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Subject: Re: Yet another sacrifice

Author: John Merlino

Date: 19:17:05 08/08/02

Go up one level in this thread


On August 08, 2002 at 21:31:19, José Carlos wrote:

>  This one should be easy for positional reasons:
>
>[D]r2q1rk1/pb1nbp2/4p2p/2ppP1pQ/N2N4/6B1/PPP2PPP/R4RK1 w - - 0 15 bm Nxe6;
>
>  But probably the key move on the variation to know it's more than a draw is:
>
>[D]r2q1r1k/pb1nb3/4p1Q1/2ppP1p1/N7/6B1/PPP2PPP/R4RK1 w - - 0 19 bm f4;
>
>  What do your programs say?
>
>
>  The game:
>
>[Event "ICS rated standard match"]
>[Site "204.178.125.65"]
>[Date "2002.08.06"]
>[Round "-"]
>[White "AvernoX"]
>[Black "Dorky"]
>[Result "1-0"]
>[WhiteElo "2288"]
>[BlackElo "2327"]
>[TimeControl "3600+10"]
>
>1. Nc3 e6 2. e4 d5 3. Nf3 Nf6 4. e5 Nfd7 5. d4 c5 6. dxc5 Nc6 7. Bf4 h6 8.
>Bb5 Bxc5 9. O-O g5 10. Bg3 O-O 11. Na4 Be7 12. Bxc6 bxc6 13. Nd4 Bb7 14.
>Qh5 c5 15. Nxe6 fxe6 16. Qg6+ Kh8 17. Qxh6+ Kg8 18. Qg6+ Kh8 19. f4 gxf4
>20. Bxf4 Bh4 21. Qh6+ Kg8 22. Qxe6+ Kh8 23. Qh6+ Kg8 24. e6 Ba6 25. Qg6+
>Kh8 26. exd7 Bxf1 27. Qh5+ Kg8 28. Qxd5+ Kh7 29. Rxf1 Qf6 30. Nxc5
>{Dorky resigns} 1-0
>
>  José C.

Chessmaster 9000 sees Nxe6 instantly on a PIII-600, but wants to do 19.Qxe6
BEFORE f4:

Time	Depth	Score	Positions	Moves
0:00	1/3	0.00	2519		15.Nxe6 fxe6 16.Qg6+ Kh8 17.Qxh6+
					Kg8 18.Qg6+ Kh8 19.Qxe6 d4 20.Qh6+
					Kg8 21.Qg6+ Kh8 22.Qh6+
0:00	1/4	0.00	5483		15.Nxe6 fxe6 16.Qg6+ Kh8 17.Qxh6+
					Kg8 18.Qg6+ Kh8 19.Qxe6 d4 20.Qh6+
					Kg8 21.Qg6+ Kh8 22.Qh6+
0:00	1/5	0.18	30664		15.Nxe6 fxe6 16.Qg6+ Kh8 17.Qxh6+
					Kg8 18.Qg6+ Kh8 19.Qxe6 Nb6 20.Qh6+
					Kg8 21.Qg6+ Kh8 22.Nc3 Qd7 23.e6
0:02	1/6	0.36	109829		15.Nxe6 fxe6 16.Qg6+ Kh8 17.Qxh6+
					Kg8 18.Qg6+ Kh8 19.f4 d4 20.Qh6+
					Kg8 21.Qxe6+ Kh8 22.Qh6+ Kg8 23.f5
					Rf7 24.Rae1
0:04	1/7	0.28	299926		15.Nxe6 fxe6 16.Qg6+ Kh8 17.Qxh6+
					Kg8 18.Qg6+ Kh8 19.f4 Qe8 20.Qxe6
					gxf4 21.Qh3+ Kg7 22.Qg4+ Kh8 23.Bxf4
0:10	1/8	0.27	739454		15.Nxe6 fxe6 16.Qg6+ Kh8 17.Qxh6+
					Kg8 18.Qg6+ Kh8 19.Qxe6 Nb6 20.Nxb6
					axb6 21.Qh6+ Kg8 22.f4 Rf7 23.f5
					Bf8
0:33	1/9	0.21	2528247		15.Nxe6 fxe6 16.Qg6+ Kh8 17.Qxh6+
					Kg8 18.Qg6+ Kh8 19.Qxe6 Nb6 20.Nxb6
					axb6 21.f4 Ba6 22.Rfd1 Bc4 23.Qh6+
					Kg8 24.Qg6+ Kh8
1:33	1/10	0.20	7111670		15.Nxe6 fxe6 16.Qg6+ Kh8 17.Qxh6+
					Kg8 18.Qg6+ Kh8 19.Qxe6 Kg7 20.f4
					a5 21.f5 Ra6 22.f6+ Nxf6 23.exf6+
					Bxf6 24.Qe3 Bd4
4:12	2/11	0.37	18153684	15.Nxe6 fxe6 16.Qg6+ Kh8 17.Qxh6+
					Kg8 18.Qg6+ Kh8 19.Qxe6 Qe8 20.f4
					Rf7 21.fxg5 Rg7 22.Qh3+ Kg8 23.Bf4
					Bxg5 24.Bxg5 Rxg5 25.e6

Nothing changes even if I force the moves up to White's 19th -- CM9000 still
wants to do Qxe6 first:

Time	Depth	Score	Positions	Moves
0:00	1/3	0.00	660		19.Qh6+
0:00	1/4	0.00	1645		19.Qh6+
0:00	1/4	0.18	9688		19.Qxe6 Nb6 20.Qh6+ Kg8 21.Qg6+
					Kh8 22.Nc3 Qd7 23.e6
0:00	1/5	0.19	24055		19.Qxe6 Nb6 20.Nxb6 axb6 21.Qh6+
					Kg8 22.f4
0:01	1/5	0.36	71403		19.f4 d4 20.Qh6+ Kg8 21.Qxe6+ Kh8
					22.Qh6+ Kg8 23.f5 Rf7 24.Rae1
0:02	1/6	0.28	149613		19.f4 Qe8 20.Qxe6 gxf4 21.Qh3+
					Kg7 22.Qg4+ Kh8 23.Bxf4
0:04	1/7	0.24	283265		19.f4 Qe8 20.Qxe6 Rf7 21.fxg5 Rxf1+
					22.Rxf1 Bxg5
0:05	1/7	0.27	352777		19.Qxe6 Nb6 20.Nxb6 axb6 21.Qh6+
					Kg8 22.f4 Rf7 23.f5 Bf8
0:09	1/8	0.21	649543		19.Qxe6 Nb6 20.Nxb6 axb6 21.f4
					Ba6 22.Rfd1 Bc4 23.Qh6+ Kg8 24.Qg6+
					Kh8
0:30	1/9	0.20	2246964		19.Qxe6 Kg7 20.f4 a5 21.f5 Ra6
					22.f6+ Nxf6 23.exf6+ Bxf6 24.Qe3
					Bd4
2:04	1/10	0.37	9085580		19.Qxe6 Qe8 20.f4 Rf7 21.fxg5 Rg7
					22.Qh3+ Kg8 23.Bf4 Bxg5 24.Bxg5
					Rxg5 25.e6

jm



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