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Subject: Re: Nice endgame trap 'Dolle Toren' (formated)

Author: Uri Blass

Date: 22:07:43 05/27/02

Go up one level in this thread


On May 27, 2002 at 22:42:59, K. Burcham wrote:

>
>
>
>
> [D] 8/4kp1Q/5p2/4p3/5n2/3r4/r7/4R2K b - -
>
>
>Deep Shredder Paderborn
>2x1533 amd mp
>
>...Rb2   33 seconds
>
>  7.01	 0:00 	+5.27 	1...Rh3+ 2.Qxh3 Nxh3 3.Re4 (164.462) 339.0
>  8.01	 0:02 	+5.02--	1...Rh3+ 2.Qxh3 Nxh3 3.Rxe5+ Kd6 4.Rd5+ Ke6 5.Re5+ Kd7
>6.Rd5+ Ke8 7.Re5+ Kd8 8.Rd5+ Ke8 9.Re5+ Kd8 10.Rd5+ Ke8 11.Re5+ (570.060) 255.0
>  8.01	 0:02 	+5.03 	1...Rh3+ 2.Qxh3 Nxh3 3.Rxe5+ Kd6 4.Rb5 (572.229) 256.0
>  9.01	 0:04 	+5.02 	1...Rh3+ 2.Qxh3 Nxh3 3.Rxe5+ Kd6 4.Rd5+ Kc7 5.Rd7+ Kb6
>6.Rb7+ Kc5 7.Rb4 (1.737.618) 364.5
> 10.01	 0:09 	+5.00 	1...Rh3+ 2.Qxh3 Nxh3 3.Rxe5+ Kd6 4.Rd5+ Kc7 5.Rc5+ Kd8
>6.Rc3 Nf2+ 7.Kg1 Ne4 8.Rh3 f5 (4.489.498) 470.2
> 11.01	 0:22 	+4.75--	1...Rh3+ 2.Qxh3 Nxh3 3.Rxe5+ Kd6 4.Rd5+ Kc7 5.Rc5+ Kb6
>6.Rb5+ Ka7 7.Rb4 f5 8.Rb1 f4 9.Rc1 (13.193.548) 575.9
> 11.01	 0:23 	+4.75 	1...Rh3+ 2.Qxh3 Nxh3 3.Rxe5+ Kd6 4.Rd5+ Kc7 5.Rc5+ Kb6
>6.Rb5+ Kc6 7.Rc5+ Kd7 8.Rd5+ Ke8 9.Re5+ Kd8 10.Rd5+ Ke8 11.Re5+ Kd8 12.Rd5+ Ke8
>13.Re5+ (13.261.407) 576.5
> 11.04	 0:33 	+4.76++	1...Rb2 2.Qh6 Rh3+ 3.Qxh3 Nxh3 4.Rxe5+ Kd6 5.Rd5+ Ke6
>6.Re5+ Kd7 7.Rd5+ Ke6 8.Re5+ Kd7 9.Rd5+ Ke6 10.Re5+ (20.710.222) 623.7
> 11.04	 0:41 	+5.00 	1...Rb2 2.Qf5 Rh3+ 3.Qxh3 Nxh3 4.Rxe5+ Kd6 5.Rd5+ Ke6
>6.Re5+ Kd7 7.Rd5+ Ke6 8.Re5+ Kd7 9.Rd5+ Ke6 10.Re5+ (26.797.035) 646.6
> 12.01	 1:21 	+4.75--	1...Rb2 2.Qf5 Rh3+ 3.Qxh3 Nxh3 4.Rxe5+ Kf8 5.Re8+ Kg7
>6.Rg8+ Kh6 7.Rh8+ Kg7 8.Rxh3 Rb1+ (54.647.667) 671.1
> 12.01	 1:22 	+4.75 	1...Rb2 2.Qf5 Rh3+ 3.Qxh3 Nxh3 4.Rxe5+ Kd8 5.Rd5+ Ke8 6.Rd3
>Nf2+ 7.Kh2 (55.247.861) 670.9
> 13.01	 3:21 	+4.74 	1...Rb2 2.Qf5 Rh3+ 3.Qxh3 Nxh3 4.Rxe5+ Kd8 5.Rd5+ Ke8
>6.Re5+ Kd7 7.Rd5+ Ke6 8.Re5+ Kd7 9.Rd5+ Ke6 10.Re5+ Kd7 11.Rd5+ (138.575.981)
>687.5
> 13.07	 4:29 	+4.75++	1...Rb3 2.Qf5 Rh3+ 3.Qxh3 Nxh3 4.Rxe5+ Kd6 5.Rd5+ Kc7
>6.Rc5+ Kb6 7.Rb5+ Kc6 8.Rc5+ Kd7 9.Rd5+ Ke8 10.Re5+ Kd8 11.Rd5+ Ke8 12.Re5+ Kd8
>13.Rd5+ Ke8 14.Re5+ (188.198.434) 699.2
> 13.07	 4:38 	+4.75 	1...Rb3 2.Qf5 Rh3+ 3.Qxh3 Nxh3 4.Rxe5+ Kd6 5.Rd5+ Kc7
>6.Rc5+ Kb6 7.Rb5+ Kc6 8.Rc5+ Kd7 9.Rd5+ Ke8 10.Re5+ Kd8 11.Rd5+ Ke8 12.Re5+ Kd8
>13.Rd5+ Ke8 14.Re5+ (195.056.756) 700.8
> 14.01	 6:48 	+4.75 	1...Rb3 2.Qf5 Rh3+ 3.Qxh3 Nxh3 4.Rxe5+ Kd6 5.Rd5+ Kc7
>6.Rc5+ Kb6 7.Rb5+ Kc6 8.Rc5+ Kd7 9.Rd5+ Ke8 10.Re5+ Kd8 11.Rd5+ Ke8 12.Re5+ Kd8
>13.Rd5+ Ke8 14.Re5+ (288.058.569) 705.3
> 15.01	17:26 	+4.75 	1...Rb3 2.Qf5 Rh3+ 3.Qxh3 Nxh3 4.Rxe5+ Kd6 5.Rd5+ Kc7
>6.Rc5+ Kb6 7.Rb5+ Kc6 8.Rc5+ Kd7 9.Rd5+ Ke8 10.Re5+ Kd7 11.Rd5+ Ke8 12.Re5+ Kd7
>13.Rd5+ Ke8 (747.878.841) 714.8
>best move: Rd3-b3 time: 24:09.000 min  n/s: 723.137  CPU 193.4%  nodes:
>1.047.826.260 TB: 178.167
>
>kburcham


The pv 1...Rb3 2.Qf5 Rh3+ 3.Qxh3 gives exactly the same position as after
1...Rh3+ 2.Qxh3

I have ideas how to solve the problem and maybe I am going to implement them in
the future but I will need to check that I am not going to have problems in
other positions and I do not hurry to add solutions that seem intuitively
correct.

Note that Kd6 disable the threat because after 1...Kd6 2.Qf5 Rh3+ Qxh3 Nxh3 Rd1+
Ke6 Rd6+ Kf5 Rxf6+ Ke4 white can resign but programs do not like to lose pawns
so they do not like it.

Uri



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