MN
21...Nfd5
-+ (-1.68 ++) Depth: 29/63 00:00:56 915MN
21...Nfd5
-+ (-1.83 ++) Depth: 29/63 00:00:58 950MN
21...Nfd5 22.Nxd8 Qxh4 23.Nf3 Rxg2+ 24.Kxg2 Qg4+ 25.Kh2 Qxf3 26.Nf7 Qxf7 27.Rh1 Qg6 28.e4 Qh5+ 29.Kg1 Qg4+ 30.Kf1 Qf3 31.Bxd5 Nxd5 32.exd5 Qxh1+ 33.Ke2 Bg4+ 34.Kd2 Qf3 35.Qc4 Qxf2+ 36.Kc3 h5 37.a4 Bf3 38.a5 h4 39.a6 bxa6 40.b5 a5 41.Qc6 Qd4+ 42.Kc2 Qxd5 43.Qxd5 Bxd5 44.Re1 h3 45.Bxe5 Kb7 46.Bxd6 cxd6
-+ (-2.02) Depth: 29/63 00:01:02 1009MN
21...Nfd5 22.Nxd8
-+ (-1.92 --) Depth: 30/56 00:01:04 1039MN
21...Nfd5 22.Nxd8
-+ (-1.83 --) Depth: 30/76 00:01:06 1068MN
21...Nfd5 22.Nxd8
-+ (-1.68 --) Depth: 30/76 00:01:07 1096MN
21...Nfd5
-+ (-1.80 ++) Depth: 30/76 00:01:08 1100MN
21...Nfd5 22.Nxd8 Qxh4 23.Nf3 Rxg2+ 24.Kxg2 Qh3+ 25.Kg1 Qg4+ 26.Kh2 Qxf3 27.Nf7 Qxf7 28.Rh1 Qg6 29.e4 Qh5+ 30.Kg1 Qg4+ 31.Kf1 Qf3 32.Bxd5 Nxd5 33.exd5 Qxh1+ 34.Ke2 Bg4+ 35.Kd2 Qf3 36.Qc4 Qxf2+ 37.Kc3 h5 38.Rc2 Qe1+ 39.Rd2 Bf3 40.Kc2 a6 41.Bc3 e4 42.Kb2 e3 43.Rc2 Qg3 44.Qd4 Bd1 45.Rc1 e2 46.Qe4 b6 47.Qe8+ Ka7 48.d4 Qg5
-+ (-1.89) Depth: 30/76 00:01:10 1145MN
21...Nfd5
-+ (-1.99 ++) Depth: 31/76 00:01:19 1277MN
21...Nfd5 22.Nxd8 Qxh4 23.Nf3 Rxg2+ 24.Kxg2 Qg4+ 25.Kh2 Qxf3 26.Nf7 Qxf7 27.Rh1 Qg6 28.e4 Qh5+ 29.Kg1 Qg4+ 30.Kf1 Qf3 31.Bxd5 Nxd5 32.exd5 Qxh1+ 33.Ke2 Bg4+ 34.Kd2 Qf3 35.Qa4 a6 36.Kc2 h5 37.Bc3 h4 38.Kb2 h3 39.b5 axb5 40.Qxb5 h2 41.Bb4 h1Q 42.Rxh1 Qxh1 43.Bxd6 cxd6 44.Qb4 Qf3 45.Qxd6+ Kc8 46.Qxe5 Qxf2+ 47.Kc3 Qc5+ 48.Kb3 Bd1+ 49.Kb2 Qc2+ 50.Ka1 Qxd3 51.Qh8+ Kd7 52.Qg7+ Kd6 53.Qxb7 Qxa3+ 54.Kb1
-+ (-2.00) Depth: 31/76 00:01:37 1581MN
21...Nfd5 22.Nxd8
-+ (-1.91 --) Depth: 32/66 00:01:48 1755MN
21...Nfd5 22.Nxd8
-+ (-1.81 --) Depth: 32/66 00:02:05 2025MN
21...Nfd5
-+ (-1.91 ++) Depth: 32/88 00:02:15 2202MN
21...Nfd5 22.Nxd8
-+ (-1.66 --) Depth: 32/88 00:02:28 2407MN
21...Nfd5 22.Nxd8
-/+ (-1.39 --) Depth: 32/88 00:02:57 2904MN
21...Nfd5 22.Nxd8
-/+ (-1.03 --) Depth: 32/88 00:03:41 3635MN
21...Nfd5
-/+ (-1.33 ++) Depth: 32/88 00:03:42 3651MN
21...Nfd5 22.Nxd8 Qxh4 23.Nf3 Rxg2+ 24.Kxg2 Qh3+ 25.Kg1 Qg4+ 26.Kh2 Qxf3 27.Nf7 Qxf7 28.Rh1 Qg6 29.e4 Qh5+ 30.Kg1 Qg4+ 31.Kf1 Qf3 32.Bxd5 Nxd5 33.exd5 Qxh1+ 34.Ke2 Bg4+ 35.Kd2 Qf3 36.Qc4 a6 37.b5 a5 38.Kc3 Bf5 39.Rg1 h5 40.Rg8+ Ka7 41.Rh8 Qd1 42.Rh6 a4 43.f4 Bxd3 44.Qxd3 Qb3+ 45.Kd2 Qxb2+ 46.Ke3 exf4+ 47.Ke4 Kb6 48.Qd4+ Qxd4+ 49.Kxd4 Ka5 50.Ke4 f3 51.b6 Kxb6 52.Ke3 h4 53.Kxf3
-/+ (-1.32) Depth: 32/88 00:03:42 3652MN
21...Nfd5
-/+ (-1.42 ++) Depth: 33/76 00:03:52 3815MN
21...Nfd5
-/+ (-1.52 ++) Depth: 33/76 00:03:54 3848MN