Author: Dann Corbit
Date: 20:32:01 12/07/01
Go up one level in this thread
On December 07, 2001 at 23:00:35, Mike S. wrote:
>[D]8/8/8/7p/P5p1/5n1N/1P3k2/7K b - - 0 47
>
>Here, White just played Nxh3+. My program doesn't take the knight (gxh3) but
>plays Kf1??. I think it's broken.
>
>(solution tomorrow)
>
>If you ask, "what is the question?": That's part of the question. :o)
Taking the knight is a mate in 23 (via tablebase) despite both sides queening
white ( 1): setboard 8/8/8/7p/P5p1/5n1N/1P3k2/7K b - -
Stored 8 learned positions into hash table
black ( 1): go
usetime = 998.00, mintime = 998.00 maxtime = 998.00 tl 998.00 ml 0
1 0.023 3.39 1t 1...gxh3 {340}
6 0.023 3.39 1. 1...gxh3 {340}
10 0.024 2.87 2-- 1...gxh3 2.b4 {340}
14 0.024 2.87 2t 1...gxh3 2.b4 {340}
63 0.024 2.87 2. 1...gxh3 2.b4 {340}
89 0.024 2.95 3t 1...gxh3 2.b4 Ke3 {340}
175 0.025 2.95 3. 1...gxh3 2.b4 Ke3 {340}
228 0.025 2.96 4t 1...gxh3 2.b4 Ke3 3.a5 {340}
465 0.025 2.96 4. 1...gxh3 2.b4 Ke3 3.a5 {340}
747 0.026 3.01 5t 1...gxh3 2.b4 Ke3 3.a5 Kd4 {340}
1096 0.026 3.01 5. 1...gxh3 2.b4 Ke3 3.a5 Kd4 {340}
1751 0.028 2.86 6t 1...gxh3 2.b4 Ke3 3.a5 Kd4 4.b5 {340}
3414 0.030 2.86 6. 1...gxh3 2.b4 Ke3 3.a5 Kd4 4.b5 {340}
10475 0.094 2.50 7t 1...gxh3 2.a5 Nd4 3.a6 Nb5 4.Kh2 Nc7 {340}
18636 0.104 2.50 7. 1...gxh3 2.a5 Nd4 3.a6 Nb5 4.Kh2 Nc7 {340}
26987 0.113 2.10 8-- 1...gxh3 2.a5 Nd4 3.a6 Nc6 4.Kh2 Nb8 5.a7 Ke2
{340}
28383 0.116 1.70 8t 1...gxh3 2.a5 Nd4 3.a6 Nc6 4.Kh2 Na7 5.Kxh3
{260}
38841 0.128 1.70 8. 1...gxh3 2.a5 Nd4 3.a6 Nc6 4.Kh2 Na7 5.Kxh3
{260}
54222 0.212 1.82 9t 1...gxh3 2.a5 Ne5 3.a6 Nc6 4.Kh2H Ke3H 5.Kxh3H
Nd4H {260}
74997 0.254 1.82 9. 1...gxh3 2.a5 Ne5 3.a6 Nc6 4.Kh2 Ke3 5.Kxh3 Nd4
{260}
115990 0.429 2.29 10++ 1...gxh3 2.a5 Kg3 3.b4 Ne5 4.Kg1
121380 0.483 3.64 10++ 1...gxh3 2.a5 Kg3 3.a6 Ne5 4.Kg1 Ng4 5.a7 Nf2
6.a8=QH h2+H 7.Kf1H h1=Q+H 8.Qxh1H Nxh1H {340}
122413 0.491 3.64 10t 1...gxh3 2.a5 Kg3 3.a6H Ne5H 4.a7H Ng4H 5.a8=QH
Nf2+H 6.Kg1H h2+H 7.Kf1H {-581}
142488 0.534 3.64 10. 1...gxh3 2.a5 Kg3 3.a6 Ne5 4.a7 Ng4 5.a8=Q Nf2+
6.Kg1 h2+ 7.Kf1 {-581}
199023 1.269 3.64 11t 1...gxh3 2.a5 Kg3 3.a6 Ne5 4.a7 Ng4 5.a8=Q Nf2+
6.Kg1 h2+ 7.Kf1 h1=Q+ 8.Qxh1 Nxh1 {340}
238489 1.497 3.64 11. 1...gxh3 2.a5 Kg3 3.a6 Ne5 4.a7 Ng4 5.a8=Q Nf2+
6.Kg1 h2+ 7.Kf1 h1=Q+ 8.Qxh1 Nxh1 {340}
357490 1.784 3.64 12t 1...gxh3 2.a5 Kg3 3.a6 Ne5 4.a7 Ng4 5.a8=Q Nf2+
6.Kg1 h2+ 7.Kf1 h1=Q+ 8.Qxh1 Nxh1H {340}
442373 2.140 3.64 12. 1...gxh3 2.a5 Kg3 3.a6 Ne5 4.a7 Ng4 5.a8=Q Nf2+
6.Kg1 h2+ 7.Kf1 h1=Q+ 8.Qxh1 Nxh1 {340}
606391 3.431 3.64 13t 1...gxh3 2.a5 Kg3 3.a6 Ne5 4.a7 Ng4 5.a8=Q Nf2+
6.Kg1 h2+ 7.Kf1 h1=Q+ 8.Qxh1 Nxh1 {340}
817296 4.200 3.64 13. 1...gxh3 2.a5 Kg3 3.a6 Ne5 4.a7 Ng4 5.a8=Q Nf2+
6.Kg1 h2+ 7.Kf1 h1=Q+ 8.Qxh1 Nxh1 {340}
1073242 5.397 3.62 14t 1...gxh3 2.a5 Kg3 3.a6 Ne5 4.a7 Ng4 5.a8=Q Nf2+
6.Kg1 h2+ 7.Kf1 h1=Q+ 8.Qxh1 Nxh1 9.b4 h4 10.b5
h3 {340}
1815780 7.733 3.63 14t+ 1...Kf1 2.Nf4 g3 3.b4
1844420 7.844 4.04 14++ 1...Kf1 2.Ng1
1963600 8.148 5.04 14++ 1...Kf1 2.a5 g3 3.Nf4 Ne5 4.Ne2 g2+ 5.Kh2 Nf3+
6.Kg3 Nd4 7.Kf4 Nxe2+ 8.Ke4
2033796 8.325 10.04 14++ 1...Kf1 2.Nf4 h4 3.Ng2 g3 4.Ne3+ Ke2 5.Kg2 Ne1+
6.Kh3 Kxe3 7.a5 g2 8.b4 g1=Q 9.b5
2200597 8.749 10.53 14t 1...Kf1 2.Nf4 h4 3.Ng2 g3 4.Ne3+ Ke2 5.Kg2 Ne1+
6.Kh3 Kxe3 7.b4 g2 8.Kh2 h3 9.Kxh3 g1=QH {1181}
2200601 8.755 10.53 14. 1...Kf1 2.Nf4 h4 3.Ng2 g3 4.Ne3+ Ke2 5.Kg2 Ne1+
6.Kh3 Kxe3 7.b4 g2 8.Kh2 h3 9.Kxh3 g1=Q {1181}
2581697 9.745 10.57 15t 1...Kf1 2.Nf4 h4 3.Nd5 g3 4.Ne3+ Ke2 5.Kg2H
Ne1+H 6.Kh3H Kxe3H 7.b4H g2H 8.a5H g1=QH
9.Kxh4H {1181}
3648898 13.934 10.57 15. 1...Kf1 2.Nf4 h4 3.Nd5 g3 4.Ne3+ Ke2 5.Kg2 Ne1+
6.Kh3 Kxe3 7.b4 g2 8.a5 g1=Q 9.Kxh4 {1181}
3804637 14.334 10.97 16++ 1...Kf1 2.Nf4 h4 3.Nd5 g3 4.Ne3+ Ke2 5.Kg2 Ne1+
6.Kh3 Kxe3 7.Kxh4 g2 8.Kh5 g1=Q 9.Kh6 Nd3 10.Kh7
3826550 14.393 11.97 16++ 1...Kf1 2.Nf4 h4 3.Nd5 g3 4.Ne3+ Ke2 5.Kg2 Ne1+
6.Kh3 Kxe3 7.Kg4 g2 8.Kh3 g1=Q 9.Kxh4 Qh2+
10.Kg5H Qxb2H 11.a5H {1261}
4418962 16.053 12.01 16t 1...Kf1 2.Nf4 h4 3.Nd5 g3 4.Ne3+ Ke2 5.Kg2 Ne1+
6.Kh3 Kxe3 7.a5H Ke4H 8.a6H g2H 9.a7H g1=QH
10.a8=Q+H Kf4H 11.Qf8+H Ke4H {340}
4725577 17.205 12.02 16t+ 1...gxh3 2.a5 Kg3 3.b3 Ne5 4.Kg1
6204954 21.179 20.26 16++ 1...gxh3 2.a5 Kg3 3.a6 Nh2 4.a7 Ng4 5.Kg1 h2+
6.Kf1 h1=Q+ 7.Ke2 h4 8.b4 h3 9.b5 h2 10.b6 Qe4+
11.Kd2 h1=Q {2182}
6849489 22.677 Mat23 16t 1...gxh3 2.a5 Kg3 3.a6 Ne5 4.a7 Nd3 5.a8=Q Nf2+
6.Kg1 h2+ 7.Kf1 h1=Q+ 8.Qxh1 Nxh1 {EGTB} {340}
8805239 28.330 Mat23 16. 1...gxh3 2.a5 Kg3 3.a6 Ne5 4.a7 Nd3 5.a8=Q Nf2+
6.Kg1 h2+ 7.Kf1 h1=Q+ 8.Qxh1 Nxh1 {EGTB} {340}
10742106 33.092 Mat23 17t 1...gxh3 2.a5 Kg3 3.a6 Ne5 4.a7 Nd3 5.a8=Q Nf2+
6.Kg1 h2+ 7.Kf1 h1=Q+ 8.Qxh1 Nxh1 {EGTB} {340}
15636655 48.583 Mat23 17. 1...gxh3 2.a5 Kg3 3.a6 Ne5 4.a7 Nd3 5.a8=Q Nf2+
6.Kg1 h2+ 7.Kf1 h1=Q+ 8.Qxh1 Nxh1 {EGTB} {340}
19013727 55.807 Mat23 18t 1...gxh3 2.a5 Kg3 3.a6 Ne5 4.a7 Nd3 5.a8=Q Nf2+
6.Kg1 h2+ 7.Kf1 h1=Q+ 8.Qxh1 Nxh1 {EGTB} {340}
34737861 1:32.3 Mat23 18. 1...gxh3 2.a5 Kg3 3.a6 Ne5 4.a7 Nd3 5.a8=Q Nf2+
6.Kg1 h2+ 7.Kf1 h1=Q+ 8.Qxh1 Nxh1 {EGTB} {340}
35849404 1:36.4 Mat23 19t 1...gxh3 2.a5 Kg3 3.a6 Ne5 4.a7 Nd3 5.a8=Q Nf2+
6.Kg1 h2+ 7.Kf1 h1=Q+ 8.Qxh1 Nxh1 {EGTB} {340}
The king move (on the other hand) prevents the other side from queening, but
takes longer to win.
Pepito> setboard 8/8/8/7p/P5p1/5n1N/1P3k2/7K b - -
Pepito> go
5 323 88 925 g4xh3 b4 Kf2-e3 b5 Ke3-d4
5 323 89 1660 g4xh3 b4 Kf2-e3 b5 Ke3-d4
6 290 90 5389 g4xh3 ?? b4 Kf2-e3 b5 Ke3-d4
6 276 90 8191 g4xh3 a5 Nf3-e5 a6 Ne5-c4 a7 Nc4-b6
6 276 91 10249 g4xh3 a5 Nf3-e5 a6 Ne5-c4 a7 Nc4-b6
7 271 92 15126 g4xh3 a5 Nf3-e5 a6 Ne5-c6 Kh1-h2 Nc6-b4
7 271 93 20562 g4xh3 a5 Nf3-e5 a6 Ne5-c6 Kh1-h2 Nc6-b4
8 238 98 50445 g4xh3 ?? a5 Nf3-e5 a6 Ne5-c6 Kh1-h2 Nc6-b4
8 192 101 66427 g4xh3 a5 Nf3-e5 a6 Ne5-c6 Kh1-h2 Kf2-e3 Kh2xh3
8 192 106 96551 g4xh3 a5 Nf3-e5 a6 Ne5-c6 Kh1-h2 Kf2-e3 Kh2xh3
9 225 109 118114 g4xh3 !!
9 325 111 125851 g4xh3 !!
9 358 112 134975 g4xh3 a5 Kf2-g3 a6 Nf3-e1 a7 Ne1-d3 a8=Q Nd3-f2 Kh1-g1
h2 Kg1-f1 h1=Q Qa8xh1 Nf2xh1
9 358 112 136770 g4xh3 a5 Kf2-g3 a6 Nf3-e1 a7 Ne1-d3 a8=Q Nd3-f2 Kh1-g1
h2 Kg1-f1 h1=Q Qa8xh1 Nf2xh1
10 330 118 179160 g4xh3 a5 Kf2-g3 a6 Nf3-e1 a7 Ne1-d3 a8=Q Nd3-f2 Kh1-g1
h2 Kg1-f1 h1=Q Qa8xh1 Nf2xh1 b4
10 330 119 182641 g4xh3 a5 Kf2-g3 a6 Nf3-e1 a7 Ne1-d3 a8=Q Nd3-f2 Kh1-g1
h2 Kg1-f1 h1=Q Qa8xh1 Nf2xh1 b4
11 331 131 267347 g4xh3 a5 Kf2-g3 a6 Nf3-e1 a7 Ne1-d3 a8=Q Nd3-f2 Kh1-g1
h2 Kg1-f1 h1=Q Qa8xh1 Nf2xh1 b4 h4 b5
11 331 132 273484 g4xh3 a5 Kf2-g3 a6 Nf3-e1 a7 Ne1-d3 a8=Q Nd3-f2 Kh1-g1
h2 Kg1-f1 h1=Q Qa8xh1 Nf2xh1 b4 h4 b5
12 364 133 274482 g4xh3 !!
12 383 151 417628 g4xh3 a5 Kf2-g3 a6 Nf3-e1 a7 Ne1-d3 a8=Q Nd3-f2 Kh1-g1
h2 Kg1-f1 h1=Q Qa8xh1 Nf2xh1 Kf1-g1 Nh1-f2 b4 h4
12 383 154 431848 g4xh3 a5 Kf2-g3 a6 Nf3-e1 a7 Ne1-d3 a8=Q Nd3-f2 Kh1-g1
h2 Kg1-f1 h1=Q Qa8xh1 Nf2xh1 Kf1-g1 Nh1-f2 b4 h4
13 360 191 719610 g4xh3 a5 Kf2-g3 a6 Nf3-e1 a7 Ne1-d3 a8=Q Nd3-f2 Kh1-g1
h2 Kg1-f1 h1=Q Qa8xh1 Nf2xh1 Kf1-g1 Nh1-f2 b4 Nf2-h3 Kg1-f1 Nh3-f4
13 416 227 930696 Kf2-f1 !!
13 516 230 947300 Kf2-f1 !!
13 565 243 1023071 Kf2-f1 Nh3-f4 g3 Nf4-g2 h4 Ng2-e3 Kf1-e2 Kh1-g2 Nf3-e1
Kg2-h1 h3 Ne3-g2 Ne1xg2 Kh1-g1 Ng2-e3
13 565 245 1033843 Kf2-f1 Nh3-f4 g3 Nf4-g2 h4 Ng2-e3 Kf1-e2 Kh1-g2 Nf3-e1
Kg2-h1 h3 Ne3-g2 Ne1xg2 Kh1-g1 Ng2-e3
14 598 251 1065855 Kf2-f1 !!
14 698 255 1086971 Kf2-f1 !!
14 1076 299 1314316 Kf2-f1 Nh3-f4 g3 Nf4-g2 h4 Ng2-e3 Kf1-e2 Kh1-g2 Nf3-e1
Kg2-h3 Ke2xe3 Kh3xh4 g2 b4 Ke3-f2 b5 Ne1-f3 Kh4-g4
14 1076 354 1737434 Kf2-f1 Nh3-f4 g3 Nf4-g2 h4 Ng2-e3 Kf1-e2 Kh1-g2 Nf3-e1
Kg2-h3 Ke2xe3 Kh3xh4 g2 b4 Ke3-f2 b5 Ne1-f3 Kh4-g4
15 1109 378 1872028 Kf2-f1 !!
15 1130 396 1972993 Kf2-f1 Nh3-f4 g3 Nf4-g2 h4 Ng2-e3 Kf1-e2 Kh1-g2 Nf3-e1
Kg2-h3 Ke2xe3 Kh3xh4 g2 b3 Ne1-f3 Kh4-h3 g1=Q a5 Qg1-b1 a6 Qb1xb3
15 1139 475 2593058 g4xh3 a5 Kf2-g3 a6 Nf3-e1 a7 Ne1-d3 a8=Q Nd3-f2 Kh1-g1
h2 Kg1-f1 h1=Q Qa8xh1 Nf2xh1 b4 Kg3-h2 b5 h4 b6 Nh1-g3 Kf1-f2 h3
15 1139 510 2794169 g4xh3 a5 Kf2-g3 a6 Nf3-e1 a7 Ne1-d3 a8=Q Nd3-f2 Kh1-g1
h2 Kg1-f1 h1=Q Qa8xh1 Nf2xh1 b4 Kg3-h2 b5 h4 b6 Nh1-g3 Kf1-f2 h3
16 1166 786 4682277 Kf2-f1 Nh3-f4 g3 Nf4-g2 h4 Ng2-e3 Kf1-e2 Kh1-g2 Ke2xe3
b3 Nf3-e1 Kg2-h3 g2 Kh3xh4 g1=Q
16 1166 819 4900530 Kf2-f1 Nh3-f4 g3 Nf4-g2 h4 Ng2-e3 Kf1-e2 Kh1-g2 Ke2xe3
b3 Nf3-e1 Kg2-h3 g2 Kh3xh4 g1=Q
17 1170 1214 7126158 Kf2-f1 Nh3-f4 g3 Nf4-g2 h4 Ng2-e3 Kf1-e2 Kh1-g2 Ke2xe3
b3 Nf3-e1 Kg2-h3 g2 Kh3xh4 Ne1-f3 Kh4-h5 g1=Q Kh5-h6 Ke3-f4 b4 Qg1-b6 Kh6-g7
Qb6xb4
17 1170 1463 8979679 Kf2-f1 Nh3-f4 g3 Nf4-g2 h4 Ng2-e3 Kf1-e2 Kh1-g2 Ke2xe3
b3 Nf3-e1 Kg2-h3 g2 Kh3xh4 Ne1-f3 Kh4-h5 g1=Q Kh5-h6 Ke3-f4 b4 Qg1-b6 Kh6-g7
Qb6xb4
18 1203 1562 9550183 Kf2-f1 !!
18 1303 1715 10410818 Kf2-f1 !!
18 2138 5178 29976684 Kf2-f1 Nh3-f4 g3 Nf4-g2 h4 Ng2-e3 Kf1-e2 Kh1-g2 Ke2xe3
b4 Nf3-e1 Kg2-h3 g2 Kh3-g4 g1=Q Kg4-f5 h3 b5 h2 Kf5-f6 Qg1-g2 Kf6-e5 Qg2-e4
Ke5-d6 Qe4xa4
18 2138 5716 33577612 Kf2-f1 Nh3-f4 g3 Nf4-g2 h4 Ng2-e3 Kf1-e2 Kh1-g2 Ke2xe3
b4 Nf3-e1 Kg2-h3 g2 Kh3-g4 g1=Q Kg4-f5 h3 b5 h2 Kf5-f6 Qg1-g2 Kf6-e5 Qg2-e4
Ke5-d6 Qe4xa4
19 2171 6038 35376094 Kf2-f1 !!
19 2198 12234 72515110 Kf2-f1 Nh3-f4 g3 Nf4-g2 h4 Ng2-e3 Kf1-e2 Kh1-g2 Ke2xe3
Kg2-h3 Ke3-f2 Kh3-g4 g2 Kg4-f5 g1=Q Kf5-e6 Qg1-g4 Ke6-f6 Qg4xa4 Kf6-f5 Qa4-c2
Kf5-f4 Kf2-g2
19 2198 14206 84441737 Kf2-f1 Nh3-f4 g3 Nf4-g2 h4 Ng2-e3 Kf1-e2 Kh1-g2 Ke2xe3
Kg2-h3 Ke3-f2 Kh3-g4 g2 Kg4-f5 g1=Q Kf5-e6 Qg1-g4 Ke6-f6 Qg4xa4 Kf6-f5 Qa4-c2
Kf5-f4 Kf2-g2
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