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Subject: Re: Larsen-Spassky 1970, 12..h4! -> CM10 : 33 sec

Author: Vincent Lejeune

Date: 16:14:35 09/02/04

Go up one level in this thread


On September 02, 2004 at 03:43:50, Vincent Lejeune wrote:

>On September 01, 2004 at 19:53:53, stuart taylor wrote:
>>
>>I would be very interested in the "more later", if possible. Maybe the computers
>>which get h4 quick sometimes change their mind, and then come back again to h4
>>with much more certainty. I've seen that happen from this position.
>
>I'll let Chessmaster think on it next night (reponse in 24 from now)
>I'm reposting all the test positions, with comments :
>
>find h4! and don't lose it after 15 min
>[d]2kr3r/ppp1qpp1/2p5/2b2b1p/2P1pPn1/1P2P1PP/PBQPB3/RN2K2R b KQ - 0 12

CM10 (amd@3000+) doesn't lose it after 25 min :

Time	Depth	Score	Positions	Moves
0:32	1/11	-0.92	8541987		1...h4 2.Bxg4 Bxg4 3.hxg4 hxg3
					4.Rg1 Rh2 5.Qc3 Qh4 6.Qxg7 Rh1
					7.Rxh1 Qxh1+ 8.Ke2 Bxe3
1:19	1/12	-1.75	20461179	1...h4 2.Bxg4 Bxg4 3.hxg4 hxg3
					4.Rg1 Rh2 5.Nc3 Bxe3 6.O-O-O Bxg1
					7.Rxg1 Rdxd2 8.Qxd2 Rxd2 9.Kxd2
					Qd6+ 10.Kc2 Qxf4
2:38	1/13	-1.72	42207857	1...h4 2.Bxg4 Bxg4 3.hxg4 hxg3
					4.Rg1 Rh2 5.Nc3 Rdxd2 6.Qxd2 Rxd2
					7.Kxd2 Qd8+ 8.Ke1 Bxe3 9.Rg2 Bf2+
					10.Kf1 Qd2 11.Rd1 Qxb2 12.Nxe4
					Qxa2 13.Nxf2 gxf2
6:38	2/14	-1.72	109858966	1...h4 2.Bxg4 Bxg4 3.hxg4 hxg3
					4.Rg1 Rh2 5.Nc3 Rdxd2 6.Qxd2 Rxd2
					7.Kxd2 Qd8+ 8.Ke1 Bxe3 9.Rg2 Bf2+
					10.Kf1 Qd2 11.Rd1 Qxb2 12.Nxe4
					Qxa2 13.Nxf2 gxf2
15:56	2/15	-1.72	271571404	1...h4 2.Bxg4 Bxg4 3.hxg4 hxg3
					4.Rg1 Rh2 5.Nc3 Rdxd2 6.Qxd2 Rxd2
					7.Kxd2 Qd8+ 8.Ke1 Bxe3 9.Rg2 Bf2+
					10.Kf1 Qd2 11.Rd1 Qxb2 12.Nxe4
					Qxa2 13.Nxf2 gxf2

>
>>
>>It might even be that there is stronger variation against 13.Bxg4, and best
>>would be 13.Rg1.
>
>what's the best move here (after 12...h4) ?
>[d]2kr3r/ppp1qpp1/2p5/2b2b2/2P1pPnp/1P2P1PP/PBQPB3/RN2K2R w KQ - 0 13

Chessmaster10 (amd@3000+), 3 best moves after 10 min Bxg4 still the best :

Time	Depth	Score	Positions	Moves
7:35	1/13	-1.72	112167844	13.Bxg4 Bxg4 14.hxg4 hxg3 15.Rg1
					Rh2 16.Nc3 Rdxd2 17.Qxd2 Rxd2 18.Kxd2
					Qd8+ 19.Ke1 Bxe3 20.Rg2 Bf2+ 21.Kf1
					Qd2 22.Rd1 Qxb2 23.Nxe4 Qxa2 24.Nxf2
					gxf2
8:42	1/13	-3.29	129944264	13.Rg1 Nxe3 14.dxe3 hxg3 15.Nd2
					Bxe3 16.O-O-O Rxd2 17.Rxd2 Bxg1
					18.Qc3 Rxh3 19.Rd1 Bf2 20.Qxg7
10:16	1/13	-3.40	158080904	13.Nc3 hxg3 14.Bxg4 Bxg4 15.Qxe4
					Qh4 16.Qg2 Bxh3 17.Rxh3 Qxh3 18.Qxh3+
					Rxh3 19.Ne4 Bf8 20.Ke2 Rh2+ 21.Kf3
					g2 22.Rc1



>
>>
>>I'm also still interested about 10....Ng4
>find 10...Ng4
>[d]2kr3r/ppp1qppp/2p2n2/2b2b2/2P1pP2/1P2P3/PBQPB1PP/RN2K2R b KQ f3 0 10

CM10 doesn't find Ng4 after 9 min

Time	Depth	Score	Positions	Moves
0:44	1/11	-0.52	11122685	10...Qd7 11.Bxf6 gxf6 12.Nc3 Ba3
					13.g4 Bxg4 14.Nxe4 Bxe2 15.Kxe2
					Qg4+ 16.Kf2 Rhg8 17.Ng3
0:55	1/11	-0.61	13705041	10...Kb8 11.a3 Bb6 12.O-O c5 13.Nc3
					Ba5 14.Rac1 Rhg8 15.Rce1 Qd6
2:27	1/12	-0.56	37284312	10...Kb8 11.a3 Bb6 12.Nc3 c5 13.b4
					cxb4 14.axb4 Qxb4 15.Ba3 Qa5 16.Bb2
					Qc5 17.O-O
2:58	1/12	-0.59	45796211	10...Qd7 11.a3 Be7 12.O-O h5 13.b4
					Kb8 14.Bd4 c5 15.Bxc5 Bxc5 16.bxc5
					Qc6 17.Nc3 Qxc5
7:18	1/13	-0.57	112890685	10...Qd7 11.a3 Be7 12.Be5 h5 13.Ra2
					h4 14.Nc3 h3 15.Rg1 Rdg8 16.g3 Re8


>
>>and 11....h5, although I doubt very
>>much in a computer ever playing them, even if they are tactically very great.
>find 11...h5
>[d]2kr3r/ppp1qppp/2p5/2b2b2/2P1pPn1/1P2P1P1/PBQPB2P/RN2K2R b KQ - 0 11

14:25 for CM10

Time	Depth	Score	Positions	Moves
0:12	1/10	-0.46	3203232		11...Nf6 12.a3 a5 13.Nc3 h5 14.Na4
					Ba7 15.Qc3 b6 16.Qe5 Qxe5 17.Bxe5
0:39	1/11	-0.49	9966434		11...Nf6 12.a3 a5 13.O-O Rhe8 14.b4
					axb4 15.axb4 Bxb4 16.Ra8+ Kd7 17.Ra7
					Ra8 18.Bxf6 Qxf6 19.Rxb7
1:41	1/12	-0.52	26643039	11...Nf6 12.a3 a5 13.O-O h5 14.b4
					axb4 15.axb4 Bxb4 16.Ra8+ Kd7 17.Ra7
					h4 18.g4 Nxg4 19.Rxb7
6:04	1/13	-0.44	98613688	11...Nf6 12.a3 Qe6 13.b4 Be7 14.c5
					Bh3 15.Rg1 Bg4 16.Bc4 Qd7 17.Bxf7
					Bxc5 18.Bxf6 gxf6 19.bxc5 Qxf7
					20.Qxe4
14:25	1/13	-0.47	240587684	11...h5 12.Bxg7 Rh7 13.Qc3 Qd6
					14.Be5 Nxe5 15.fxe5 Qg6 16.O-O
					Kb8 17.b4 Be7

>
>>>
>>>>Huh? That's quick!   However, I would be even more impressed if I would see that
>>>>it found 14....Rh1 or 15....Rh1  from the same position in a short time.
>>>>Could you test it for that?
>>>>And what kind of AMD and Mhz are you using?
>>>>
>>>>
>>>>[Later, I would be staggeringly fascinated to know if your computer EVER arrives
>>>>at the (possibly best moves) of 10...Ng4 and/or 11...h5. If so, I might even
>>>>propose that computers have almost solved chess!]
>>>>
>>>>Thanks!
>>>>S.Taylor



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