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Subject: Re: how long till your program avoids 15.Bg5...

Author: John Merlino

Date: 17:40:47 01/30/06

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On January 30, 2006 at 20:09:06, Dan Ellwein wrote:

>[Event ""]
>[Site ""]
>[Date "2006.1.30"]
>[Round ""]
>[White "Behemoth"]
>[Black "CMX_Rybka"]
>[TimeControl "40/2400"]
>[Result "0-1"]
>[ECO "C43"]
>
>Time Control 40/40 moves/min
>
>P3/850
>
>1.e4 e5 2.Nf3 Nf6 3.d4 Nxe4 4.Nxe5 d6 5.Nf3 d5 6.Bd3 Be7 7.Nbd2 Nf6 8.O-O O-O
>9.Re1 c5 10.dxc5 Bxc5 11.Nb3 Bd6 12.c4 dxc4
>13.Bxc4 Qc7 14.Qd3 Nc6
>
>[d]r1b2rk1/ppq2ppp/2nb1n2/8/2B5/1N1Q1N2/PP3PPP/R1B1R1K1 w - - 0 15
>
>
>15.Bg5?
>
>...Ng4 16.Rac1

Perhaps 16.Qe4 is a better follow-up than 16.Rac1. Here's what CM9_R1 says on an
AMD 2500:

Time	Depth	Score	Positions	Moves
0:00	1/3	0.66	1854		15.Bg5 Ne5 16.Nxe5 Bxe5
0:00	1/4	0.45	5105		15.Bg5 Ne5 16.Nxe5 Bxe5 17.Rac1
					Bxh2+ 18.Kf1
0:00	1/5	0.43	22601		15.Bg5 Ne5 16.Nxe5 Bxe5 17.Bxf6
					Bxf6
0:00	1/6	0.53	82836		15.Bg5 Ne5 16.Nxe5 Bxe5 17.Rac1
					Bxb2 18.Rc2
0:01	1/7	0.39	221795		15.Bg5 Ne5 16.Nxe5 Bxe5 17.Rac1
					Bxh2+ 18.Kh1 Ng4 19.Re2 Be5
0:03	1/8	0.05	746531		15.Bg5 Ng4 16.Qe4 Bxh2+ 17.Kf1
					Bd6 18.Rad1 Bd7 19.Kg1 Bh2+ 20.Nxh2
					Qxh2+ 21.Kf1 Qh1+ 22.Ke2
0:13	1/9	-0.11	3177660		15.Bg5 Ng4 16.Qe4 h6 17.Bh4 Nxh2
					18.Rad1 Nxf3+ 19.Qxf3 Be6 20.Rxe6
					fxe6 21.Bxe6+ Kh8
0:38	1/10	0.00	9667655		15.Bg5 Ng4 16.Rac1 Bxh2+ 17.Kf1
					Nge5 18.Nxe5 Bxe5 19.Qc2 Bd7 20.Red1
					Rac8
1:43	1/11	-0.11	27023772	15.Bg5 Ng4 16.Qe4 h6 17.Bd2 Bxh2+
					18.Kf1 Nf6 19.Qd3 Ne5 20.Nxe5 Bxe5
					21.Bb4 Bxb2 22.Bxf8 Kxf8
4:36	1/12	-0.26	74886806	15.Bg5 Ng4 16.Qe4 Bxh2+ 17.Kf1
					h6 18.Bd3 g6 19.Bd2 Bf5 20.Qc4
					Bxd3+ 21.Qxd3 Bd6 22.Re4
15:15	1/13	-0.14	251871923	15.Bg5 Ng4 16.Qe4 Bxh2+ 17.Kf1
					Nce5 18.Bd5 Qb6 19.Re2 Nxf3 20.Qxf3
					Bd6 21.Kg1 Ne5 22.Qc3 Re8

jm



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