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Subject: Re: Is this a forced mate..?

Author: Slater Wold

Date: 07:56:32 02/28/04

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On February 28, 2004 at 10:27:51, Art Basham wrote:

>[D]r1bq2kr/p1pp1ppp/1pn1p3/4P3/2Pb2Q1/BR6/P4PPP/3K1BNR w - - 0 1
>
>Hi..
>I was wondering if any programs out there announce mate at move 1...
>beginning with Qxg7+...?
>
>My programs find Qxg7 but do not ann. a mate...etc
>thanks!
>Art

Crafty v19.11

White(1): hash 100M
hash table memory =   96M bytes.
White(1): hashp 24M
pawn hash table memory =   24M bytes.
White(1): easy
pondering disabled.
White(1): st 99999
search time set to 99999.00.
White(1): setboard r1bq2kr/p1pp1ppp/1pn1p3/4P3/2Pb2Q1/BR6/P4PPP/3K1BNR w - - 0 1

White(1): go
              clearing hash tables
              time surplus   0.00  time limit 1666:39 (1666:39)
              depth   time  score   variation (1)
                7     0.04   1.14   1. Qxg7+ Kxg7 2. Rg3+ Qg5 3. Rxg5+
                                    Kh6 4. Bc1 Bb2 5. Rg8+ Bxc1 6. Rxh8
                                    Bf4 7. Bd3
                7->   0.06   1.14   1. Qxg7+ Kxg7 2. Rg3+ Qg5 3. Rxg5+
                                    Kh6 4. Bc1 Bb2 5. Rg8+ Bxc1 6. Rxh8
                                    Bf4 7. Bd3
                8     0.06     ++   1. Qxg7+!!
                8     0.12   3.73   1. Qxg7+ Kxg7 2. Rg3+ Qg5 3. Rxg5+
                                    Kh6 4. Rg3 Be3 5. Rxe3 Rd8 6. Rh3+
                                    Kg7 7. Rg3+ Kh8 8. Nf3
                8->   0.14   3.73   1. Qxg7+ Kxg7 2. Rg3+ Qg5 3. Rxg5+
                                    Kh6 4. Rg3 Be3 5. Rxe3 Rd8 6. Rh3+
                                    Kg7 7. Rg3+ Kh8 8. Nf3
                9     0.20   3.96   1. Qxg7+ Kxg7 2. Rg3+ Qg5 3. Rxg5+
                                    Kh6 4. Rg3 Be3 5. Rxe3 Rd8 6. Rh3+
                                    Kg7 7. Bd3 h6 8. Nf3
                9->   0.23   3.96   1. Qxg7+ Kxg7 2. Rg3+ Qg5 3. Rxg5+
                                    Kh6 4. Rg3 Be3 5. Rxe3 Rd8 6. Rh3+
                                    Kg7 7. Bd3 h6 8. Nf3
               10     0.45   4.10   1. Qxg7+ Kxg7 2. Rg3+ Qg5 3. Rxg5+
                                    Kh6 4. Rg3 Be3 5. Rxe3 Rd8 6. Bd3 Kg7
                                    7. Rg3+ Kh8 8. Rh3 Nxe5 9. Rxh7+
               10->   0.53   4.10   1. Qxg7+ Kxg7 2. Rg3+ Qg5 3. Rxg5+
                                    Kh6 4. Rg3 Be3 5. Rxe3 Rd8 6. Bd3 Kg7
                                    7. Rg3+ Kh8 8. Rh3 Nxe5 9. Rxh7+
               11     1.12   4.25   1. Qxg7+ Kxg7 2. Rg3+ Qg5 3. Rxg5+
                                    Kh6 4. Rg3 Be3 5. Rxe3 Rg8 6. Rh3+
                                    Kg7 7. Bd3 Nxe5 8. Rxh7+ Kf6 9. Be4
                                    Nxc4 10. Bxa8 Nxa3
               11->   1.32   4.25   1. Qxg7+ Kxg7 2. Rg3+ Qg5 3. Rxg5+
                                    Kh6 4. Rg3 Be3 5. Rxe3 Rg8 6. Rh3+
                                    Kg7 7. Bd3 Nxe5 8. Rxh7+ Kf6 9. Be4
                                    Nxc4 10. Bxa8 Nxa3
               12     2.79   4.11   1. Qxg7+ Kxg7 2. Rg3+ Qg5 3. Rxg5+
                                    Kh6 4. Rg3 Be3 5. Rxe3 Rg8 6. Rh3+
                                    Kg7 7. Bd3 h6 8. Rg3+ Kh8 9. Rxg8+
                                    Kxg8 10. Nf3 Kg7 11. Kd2 f5
               12->   3.34   4.11   1. Qxg7+ Kxg7 2. Rg3+ Qg5 3. Rxg5+
                                    Kh6 4. Rg3 Be3 5. Rxe3 Rg8 6. Rh3+
                                    Kg7 7. Bd3 h6 8. Rg3+ Kh8 9. Rxg8+
                                    Kxg8 10. Nf3 Kg7 11. Kd2 f5
               13     6.45   4.41   1. Qxg7+ Kxg7 2. Rg3+ Qg5 3. Rxg5+
                                    Kh6 4. Rg3 Be3 5. Rxe3 Rg8 6. Bc1 Kg7
                                    7. Rg3+ Kh8 8. Bg5 Rg6 9. Bf6+ Kg8
                                    10. Bd3 Rxg3 11. hxg3
               13->   7.75   4.41   1. Qxg7+ Kxg7 2. Rg3+ Qg5 3. Rxg5+
                                    Kh6 4. Rg3 Be3 5. Rxe3 Rg8 6. Bc1 Kg7
                                    7. Rg3+ Kh8 8. Bg5 Rg6 9. Bf6+ Kg8
                                    10. Bd3 Rxg3 11. hxg3
               14    11.59     ++   1. Qxg7+!!
               14    20.48   5.56   1. Qxg7+ Kxg7 2. Rg3+ Qg5 3. Rxg5+
                                    Kh6 4. Rg3 Be3 5. fxe3 Nxe5 6. Bb2
                                    f6 7. e4 Ng4 8. Rxg4 e5 9. Bc1+ Kh5
                                    10. Rg7 h6
               14->  23.59   5.56   1. Qxg7+ Kxg7 2. Rg3+ Qg5 3. Rxg5+
                                    Kh6 4. Rg3 Be3 5. fxe3 Nxe5 6. Bb2
                                    f6 7. e4 Ng4 8. Rxg4 e5 9. Bc1+ Kh5
                                    10. Rg7 h6
               15     1:23   5.52   1. Qxg7+ Kxg7 2. Rg3+ Qg5 3. Rxg5+
                                    Kh6 4. Rg3 Be3 5. fxe3 Nxe5 6. Bb2
                                    d6 7. e4 Ng6 8. Rh3+ Kg5 9. Nf3+ Kf4
                                    10. Bxh8 Nxh8 11. Rh4+ Ke3 12. Rxh7
               15->   1:34   5.52   1. Qxg7+ Kxg7 2. Rg3+ Qg5 3. Rxg5+
                                    Kh6 4. Rg3 Be3 5. fxe3 Nxe5 6. Bb2
                                    d6 7. e4 Ng6 8. Rh3+ Kg5 9. Nf3+ Kf4
                                    10. Bxh8 Nxh8 11. Rh4+ Ke3 12. Rxh7
               16     3:04   5.36   1. Qxg7+ Kxg7 2. Rg3+ Qg5 3. Rxg5+
                                    Kh6 4. Rg3 Be3 5. fxe3 Nxe5 6. Bb2
                                    d6 7. e4 Ng6 8. Rh3+ Kg5 9. Nf3+ Kf4
                                    10. Bxh8 Nxh8 11. Rh4+ Ke3 12. Rxh7
                                    Bb7
               16->   3:37   5.36   1. Qxg7+ Kxg7 2. Rg3+ Qg5 3. Rxg5+
                                    Kh6 4. Rg3 Be3 5. fxe3 Nxe5 6. Bb2
                                    d6 7. e4 Ng6 8. Rh3+ Kg5 9. Nf3+ Kf4
                                    10. Bxh8 Nxh8 11. Rh4+ Ke3 12. Rxh7
                                    Bb7
?              17     6:30   1/48*  1. Qxg7+
White(1): ?
              time=6:34  cpu=99%  mat=-2  n=1083335690  fh=94%  nps=2.74M
              ext-> chk=72911828 cap=1374513 pp=1100983 1rep=6624847 mate=559078

              predicted=0  nodes=1083335690  evals=117292162  50move=0
              endgame tablebase-> probes=0  hits=0
              hashing-> 15%(raw) 14%(depth)  99%(sat)  99%(pawn)
              hashing-> 0%(exact)  10%(lower)  2%(upper)



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