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Subject: Re: BS 2830 Problem #5 is wrong.

Author: Slater Wold

Date: 21:02:41 03/16/04

Go up one level in this thread


On March 16, 2004 at 23:55:27, Slater Wold wrote:

>On March 16, 2004 at 18:58:46, Dann Corbit wrote:
>
>>See this thread:
>>http://www.talkchess.com/forums/1/message.html?354948
>
>You asked the question "...who is right?  The GM or the computer?" & I am trying
>to determine that.
>
>At this point, I'll give the GM the benefit of the doubt, but it looks awfully
>suspicious.

Yea.  It's wrong.  Badly.  Not deep searches here, but you don't need them to
be.


EPD Kit revision date: 1996.04.21
unable to open book file [./book.bin].
book is disabled
unable to open book file [./books.bin].
hash table memory =  384M bytes.
pawn hash table memory =   96M bytes.
EGTB cache memory =   32M bytes.
6 piece tablebase files found
18165kb of RAM used for TB indices and decompression tables
book learning disabled
result learning disabled
position learning disabled
pondering disabled.

Crafty v19.11 SE [Standard]
SE code disabled

White(1): setboard 2r1r3/p3bk1p/1pn1qppB/3n4/3P2Q1/PB3N2/1P3PPP/3R2K1 w
White(1): st 60
search time set to 60.00.
White(1): Re1
              time used:  19.31
              clearing hash tables
              time surplus   0.00  time limit 1:00 (1:00)
              depth   time  score   variation (1)
                6     0.08  -0.50   1. ... Qd6 2. Bf4 f5 3. Bxd6 fxg4 4.
                                    Bxd5+ Kg7 5. Bxc6 Rxc6 6. Rxe7+ Rxe7
                                    7. Bxe7 gxf3 8. gxf3
                6->   0.08  -0.50   1. ... Qd6 2. Bf4 f5 3. Bxd6 fxg4 4.
                                    Bxd5+ Kg7 5. Bxc6 Rxc6 6. Rxe7+ Rxe7
                                    7. Bxe7 gxf3 8. gxf3
                7     0.14     ++   1. ... Qd6!!
                7     0.22  -1.07   1. ... Qd6 2. Bf4 f5 3. Bxd6 fxg4 4.
                                    Bxd5+ Kf8 5. Bxc6 Rxc6
                7->   0.23  -1.07   1. ... Qd6 2. Bf4 f5 3. Bxd6 fxg4 4.
                                    Bxd5+ Kf8 5. Bxc6 Rxc6
                8     0.40  -0.89   1. ... Qd6 2. Bf4 f5 3. Bxd6 fxg4 4.
                                    Bxd5+ Kf8 5. Bxc6 Rxc6 6. Bxe7+ Rxe7
                                    7. Ne5
                8->   0.44  -0.89   1. ... Qd6 2. Bf4 f5 3. Bxd6 fxg4 4.
                                    Bxd5+ Kf8 5. Bxc6 Rxc6 6. Bxe7+ Rxe7
                                    7. Ne5
                9     2.01  -0.79   1. ... Qd6 2. Bf4 f5 3. Bxd6 fxg4 4.
                                    Bxd5+ Kg7 5. Bxc6 Rxc6 6. Bxe7 gxf3
                                    7. gxf3
                9->   2.12  -0.79   1. ... Qd6 2. Bf4 f5 3. Bxd6 fxg4 4.
                                    Bxd5+ Kg7 5. Bxc6 Rxc6 6. Bxe7 gxf3
                                    7. gxf3
               10     4.47  -0.79   1. ... Qd6 2. Bf4 f5 3. Bxd6 fxg4 4.
                                    Bxd5+ Kg7 5. Bxc6 Rxc6 6. Bxe7 gxf3
                                    7. gxf3
               10->   4.70  -0.79   1. ... Qd6 2. Bf4 f5 3. Bxd6 fxg4 4.
                                    Bxd5+ Kg7 5. Bxc6 Rxc6 6. Bxe7 gxf3
                                    7. gxf3
               11     5.61     --   1. ... Qd6
               11    11.92   2.76   1. ... Qd6 2. Bf4 Qd8 3. Qe6+ Kg7 4.
                                    Bxd5 g5 5. Bxc6 Rxc6 6. Qxc6 gxf4 7.
                                    Re4 Kg8 8. Rxf4
               11    26.83   1.72   1. ... f5 2. Qg3 Qxe1+ 3. Nxe1 Red8
                                    4. Qd3 Bf6 5. Nc2 Na5 6. Nb4 Nxb3 7.
                                    Qxb3 Ke6 8. Be3
               11    36.64   1.07   1. ... Qf5 2. Qxf5 gxf5 3. Bxd5+ Kg6
                                    4. Bd2 Kg7 5. Be6 Rcd8 6. d5 Ne5 7.
                                    Nxe5 fxe5 8. Rxe5
               11->  37.36   1.07   1. ... Qf5 2. Qxf5 gxf5 3. Bxd5+ Kg6
                                    4. Bd2 Kg7 5. Be6 Rcd8 6. d5 Ne5 7.
                                    Nxe5 fxe5 8. Rxe5
               12    48.33   1.24   1. ... Qf5 2. Qxf5 gxf5 3. Bxd5+ Kg6
                                    4. Bc1 Kg7 5. Be6 Rcd8 6. d5 Na5 7.
                                    Nh4 Bd6 8. Nxf5+ Kg6 9. Be3
               12->  52.19   1.24   1. ... Qf5 2. Qxf5 gxf5 3. Bxd5+ Kg6
                                    4. Bc1 Kg7 5. Be6 Rcd8 6. d5 Na5 7.
                                    Nh4 Bd6 8. Nxf5+ Kg6 9. Be3
              time=1:00  cpu=98%  mat=-4  n=152347835  fh=95%  nps=2.53M
              ext-> chk=10443863 cap=555397 pp=9629 1rep=618825 mate=111598
              predicted=0  nodes=152347835  evals=21636778  50move=1
              endgame tablebase-> probes=0  hits=0
              hashing-> 28%(raw) 23%(depth)  62%(sat)  99%(pawn)
              hashing-> 0%(exact)  9%(lower)  3%(upper)

Black(1): Qf5
              time used:   1:00
White(2): undo
NOTICE: 60 moves to next time control
Black(1): Qd6
              time used:   5.78
              clearing hash tables
              time surplus   0.00  time limit 1:00 (1:00)
              depth   time  score   variation (1)
                6     0.06  -1.07   2. Bf4 f5 3. Bxd6 fxg4 4. Bxd5+ Kf8
                                    5. Bxc6 Rxc6
                6->   0.11  -1.07   2. Bf4 f5 3. Bxd6 fxg4 4. Bxd5+ Kf8
                                    5. Bxc6 Rxc6
                7     0.16  -0.89   2. Bf4 f5 3. Bxd6 fxg4 4. Bxd5+ Kf8
                                    5. Bxc6 Rxc6 6. Bxe7+ Rxe7 7. Ne5
                7->   0.26  -0.89   2. Bf4 f5 3. Bxd6 fxg4 4. Bxd5+ Kf8
                                    5. Bxc6 Rxc6 6. Bxe7+ Rxe7 7. Ne5
                8     0.37  -0.79   2. Bf4 f5 3. Bxd6 fxg4 4. Bxd5+ Kg7
                                    5. Bxc6 Rxc6 6. Bxe7 gxf3 7. gxf3
                8->   0.97  -0.79   2. Bf4 f5 3. Bxd6 fxg4 4. Bxd5+ Kg7
                                    5. Bxc6 Rxc6 6. Bxe7 gxf3 7. gxf3
                9     1.26  -0.79   2. Bf4 f5 3. Bxd6 fxg4 4. Bxd5+ Kg7
                                    5. Bxc6 Rxc6 6. Bxe7 gxf3 7. gxf3
                9->   2.61  -0.79   2. Bf4 f5 3. Bxd6 fxg4 4. Bxd5+ Kg7
                                    5. Bxc6 Rxc6 6. Bxe7 gxf3 7. gxf3
               10     3.31     ++   2. Bf4!!
               10     5.17   2.73   2. Bf4 Qd8 3. Qe6+ Kg7 4. Bxd5 g5 5.
                                    Bxc6 Rxc6 6. Nxg5 Rxe6 7. Nxe6+ Kf7
                                    8. Nxd8+ Bxd8
               10->   6.66   2.73   2. Bf4 Qd8 3. Qe6+ Kg7 4. Bxd5 g5 5.
                                    Bxc6 Rxc6 6. Nxg5 Rxe6 7. Nxe6+ Kf7
                                    8. Nxd8+ Bxd8
               11     8.78     --   2. Bf4
               11    10.11   1.37   2. Bf4 h5 3. Qxc8 Rxc8 4. Bxd6 Bxd6
                                    5. Bxd5+ Kg7 6. Rc1 Ne7 7. Rxc8 Nxc8
                                    8. Be6
               11->  15.28   1.37   2. Bf4 h5 3. Qxc8 Rxc8 4. Bxd6 Bxd6
                                    5. Bxd5+ Kg7 6. Rc1 Ne7 7. Rxc8 Nxc8
                                    8. Be6
               12    17.69   1.41   2. Bf4 h5 3. Qxc8 Rxc8 4. Bxd6 Bxd6
                                    5. Bxd5+ Kg7 6. Be6 Re8 7. d5 Ne7 8.
                                    Nd4
               12->  30.87   1.41   2. Bf4 h5 3. Qxc8 Rxc8 4. Bxd6 Bxd6
                                    5. Bxd5+ Kg7 6. Be6 Re8 7. d5 Ne7 8.
                                    Nd4
               13    37.14   1.42   2. Bf4 h5 3. Qxc8 Rxc8 4. Bxd6 Bxd6
                                    5. Bxd5+ Kg7 6. Rc1 Ne7 7. Rxc8 Nxc8
                                    8. Be6 Ne7 9. Kf1
              time=1:00  cpu=99%  mat=-4  n=162527124  fh=97%  nps=2.70M
              ext-> chk=12658762 cap=573261 pp=13236 1rep=719157 mate=80198
              predicted=0  nodes=162527124  evals=10735063  50move=2
              endgame tablebase-> probes=0  hits=0
              hashing-> 35%(raw) 27%(depth)  66%(sat)  99%(pawn)
              hashing-> 0%(exact)  12%(lower)  4%(upper)

White(2): Bf4
              time used:   1:00
Black(2): Qd8
              time used:   5.75
              time surplus   0.00  time limit 1:00 (1:00)
              depth   time  score   variation (1)
                7->   0.05   2.74   3. Qe6+ Kg7 4. Bxd5 g5 5. Bxc6 Rxc6
                                    6. Nxg5 Rxe6 7. Nxe6+ Kf7 8. Nxd8+
                                    Bxd8 9. Rd1 <HT>
                8     0.05   2.74   3. Qe6+ Kg7 4. Bxd5 g5 5. Bxc6 Rxc6
                                    6. Nxg5 Rxe6 7. Nxe6+ Kf7 8. Nxd8+
                                    Bxd8 9. Rd1 <HT>
                8->   0.10   2.74   3. Qe6+ Kg7 4. Bxd5 g5 5. Bxc6 Rxc6
                                    6. Nxg5 Rxe6 7. Nxe6+ Kf7 8. Nxd8+
                                    Bxd8 9. Rd1 <HT>
                9     0.17     ++   3. Qe6+!!
                9     1.07   5.70   3. Qe6+ Kg7 4. Bxd5 Rg8 5. Bxc6 Bd6
                                    6. Bxd6 Rxc6 7. Bf8+ Rxf8 8. Qxc6
                9->   1.36   5.70   3. Qe6+ Kg7 4. Bxd5 Rg8 5. Bxc6 Bd6
                                    6. Bxd6 Rxc6 7. Bf8+ Rxf8 8. Qxc6
               10     1.78   5.63   3. Qe6+ Kg7 4. Bxd5 Rg8 5. Bxc6 Bd6
                                    6. Bxd6 Rxc6 7. Bf8+ Rxf8 8. Qxc6 a6
               10->   2.99   5.63   3. Qe6+ Kg7 4. Bxd5 Rg8 5. Bxc6 Bd6
                                    6. Bxd6 Rxc6 7. Bf8+ Rxf8 8. Qxc6 a6
               11     4.07   5.95   3. Qe6+ Kg7 4. Bxd5 Rg8 5. Bxc6 Bd6
                                    6. Bxd6 Rxc6 7. Bf8+ Rxf8 8. Qxc6 a5
                                    9. d5
               11->   6.00   5.95   3. Qe6+ Kg7 4. Bxd5 Rg8 5. Bxc6 Bd6
                                    6. Bxd6 Rxc6 7. Bf8+ Rxf8 8. Qxc6 a5
                                    9. d5
               12     8.50   6.13   3. Qe6+ Kg7 4. Bxd5 Rg8 5. Bxc6 Bd6
                                    6. Ng5 fxg5 7. Bxd6 Kh8 8. Be5+ Rg7
                                    9. Bf6 Qc7
               12->  13.89   6.13   3. Qe6+ Kg7 4. Bxd5 Rg8 5. Bxc6 Bd6
                                    6. Ng5 fxg5 7. Bxd6 Kh8 8. Be5+ Rg7
                                    9. Bf6 Qc7
               13    22.32   6.07   3. Qe6+ Kg7 4. Bxd5 Kh8 5. Bxc6 Bd6
                                    6. Bxe8 Bxf4 7. Qf7 Qd6 8. Qxa7 Rc2
                                    9. b4 Kg8
               13->  38.80   6.07   3. Qe6+ Kg7 4. Bxd5 Kh8 5. Bxc6 Bd6
                                    6. Bxe8 Bxf4 7. Qf7 Qd6 8. Qxa7 Rc2
                                    9. b4 Kg8
               14    44.63     ++   3. Qe6+!!
              time=1:00  cpu=99%  mat=-4  n=158222109  fh=97%  nps=2.63M
              ext-> chk=13454685 cap=372330 pp=9615 1rep=1277545 mate=71372
              predicted=0  nodes=158222109  evals=10596998  50move=4
              endgame tablebase-> probes=0  hits=0
              hashing-> 28%(raw) 20%(depth)  70%(sat)  99%(pawn)
              hashing-> 0%(exact)  13%(lower)  3%(upper)

White(3): Qe6+
              time used:   1:00
Black(3): Kg7
              time used:   6.39
              time surplus   0.00  time limit 1:00 (1:00)
              depth   time  score   variation (1)
                7     0.04   6.07   4. Bxd5 Kh8 5. Bxc6 Bd6 6. Bxe8 <HT>
                7->   0.04   6.07   4. Bxd5 Kh8 5. Bxc6 Bd6 6. Bxe8 <HT>
                8     0.04     ++   4. Bxd5!!
                8->   0.04   6.46   4. Bxd5 Kh8 5. Bxc6 Bd6 6. Bxe8 <HT>
                9     0.06   6.07   4. Bxd5 Kh8 5. Bxc6 Bd6 6. Bxe8 <HT>
                9->   0.06   6.07   4. Bxd5 Kh8 5. Bxc6 Bd6 6. Bxe8 <HT>
               10     0.06     ++   4. Bxd5!!
               10->   0.06   6.46   4. Bxd5 Kh8 5. Bxc6 Bd6 6. Bxe8 <HT>
               11     0.08   6.07   4. Bxd5 Kh8 5. Bxc6 Bd6 6. Bxe8 <HT>
               11->   0.09   6.07   4. Bxd5 Kh8 5. Bxc6 Bd6 6. Bxe8 <HT>
               12     0.11     ++   4. Bxd5!!
               12->   0.12   6.46   4. Bxd5 Kh8 5. Bxc6 Bd6 6. Bxe8 <HT>
               13    10.12   6.50   4. Bxd5 Kh8 5. Bxc6 Rg8 6. Bd7 Rc2
                                    7. Qxe7 Qxe7 8. Rxe7 Rxb2 9. d5 g5
                                    10. Bc7 Rc2
               13->  15.04   6.50   4. Bxd5 Kh8 5. Bxc6 Rg8 6. Bd7 Rc2
                                    7. Qxe7 Qxe7 8. Rxe7 Rxb2 9. d5 g5
                                    10. Bc7 Rc2
              time=1:00  cpu=99%  mat=-4  n=152218426  fh=94%  nps=2.53M
              ext-> chk=8700186 cap=325802 pp=29984 1rep=921528 mate=133721
              predicted=0  nodes=152218426  evals=25656101  50move=6
              endgame tablebase-> probes=0  hits=0
              hashing-> 29%(raw) 25%(depth)  64%(sat)  99%(pawn)
              hashing-> 0%(exact)  12%(lower)  2%(upper)

White(4): Bxd5
              time used:   1:00
Black(4): g5
              time used:   3.73
              time surplus   0.00  time limit 1:00 (1:00)
              depth   time  score   variation (1)
                7     0.36  Mat06   5. Qf7+ Kh6 6. Bxg5+ fxg5 7. Re6+ Bf6
                                    8. Rxf6+ Qxf6 9. Qxf6+ <HT>
                7->   0.38  Mat06   5. Qf7+ Kh6 6. Bxg5+ fxg5 7. Re6+ Bf6
                                    8. Rxf6+ Qxf6 9. Qxf6+ <HT>
                8     1.61  Mat06   5. Qf7+ Kh6 6. Bxg5+ fxg5 7. Re6+ Bf6
                                    8. Rxf6+ Qxf6 9. Qxf6+ <HT>
                8->   1.70  Mat06   5. Qf7+ Kh6 6. Bxg5+ fxg5 7. Re6+ Bf6
                                    8. Rxf6+ Qxf6 9. Qxf6+ <HT>
                9     7.33  Mat06   5. Qf7+ Kh6 6. Bxg5+ fxg5 7. Re6+ Bf6
                                    8. Rxf6+ Qxf6 9. Qxf6+ <HT>
                9->   7.58  Mat06   5. Qf7+ Kh6 6. Bxg5+ fxg5 7. Re6+ Bf6
                                    8. Rxf6+ Qxf6 9. Qxf6+ <HT>
               10    53.80  Mat06   5. Qf7+ Kh6 6. Bxg5+ fxg5 7. Re6+ Bf6
                                    8. Rxf6+ Qxf6 <HT>
               10->  54.59  Mat06   5. Qf7+ Kh6 6. Bxg5+ fxg5 7. Re6+ Bf6
                                    8. Rxf6+ Qxf6 <HT>
              time=1:00  cpu=98%  mat=-1  n=160662266  fh=99%  nps=2.67M
              ext-> chk=16771063 cap=163514 pp=144649 1rep=2568645 mate=10108
              predicted=0  nodes=160662266  evals=5454  50move=0
              endgame tablebase-> probes=0  hits=0
              hashing-> 21%(raw) 13%(depth)  80%(sat)  99%(pawn)
              hashing-> 0%(exact)  10%(lower)  1%(upper)



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