Computer Chess Club Archives


Search

Terms

Messages

Subject: Re: Pawn Promotion and Queen Sacrifice Test

Author: John Merlino

Date: 11:13:21 02/13/05

Go up one level in this thread


On February 13, 2005 at 07:48:18, Rob Basham wrote:

>[D]8/1p2pk2/5p1P/4p2K/4P1P1/P4P2/1P5R/6r1 w - - 0 1
>
>Hey SteveB....Good test for portable units too...
>
>It takes Novag Amber 2 min. and 33 sec. to find ...1. h7...!
>
>If ....Kg7,
>
>2. h8(Q)+ wins!,
>
>My old WChess missed this one....:-)
>
>Polgar also missed this even after 10 minutes!
>
>Super VIP Novag takes  over 3 min. to find ...h7...etc.
>
>Fidelity Excellence takes over 4 minutes.
>
>Mach3 finds it in 15 sec....!

CM9_SKR on a P4-2.4 sees h7 instantly, and announces Mate in 13 after just over
a minute:

Time	Depth	Score	Positions	Moves
0:00	2/4	2.26	2443		1.Rh3 Rg2 2.b3 Kg8
0:00	2/5	2.40	6145		1.Rh3 Re1 2.g5 Rg1 3.gxf6 exf6
0:00	3/6	1.98	11025		1.Rh3 b5 2.b3 Ra1 3.g5 Rxa3
0:00	3/6	2.05	11815		1.h7 Kg7 2.h8=Q+ Kxh8 3.Kg6+ Kg8
					4.Rh7 Rd1 5.Rxe7
0:00	3/7	9.78	29138		1.h7 Rg2 2.Rxg2 Kg7 3.g5 Kxh7 4.g6+
					Kg7
0:00	3/8	10.39	50114		1.h7 Rg2 2.Rxg2 Kg7 3.Rc2 Kxh7
					4.Rc7 b5 5.Rxe7+ Kg8
0:00	4/9	10.39	57152		1.h7 Rg2 2.Rxg2 Kg7 3.Rc2 Kxh7
					4.Rc7 b5 5.Rxe7+ Kg8
0:00	5/10	10.60	90204		1.h7 Rg2 2.Rxg2 Kg7 3.Rc2 Kxh7
					4.Rc7 b5 5.Rxe7+ Kg8 6.Kg6
0:05	6/11	15.51	1233293		1.h7 Rd1 2.h8=Q Rd6 3.Rc2 Rc6 4.Rd2
					Rd6 5.Qh7+ Ke6 6.Qf5+ Kf7 7.Rxd6
					exd6 8.Qd7+ Kf8 9.Qxb7
0:15	7/12	19.39	3833858		1.h7 Rc1 2.h8=Q Rc6 3.Qh7+ Kf8
					4.Rd2 Rd6 5.Rxd6 exd6 6.Kg6 Ke8
					7.Kxf6 Kd8 8.Ke6 Kc8 9.Qd7+ Kb8
					10.Qd8+ Ka7 11.Qa5+ Kb8 12.Kxd6
					b6 13.Qxb6+ Ka8 14.Kxe5
1:05	8/13	Mate13	17733016	1.h7 Rf1 2.h8=Q Rc1 3.Qh7+ Ke8
					4.Qg8+ Kd7 5.Rd2+ Kc6 6.Qe6+ Kb5
					7.Rd7 Rc7 8.Qb3+ Kc6 9.Qd5+ Kb6
					10.b4 e6 11.Qa5+ Kc6 12.Rxc7+ Kd6
					13.Qc5#
1:47	9/14	Mate11	30398740	1.h7 Ke6 2.h8=Q Rc1 3.Qe8 Kd6 4.Rd2+
					Kc7 5.Qd8+ Kc6 6.b4 Rh1+ 7.Kg6
					Rh6+ 8.Kxh6 Kb5 9.Qa5+ Kc4 10.Qd5+
					Kc3 11.Qd3#

jm



This page took 0 seconds to execute

Last modified: Thu, 15 Apr 21 08:11:13 -0700

Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.