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Subject: is there a shorter mate?

Author: Mike Byrne

Date: 11:19:49 12/28/03




Black(1): [d]5K1k/1R1P4/8/b7/4r3/3B4/3p4/8 w - - 0 1
White(1): move
end-game phase
              time surplus   0.00  time limit 1666:39 (1666:39)/(-25)
              depth   time  score   variation (1)
                3     0.00   0.00   1. Bc2 Re1 2. Kf7 d1=Q 3. Bxd1 Rxd1
                3->   0.00   0.00   1. Bc2 Re1 2. Kf7 d1=Q 3. Bxd1 Rxd1
                4     0.02   0.00   1. Bc2 Re1 2. Kf7 d1=Q 3. Bxd1 Rxd1
                4->   0.02   0.00   1. Bc2 Re1 2. Kf7 d1=Q 3. Bxd1 Rxd1
                5     0.02   0.21   1. Bc2 Bd8 2. Rb8 Rc4 3. Bd1
                5->   0.03   0.21   1. Bc2 Bd8 2. Rb8 Rc4 3. Bd1
                6     0.03   0.00   1. Bc2 Rf4+ 2. Ke7 Rf1 3. Rb8+ Kg7
                                    4. Ra8 Re1+ 5. Kd6 d1=Q+ 6. Bxd1 Rxd1+
                6->   0.09   0.00   1. Bc2 Rf4+ 2. Ke7 Rf1 3. Rb8+ Kg7
                                    4. Ra8 Re1+ 5. Kd6 d1=Q+ 6. Bxd1 Rxd1+
                7     0.19   0.00   1. Bc2 Rf4+ 2. Ke7 Rf1 3. Rb8+ Kg7
                                    4. Ra8 Re1+ 5. Kd6 d1=Q+ 6. Bxd1 Rxd1+
                7->   0.44   0.00   1. Bc2 Rf4+ 2. Ke7 Rf1 3. Rb8+ Kg7
                                    4. Ra8 Re1+ 5. Kd6 d1=Q+ 6. Bxd1 Rxd1+
                                    (s=4)
                8     0.53   0.00   1. Bc2 Rf4+ 2. Ke7 Rf1 3. Rb8+ Kg7
                                    4. Ra8 Re1+ 5. Kd6 d1=Q+ 6. Bxd1 Rxd1+
                                    7. Ke7 (s=3)
                8->   0.86   0.00   1. Bc2 Rf4+ 2. Ke7 Rf1 3. Rb8+ Kg7
                                    4. Ra8 Re1+ 5. Kd6 d1=Q+ 6. Bxd1 Rxd1+
                                    7. Ke7 (s=4)
                9     1.59   0.00   1. Bc2 Rf4+ 2. Ke7 Rf1 3. Rb8+ Kg7
                                    4. Ra8 Re1+ 5. Kd6 d1=Q+ 6. Bxd1 Rxd1+
                                    7. Ke7 Bb4+ 8. Ke8 (s=3)
                9     3.09     ++   1. d8=N!!
                9     6.80   4.35   1. d8=N Re8+ 2. Kxe8 d1=Q 3. Kf8 Bb4+
                                    4. Rxb4 Qf3+ 5. Bf5 Qh5 6. Rb5 Qg4
                9->   7.72   4.35   1. d8=N Re8+ 2. Kxe8 d1=Q 3. Kf8 Bb4+
                                    4. Rxb4 Qf3+ 5. Bf5 Qh5 6. Rb5 Qg4
               10     8.09     ++   1. d8=N!!
               10     8.23   7.05   1. d8=N Re8+ 2. Kxe8 d1=Q 3. Kf8 Qxd3
                                    4. Nf7+ Kh7 5. Ne5+ Kh6 6. Nxd3 Kg6
                                    7. Ra7 Bd8 8. Ra8
               10->  11.02   7.05   1. d8=N Re8+ 2. Kxe8 d1=Q 3. Kf8 Qxd3
                                    4. Nf7+ Kh7 5. Ne5+ Kh6 6. Nxd3 Kg6
                                    7. Ra7 Bd8 8. Ra8 (s=2)
               11    12.59   7.05   1. d8=N Re8+ 2. Kxe8 d1=Q 3. Kf8 Qxd3
                                    4. Nf7+ Kh7 5. Ne5+ Kh6 6. Nxd3 Kg6
                                    7. Ra7 Bd8 8. Ra8 Bh4
               11->  16.16   7.05   1. d8=N Re8+ 2. Kxe8 d1=Q 3. Kf8 Qxd3
                                    4. Nf7+ Kh7 5. Ne5+ Kh6 6. Nxd3 Kg6
                                    7. Ra7 Bd8 8. Ra8 Bh4 (s=2)
               12    19.89     ++   1. d8=N!!
               12    38.36  12.11   1. d8=N Re8+ 2. Kxe8 Bc7 3. Bc2 d1=Q
                                    4. Bxd1 Bf4 5. Kf7 Kh7 6. Rb5 Be5 7.
                                    Rxe5
               12->  44.41  12.11   1. d8=N Re8+ 2. Kxe8 Bc7 3. Bc2 d1=Q
                                    4. Bxd1 Bf4 5. Kf7 Kh7 6. Rb5 Be5 7.
                                    Rxe5
               13    52.77     ++   1. d8=N!!
               13     1:16  Mat22   1. d8=N Re8+ 2. Kxe8 Kg8 3. Bc4+ Kh8
                                    4. Kf8 d1=Q 5. Nf7+ Kh7 6. Bd3+ Qxd3
                                    7. Ne5+ Kh6 8. Nxd3 <HT>
               13->   1:38  Mat22   1. d8=N Re8+ 2. Kxe8 Kg8 3. Bc4+ Kh8
                                    4. Kf8 d1=Q 5. Nf7+ Kh7 6. Bd3+ Qxd3
                                    7. Ne5+ Kh6 8. Nxd3 <HT>
               14     3:19  Mat20   1. d8=N Re8+ 2. Kxe8 d1=Q 3. Kf8 Qxd3
                                    4. Nf7+ Kh7 5. Ne5+ Kh6 6. Nxd3 <EGTB>
               14->   4:00  Mat20   1. d8=N Re8+ 2. Kxe8 d1=Q 3. Kf8 Qxd3
                                    4. Nf7+ Kh7 5. Ne5+ Kh6 6. Nxd3 <EGTB>
               15     4:46  Mat20   1. d8=N Re8+ 2. Kxe8 d1=Q 3. Kf8 Qxd3
                                    4. Nf7+ Kh7 5. Ne5+ Kh6 6. Nxd3 <EGTB>

source:

http://www.chessbase.com/puzzle/games/puzz17b.htm



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