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Subject: Re: two am positions

Author: John Merlino

Date: 19:13:35 10/29/05

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On October 29, 2005 at 21:46:47, Will Singleton wrote:

>Here are two positions from an ICC game today.  A low-rated human played white
>against Amateur, apparently a king-attack specialist.  The second position is
>what you get if you don't avoid the first.
>
>[d]rq3rk1/p2bbpp1/2p2n1B/4pP2/3pP3/3B3P/1PP1N1P1/R1Q2RK1 b - - am gxh6; "bm
>Nh7";

CM9_R1 on an AMD 2500 needs four seconds to avoid gxh6:

Time	Depth	Score	Positions	Moves
0:00	1/3	-1.97	1657		1...gxh6 2.Qxh6 Qxb2 3.Qg5+ Kh8
					4.Qh4+ Kg7
0:00	1/4	-0.77	6717		1...gxh6 2.Qxh6 a5 3.Qg5+ Kh8 4.Qh4+
					Kg7 5.Rf3
0:00	1/5	-1.36	29062		1...gxh6 2.Qxh6 Qd6 3.Qg5+ Kh8
					4.Ng3 Nh7
0:00	1/6	-0.66	103173		1...gxh6 2.Qxh6 Qd8 3.Rf3 Nh7 4.c3
					Bg5 5.Rg3
0:00	1/7	0.00	160313		1...gxh6 2.Qxh6 Nh7 3.f6 Bxf6 4.Rxf6
					Nxf6 5.Qxf6 Qxb2 6.Qg5+ Kh7 7.Qh5+
					Kg8 8.Qg5+
0:02	1/7	-0.04	455370		1...Nh7 2.Bd2 Qb7 3.Ra5 c5 4.Qa1
					a6 5.Ng3
0:02	1/7	-0.15	512205		1...Qd6 2.Bd2 Qc7 3.c3 dxc3 4.Qxc3
					Qb6+ 5.Kh1
0:04	1/8	-0.22	816681		1...Qd6 2.Bg5 c5 3.Ng3 Qc7 4.b3
					Rab8 5.Qa3
0:09	1/9	-0.25	1941046		1...Qd6 2.Rf3 a5 3.Rg3 Nh5 4.Rg4
					Bf6 5.Ng3 Nxg3 6.Rxg3
0:17	1/10	-0.36	3678613		1...Qd6 2.Rf3 a5 3.Rg3 Nh5 4.Rg4
					Kh8 5.Ng3 Qxh6 6.Qxh6+ gxh6 7.Nxh5
					Rg8 8.Rxg8+ Kxg8
0:36	1/11	-0.30	8215407		1...Qd6 2.Rf3 a5 3.Rg3 Nh5 4.Rg4
					Kh8 5.Bd2 Nf6 6.Rg5 Nh7 7.Rg3

>[d]rq3rk1/p2bbp2/2p2n1Q/4pP2/3pP3/3B3P/1PP1N1P1/R4RK1 b - - am Nh7; "bm Qd6";

Are you sure that Qd6 is better? It looks like Black is screwed at this point.

Here's what The King says:

Time	Depth	Score	Positions	Moves
0:00	1/5	0.52	28489		1...Qd6 2.Rf3 Ng4 3.Qxd6 Bxd6 4.hxg4
					a5
0:00	1/5	-0.43	36214		1...Ne8 2.f6 Bxf6 3.Rxf6 Nxf6 4.Qxf6
					Qxb2 5.Qg5+ Kh7
0:00	1/5	-0.66	63325		1...Qd8 2.Rf3 Nh7 3.c3 Bg5 4.Rg3
0:00	1/6	0.96	77867		1...Qd8 2.Rf3 Nh7 3.Rg3+ Ng5 4.h4
					Rb8 5.hxg5 Rxb2 6.Rxa7
0:00	1/6	0.72	83612		1...Qd6 2.Rf3 Ng4 3.Qxd6 Bxd6 4.hxg4
					a5 5.Bc4
0:00	1/6	0.00	100310		1...Nh7 2.f6 Bxf6 3.Rxf6 Nxf6 4.Qxf6
					Qxb2 5.Qg5+ Kh7 6.Qh5+ Kg8 7.Qg5+
0:00	1/7	0.00	167195		1...Nh7 2.f6 Bxf6 3.Rxf6 Nxf6 4.Qxf6
					Qxb2 5.Qg5+ Kh7 6.Qh5+ Kg8 7.Qg5+
0:01	1/8	0.00	359227		1...Nh7 2.f6 Bxf6 3.Rxf6 Nxf6 4.Qxf6
					Qxb2 5.Qg5+ Kh7 6.Qh5+ Kg8 7.Qg5+
0:03	1/9	0.00	973759		1...Nh7 2.f6 Bxf6 3.Rxf6 Nxf6 4.Qxf6
					Qxb2 5.Qg5+ Kh7 6.Qh5+ Kg8 7.Qg5+
0:09	1/10	0.06	2830218		1...Nh7 2.f6 Bxf6 3.Rxf6 Nxf6 4.Qg5+
					Kh7 5.Qxf6 Qxb2 6.Ra5 Qb1+ 7.Kh2
					c5 8.Qh4+ Kg8 9.Qg5+ Kh7 10.Rxc5
0:31	1/11	0.44	9538146		1...Nh7 2.f6 Bxf6 3.Rxf6 Nxf6 4.Qxf6
					Re8 5.Rf1 Be6 6.Qh6 Qxb2 7.Qg5+
					Kh7 8.Qxe5 Rad8 9.Qh5+ Kg8
1:10	1/12	1.04	20118789	1...Nh7 2.f6 Bxf6 3.Rxf6 Nxf6 4.Qxf6
					Re8 5.Rf1 Be6 6.Ng3 Qxb2 7.Nh5
					Kf8 8.Ng7 Kg8 9.Nxe8 Rxe8 10.Qxe5
7:51	1/13	1.74	117023310	1...Nh7 2.f6 Bxf6 3.Rxf6 Nxf6 4.Qxf6
					Qd8 5.Qxe5 Qh4 6.Nxd4 Qh8 7.Qg3+
					Qg7 8.Qxg7+ Kxg7 9.Ra6 Rfb8 10.b3
					Rd8 11.Nxc6 Bxc6 12.Rxc6

And The King doesn't see anything better, at least not in under ten minutes....

jm



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