Author: John Merlino
Date: 17:43:24 09/18/02
Go up one level in this thread
On September 18, 2002 at 16:59:21, Dieter Buerssner wrote:
>On September 17, 2002 at 22:57:26, Dann Corbit wrote:
>
>>Which engine finds the checkmate in this one:
>>r3nr1k/ppqbNpp1/7p/2p1p3/2B4Q/P4P2/1PP4P/2KR2R1 w - -
>>?
>>
>>Not just the key move -- the checkmate sequence.
>
>You already got two answers with small time. Yace needs much longer, but then
>comes up with a mate one move shorter:
>
> 817388866 1:00:40 14.55 12. 1. Rxg7 Qb6 2. Rg6 Qxg6 3. Nxg6+ Kg7 4. Nxf8
> Bf5 5. Qe7 h5 6. Rg1+ Bg4 7. fxg4 Kh6 {1271}
> 822949514 1:01:11 14.95 13++ 1. Rxg7 Qb6 2. Rg6 Qxg6 3. Nxg6+ Kg7 4. Nxf8
> Bf5 5. Qe7 Kh8 6. Qxf7 Be6 7. Nxe6 b6 8. Rd7
> Nd6 {1351}
> 827685275 1:01:37 15.95 13++ 1. Rxg7 Qb6 2. Rg6 Qxg6 3. Nxg6+ Kg7 4. Nxe5
> Nf6 5. Rg1+ Bg4 6. Rxg4+ Kh8 7. Qxf6+ Kh7 8.
> Nxf7 Rfd8 9. Nxd8 h5 {1771}
> 840501076 1:02:33 20.95 13++ 1. Rxg7 Qb6 2. Rg6 Rg8 3. Rxb6 Nf6 4. Rxf6 Bf5
> 5. Nxf5 Rg7 6. Nxg7 Kh7
>1078767385 1:16:27 Mat10 13t 1. Rxg7 Qb6 2. Rg6 Qxg6 3. Nxg6+ Kg7 4. Rg1 Nf6
> 5. Nxe5+ Bg4 6. Rxg4+ Nxg4 7. Nxg4 h5 8. Qxh5
> Kg8 {HT} {771}
>
>The part of the solution hidden in the HT is: 9. Qh6 Rad8 10. Nf6#
>
>So, this seems to be a problem, solvable by Chest in reasonable time.
>
>Regards,
>Dieter
If I had let CM9000 go a little bit longer:
Time Depth Score Positions Moves
0:00 1/3 -0.72 1749 1.Nd5 Qd8 2.Qe4
0:00 1/3 -0.42 3350 1.Rg6 Kh7 2.Nd5
0:00 1/4 -0.13 6624 1.Rg6 Kh7 2.Nd5 Qd8
0:00 1/5 -0.33 56780 1.Rg6 Kh7 2.Rg2 Nd6 3.Qg3 g6 4.Qxe5
0:01 1/5 -0.09 85398 1.Bxf7 Bf5 2.Nxf5 Qxf7 3.Nxh6 Qf4+
4.Qxf4 Rxf4
0:02 1/6 0.57 142695 1.Bxf7 Bf5 2.Nxf5 Rxf7 3.Nxh6 Rxf3
4.Nf5+ Kg8
0:02 1/6 5.82 215974 1.Rxg7 Kxg7 2.Rg1+ Kh7 3.Bd3+ e4
4.Bxe4+ f5 5.Rg6 Qf4+ 6.Qxf4
0:06 1/7 13.70 560036 1.Rxg7 Qb6 2.Rg6 Qxg6 3.Nxg6+ Kg7
4.Nxf8 Bb5 5.Bxb5 Nc7 6.Qe7 Rxf8
7.Qxc7
0:11 1/8 15.33 1183094 1.Rxg7 Qb6 2.Rg6 Qxg6 3.Nxg6+ Kg7
4.Nxf8 Nf6 5.Nxd7 Nh7 6.Qe7 Ng5
7.Qf6+ Kg8 8.Nxe5
0:29 1/9 17.55 3165238 1.Rxg7 Qb6 2.Rg6 Qxg6 3.Nxg6+ Kg7
4.Nxf8 Nf6 5.Nxd7 Nh7 6.Rg1+ Kh8
7.Nxe5 Rf8 8.Nxf7+ Rxf7 9.Bxf7
1:09 1/10 Mate11 7968913 1.Rxg7 Qb6 2.Rg6 Qxg6 3.Nxg6+ Kg7
4.Rg1 Bg4 5.Nxe5 Rd8 6.Qxg4+ Kf6
7.Nxf7 Rd1+ 8.Kxd1 Ng7 9.Qg6+ Ke7
10.Qd6+ Ke8 11.Qd8#
2:45 2/11 Mate10 19940305 1.Rxg7 Qb6 2.Rg6 Qxg6 3.Nxg6+ Kg7
4.Rg1 Bg4 5.Nxe5 Nf6 6.Nxg4 Nxg4
7.Qxg4+ Kf6 8.Qf4+ Ke7 9.Rd1 f5
10.Qe5#
jm
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