Author: chandler yergin
Date: 08:03:58 05/23/05
Go up one level in this thread
On May 22, 2005 at 09:28:11, Rob Basham wrote:
>On May 22, 2005 at 00:22:17, John Merlino wrote:
>
>>On May 21, 2005 at 22:30:47, Vladimir Xern wrote:
>>
>>>According to SlowChess Blitz WV after a longer think, it's a mate in 9 beginning
>>>with Rxf6. Note that the following is on my 1.4 GHz Athlon. How long for The
>>>King to find the shorter mate?
>>>
>>>SlowChess Blitz WV (94 MB hash)
>>>FEN: r4k2/pp1q1p1p/5r1N/2pp2Q1/8/1P1PP3/P2P2P1/5RK1 w - -
>>>
>>>[16] M9 04:58.5 Rxf6 Ke8 Nf5 Qc7 Qg8+ Kd7 Qxf7+ Kc8 Ne7+ Kd8 Qg8+ Kd7 Qe6+
>>>Ke8 Nxd5+ Kd8 #mate1
>>>[15] M9 04:21.8 Rxf6 Ke8 Nf5 Qc7 Qg8+ Kd7 Qxf7+ Kc8 Ne7+ Kd8 Qg8+ Kd7 Qe6+
>>>Ke8 Nxd5+ Kd8 #mate1
>>>[15] M10 03:47.8 Rxf6 {++}
>>>[15] M10 01:19.7 Qxf6 Ke8 Qh8+ Ke7 Qe5+ Kf8 Rf5 Rc8 Qh8+ Ke7 Qf6+ Ke8 Re5+
>>>Qe6 Qxf7+ Kd8 Rxe6 a6 #mate1
>>>[14] M10 00:45.2 Qxf6 Ke8 Qh8+ Ke7 Qe5+ Kf8 Rf5 Rc8 Qh8+ Ke7 Qf6+ Ke8 Re5+
>>>Qe6 Qxf7+ Kd8 Rxe6 a6 #mate1
>>>[13] M10 00:24.2 Qxf6 Ke8 Qh8+ Ke7 Qe5+ Kf8 Rf5 Rc8 Qh8+ Ke7 Qf6+ Ke8 Re5+
>>>Qe6 Qxf7+ Kd8 Rxe6 a6 #mate1
>>>[12] M13 00:11.3 Qxf6 Ke8 Qh8+ Ke7 Qe5+ Kf8 Nf5 f6 Qxf6+ Qf7 Qh8+ Qg8 Nh6+
>>>Ke7 Nxg8+ Rxg8 Qxg8 c4 Qxd5 Ke8 Qe6+ Kd8 Rf8+ Kc7 Rc8+ #mate
>>>[11] M15 00:05.4 Qxf6 Ke8 Qh8+ Ke7 Qe5+ Kf8 Nf5 f6 Qxf6+ Qf7 Qh8+ Qg8 Nh6+
>>>Ke7 Nxg8+ Rxg8 Qxg8 c4 Qg7+ Kd6 Rf6+ Kc5 Qe7+ Kb5 a4+ Ka5 <tt>
>>>[10] 20.04 00:03.1 Qxf6 Ke8 Qh8+ Ke7 Qe5+ Kf8 Nf5 f6 Qxf6+ Qf7 Qh8+ Qg8 Nh6+
>>>Ke7 Nxg8+ Rxg8 Qxh7+ Rg7 Qxg7+ Kd6 Qxb7
>>>[9] 17.32 00:01.6 Qxf6 Ke8 Qh8+ Ke7 Rxf7+ Kd6 Qxa8 Qxf7 Nxf7+ Ke6 Nd8+ Ke5
>>>Nxb7 h5 Nxc5
>>>[8] 16.24 00:00.6 Qxf6 Ke8 Qh8+ Ke7 Rxf7+ Kd6 Qxa8 Qxf7 Nxf7+ Ke6 Qxb7 a6
>>>[7] 16.24 00:00.4 Qxf6 Ke8 Qh8+ Ke7 Rxf7+ Kd6 Qxa8 Qxf7 Nxf7+ Ke6 Qxb7
>>>[6] 13.76 00:00.0 Qxf6 Rc8 Nf5 Qxf5 Rxf5 Kg8 Qxf7+ Kh8 Qxd5
>>>[5] 13.76 00:00.0 Qxf6 Rc8 Nf5 Qxf5 Rxf5 Kg8 Qxf7+ Kh8 Qxd5
>>>[5] 10.12 00:00.0 Qxf6 {++}
>>>[5] 10.12 00:00.0 Rxf6 Qe8 Qf5 Kg7 Rxf7+ Qxf7 Nxf7
>>>[4] 8.92 00:00.0 Rxf6 Qe8 Rxf7+ Qxf7 Nxf7 Kxf7 Qxd5+ Kf6 Qxb7
>>>[3] 8.88 00:00.0 Rxf6 Re8 Rxf7+ Qxf7 Nxf7 Kxf7 Qxd5+ Kf6 Qxb7
>>>[3] 8.16 00:00.0 Qxf6 Qe8 Qh8+ Ke7 Qe5+ Kd8 Nxf7+ Kd7 Qxd5+ Kc7 Qxc5+ Kb8
>>>[2] 6.32 00:00.0 Qxf6 Ke8 Nxf7
>>
>>The King (CM9_R1) confirms the mate in 9 in just under two minutes on a P4-2.4:
>>
>>Time Depth Score Positions Moves
>>0:00 1/4 11.61 6906 1.Rxf6 Qe8 2.Rxf7+ Qxf7 3.Nxf7
>> Kxf7 4.Qxd5+ Kf6 5.Qxb7
>>0:00 1/4 13.66 10295 1.Qxf6 Rc8 2.Nf5 Qxf5 3.Rxf5
>>0:00 1/5 17.37 14908 1.Qxf6 Ke8 2.Qh8+ Ke7 3.Rxf7+ Kd6
>> 4.Rxd7+ Kxd7 5.Qxa8
>>0:00 1/6 18.77 62023 1.Qxf6 Ke8 2.Qh8+ Ke7 3.Rxf7+ Kd6
>> 4.Qxa8 Qxf7 5.Nxf7+ Kc6 6.Qxa7
>>0:00 1/7 19.21 85502 1.Qxf6 Ke8 2.Qh8+ Ke7 3.Rxf7+ Kd6
>> 4.Qxa8 Qxf7 5.Nxf7+ Ke6 6.Qxb7 a6
>>0:00 1/8 19.55 151793 1.Qxf6 Ke8 2.Qh8+ Ke7 3.Rxf7+ Kd6
>> 4.Qxa8 Qxf7 5.Nxf7+ Kc6 6.Qc8+
>> Kb6 7.Nd6 c4 8.dxc4
>>0:03 2/9 23.14 754704 1.Qxf6 Ke8 2.Qh8+ Ke7 3.Qe5+ Kf8
>> 4.Nf5 f6 5.Qxf6+ Qf7 6.Qh8+ Qg8
>> 7.Nh6+ Ke7 8.Nxg8+ Rxg8 9.Qxh7+
>> Kd8 10.Qxg8+ Kc7 11.Qxd5
>>0:06 2/10 23.14 1617047 1.Qxf6 Ke8 2.Qh8+ Ke7 3.Qe5+ Kf8
>> 4.Nf5 f6 5.Qxf6+ Qf7 6.Qh8+ Qg8
>> 7.Nh6+ Ke7 8.Nxg8+ Rxg8 9.Qxh7+
>> Kd8 10.Qxg8+ Kc7 11.Qxd5
>>0:18 2/11 Mate10 5437704 1.Qxf6 Ke8 2.Qh8+ Ke7 3.Qe5+ Kf8
>> 4.Rf5 a5 5.Qh8+ Ke7 6.Qf6+ Ke8
>> 7.Re5+ Qe6 8.Qxf7+ Kd8 9.Rxe6 Kc8
>> 10.Re8#
>>0:33 3/12 Mate10 10146584 1.Qxf6 Ke8 2.Qh8+ Ke7 3.Qe5+ Kf8
>> 4.Rf5 a5 5.Qh8+ Ke7 6.Qf6+ Ke8
>> 7.Re5+ Qe6 8.Qxf7+ Kd8 9.Rxe6 Kc8
>> 10.Re8#
>>1:10 3/13 Mate10 23068150 1.Qxf6 Ke8 2.Qh8+ Ke7 3.Qe5+ Kf8
>> 4.Rf5 a5 5.Qh8+ Ke7 6.Qf6+ Ke8
>> 7.Re5+ Qe6 8.Qxf7+ Kd8 9.Rxe6 Kc8
>> 10.Re8#
>>1:58 3/13 Mate09 38887301 1.Rxf6 Ke8 2.Nf5 Qd8 3.Qg8+ Kd7
>> 4.Qxf7+ Kc8 5.Nd6+ Qxd6 6.Rxd6
>> a6 7.Qd7+ Kb8 8.Rb6 Ka7 9.Qxb7#
>>
>>jm
>
>Thanks to all..
>
>Mate in 9...very good!
>
>So the best first mmove is....Rxf6....!
>
>Rob
Great engines! I tried this with Shredder8 several times,
it only found a Mate in 12.
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