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Subject: Re: Testposition: easy for human, hard for computers!

Author: Slater Wold

Date: 20:12:54 03/31/04

Go up one level in this thread


On March 31, 2004 at 09:13:59, Eduard Nemeth wrote:

>Composition Eduard Nemeth
>
>[D]4nBRR/4P1PP/3pKn2/8/4P3/8/6k1/8 b - - 0 1
>
>Black wins.

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 =  192M bytes.
pawn hash table memory =   48M bytes.
EGTB cache memory =   16M 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): st 99999
search time set to 99999.00.
White(1): setboard 4nBRR/4P1PP/3pKn2/8/4P3/8/6k1/8 b - - 0 1
Black(1): go
end-game phase
              clearing hash tables
              time surplus   0.00  time limit 1666:39 (1666:39)
              depth   time  score   variation (1)
               10     0.05  16.34   1. ... Kf3 2. e5 dxe5 3. Kxe5 Nh5 4.
                                    Ke6 Nf4+ 5. Kf7 Nd6+ 6. Kf6 Ne8+ 7.
                                    Kf5 Ke3 8. Kg4 Nd3 <HT>
               10->   0.06  16.34   1. ... Kf3 2. e5 dxe5 3. Kxe5 Nh5 4.
                                    Ke6 Nf4+ 5. Kf7 Nd6+ 6. Kf6 Ne8+ 7.
                                    Kf5 Ke3 8. Kg4 Nd3 <HT>
               11     0.09  16.33   1. ... Kf3 2. e5 dxe5 3. Kxe5 Nh5 4.
                                    Ke6 Nf4+ 5. Kf7 Nd6+ 6. Kf6 Ne8+ 7.
                                    Kf5 Ke3 8. Kg5 Ne6+ 9. Kg4 N6xg7 10.
                                    Bxg7
               11->   0.14  16.33   1. ... Kf3 2. e5 dxe5 3. Kxe5 Nh5 4.
                                    Ke6 Nf4+ 5. Kf7 Nd6+ 6. Kf6 Ne8+ 7.
                                    Kf5 Ke3 8. Kg5 Ne6+ 9. Kg4 N6xg7 10.
                                    Bxg7
               12     0.17  16.33   1. ... Kf3 2. e5 dxe5 3. Kxe5 Nh5 4.
                                    Ke6 Nf4+ 5. Kf7 Nd6+ 6. Kf6 Ne8+ 7.
                                    Kf5 Ke3 8. Kg5 Ne6+ 9. Kg4 N6xg7 10.
                                    Bxg7
               12     0.25     ++   1. ... Nxe4!!
               12     0.28  14.75   1. ... Nxe4 2. Kf7 N4f6 3. Kg6 Kf3
                                    4. Kh6 d5 5. Kg5 d4 6. Kg6 Nxh7 7.
                                    Kxh7
               12->   0.30  14.75   1. ... Nxe4 2. Kf7 N4f6 3. Kg6 Kf3
                                    4. Kh6 d5 5. Kg5 d4 6. Kg6 Nxh7 7.
                                    Kxh7
               13     0.34  14.40   1. ... Nxe4 2. Kf7 N4f6 3. Kg6 Kf3
                                    4. Kh6 Ke3 5. Kg5 d5 6. Kg6 Nxh7 7.
                                    Kxh7 d4
               13->   0.41  14.40   1. ... Nxe4 2. Kf7 N4f6 3. Kg6 Kf3
                                    4. Kh6 Ke3 5. Kg5 d5 6. Kg6 Nxh7 7.
                                    Kxh7 d4
               14     0.44  14.41   1. ... Nxe4 2. Kf7 N4f6 3. Kg6 Kf3
                                    4. Kh6 Ke3 5. Kg5 Ke4 6. Kh4 d5 7.
                                    Kg3 Nxh7 8. Rxh7
               14->   0.53  14.41   1. ... Nxe4 2. Kf7 N4f6 3. Kg6 Kf3
                                    4. Kh6 Ke3 5. Kg5 Ke4 6. Kh4 d5 7.
                                    Kg3 Nxh7 8. Rxh7
               15     0.72     ++   1. ... Nxe4!!
               15->   1.11  14.02   1. ... Nxe4 2. Kf7 N4f6 3. Kg6 Kf3
                                    4. Kh6 Ke3 5. Kg5 Ke4 6. Kh4 d5 7.
                                    Kg3 Nxh7 8. Rxh7
               16     1.67  13.67   1. ... Nxe4 2. Kd7 N4f6+ 3. Kc6 Ne4
                                    4. Kb6 Ng5 5. Kb5 Kf3 6. Kc6 Ke4 7.
                                    Kd7 Nf6+ 8. Kxd6 Kf5 9. Kc5 Kg6 10.
                                    e8=Q+ Nxe8
               16->   1.98  13.67   1. ... Nxe4 2. Kd7 N4f6+ 3. Kc6 Ne4
                                    4. Kb6 Ng5 5. Kb5 Kf3 6. Kc6 Ke4 7.
                                    Kd7 Nf6+ 8. Kxd6 Kf5 9. Kc5 Kg6 10.
                                    e8=Q+ Nxe8
               17     2.78  13.56   1. ... Nxe4 2. Kd7 N4f6+ 3. Kc6 Ne4
                                    4. Kb6 Kf3 5. Kb7 d5 6. Kc8 N4f6 7.
                                    Kb8 d4 8. Kb7 Ke3 <HT>
               17->   3.47  13.56   1. ... Nxe4 2. Kd7 N4f6+ 3. Kc6 Ne4
                                    4. Kb6 Kf3 5. Kb7 d5 6. Kc8 N4f6 7.
                                    Kb8 d4 8. Kb7 Ke3 <HT>
               18     4.25     ++   1. ... Nxe4!!
               18->   6.94  13.17   1. ... Nxe4 2. Kd7 N4f6+ 3. Kc6 Ne4
                                    4. Kb6 Kf3 5. Kb7 d5 6. Kc8 N4f6 7.
                                    Kb8 d4 8. Kb7 Ke3 <HT>
               19     7.48     ++   1. ... Nxe4!!
               19->  12.31  12.78   1. ... Nxe4 2. Kd7 N4f6+ 3. Kc6 Ne4
                                    4. Kb6 Kf3 5. Kb7 d5 6. Kc8 N4f6 7.
                                    Kb8 d4 8. Kb7 Ke3 9. Kc6 <HT>
               20    13.38     ++   1. ... Nxe4!!
               20->  20.11  12.39   1. ... Nxe4 2. Kd7 N4f6+ 3. Kc6 Ne4
                                    4. Kb6 Kf3 5. Kb7 d5 6. Kc8 N4f6 7.
                                    Kb8 d4 8. Kb7 Ke3 9. Kc6 <HT>
               21    21.00     ++   1. ... Nxe4!!
               21->  56.77  12.00   1. ... Nxe4 2. Kd7 N4f6+ 3. Kc6 Ne4
                                    4. Kb6 Kf3 5. Kb7 d5 6. Kc8 N4f6 7.
                                    Kb8 d4 8. Kb7 Ke3 9. Kc6 d3 <HT>
               22    57.67     ++   1. ... Nxe4!!
               22     1:12  -0.01   1. ... Nxe4 2. Kd7 N4f6+ 3. Ke6 Ne4
               22->   1:13  -0.01   1. ... Nxe4 2. Kd7 N4f6+ 3. Ke6 Ne4
               23     1:13  -0.01   1. ... Nxe4 2. Kd7 N4f6+ 3. Ke6 Ne4
               23->   1:16  -0.01   1. ... Nxe4 2. Kd7 N4f6+ 3. Ke6 Ne4
               24     1:26  -0.01   1. ... Nxe4 2. Kd5 N4f6+ 3. Kd4 Kf3
                                    4. Kd3 d5 5. Kd4 Ke2 6. Ke5 Kf3 <HT>
               24->   1:32  -0.01   1. ... Nxe4 2. Kd5 N4f6+ 3. Kd4 Kf3
                                    4. Kd3 d5 5. Kd4 Ke2 6. Ke5 Kf3 <HT>
               25     1:37  -0.01   1. ... Nxe4 2. Kd5 N4f6+ 3. Kd4 Kf3
                                    4. Kd3 d5 5. Kd4 Ke2 6. Ke5 Kf3 <HT>
               25->   1:47  -0.01   1. ... Nxe4 2. Kd5 N4f6+ 3. Kd4 Kf3
                                    4. Kd3 d5 5. Kd4 Ke2 6. Ke5 Kf3 <HT>
               26     1:57  -0.01   1. ... Nxe4 2. Kd5 N4f6+ 3. Kd4 Kf3
                                    4. Kd3 d5 5. Kd4 Ke2 6. Ke5 Kf3 7.
                                    Kd4
               26->   2:12  -0.01   1. ... Nxe4 2. Kd5 N4f6+ 3. Kd4 Kf3
                                    4. Kd3 d5 5. Kd4 Ke2 6. Ke5 Kf3 7.
                                    Kd4
               27     2:30  -0.01   1. ... Nxe4 2. Kd5 N4f6+ 3. Kd4 Kf3
                                    4. Kd3 d5 5. Kd2 Kg2 6. Kd3 Kf3
               27->   3:07  -0.01   1. ... Nxe4 2. Kd5 N4f6+ 3. Kd4 Kf3
                                    4. Kd3 d5 5. Kd2 Kg2 6. Kd3 Kf3
               28     3:26  -0.01   1. ... Nxe4 2. Kd5 N4f6+ 3. Kd4 Kf3
                                    4. Kd3 d5 5. Kd2 Kg2 6. Kd3 Kf3
               28->   4:20  -0.01   1. ... Nxe4 2. Kd5 N4f6+ 3. Kd4 Kf3
                                    4. Kd3 d5 5. Kd2 Kg2 6. Kd3 Kf3
               29     4:33     ++   1. ... Nxe4!!
               29     5:12 -Mat18   1. ... Nxe4 2. Kd5 Kf3 3. Kd4 Nf2 4.
                                    Kc4 Ke3 5. Kd5 Ne4 6. Kc6 N4f6 7. Kb6
                                    d5 8. Kc5 d4 9. Kc4 d3 10. Kc3 d2 11.
                                    Kc2 Ne4 12. Kd1 Nf2+ 13. Kc2 d1=Q+
                                    14. Kc3 Nd3 15. Kc4 Qa4+ 16. Kc3 Qa3+
                                    17. Kc4 Qb4+ 18. Kd5 Qe4#
               29->   7:57 -Mat18   1. ... Nxe4 2. Kd5 Kf3 3. Kd4 Nf2 4.
                                    Kc4 Ke3 5. Kd5 Ne4 6. Kc6 N4f6 7. Kb6
                                    d5 8. Kc5 d4 9. Kc4 d3 10. Kc3 d2 11.
                                    Kc2 Ne4 12. Kd1 Nf2+ 13. Kc2 d1=Q+
                                    14. Kc3 Nd3 15. Kc4 Qa4+ 16. Kc3 Qa3+
                                    17. Kc4 Qb4+ 18. Kd5 Qe4#
               30    13:08 -Mat18   1. ... Nxe4 2. Kd5 Kf3 3. Kd4 Nf2 4.
                                    Kc4 Ke3 5. Kd5 Ne4 6. Kc6 N4f6 7. Kb6
                                    d5 8. Kc5 d4 9. Kc4 d3 10. Kc3 d2 11.
                                    Kc2 Ne4 12. Kd1 Nf2+ 13. Kc2 d1=Q+
                                    14. Kc3 Nd3 15. Kc4 Qa4+ 16. Kc3 Qa3+
                                    17. Kc4 Qb4+ 18. Kd5 Qe4#
               30->  15:43 -Mat18   1. ... Nxe4 2. Kd5 Kf3 3. Kd4 Nf2 4.
                                    Kc4 Ke3 5. Kd5 Ne4 6. Kc6 N4f6 7. Kb6
                                    d5 8. Kc5 d4 9. Kc4 d3 10. Kc3 d2 11.
                                    Kc2 Ne4 12. Kd1 Nf2+ 13. Kc2 d1=Q+
                                    14. Kc3 Nd3 15. Kc4 Qa4+ 16. Kc3 Qa3+
                                    17. Kc4 Qb4+ 18. Kd5 Qe4#
               31    21:49 -Mat18   1. ... Nxe4 2. Kd5 Kf3 3. Kd4 Nf2 4.
                                    Kc4 Ke3 5. Kd5 Ne4 6. Kc6 N4f6 7. Kb6
                                    d5 8. Kc5 d4 9. Kc4 d3 10. Kc3 d2 11.
                                    Kc2 Ne4 12. Kd1 Nf2+ 13. Kc2 d1=Q+
                                    14. Kc3 Nd3 15. Kc4 Qa4+ 16. Kc3 Qa3+
                                    17. Kc4 Qb4+ 18. Kd5 Qe4#
?              31    22:15   2/18*  1. ... Nxg8
Black(0): ?
              time=22:20  cpu=84%  mat=10  n=3273927545  fh=98%  nps=2.44M
              ext-> chk=387487208 cap=1346677 pp=571486 1rep=23201426 mate=37832
3
              predicted=0  nodes=3273927545  evals=144106741  50move=0
              endgame tablebase-> probes=1300294  hits=124503
              hashing-> 56%(raw) 56%(depth)  99%(sat)  99%(pawn)
              hashing-> 0%(exact)  47%(lower)  2%(upper)



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