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Subject: Re: Engines do not get fooled by easy sacrifices anymore -game POS from 1985

Author: Vincent Lejeune

Date: 07:51:23 11/10/03

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On November 10, 2003 at 10:43:35, Vincent Lejeune wrote:

>On November 09, 2003 at 20:57:35, Cliff Sears wrote:
>
>>Interesting position on how engines can look much deeper today.
>>
>>This position was from a game by
>>Novag Monster Y vs.Daniel King in 1985 (from his book Kasparov v Deeper Blue)
>>
>>
>>1q3bk1/R4pp1/5r2/5Q1p/1p4n1/5BP1/1PP4P/6BK w - - 0 1
>>
>>Many engines still byte on this early in their analysis but generally see the
>>correct position after D9
>
>subsidiary question : how much time to find better than 2.5 advantage for black
>after Qxh5? ?
>
>[d]1q3bk1/R4pp1/5r2/7Q/1p4n1/5BP1/1PP4P/6BK b - - 0 1

CM 9000 SKR + ss=16 : 5m30s

AMD Barton 2800+

Time	Depth	Score	Positions	Moves
0:00	1/4	0.75	4446		1...Rxf3 2.Qxg4 Rf1 3.Qd7 Qe5
0:00	1/5	0.99	16121		1...Rxf3 2.Qxg4 Rf1 3.Qd4 Bd6 4.Rd7
0:00	1/6	0.54	57795		1...Rxf3 2.Qxg4 Rf1 3.Qd4 Bd6 4.c3
					bxc3 5.bxc3
0:00	1/7	0.73	92214		1...Rxf3 2.Qxg4 Rf1 3.Qd4 Qc8 4.c4
					bxc3ep 5.Qxc3
0:00	1/8	-0.11	201179		1...Rxf3 2.Qxg4 Rf1 3.Qd4 Qc8 4.Rd7
					Qxc2 5.Qd3 Qf2
0:02	1/9	-0.46	619397		1...Rxf3 2.Qxg4 Rf1 3.Qd4 Qe8 4.Ra5
					Qc6+ 5.Rd5 Qxc2 6.Qd3 Qf2
0:04	1/10	-0.63	1356353		1...Rxf3 2.Qxg4 Rf1 3.Qd4 Qe8 4.h3
					Qc6+ 5.Kh2 Qxc2+ 6.Kh1 Rd1 7.Qf4
0:11	1/11	-1.03	3595586		1...Rxf3 2.Qxg4 Rf1 3.Qd4 Qb5 4.Rc7
					Qf5 5.Kg2 Qf3+ 6.Kh3 Re1 7.Bf2
					Re2 8.Bg1 Bd6
0:27	1/12	-1.23	8586351		1...Rxf3 2.Qxg4 Rf1 3.Qd4 Qb5 4.Rc7
					Qf5 5.Qd2 Bc5 6.Rxc5 Qxc5 7.Qd8+
					Kh7 8.Qh4+ Kg6 9.Qe4+ Qf5 10.Qc6+
					f6 11.Qg2 Qf3
1:33	1/13	-1.95	28980302	1...Rxf3 2.Qxg4 Rf1 3.Qd4 Qb5 4.Rc7
					Qf5 5.Qd2 Bc5 6.Rxc5 Qxc5 7.Qd8+
					Qf8 8.Qd5 Qc8 9.c4 bxc3ep 10.bxc3
					Qxc3 11.Qd8+ Kh7
5:30	1/14	-3.13	102970765	1...Rxf3 2.Qxg4 Rf1 3.Qd4 Qc8 4.Kg2
					Rxg1+ 5.Qxg1 Bc5 6.Qe1 Qc6+ 7.Kh3
					Bxa7 8.Qxb4 Qxc2 9.Qe7 Qf5+ 10.g4
					Qf3+ 11.Kh4



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