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Subject: Mate-in-18 revisited

Author: Mike Byrne

Date: 18:38:41 04/14/05


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):



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

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