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Subject: Re: Another test position

Author: John Merlino

Date: 19:04:35 02/27/03

Go up one level in this thread


On February 26, 2003 at 14:38:41, Steffen Jakob wrote:

>Here is another one from Hossa - Fritz 8:
>
>[D]3r2k1/6pp/4bp2/8/1ppBP1P1/1q3P2/1P1R2KP/4Q3 b - - 0 39
>
>Fritz played 39... Rxd4 and was able to win the game with the b and c pawn.
>Nevertheless 39... Rxd4 is only a draw (please correct me if I am wrong) and
>therefore it should be avoided or at least evaluated as a draw.
>
>Main line: 39... Rxd4 40. Rxd4 Qxb2+ 41. Rd2 Qb3 42. Rd8+ {here Hossa played 42.
>Qh4?} Kf7 43. Qf2
>
>[D]3R4/5kpp/4bp2/8/1pp1P1P1/1q3P2/5QKP/8 b - - 0 43
>
>Whites queen becomes active and black has to give perpetual checks e.g. after
>43... g5 44. Qa7+ Kg6 45. Qe7.
>
>Greetings,
>Steffen.

Chessmaster 9000, on a P3-733, avoids Rxd4 and chooses Rc8 after five seconds:

Time	Depth	Score	Positions	Moves
0:00	1/3	0.57	824		39...c3 40.bxc3 bxc3 41.Bxc3
0:00	1/3	-0.06	1146		39...Rxd4 40.Rxd4 Qxb2+ 41.Rd2 Qa3
0:00	1/4	-0.27	5441		39...Rxd4 40.Rxd4 Qxb2+ 41.Rd2
					Qa3 42.Rd8+ Kf7 43.Qb1
0:00	1/5	-0.27	18906		39...Rxd4 40.Rxd4 Qxb2+ 41.Rd2
					Qa3 42.Kf2 Qa7+ 43.Ke2 c3
0:01	1/6	-0.34	62232		39...Rxd4 40.Rxd4 Qxb2+ 41.Rd2
					Qa3 42.Kf2 b3 43.Rd8+ Kf7 44.Ke2
0:01	1/7	-0.27	117828		39...Rxd4 40.Rxd4 Qxb2+ 41.Rd2
					Qa3 42.e5 f5 43.Qh4 fxg4 44.Qd8+
					Kf7
0:03	1/8	-0.23	246299		39...Rxd4 40.Rxd4 Qxb2+ 41.Rd2
					Qa3 42.e5 Qa8 43.Qd1 Kf7 44.exf6
					Bxg4 45.fxg7 Kxg7
0:05	1/8	-0.29	429462		39...Rc8 40.Qc1 Qa4 41.Qc2 Qc6
					42.Rd1 Qc7 43.Qa4
0:11	1/9	-0.25	947984		39...Rc8 40.Qc1 Qa4 41.h3 Qc6 42.Rd1
					c3 43.bxc3 bxc3
0:25	2/10	-0.31	2224964		39...Rc8 40.Qc1 Qa4 41.h3 Qc6 42.Rd1
					c3 43.bxc3 bxc3 44.Qc2 Qc7
1:21	3/11	-0.23	7324045		39...Rc8 40.Qc1 Qa4 41.h3 Qc6 42.Qc2
					Ra8 43.Rd1 Ra2 44.Bf2 Qc7 45.Qd2

jm



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