After the good moves : 1. Rxb4 Qxb4 2. Nd6+ Kd8 3. Nf7+ Kc8 4. Nxh8 e5 5. f7 Qc5+ 6. Kh1 Kc7 7. Ng6Dann Corbit wrote: ↑Sun Apr 25, 2021 1:49 am I was intrigued enough to give a stronger try, but I think it will be very hard to drive to mate:Code: Select all
FEN: r1k4r/1p1b4/p3pP1p/q7/1b2N3/6Q1/P1P3PP/1R1R2K1 w - - 0 1 ShashChess16-x86-64-avx2: Found 746 tablebases NNUE evaluation using nn-62ef826d1a6d.nnue enabled ... 45/75 1:05:33 294,676,841k 74,924k +48.93 Rxb4 Qxb4 Nd6+ Kd8 Nf7+ Kc8 Nxh8 Qc5+ Kh1 Qxc2 Qd6 Qc7 Qf8+ Qd8 Qg7 Kb8 Rxd7 Qb6 h3 Ka7 f7 Rc8 Kh2 Qb5 Qd4+ Qb6 Qxb6+ Kxb6 Ng6 Ra8 Re7 Kc5 Kh1 Kd4 Rxe6 Rc8 Kh2 Kc4 Ne5+ Kb5 Nd7 Rd8 Re5+ Kc6 f8Q Rxf8 Nxf8 Kd6 Re8 h5 Re6+ Kc7 Rh6 h4 Rxh4 b5 Rh6 a5 Rh5 Kc6 Nd7 b4 Rc5+ Kxd7 46/8- 1:05:33 294,677,592k 74,924k +48.42 Rxb4 Qxb4 46/8- 1:05:33 294,685,379k 74,924k +48.34 Rxb4 Qxb4 46/66- 1:06:03 296,988,374k 74,937k +45.71 Rxb4 Qxb4 46/66+ 1:06:24 298,598,848k 74,946k +46.20 Rxb4 46/66+ 1:06:30 299,055,312k 74,948k +47.12 Rxb4 46/70- 1:06:39 299,781,472k 74,950k +44.92 Rxb4 Qxb4 46/70- 1:06:46 300,286,564k 74,952k +39.12 Rxb4 Qxb4 46/70+ 1:06:48 300,447,905k 74,953k +41.19 Rxb4 46/70+ 1:08:03 306,195,658k 74,985k +49.74 Rxb4 46/73 1:09:13 311,631,370k 75,035k +51.00 Rxb4 Qxb4 Nd6+ Kd8 Nf7+ Kc8 Nxh8 e5 f7 Kb8 Qe3 Bc6 Rd8+ Kc7 Rxa8 Qb1+ Kf2 Qxc2+ Qe2 Qc5+ Kg3 Qa3+ Kg4 Qa4+ Kh5 Qf4 h4 Qf5+ Kxh6 Qf6+ Kh7 Qe7 Kg7 Bd5 Qc2+ Kb6 Qb2+ Kc7 Qc3+ Kb6 Re8 Qd7 Qb4+ Kc6 Re7 Qd6 Qc3+ Kb5 Rxe5 a5 Rxd5+ Qxd5 Qb2+ Kc4 f8Q Qd4+ Qxd4+ Kxd4 Ng6 Kd3 h5 Kc3 Qc5+ Kd3 Qd5+ Ke2 Qf3+ Kd2 Qa3 47/38- 1:09:15 311,804,776k 75,036k +50.80 Rxb4 Qxb4 47/38- 1:09:15 311,805,077k 75,036k +49.98 Rxb4 Qxb4 47/65- 1:10:15 316,432,534k 75,060k +43.31 Rxb4 Qxb4 47/65+ 1:10:16 316,496,859k 75,061k +44.56 Rxb4 47/77+ 1:10:50 319,102,625k 75,076k +49.97 Rxb4 47/77 1:11:04 320,196,020k 75,083k +50.37 Rxb4 Qxb4 Nd6+ Kd8 Nf7+ Kc8 Nxh8 Qc5+ Kh1 Qxc2 Qd6 Qc7 Qf8+ Qd8 Qg7 Kb8 Rxd7 Qb6 h3 Ka7 f7 h5 Ng6 Rc8 Kh2 Qb5 Qd4+ Qb6 Qxb6+ Kxb6 Re7 Kb5 Rxe6 a5 Re5+ Kb4 f8Q+ Rxf8 Nxf8 h4 Re4+ Ka3 Rxh4 a4 Rh5 Kb4 Rh6 b5 Ra6 Ka3 Rb6 Kb4 a3+ Kc4 Ne6 Kd5 Rxb5+ Kd6 48/60- 1:11:04 320,198,351k 75,083k +50.25 Rxb4 Qxb4 48/60- 1:11:04 320,198,439k 75,083k +49.38 Rxb4 Qxb4 48/60- 1:11:15 321,022,090k 75,084k +49.28 Rxb4 Bc6 48/60- 1:11:17 321,156,913k 75,084k +49.09 Rxb4 Qxb4 48/60+ 1:11:19 321,314,573k 75,085k +49.46 Rxb4 48/62- 1:11:30 322,149,709k 75,089k +48.76 Rxb4 Qxb4 48/62+ 1:11:31 322,247,737k 75,090k +49.32 Rxb4 48/62- 1:11:32 322,316,602k 75,090k +48.27 Rxb4 Qxb4 48/62- 1:11:32 322,347,494k 75,090k +47.55 Rxb4 Qxb4 48/62+ 1:11:33 322,374,627k 75,090k +48.33 Rxb4 48/62- 1:11:33 322,408,338k 75,090k +46.62 Rxb4 Qxb4 48/62- 1:11:35 322,542,450k 75,091k +45.12 Rxb4 Qxb4 48/62+ 1:11:40 322,950,438k 75,093k +46.59 Rxb4 48/72+ 1:13:11 329,925,894k 75,136k +52.00 Rxb4 48/72 1:13:42 332,379,896k 75,155k +52.00 Rxb4 Qxb4 Nd6+ Kd8 Nf7+ Kc8 Nxh8 Qc5+ Kh1 Qxc2 Qd6 Qc7 Qf8+ Qd8 Qg7 Kb8 Rxd7 Qb6 h3 Ka7 f7 Qb4 Ng6 Qb5 Qd4+ Qb6 Qxb6+ Kxb6 Re7 Kb5 Rxe6 Ka4 Kh2 Ka5 Re5+ Kb4 f8Q+ Rxf8 Nxf8 Kc3 Rh5 b5 Nd7 b4 Rxh6 a5 Ra6 Kd2 Nf8 Ke3 Rxa5 Kf4 Ne6+ Ke3 g4 49/69- 1:14:08 334,401,022k 75,166k +51.89 Rxb4 Qxb4 49/69- 1:14:33 336,267,177k 75,176k +51.62 Rxb4 Qxb4 49/69- 1:15:10 339,147,906k 75,189k +47.70 Rxb4 Qxb4 49/69+ 1:15:21 339,976,372k 75,191k +48.58 Rxb4 49/69+ 1:15:38 341,291,358k 75,201k +51.98 Rxb4 49/69 1:16:03 343,264,210k 75,215k +53.39 Rxb4 Qxb4 Nd6+ Kd8 Nf7+ Kc8 Nxh8 e5 f7 Qc5+ Kh1 Kc7 Qg7 Rd8 Ng6 Kc8 f8R Rxf8 Nxf8 Bh3 gxh3 Qc6+ Qg2 Kc7 Qxc6+ Kxc6 Nd7 e4 Kg2 Kb5 Rd4 e3 Kf3 e2 Kxe2 a5 Ke3 a4 Kf3 Kc6 Ke4 b5 Rd1 h5 Ne5+ Kb6 Rd7 Kc5 Rd4 Kb6 Rd5 h4 Rd4 50/12- 1:16:05 343,390,519k 75,216k +52.60 Rxb4 Qxb4 50/12- 1:16:08 343,610,442k 75,217k +52.48 Rxb4 Qxb4 50/64- 1:16:12 343,979,602k 75,220k +49.78 Rxb4 Qxb4 50/64+ 1:16:27 345,078,417k 75,229k +50.38 Rxb4 50/64+ 1:16:29 345,265,335k 75,230k +51.57 Rxb4 50/64- 1:16:29 345,276,185k 75,230k +48.76 Rxb4 Qxb4 50/64- 1:16:32 345,525,097k 75,231k +46.86 Rxb4 Qxb4 50/64+ 1:16:40 346,113,751k 75,234k +48.91 Rxb4 50/64+ 1:16:44 346,430,877k 75,236k +51.92 Rxb4 50/68- 1:19:30 359,163,916k 75,294k +44.47 Rxb4 Qxb4 50/68- 1:19:45 360,305,608k 75,295k +39.71 Rxb4 Qxb4 50/68+ 1:21:32 368,518,641k 75,316k +44.89 Rxb4 50/68+ 1:24:01 380,166,318k 75,402k +52.38 Rxb4 50/78 1:27:09 394,978,536k 75,525k +55.78 Rxb4 Qxb4 Nd6+ Kd8 Nf7+ Kc8 Nxh8 Qc5+ Kh1 Bc6 Nf7 e5 Rd8+ Kc7 Rxa8 Qxc2 Qxe5+ Kb6 Qd4+ Ka5 Rg8 Qb1+ Qg1 Qxa2 Nxh6 Qb2 Rg3 Qb4 Rg5+ b5 f7 Qe7 Re5 Qd8 Qe1+ Kb6 Qe3+ Ka5 Qc3+ Ka4 Qa1+ Kb4 Rg5 Ba8 Rg4+ Kc5 Qc3+ Kb6 Rg6+ Kb7 Qc6+ Kb8 Rg8 Bxc6 Rxd8+ Kc7 Rc8+ Kxc8 f8Q+ Kb7 Qe7+ Ka8 Qd6 51/12- 1:27:09 394,979,311k 75,525k +54.90 Rxb4 Qxb4 51/64- 1:27:09 394,985,270k 75,525k +54.42 Rxb4 Qxb4 51/66- 1:27:19 395,725,440k 75,528k +51.50 Rxb4 Qxb4 51/66+ 1:27:22 395,998,071k 75,529k +52.11 Rxb4 51/66- 1:27:23 396,065,158k 75,529k +50.57 Rxb4 Qxb4 51/66+ 1:27:24 396,099,414k 75,530k +51.93 Rxb4 51/70+ 1:27:25 396,171,281k 75,530k +53.83 Rxb4 51/70- 1:27:25 396,207,573k 75,531k +49.07 Rxb4 Qxb4 51/73+ 1:27:28 396,433,295k 75,532k +52.64 Rxb4 51/73- 1:27:34 396,885,520k 75,536k +46.05 Rxb4 Qxb4 51/73+ 1:27:45 397,746,487k 75,543k +51.24 Rxb4 51/73+ 1:31:04 413,426,162k 75,653k +57.21 Rxb4 51/73 1:34:12 428,275,251k 75,770k +57.74 Rxb4 Qxb4 Nd6+ Kd8 Nf7+ Kc8 Nxh8 e5 f7 Qc5+ Kh1 Kb8 Ng6 Ka7 Rxd7 Rc8 Qf3 e4 Qxe4 Qb5 Qd4+ Kb8 Qd6+ Ka7 h3 Qf1+ Kh2 Qf2 Qd4+ Qxd4 Rxd4 Rb8 Kg1 Kb6 Rd7 Kb5 Kf1 b6 f8Q Rxf8+ Nxf8 Kc4 Rh7 h5 Rxh5 a5 Rh6 b5 Kg1 Kc3 Rh5 Kd2 Kh2 a4 Kg1 Kd1 Rd5+ Kxc2 Rxb5 52/63- 1:34:16 428,590,269k 75,771k +57.65 Rxb4 Qxb4 52/64- 1:34:17 428,671,106k 75,772k +57.12 Rxb4 Qxb4 52/64+ 1:34:34 429,993,632k 75,778k +57.65 Rxb4 52/64- 1:34:36 430,119,577k 75,778k +56.99 Rxb4 Qxb4 52/64- 1:34:41 430,578,893k 75,780k +56.73 Rxb4 Qxb4 52/64+ 1:34:42 430,634,596k 75,780k +57.07 Rxb4 52/64+ 1:37:18 442,700,259k 75,827k +58.79 Rxb4 52/64- 1:37:20 442,835,980k 75,828k +56.40 Rxb4 Qxb4 52/64- 1:37:50 445,162,497k 75,832k +51.80 Rxb4 Qxb4 52/64+ 1:37:55 445,521,269k 75,833k +53.49 Rxb4 52/64- 1:38:04 446,239,188k 75,834k +49.41 Rxb4 Qxb4 52/64+ 1:38:06 446,406,355k 75,835k +52.95 Rxb4 52/64+ 1:38:13 446,947,790k 75,837k +57.71 Rxb4 52/76 1:47:28 490,703,842k 76,090k +59.64 Rxb4 Qxb4 Nd6+ Kd8 Nf7+ Kc8 Nxh8 Qc5+ Kh1 Bc6 Nf7 e5 Rd8+ Kc7 Rxa8 Qxc2 Qxe5+ Kb6 Qd4+ Ka5 Rg8 Qxa2 Nxh6 Qb1+ Qg1 Qb4 Rg4 Qc3 Rg3 Qe5 Qc1 Kb6 Qe3+ Qxe3 Rxe3 Bd5 Ra3 Kb5 Kg1 Kb6 Kf2 Kc5 Rc3+ Kb4 Rg3 Ba2 Rg5 a5 Rg7 Kc3 Rxb7 Bd5 Ra7 Kb2 Rxa5 Be4 f7 Bb1 Kg1 53/56- 1:47:30 490,802,755k 76,091k +59.49 Rxb4 Qxb4 53/56- 1:47:30 490,802,837k 76,091k +59.32 Rxb4 Qxb4 53/61- 1:47:30 490,867,425k 76,092k +56.96 Rxb4 Qxb4 53/64+ 1:47:31 490,940,160k 76,093k +57.62 Rxb4 53/68- 1:47:32 491,032,458k 76,094k +56.34 Rxb4 Qxb4 53/68- 1:47:33 491,077,415k 76,094k +51.69 Rxb4 Qxb4 53/68+ 1:47:33 491,101,961k 76,094k +53.33 Rxb4 53/68+ 1:47:47 492,187,576k 76,106k +60.13 Rxb4 53/76 1:50:16 504,190,475k 76,202k +61.34 Rxb4 Qxb4 Nd6+ Kd8 Nf7+ Kc8 Nxh8 Qc5+ Kh1 Qxc2 Qd6 Qc7 Qf8+ Qd8 Qg7 Kb8 Rxd7 Qb6 h3 Ka7 f7 Rc8 Kh2 Kb8 Ng6 Ka7 Qe5 Qc6 Qd4+ Kb8 Ne5 Qd5 Qf4 Ka7 Qf2+ Qc5 Qxc5+ Rxc5 Re7 Rc8 Nd7 e5 Re6 Rd8 Rxe5 b5 f8Q Rxf8 Nxf8 Kb7 Re6 h5 Rh6 h4 Rxh4 Kb8 Rh5 Ka8 54/61- 1:50:17 504,267,866k 76,203k +61.13 Rxb4 Qxb4 54/61- 1:50:18 504,315,486k 76,203k +61.04 Rxb4 Qxb4 54/61- 1:50:19 504,427,866k 76,203k +60.14 Rxb4 Qxb4 54/61+ 1:50:24 504,823,469k 76,206k +60.41 Rxb4 54/62- 1:50:29 505,221,253k 76,209k +59.70 Rxb4 Qxb4 54/68- 1:50:36 505,759,539k 76,212k +56.86 Rxb4 Qxb4 54/68+ 1:50:36 505,780,834k 76,212k +57.85 Rxb4 54/76+ 1:50:38 505,914,432k 76,213k +59.75 Rxb4 54/76- 1:51:00 507,677,555k 76,225k +55.32 Rxb4 Qxb4 54/76+ 1:51:55 512,007,333k 76,244k +58.75 Rxb4 54/76+ 1:56:36 534,532,361k 76,403k +62.54 Rxb4 54/76 2:06:13 580,592,990k 76,659k +64.88 Rxb4 Qxb4 Nd6+ Kd8 Nf7+ Kc8 Nxh8 Qc5+ Kh1 Qxc2 Qd6 Qc7 Qf8+ Qd8 Qg7 Kb8 Rxd7 Qb6 h3 Ka7 f7 Rc8 Kh2 Ra8 Ng6 Qb4 Qe5 Qb5 Qd6 Qb6 Qxb6+ Kxb6 Kh1 Kc5 Re7 Rc8 Rxe6 Kd4 Re8 Rc1+ Kh2 Rf1 f8Q Rxf8 Nxf8 a5 Re6 h5 Rh6 a4 Nd7 Kd3 Rxh5 Ke2 Ra5 Kd2 Rb5 Kc2 Rxb7 55/54+ 2:06:25 581,530,048k 76,666k +64.96 Rxb4 55/54+ 2:06:26 581,645,997k 76,666k +65.04 Rxb4 55/70+ 2:06:54 583,839,777k 76,678k +65.35 Rxb4 55/70- 2:07:03 584,622,534k 76,684k +64.79 Rxb4 Bc6 55/70- 2:07:06 584,881,768k 76,686k +64.39 Rxb4 Qxb4 55/70- 2:07:07 584,940,551k 76,687k +60.94 Rxb4 Qxb4 55/70+ 2:07:09 585,068,171k 76,687k +61.82 Rxb4 55/72+ 2:07:14 585,498,135k 76,690k +65.22 Rxb4 55/74 2:11:08 604,257,423k 76,797k +65.98 Rxb4 Qxb4 Nd6+ Kd8 Nf7+ Kc8 Nxh8 Qc5+ Kh1 Qxc2 Qd6 Qc7 Qf8+ Qd8 Qg7 Kb8 Rxd7 Qb6 h3 Ka7 f7 Rc8 Kh2 Qb5 Qd4+ Qb6 Qxb6+ Kxb6 Ng6 Ra8 Kh1 Rb8 Re7 h5 Rxe6+ Kc7 Kh2 Rd8 Re7+ Kb6 Re8 Rd2 Re6+ Kb5 Re5+ Kc6 Nf4 b5 Re7 Rd8 Re8 b4 Rxd8 Kb7 Rb8+ Kc6 Rc8+ Kb6 Nd5+ Kb5 Rc5+ Kxc5 f8Q+ Kc4 Qxb4+ Kxd5 Qb7+ Kd4 56/61- 2:11:13 604,685,451k 76,799k +65.88 Rxb4 Qxb4 56/61- 2:11:13 604,685,530k 76,799k +65.67 Rxb4 Qxb4 56/61- 2:11:19 605,155,964k 76,802k +61.50 Rxb4 Qxb4 56/61+ 2:11:24 605,555,136k 76,804k +62.28 Rxb4 56/70+ 2:11:40 606,853,130k 76,810k +63.78 Rxb4 56/70- 2:11:41 606,889,798k 76,810k +60.32 Rxb4 Qxb4 56/70+ 2:11:43 607,071,886k 76,811k +63.00 Rxb4 56/70+ 2:12:26 610,463,782k 76,825k +66.01 Rxb4 56/70- 2:12:33 611,080,737k 76,827k +57.92 Rxb4 Qxb4 56/70+ 2:12:36 611,253,198k 76,828k +63.86 Rxb4
The 4 best moves lead to mate :
Code: Select all
51/39 01:45 5.406.978k 51.486k +M19 7. ... Bb5 8.Nxe5 Kb6 9.a4 Bc6 10.Rb1+ Kc7 11.Nxc6+ Kxc6 12.Qf3+ Qd5 13.Qf6+ Kc7 14.Qe7+ Kc6 15.a5 b5 16.axb6 Qd8 17.b7 Rb8 18.Qxd8 Rxd8 19.b8Q Rxb8 20.Rxb8 Kd5 21.f8Q h5 22.Qf7+ Kd4 23.Rd8+ Kc5 24.Qb7 h4 25.Rd5+ Kc4 26.Qb3+
51/39 01:45 5.406.978k 51.486k +M19 7. ... Be6 8.Nxe5 Kb6 9.Nd3 Qc6 10.Qe3+ Kc7 11.Nb4 Qd6 12.Rxd6 Kxd6 13.Qb6+ Ke7 14.Qxb7+ Kd6 15.Qxa8 Bxf7 16.Qxa6+ Ke7 17.c4 Be6 18.Nd5+ Kf7 19.Qd6 Bxd5 20.cxd5 h5 21.Qe6+ Kg7 22.d6 h4 23.d7 h3 24.d8Q hxg2+ 25.Kxg2 Kh7 26.Qdg8+
51/39 01:45 5.406.978k 51.486k +M19 7. ... Bf5 8.Nxe5 Kb6 9.Rb1+ Ka7 10.Qf3 Rb8 11.Qxf5 Ka8 12.Rd1 Rf8 13.Qf6 Qb4 14.Rd8+ Rxd8 15.Qxd8+ Ka7 16.Qd1 Kb6 17.Nd7+ Kc7 18.f8Q Qxf8 19.Nxf8 Kc6 20.Qd7+ Kc5 21.Ne6+ Kb4 22.Qd3 h5 23.a3+ Ka5 24.Qc3+ Kb5 25.Qc5+ Ka4 26.Qb4+
51/45 01:45 5.406.978k 51.486k +M22 7. ... Bc6 8.Nxe5 Bxg2+ 9.Qxg2 Qxe5 10.Rb1 Kd6 11.Qg6+ Kd5 12.c4+ Kxc4 13.Qc2+ Kd5 14.Qb3+ Kd6 15.Qb6+ Ke7 16.Qxb7+ Ke6 17.Qc6+ Kxf7 18.Rb7+ Qe7 19.Qf3+ Ke8 20.Qh5+ Kf8 21.Qxh6+ Ke8 22.Qh8+ Kf7 23.Qh7+ Ke6 24.Qxe7+ Kf5 25.Qc5+ Kf6 26.Rb6+ Kf7 27.Qc7+ Ke8 28.Rb7 a5 29.Qe7+