Author: Jeremiah Penery
Date: 09:49:55 09/04/02
Go up one level in this thread
On September 04, 2002 at 11:42:12, K. Burcham wrote:
>
>will your program play 13...Kf7, allowing white's Queen to capture the black
>Rook?
>after your program sees Kf7, how long before your program sees 15...g6 in the
>same line?
>
>kburcham
>
> [D] 2r1kbnr/1b1p2pp/p1q1p3/3N1p2/PpP1PP2/3B4/1P1BQ1PP/R3K2R b KQk - 11 1
>
>
>
>[Event "Germany - Greece"]
>[Site "Furth, Germany"]
>[Date "2002.09.03"]
>[Round "4"]
>[White "Schmaltz(GM)"]
>[Black "Banikas(GM)"]
>[Result "0-1"]
>[WhiteElo "2547"]
>[BlackElo "2520"]
>[Opening "Sicilian: Taimanov (Bastrikov) variation"]
>[ECO "B47"]
>[NIC "SI.40"]
>[Time "08:34:00"]
>[TimeControl "5400+30"]
>
>1. e4 c5 2. Nf3 Nc6 3. Nc3 e6 4. d4 cxd4 5. Nxd4 Qc7 6. f4 a6 7. Nxc6 Qxc6
>8. Bd3 b5 9. Qe2 Bb7 10. Bd2 Rc8 11. a4 b4 12. Nd5 f5 13. c4 Kf7 14. exf5
>exd5 15. Qh5+ g6 16. fxg6+ hxg6 17. Qxh8 dxc4 18. Qh7+ Bg7 19. Qxg6+ Qxg6
>20. Bxg6+ Kxg6 21. O-O-O c3 22. bxc3 Be4 23. Rhe1 d5 24. Re3 bxc3 25. Rg3+
>Kf7 {Black wins} 0-1
This is a modified Crafty 18.15 on AthlonXP 1600MHz:
White(1): 2r1kbnr/1b1p2pp/p1q1p3/3N1p2/PpP1PP2/3B4/1P1BQ1PP/R3K2R b KQk - 11 1
Black(1): disp
+---+---+---+---+---+---+---+---+
8 | | | *R| | *K| *B| *N| *R|
+---+---+---+---+---+---+---+---+
7 | | *B| | *P| | | *P| *P|
+---+---+---+---+---+---+---+---+
6 | *P| | *Q| | *P| | | |
+---+---+---+---+---+---+---+---+
5 | | | | N | | *P| | |
+---+---+---+---+---+---+---+---+
4 | P | *P| P | | P | P | | |
+---+---+---+---+---+---+---+---+
3 | | | | B | | | | |
+---+---+---+---+---+---+---+---+
2 | | P | | B | Q | | P | P |
+---+---+---+---+---+---+---+---+
1 | R | | | | K | | | R |
+---+---+---+---+---+---+---+---+
a b c d e f g h
Black(1): analyze
Analyze Mode: type "exit" to terminate.
clearing hash tables
time surplus 0.00 time limit 30.00 (3:30)
nss depth time score variation (1)
Previous depths snipped.
9-> 1:00 0.23 1. ... fxe4 2. Bxe4 Qxc4 3. Nf6+ Nxf6
4. Bxb7 Qxe2+ 5. Kxe2 Rc2 6. Rhc1 Rxb2
7. Bxa6
10 1:43 ++ 1. ... fxe4!!
10 2:31 -0.31 1. ... fxe4 2. Bxe4 Qxc4 3. Nf6+ Nxf6
4. Bxb7 Qxe2+ 5. Kxe2 Rc2 6. Bxa6 Ne4
7. Kd3 Rxb2 8. Kxe4 Rxd2
10-> 2:44 -0.31 1. ... fxe4 2. Bxe4 Qxc4 3. Nf6+ Nxf6
4. Bxb7 Qxe2+ 5. Kxe2 Rc2 6. Bxa6 Ne4
7. Kd3 Rxb2 8. Kxe4 Rxd2
11 4:05 -0.02 1. ... fxe4 2. Bxe4 Qxc4 3. Nf6+ Nxf6
4. Bxb7 Qxe2+ 5. Kxe2 Rc2 6. b3 Bd6
7. Rhf1 a5 8. Rac1
11 44:50 -0.10 1. ... Kf7 2. exf5 exd5 3. Qh5+ g6
4. fxg6+ hxg6 5. Qxh8 dxc4 6. Bc2 Qe6+
7. Kd1 Bg7 8. f5 Bxh8 9. fxe6+ Kxe6
11-> 46:37 -0.10 1. ... Kf7 2. exf5 exd5 3. Qh5+ g6
4. fxg6+ hxg6 5. Qxh8 dxc4 6. Bc2 Qe6+
7. Kd1 Bg7 8. f5 Bxh8 9. fxe6+ Kxe6
Elapsed Time: 46:37, CPU Time: 44:41, CPU Use: 95%
Material Balance: 0, Previous Moves Predicted: 0
Nodes: 707461686, Evaluations: 201107814, FH%: 85%, NPS: 252k
EXTENSIONS->
Threat: 72604, Passed Pawn: 700462, Recapture: 2984539
One-Reply: 4133533, Check: 38734252, Pawn Sac: 4465473
Booster: 9686430
PRUNING-> Razors-> White: 8098521, Black: 330503
Futility-> White: 213686981, Black: 21203588
TABLEBASES-> Probes: 0, Successful: 0
HASH TABLES-> Hash Hits: 15% (16047020/104319127)
Pawn Hash Hits: 98% (568510081/574977005)
Hash Table Filled: 99%
Not sure why it takes so long searching Kf7 at the 11th iteration, it seemed
like it was doing several researches or something. Note also the slow NPS
value. I have added a complex attack-detection function to the evaluation which
really slows it down. I may try to rewrite the function in a faster way, though
I'm not sure how.
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