forced mate
Dave Giunti #136 @11554
0R 36 11/25 02:33 WWIVnet 11579->11555
0R 36 11/23 23:36 WWIVnet 11554->11579
0R 36 11/23 22:09 WWIVnet ->11554
Response To: ALL
L<> FROM: liberman <leonide#total.net> #2748 @11551
L<>
L<> If somebody would like to try few forced mate positions, write me:
L<> Libeman L. leo...@total.net.
L<>
L<> It will be important for me to see the results of this trying on the most
L<> strong chess games.
L<>
L<> The forced mate positions must be between 5 and 8 moves. Otherwise the
L<> result will be not clear to me.
L<>
L<> I have already hundreds of such positions ready. But you can try you own
L<> positions, or give me positions of some pieces and I will create the new
L<> one on the spot.
L<>
The following is a nice forced mate in 7 that requires sacrafice.
It's almost too simple nowdays as my old gnuchess version solves it
in no time.
Dave
# ; clear the board & set up white
kh6
pg6
pg7
bf8
pc4
c ; change sides set up black
kg8
pc7
ss ; set to start white play on return and continue
t ; reset clock for timing
. ; return to play menu and go
;Problem 2: White to move and MATE IN SEVEN!!!
;8 __ __ __ __ __ WB bk __
;7 __ __ bp __ __ __ WP __
;6 __ __ __ __ __ __ WP WK
;5 __ __ __ __ __ __ __ __
;4 __ __ WP __ __ __ __ __
;3 __ __ __ __ __ __ __ __
;2 __ __ __ __ __ __ __ __
;1 __ __ __ __ __ __ __ __
; a b c d e f g h
; f8c5 c7c6 c5a3 c6c5 a3b4 c5b4 c4c5 b4b3 c5c6 b3b2 c6c7 b2b1 c7c8
---
JABBER v1.2 Deja moo: knowing you've herd all this bull before.
WWIVMail/QWK 4.54 [REGISTERED]: Berkeley WWIV BBS - @11554 ON WWIVnet
Walter Ravenek
In article <24162ww...@ww4gw.ness.com>, 136-11554%w...@tweekco.ness.com
My chess program Arthur gives the following analysis on a 66 Mhz PowerPC:
time depth eval principal variation
---- ----- ---- -------------------
0:00 | 2 | 651 | f8c5 c7c6
0:00 | 3 | 654 | f8c5 c7c6 c5d4
0:00 | 4 | 644 | f8c5 c7c6 c5d6 c6c5
0:00 | 5 | 580 | h6g5 c7c6 g5f5 c6c5 f8c5
0:00 | 6 | 580 | h6g5 c7c6 g5f5 c6c5 f8c5 g8g7
0:00 | 7 | 1120 | f8c5 c7c6 c5a3 c6c5 a3b4 c5b4 c4c5 b4b3 c5c6
b3b2 ...
0:01 | 8 | +m 7 | f8c5 c7c6 c5a3 c6c5 a3b4 c5b4 c4c5 b4b3 c5c6
b3b2 c6c7 b2b1Q
0:01 | 9 | +m 7 | f8c5 c7c6 c5a3 c6c5 a3b4 c5b4 c4c5 b4b3 c5c6
b3b2 c6c7 b2b1Q c7c8Q
and so on...
i.e., at 8 ply nominal search it finds the mate (the mate move itself is found
in the quiescence search).
--
Walter Ravenek
Dennis Breuker
liberman wrote:
>
> Please, solve 2 forced mate position (in 5 moves) and send me back the
> data that I need. Do this with the best chess game that your have. Thank
> you!
>
> Since I am been writing my own program I want to find:
> 1)How speedy the best games are.
> 2)How reliable their mate solving engin is.
>
> Please, send me:
> 1)Name of your chess game.
> 2)Speed of your computer.
> 3)Time that it took to solve the problem.
> 4)Say me if some inusual happened (distruction of the board...). Give me
> any ditail that you will find intresting to mention.
>
> FIRST POSITION. WHITE TO GO. MATE IN 5 MOVES. (FILE NAME "HUNT")
>
> WHITE PIECES:
> 1)KNIGHTS: D2,E2.
> 2)BISHOPS: A8,H8.
> 3)ROOKS: A6,H6.
> 4)QUEENS: C8,E8,E3,F3,G3,H3,G2,H2,C1.
> 5)KING: G1.
>
> BLACK PIECES.
> 1)PAWN: D4.
> 2)KNIGHTS: C6,E6,F4.
> 3)BISHOPS: B5,F5.
> 4)ROOKS: C5,E5,C4,E4.
> 5)QUEENS: C7,E7,D3.
> 6)KING: D5.
1)Name of chess game: AliBaba, using proof-number search to detect mate.
2)Speed of computer: Sun-sparc2
3)Time that it took to solve the problem: 10.57 sec. (12,735 nodes
examined)
4)Say me if some inusual happened (distruction of the board...). Give me
any ditail that you will find intresting to mention: Mate in 6 found
(Qc8xe6)
>
> SECOND POSITION. BLACK TO GO. MATE IN 5 MOVES. (FILE NAME "REMEMBER")
>
> WHITE PIECES:
> 1)KNIGHTS: B7,H7.
> 2)BISHOPS: B5,H5.
> 3)QUEENS: D8,F8,D7,E7,F7,D6,F6.
> 4)KING: E8.
>
> BLACK PIECES.
> 1)KNIGHTS: E6,D5,E4.
> 2)BISHOPS: H4,D3.
> 3)ROOKS: G5,F2.
> 4)QUEENS: H6,C5,E5,F5,D4,G4,C3,F3.
> 5)KING: G1.
1)Name of chess game: AliBaba, using proof-number search to detect mate.
2)Speed of computer: Sun-sparc2
3)Time that it took to solve the problem: 7.12 sec. (8,156 nodes
examined)
4)Say me if some inusual happened (distruction of the board...). Give me
any ditail that you will find intresting to mention: Mate in 6 found
(Qh6xf8)
> Please, indicate me, for simple identification, the name of the file. Or
> simply say me the date when the position was created (26/11/96).
>
> For curious:
> My computer is Cyrix 486 66 Mhz. The first position (HUNT) took 44
> seconds to solve. The second one (REMEMBER) 1 minute and 22 seconds.
>
> Thank you in advance !
Dennis.
_____________________________________________________________________________
http://www.cs.unimaas.nl/~breuker |
bre...@cs.unimaas.nl
Dept. of computer science, Universiteit Maastricht | Voice:
+31.43.3883379
P.O. Box 616, 6200 MD Maastricht, The Netherlands | Fax :
+31.43.3252392
liberman
SECOND POSITION. BLACK TO GO. MATE IN 5 MOVES. (FILE NAME "REMEMBER")
WHITE PIECES:
1)KNIGHTS: B7,H7.
2)BISHOPS: B5,H5.
3)QUEENS: D8,F8,D7,E7,F7,D6,F6.
4)KING: E8.
BLACK PIECES.
1)KNIGHTS: E6,D5,E4.
2)BISHOPS: H4,D3.
3)ROOKS: G5,F2.
4)QUEENS: H6,C5,E5,F5,D4,G4,C3,F3.
5)KING: G1.
Please, indicate me, for simple identification, the name of the file. Or
simply say me the date when the position was created (26/11/96).
For curious:
My computer is Cyrix 486 66 Mhz. The first position (HUNT) took 44
seconds to solve. The second one (REMEMBER) 1 minute and 22 seconds.
Thank you in advance !
26/11/96. Liberman. leo...@total.net