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Subject: Re: longest fail low ever?

Author: Slater Wold

Date: 16:32:45 12/12/03

Go up one level in this thread


On December 12, 2003 at 15:13:40, Will Singleton wrote:

>On December 12, 2003 at 13:49:35, Robert Hyatt wrote:
>
>>On December 12, 2003 at 13:40:07, Will Singleton wrote:
>>
>>>Here's a position from a recent game, this one gives Amateur fits.
>>>How long to see black is busted?
>>>
>>>[d]4rr2/1b3p1k/pp5p/2b1pQ2/q7/P2R2B1/1PP3PP/2KR4 b - -
>>
>>
>>For Crafty, the bottom begins to fall out at 6 seconds or so, where
>>it begins to see it is not ahead.  By 60 seconds it has failed low
>>to white a pawn up and climbing:
>>
>>               12->   4.84  -0.69   1. ... Kg8 2. Bxe5 Bf2 3. Rd4 Rxe5
>>                                    4. Qxe5 Re8 5. Rd8 Bc6 6. Rxe8+ Bxe8
>>                                    7. Rd6 Qb5 8. Qf4 Qg5 <HT>
>>               13     6.66     --   1. ... Kg8
>>               13    15.28   0.31   1. ... Kg8 2. Bxe5 Bf2 3. Bf6 Re2 4.
>>                                    Rd8 Bc5 5. R8d4 Rxc2+ 6. Qxc2 Qxc2+
>>                                    7. Kxc2 Bxd4 8. Bxd4 Be4+ 9. Kb3 Rd8
>>               13->  17.91   0.31   1. ... Kg8 2. Bxe5 Bf2 3. Bf6 Re2 4.
>>                                    Rd8 Bc5 5. R8d4 Rxc2+ 6. Qxc2 Qxc2+
>>                                    7. Kxc2 Bxd4 8. Bxd4 Be4+ 9. Kb3 Rd8
>>               14    35.70   0.00   1. ... Kg8 2. Bxe5 Bf2 3. Bf6 Re2 4.
>>                                    Rd8 Bh4 5. Rxf8+ Kxf8 6. Rd8+ Re8 7.
>>                                    Rxe8+ Qxe8 8. Bxh4 Qe3+ 9. Kb1 Qg1+
>>                                    10. Ka2 Qxg2 11. Qf4 Qxc2 12. Qxh6+
>>               14->  40.01   0.00   1. ... Kg8 2. Bxe5 Bf2 3. Bf6 Re2 4.
>>                                    Rd8 Bh4 5. Rxf8+ Kxf8 6. Rd8+ Re8 7.
>>                                    Rxe8+ Qxe8 8. Bxh4 Qe3+ 9. Kb1 Qg1+
>>                                    10. Ka2 Qxg2 11. Qf4 Qxc2 12. Qxh6+
>>               15    51.44     --   1. ... Kg8
>>               15     1:30   0.98   1. ... Kg8 2. Bxe5 Bf2 3. Rd4 Rxe5
>>                                    4. Qxe5 Re8 5. Rg4+ Qxg4 6. Qxe8+ Kg7
>>                                    7. Qe5+ f6 8. Qc7+ Kg6 9. Rd7 Qg5+
>>                                    10. Kb1 Bxg2 11. Rg7+ Kf5 12. Rxg5+
>>                                    hxg5
>
>That's only half the story.  Let it think another half hour.
>
>Will

White(1): setboard 4rr2/1b3p1k/pp5p/2b1pQ2/q7/P2R2B1/1PP3PP/2KR4 b - -
Black(1): st 9999999
search time set to 9999999.00.
Black(1): go
              clearing hash tables
              time surplus   0.00  time limit 166666:39 (166666:39)
              depth   time  score   variation (1)
starting thread 1
                7     0.14  -1.34   1. ... Kg8 2. Bxe5 Bf2 3. Kb1 Rxe5
                                    4. Qxe5 Bxg2
                7->   0.14  -1.34   1. ... Kg8 2. Bxe5 Bf2 3. Kb1 Rxe5
                                    4. Qxe5 Bxg2
                8     0.23     --   1. ... Kg8
                8     0.34  -0.89   1. ... Kg8 2. Bxe5 Bf2 3. Rh3 Qe4 4.
                                    Qxf2 Rxe5 5. Rxh6 Qxg2 6. Qxb6
                8->   0.36  -0.89   1. ... Kg8 2. Bxe5 Bf2 3. Rh3 Qe4 4.
                                    Qxf2 Rxe5 5. Rxh6 Qxg2 6. Qxb6
                9     0.95  -1.12   1. ... Kg8 2. Bxe5 Bf2 3. Qf6 Rxe5
                                    4. Qxe5 Re8 5. Rd8 Rxd8 6. Rxd8+
                9->   0.98  -1.12   1. ... Kg8 2. Bxe5 Bf2 3. Qf6 Rxe5
                                    4. Qxe5 Re8 5. Rd8 Rxd8 6. Rxd8+
               10     1.83  -0.97   1. ... Kg8 2. Bxe5 Bf2 3. Qf6 Rxe5
                                    4. Qxe5 Re8 5. Qc7 Bxg2 6. Rd7
               10->   1.90  -0.97   1. ... Kg8 2. Bxe5 Bf2 3. Qf6 Rxe5
                                    4. Qxe5 Re8 5. Qc7 Bxg2 6. Rd7
               11     7.12  -0.84   1. ... Kg8 2. Bxe5 Bf2 3. Qf6 Rxe5
                                    4. Qxe5 Qg4 5. g3 Qg5+ 6. Qxg5+ hxg5
                                    7. Rf1 Bc5 8. Rd7
               11->   7.72  -0.84   1. ... Kg8 2. Bxe5 Bf2 3. Qf6 Rxe5
                                    4. Qxe5 Qg4 5. g3 Qg5+ 6. Qxg5+ hxg5
                                    7. Rf1 Bc5 8. Rd7
               12    13.15     --   1. ... Kg8
               12    18.67  -0.43   1. ... Kg8 2. Bxe5 Bf2 3. Rd4 Rxe5
                                    4. Qxe5 Re8 5. Rd8 Bc6 6. Rxe8+ Bxe8
                                    7. Rd8 Kf8 8. Kd2
               12->  20.06  -0.43   1. ... Kg8 2. Bxe5 Bf2 3. Rd4 Rxe5
                                    4. Qxe5 Re8 5. Rd8 Bc6 6. Rxe8+ Bxe8
                                    7. Rd8 Kf8 8. Kd2
               13    28.70     --   1. ... Kg8
               13     1:02   0.31   1. ... Kg8 2. Bxe5 Bf2 3. Bf6 Re2 4.
                                    Rd8 Bc5 5. R8d4 Rxc2+ 6. Qxc2 Qxc2+
                                    7. Kxc2 Bxd4 8. Bxd4 Be4+ 9. Kb3 Rd8
               13->   1:08   0.31   1. ... Kg8 2. Bxe5 Bf2 3. Bf6 Re2 4.
                                    Rd8 Bc5 5. R8d4 Rxc2+ 6. Qxc2 Qxc2+
                                    7. Kxc2 Bxd4 8. Bxd4 Be4+ 9. Kb3 Rd8
               14     2:21   0.00   1. ... Kg8 2. Bxe5 Bf2 3. Bf6 Re2 4.
                                    Rd8 Bh4 5. Rxf8+ Kxf8 6. Rd8+ Re8 7.
                                    Rxe8+ Qxe8 8. Bxh4 Qe3+ 9. Kb1 Qg1+
                                    10. Ka2 Qxg2 11. Qf4 Qxc2 12. Qxh6+
               14->   2:34   0.00   1. ... Kg8 2. Bxe5 Bf2 3. Bf6 Re2 4.
                                    Rd8 Bh4 5. Rxf8+ Kxf8 6. Rd8+ Re8 7.
                                    Rxe8+ Qxe8 8. Bxh4 Qe3+ 9. Kb1 Qg1+
                                    10. Ka2 Qxg2 11. Qf4 Qxc2 12. Qxh6+
               15     3:35     --   1. ... Kg8
               15     6:51   0.98   1. ... Kg8 2. Bxe5 Bf2 3. Rd4 Rxe5
                                    4. Qxe5 Re8 5. Rg4+ Qxg4 6. Qxe8+ Kg7
                                    7. Qe5+ f6 8. Qc7+ Kg6 9. Rd7 Qg5+
                                    10. Kb1 Bxg2 11. Rg7+ Kf5 12. Rxg5+
                                    hxg5
               15->  31:42   0.98   1. ... Kg8 2. Bxe5 Bf2 3. Rd4 Rxe5
                                    4. Qxe5 Re8 5. Rg4+ Qxg4 6. Qxe8+ Kg7
                                    7. Qe5+ f6 8. Qc7+ Kg6 9. Rd7 Qg5+
                                    10. Kb1 Bxg2 11. Rg7+ Kf5 12. Rxg5+
                                    hxg5 (s=2)
               16    32:56     --   1. ... Kg8
?              16   193:15    1/3*  1. ... Kg8
Black(0): ?
              time=193:18  cpu=197%  mat=-3  n=20834682079  fh=99%  nps=1796k
              ext-> chk=-1921721336 cap=10974209 pp=1617516 1rep=423412478 mate=
1390210
              predicted=0  nodes=20834682079  evals=670369456
              endgame tablebase-> probes=0  hits=0
              SMP->  split=3793  stop=417  data=12/4096  cpu=382:29  elap=193:18



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