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Subject: Re: Test Position: Shredder 8 Blunder?

Author: John Merlino

Date: 11:19:01 12/16/04

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On December 16, 2004 at 13:50:26, paul bedrey wrote:

>Looking through a game between Shredder 8 and Junior 9 posted by Thomas Logan I
>came upon this critical point in the game:
>
>[D]5rk1/6q1/4r2p/1BPp1R2/P2Pn3/3Q2p1/4R1P1/6K1 w - - 0 43
>
>The game was roughly even up to move 43.
>Shredder 8 took the pawn at D5 and lost the game! How many other programs fall
>for this? Gambit Tiger immediately recognizes the mistake.

CM9_SKR on a P4-2.4 needs 0:42 to see that Rxd5 is bad:

Time	Depth	Score	Positions	Moves
0:00	1/5	1.36	21345		43.Rxf8+ Kxf8 44.a5 Rf6 45.a6 Qf7
					46.Rxe4 dxe4 47.Qxg3
0:00	1/5	1.38	32163		43.Rxd5 Qf7 44.Rc2 Nxc5 45.Qxg3+
					Rg6 46.Qxg6+ Qxg6 47.Rdxc5
0:00	1/6	1.60	77356		43.Rxd5 Qf7 44.Rc2 Kh8 45.a5 Qf4
					46.Rd7
0:01	1/7	1.25	272846		43.Rxd5 Qf7 44.Rc2 Qf4 45.Qf3 Nd2
					46.Rxd2 Qxd2 47.Qxg3+ Kh8
0:02	1/7	1.29	383923		43.Rxf8+ Qxf8 44.Bd7 Re7 45.c6
					Qf4 46.Qf3 Qc1+ 47.Qf1
0:04	1/8	1.24	796172		43.Rxf8+ Kxf8 44.Re1 Rf6 45.a5
					Qc7 46.a6 Qf4 47.Qf3 Qxf3 48.gxf3
					Rxf3
0:13	2/9	0.94	2678196		43.Rxf8+ Kxf8 44.Re3 Ke7 45.c6
					Kd8 46.Rf3 Rf6 47.Qe3 Rxf3 48.gxf3
0:19	2/9	1.00	3784746		43.Rxd5 Qg4 44.Bc4 Qh4 45.Rh5 Qxh5
					46.Bxe6+ Kh8 47.Bh3 Nf2 48.Qe3
					Nxh3+ 49.gxh3 Qxh3 50.Qe5+ Kg8
0:36	2/10	-0.65	7450836		43.Rxd5 Qf7 44.Rc2 Qf4 45.Bd7 Ref6
					46.Rf5 Rxf5 47.Bxf5 Rxf5 48.a5
					Nc3 49.a6
0:42	2/10	1.03	8671485		43.Rxf8+ Kxf8 44.Re3 Ke7 45.c6
					Kd8 46.Rf3 Kc7 47.Qe3 Rf6 48.Rxf6
					Qxf6
0:57	2/11	1.02	11658496	43.Rxf8+ Kxf8 44.Re3 Ke7 45.c6
					Kd8 46.Rf3 h5 47.Rf5 Nd6 48.Rf1 Rf6
2:15	3/12	0.63	27768611	43.Rxf8+ Kxf8 44.Qe3 Kg8 45.c6
					Qf7 46.Qf3 Rf6 47.Qg4+ Kf8 48.Rb2
					Rf2 49.Qc8+ Kg7 50.Be2 Ng5

jm



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