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Subject: Re: Mate-in-18 revisited

Author: John Merlino

Date: 18:59:18 04/14/05

Go up one level in this thread


On April 14, 2005 at 21:38:41, Mike Byrne wrote:

>modified Crafty 19.20
>dual opteron 1.8 Ghz
>posted several times before - wonder how the current crop of engines deal with
>this problem on more current hardware
>
>
>White(1): [d]1r4r1/3q1npk/2b1pbnp/Rp1p4/1N1P3P/2PQ1pP1/1K3B2/5B1R w - - 0 1
>White(1): g
>              clearing hash tables
>              time surplus   0.00  time limit 1000:00 (1000:00)
>              depth   time  score   variation (1)
>starting thread 1
>                6->   0.05  -2.89   1. h5 Ng5 2. hxg6+ Kh8 3. Qe3 Rgc8
>                                    4. Nxc6 Qxc6 5. Ra7
>                7     0.08  -2.94   1. h5 Ng5 2. hxg6+ Kh8 3. Qe3 Rgc8
>                                    4. Kb1 Qc7 5. Nxc6 Qxc6
>                7->   0.13  -2.94   1. h5 Ng5 2. hxg6+ Kh8 3. Qe3 Rgc8
>                                    4. Kb1 Qc7 5. Nxc6 Qxc6
>                8     0.24  -3.02   1. h5 Ng5 2. hxg6+ Kh8 3. Qe3 Rgc8
>                                    4. Kb1 Kg8 5. g4 Ra8 6. Nxc6 Qxc6 7.
>                                    Bxb5
>                8->   0.44  -3.02   1. h5 Ng5 2. hxg6+ Kh8 3. Qe3 Rgc8
>                                    4. Kb1 Kg8 5. g4 Ra8 6. Nxc6 Qxc6 7.
>                                    Bxb5 (s=2)
>                9     0.92  -3.14   1. h5 Ng5 2. hxg6+ Kh8 3. Ra7 Qxa7
>                                    4. Nxc6 Qc7 5. Nxb8 Rxb8 6. Kb1
>                9->   1.59  -3.14   1. h5 Ng5 2. hxg6+ Kh8 3. Ra7 Qxa7
>                                    4. Nxc6 Qc7 5. Nxb8 Rxb8 6. Kb1 (s=2)
>               10     3.14  -3.28   1. h5 Ng5 2. hxg6+ Kh8 3. Qe3 Ra8 4.
>                                    Nxc6 Qxc6 5. Rxb5 Rgb8 6. Rxb8+ Rxb8+
>                                    7. Kc1 Ne4 8. Qxf3 Nxc3
>               10->   5.49  -3.28   1. h5 Ng5 2. hxg6+ Kh8 3. Qe3 Ra8 4.
>                                    Nxc6 Qxc6 5. Rxb5 Rgb8 6. Rxb8+ Rxb8+
>                                    7. Kc1 Ne4 8. Qxf3 Nxc3
>               11    13.50  -2.99   1. h5 Ng5 2. hxg6+ Kh8 3. Be3 Rgf8
>                                    4. Ra7 Rb7 5. Ra6 Rc7 6. Bf2 Qc8 7.
>                                    Rxc6 Rxc6 8. Nxc6 Qxc6 9. Qxb5
>               11->  18.03  -2.99   1. h5 Ng5 2. hxg6+ Kh8 3. Be3 Rgf8
>                                    4. Ra7 Rb7 5. Ra6 Rc7 6. Bf2 Qc8 7.
>                                    Rxc6 Rxc6 8. Nxc6 Qxc6 9. Qxb5
>               12    21.84  -2.99   1. h5 Ng5 2. hxg6+ Kh8 3. Be3 Rgf8
>                                    4. Rh2 Bd8 5. Ra3 Qc8 6. Bf4 Rb6 7.
>                                    Rf2 Be8
>               12->  32.59  -2.99   1. h5 Ng5 2. hxg6+ Kh8 3. Be3 Rgf8
>                                    4. Rh2 Bd8 5. Ra3 Qc8 6. Bf4 Rb6 7.
>                                    Rf2 Be8 (s=2)
>               13     1:09  -2.86   1. h5 Kh8 2. hxg6 Ng5 3. Be3 Rgf8 4.
>                                    Bf4 Rbc8 5. Qe3 Kg8 6. Qf2 Qb7 7. Bd3
>                                    Qb6 8. Ra6 <HT>
>               13     1:57     +1   1. Qxg6+!!
>               13     2:22     +3   1. Qxg6+!!
>               13     2:37     +M   1. Qxg6+!!
>               13     2:52   1.95   1. Qxg6+ Kxg6 2. Bd3+ Kh5 3. g4+ Kxg4
>                                    4. Rg1+ Kh3 5. Bf1+ Kh2 6. Bg3+ Kxg1
>                                    7. Ra1 Ra8 8. Rb1 Ra1 9. Kxa1 Ra8+
>                                    10. Kb2 Ra1 11. Rxa1 Qa7 12. Rxa7 Kxf1
>                                    13. Nxc6 Kg2
>               13->   2:59   1.95   1. Qxg6+ Kxg6 2. Bd3+ Kh5 3. g4+ Kxg4
>                                    4. Rg1+ Kh3 5. Bf1+ Kh2 6. Bg3+ Kxg1
>                                    7. Ra1 Ra8 8. Rb1 Ra1 9. Kxa1 Ra8+
>                                    10. Kb2 Ra1 11. Rxa1 Qa7 12. Rxa7 Kxf1
>                                    13. Nxc6 Kg2 (s=2)
>               14     3:43     +1   1. Qxg6+!!
>               14     4:32     +3   1. Qxg6+!!
>               14     4:56     +M   1. Qxg6+!!
>               14    10:37  Mat15   1. Qxg6+ Kxg6 2. Bd3+ Kh5 3. g4+ Kxg4
>                                    4. Rg1+ Kh3 5. Bf1+ Kh2 6. Bg3+ Kxg1
>                                    7. Ra1 Ra8 8. Rb1 Ra1 9. Kxa1 Ra8+
>                                    10. Kb2 Ra1 11. Rxa1 Qa7 12. Rb1 Qa1+
>                                    13. Kxa1 Bg5 14. Bh3+ Bc1 15. Rxc1#
>               14->  10:41  Mat15   1. Qxg6+ Kxg6 2. Bd3+ Kh5 3. g4+ Kxg4
>                                    4. Rg1+ Kh3 5. Bf1+ Kh2 6. Bg3+ Kxg1
>                                    7. Ra1 Ra8 8. Rb1 Ra1 9. Kxa1 Ra8+
>                                    10. Kb2 Ra1 11. Rxa1 Qa7 12. Rb1 Qa1+
>                                    13. Kxa1 Bg5 14. Bh3+ Bc1 15. Rxc1#
>?              15    10:45   1/44*  1. Qxg6+
>White(1): ?
>              time=10:57  cpu=199%  mat=-5  n=2668197655  fh=91%  nps=4.06M
>              ext-> chk=157229884 cap=4709222 pp=7994116 1rep=22343616 mate=3267
>860
>              predicted=0  nodes=2668197655  evals=255024327  50move=0
>              endgame tablebase-> probes=0  hits=0
>              SMP->  split=2895  stop=575  data=9/64  cpu=21:49  elap=10:57
>
>mate in 15 moves.
>
>
>White(1): Qxg6+
>              time used:  10:57
>Black(1):

CM9_R1 on an AMD 2500 announces the Mate in 15 in 8:21....

Time	Depth	Score	Positions	Moves
0:00	1/3	-1.15	1541		1.h5 Nh8 2.hxg6+ Nxg6 3.Nxc6 Qxc6
					4.Qxf3
0:00	1/4	-1.28	6815		1.h5 Ng5 2.Qxg6+ Kh8 3.Ra6 Ba8
					4.Be3
0:00	1/5	-1.42	24287		1.h5 Ng5 2.Nxc6 Qxc6 3.Ra7 Qe8
					4.hxg6+ Qxg6
0:00	1/6	-1.34	62012		1.h5 Ng5 2.Qxg6+ Kh8 3.Be3 Ne4
					4.Bxh6 Rgf8 5.Bf4
0:00	1/7	-1.64	184286		1.h5 Ng5 2.Qxg6+ Kh8 3.Be3 Rbc8
					4.Nxc6 Qxc6 5.Bd2 Ne4 6.Bxb5
0:03	1/8	-1.67	802719		1.h5 Ng5 2.Qxg6+ Kh8 3.Na6 Ra8
					4.Nc5 Qc7 5.Rxa8 Rxa8
0:18	1/9	-1.93	4573944		1.h5 Nd6 2.hxg6+ Kh8 3.Qxf3 Rgf8
					4.Be3 Nc4+ 5.Bxc4 bxc4 6.Rf1 Be7
0:53	1/10	-1.91	13450607	1.h5 Kh8 2.hxg6 Nd6 3.Qe3 Rgc8
					4.g4 Ne4 5.Qxf3 Ba8 6.Be1 Qc7
1:41	1/11	-1.81	25945956	1.h5 Kh8 2.hxg6 Nd6 3.Qe3 Rgc8
					4.g4 Ne4 5.Qxf3 Ba8 6.Be1 Qc7 7.Ra6
3:13	1/12	-1.94	50875990	1.h5 Kh8 2.Qxg6 Nd6 3.Ra6 Rgc8
					4.Bd3 Ne4 5.Bxe4 dxe4 6.Nxc6 Rxc6
					7.Ra3 Be7 8.Raa1
4:02	1/12	2.86	66425416	1.Qxg6+ Kxg6 2.Bd3+ Kh5 3.g4+ Kxg4
					4.Rg1+ Kh3 5.Bf1+ Kh2 6.Bg3+ Kxg1
					7.Ra1 Qa7 8.Re1 Qa3+ 9.Kxa3 Ra8+
					10.Kb2 f2 11.Rb1 Ra1 12.Kxa1 Ra8+
					13.Kb2 Ra2+ 14.Kxa2
6:11	1/13	6.06	109033954	1.Qxg6+ Kxg6 2.Bd3+ Kh5 3.g4+ Kxg4
					4.Rg1+ Kh3 5.Bf1+ Kh2 6.Bg3+ Kxg1
					7.Ra1 Ra8 8.Rb1 Ra1 9.Kxa1 Ra8+
					10.Na2 Rxa2+ 11.Kxa2 Qa7+ 12.Kb2
					Qa3+ 13.Kxa3 Be7+ 14.Kb2 Ba3+ 15.Kxa3
					b4+ 16.cxb4
8:21	2/14	Mate15	158174851	1.Qxg6+ Kxg6 2.Bd3+ Kh5 3.g4+ Kxg4
					4.Rg1+ Kh3 5.Bf1+ Kh2 6.Bg3+ Kxg1
					7.Ra1 Ra8 8.Rb1 Ra1 9.Kxa1 Ra8+
					10.Kb2 Ra1 11.Kxa1 Qa7+ 12.Na2
					Qxa2+ 13.Kxa2 f2 14.Bh3+ f1=Q 15.Rxf1#

jm



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