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Subject: Re: How long does SKR take to find 28. ... c5

Author: Vincent Lejeune

Date: 04:08:13 04/25/04

Go up one level in this thread


On April 25, 2004 at 06:54:48, George Tsavdaris wrote:

>On April 25, 2004 at 00:36:58, Tom Brake wrote:
>
>>On April 24, 2004 at 16:15:51, John Merlino wrote:
>>>I suspect these moves might be easy to find for most any program (CM_SKR finds
>>>them all in less than one second). But it was fun to go through the game!
>>>
>>>jm
>>
>>This is the one move I can't get my machine to play.  It settles on Bf2, which
>>appears to be still winning, but refuses to seriously consider c5.
>>
>>If you don't mind could you tell me how long skr takes to switch to c5?
>
>On a slow PIV-1500 Mhz with low hash = 32 MiB it find it in 7:24 minutes.
>So on a top PC with 64 or more hash the time would be 3 minutes or below.
>
>4r1k1/5p2/2pB2p1/1r1n1bNp/3b3P/1B3P2/PPP1p1P1/1K2R2R b - - 0 28
>
>Time	Depth	Score	Positions	Moves
>0:02	1/7	-0.82	200373		28...Bd4-f2 29.Ng5-e4 Bf2xe1 30.Rh1xe1
>					Rb5xb3 31.c2xb3 Bf5xe4+ 32.f3xe4
>					Re8xe4 33.Kb1-c1
>0:03	1/8	-0.54	367321		28...Bd4-f2 29.Ng5-e4 Bf2xe1 30.Rh1xe1
>					Bf5xe4 31.Re1xe2 Re8-d8 32.f3xe4
>					Rd8xd6 33.e4xd5 c6xd5
>0:10	1/9	-0.93	1056527		28...Bd4-f2 29.Ng5-e4 Bf2xe1 30.Rh1xe1
>					Bf5xe4 31.f3xe4 Re8xe4 32.c2-c4
>					Rb5xb3 33.a2xb3 Nd5-e7 34.Kb1-c1
>					Ne7-f5
>0:24	1/10	-1.14	2662729		28...Bd4-f2 29.Ng5-e4 Bf2xe1 30.Rh1xe1
>					Bf5xe4 31.f3xe4 Re8xe4 32.c2-c4
>					Rb5xb3 33.a2xb3 Nd5-e7 34.Bd6xe7
>					Re4xe7 35.Kb1-c2 c6-c5 36.Kc2-d2
>0:52	1/11	-1.14	5950910		28...Bd4-f2 29.Ng5-e4 Bf2xe1 30.Rh1xe1
>					Bf5xe4 31.f3xe4 Re8xe4 32.c2-c4
>					Rb5xb3 33.a2xb3 Nd5-e7 34.Bd6xe7
>					Re4xe7 35.Kb1-c2 c6-c5 36.Kc2-d2
>1:47	1/12	-1.00	12700039	28...Bd4-f2 29.Ng5-e4 Bf2xe1 30.Rh1xe1
>					Bf5xe4 31.f3xe4 Re8xe4 32.c2-c4
>					Rb5xb3 33.a2xb3 Nd5-f6 34.Kb1-c2
>					Re4-e6 35.Bd6-b4 Nf6-d7 36.Bb4-c3
>					c6-c5
>4:25	2/13	-0.93	31498754	28...Bd4-f2 29.Ng5-e4 Bf2xe1 30.Rh1xe1
>					Bf5xe4 31.f3xe4 Nd5-f6 32.e4-e5
>					Nf6-e4 33.Kb1-c1 Ne4xd6 34.e5xd6
>					Re8-e4 35.d6-d7 Rb5-b8 36.c2-c4
>					Kg8-f8
>7:24	2/13	-1.00	51392520	28...c6-c5 29.Ng5-e4 c5-c4 30.Re1xe2
>					c4xb3 31.a2xb3 Rb5-a5 32.Rh1-d1
>					Re8-a8 33.Bd6-a3 Bd4-g7 34.g2-g3
>					Ra8-c8 35.Re2-d2


CM-SKR+ss=16, amd 2800+@12*180Mhz

Time	Depth	Score	Positions	Moves
0:23	1/11	-1.14	6387515		1...Bf2 2.Ne4 Bxe1 3.Rxe1 Bxe4
					4.fxe4 Rxe4 5.c4 Rxb3 6.axb3 Ne7
					7.Bxe7 Rxe7 8.Kc2 c5 9.Kd2
0:48	1/12	-1.00	13165008	1...Bf2 2.Ne4 Bxe1 3.Rxe1 Bxe4
					4.fxe4 Rxe4 5.c4 Rxb3 6.axb3 Nf6
					7.Kc2 Re6 8.Bb4 Nd7 9.Bc3 c5
1:52	1/13	-0.93	31980999	1...Bf2 2.Ne4 Bxe1 3.Rxe1 Bxe4
					4.fxe4 Nf6 5.e5 Ne4 6.Kc1 Nxd6
					7.exd6 Re4 8.d7 Rb8 9.c4 Kf8
3:04	1/13	-1.00	50750970	1...c5 2.Ne4 c4 3.Rxe2 cxb3 4.axb3
					Ra5 5.Rd1 Rea8 6.Ba3 Bg7 7.g3 Rc8
					8.Red2



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