Author: Dann Corbit
Date: 13:02:53 02/08/01
Go up one level in this thread
On February 08, 2001 at 15:56:28, José Antônio Fabiano Mendes wrote:
> Zaitsev vs Bonch-Osmolovski (USSR,1970)
> [D]2b1r2r/ppq1nk2/3Rn1pp/1Pp1Pp2/2B5/2B2N2/P2Q1PPP/3R2K1 w
> 1.Bxe6+ Bxe6 2.Rxe6 Kxe6 3.Qxe6! 1-0
> Source: "The Penguin Book of Chess Positions",1973
> C.H.O'D.Alexander [page 163]
> The author writes: "As so often,the difficulty in finding 3.Qxh6!
> lies in one's automatic rejection mechanism ---
> one just doesn't consider it; it is particularly
> hard to see such moves at the end of a combination."
Crafty finds it in less than 7 seconds on my machine.
EPD Kit revision date: 1996.04.21
found computer opening book file [e:\crafty\release/bookc.bin].
hash table memory = 96M bytes.
pawn hash table memory = 10M bytes.
EGTB cache memory = 64M bytes.
draw score set to 0.00 pawns.
choose from book moves randomly (using weights.)
choose from 5 best moves.
book learning enabled
result learning enabled
position learning enabled
threshold set to 9 pawns.
6 piece tablebase files found
20899kb of RAM used for TB indices and decompression tables
Crafty v18.2
White(1): st 999
search time set to 999.00.
White(1): epdpfga jafm3.epd jafm3.out
PFGA: EPD record: 1
middle-game phase
clearing hash tables
time surplus 0.00 time limit 16:39 (16:39)
nss depth time score variation (1)
6 0.26 2.08 1. Qe3 Ng8 2. R1d5 b6 3. Rc6 Qe7
6 0.41 2.13 1. Ba5 b6 2. Bc3 Ng8 3. Qf4 Kg7
6-> 0.44 2.13 1. Ba5 b6 2. Bc3 Ng8 3. Qf4 Kg7
7 0.48 2.20 1. Ba5 b6 2. Bc3 Ng8 3. Rc6 Qe7 4.
Qf4
7-> 0.87 2.20 1. Ba5 b6 2. Bc3 Ng8 3. Rc6 Qe7 4.
Qf4
8 0.99 1.93 1. Ba5 b6 2. Bc3 Ng8 3. Rc6 Qe7 4.
Qf4 Kg7
8 1.52 2.08 1. Qf4 Ng8 2. Nh4 Kg7 3. Qg3 Qf7 4.
f4 b6
8 3.01 2.23 1. Ne1 Ng8 2. Nd3 g5 3. f3 Kg7 4. Qe3
Qe7
8-> 3.04 2.23 1. Ne1 Ng8 2. Nd3 g5 3. f3 Kg7 4. Qe3
Qe7
9 4.20 2.37 1. Ne1 Ng8 2. Nd3 g5 3. Qe3 Kg7 4.
Qf3 Nd4 5. Qh5
9 5.36 2.49 1. Qf4 Rd8 2. Rxd8 Rxd8 3. Rxd8 Qxd8
4. Qxh6 Qd1+ 5. Be1 Kg8
9 6.46 ++ 1. Bxe6+!!
9 7.43 3.55 1. Bxe6+ Bxe6 2. Rxe6 Kxe6 3. Qxh6
f4 4. Qg5 Rhf8 5. Rd6+ Qxd6 6. exd6
Rf5 7. d7 Kxd7
9-> 8.55 3.55 1. Bxe6+ Bxe6 2. Rxe6 Kxe6 3. Qxh6
f4 4. Qg5 Rhf8 5. Rd6+ Qxd6 6. exd6
Rf5 7. d7 Kxd7
10 10.07 -- 1. Bxe6+
10 12.68 3.21 1. Bxe6+ Bxe6 2. Rxe6 Kxe6 3. Qxh6
f4 4. Qxf4 Nf5 5. Ng5+ Ke7 6. Qc4 Nh6
7. Qe6+ Kf8 8. Qxg6
10-> 17.51 3.21 1. Bxe6+ Bxe6 2. Rxe6 Kxe6 3. Qxh6
f4 4. Qxf4 Nf5 5. Ng5+ Ke7 6. Qc4 Nh6
7. Qe6+ Kf8 8. Qxg6
11 23.75 3.32 1. Bxe6+ Bxe6 2. Rxe6 Kxe6 3. Qxh6
f4 4. Qxf4 Nf5 5. Ng5+ Ke7 6. Qc4 Kf8
7. Ne6+ Rxe6 8. Qxe6 Kg7
11-> 37.53 3.32 1. Bxe6+ Bxe6 2. Rxe6 Kxe6 3. Qxh6
f4 4. Qxf4 Nf5 5. Ng5+ Ke7 6. Qc4 Kf8
7. Ne6+ Rxe6 8. Qxe6 Kg7
12 39.05 ++ 1. Bxe6+!!
12 1:02 6.01 1. Bxe6+ Bxe6 2. Rxe6 Kxe6 3. Qxh6
f4 4. Qg5 Ref8 5. Rd6+ Kf7 6. e6+ Ke8
7. Rd7 Qxd7 8. exd7+ Kxd7 9. Qg4+ Kc7
10. Bxh8
12-> 1:12 6.01 1. Bxe6+ Bxe6 2. Rxe6 Kxe6 3. Qxh6
f4 4. Qg5 Ref8 5. Rd6+ Kf7 6. e6+ Ke8
7. Rd7 Qxd7 8. exd7+ Kxd7 9. Qg4+ Kc7
10. Bxh8
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