Thread View: gnu.chess
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Started by Peter Stein
Mon, 09 Jul 1990 22:25
GNUCHESS
Author: Peter Stein
Date: Mon, 09 Jul 1990 22:25
Date: Mon, 09 Jul 1990 22:25
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My apologies to the net for my "easy mode" posting. I have since
recovered the pertinent documentation.
Some new observations:
1. "book" is not enabled on successive games unless the program is
exited and started up again. I tried various combinations of
commands to no avail. What always happens is:
1. e2e4 g8f6
2. e4e5 f6e4 ??? and loses the knight in a few after
3. d2d4.
2. Yes, I've seen the comments regarding pawn promotion, but I can't
even promote to a Queen!!
3. I've tried using "edit" to handle the pawn promotions, but it seems
there is no way to delete individual pieces. Do I have to use "#"
to delete the entire board and then enter all the pieces??
4. So far I've conducted two games between CM 2100 and GNUCHESS. At
30 seconds a move GNUCHESS won rather handily, CM dropping a piece
after 17 moves. At 1 minute a move the game fizzled into a dead
drawn position in 52 moves. Both claimed a draw by repetition!
This game started as a sharp double king pawn opening with both
programs offering their queen pawn for initiative. Suddenly the
game degenerated into "brownian motion" as both programs became
eager to eliminate material and shuffle their pieces back and
forth. The resulting equal material ending should have been a draw
with best play, but as it was conducted was in fact a win from
either side on several occassions!!
My assessment so far: a. CM has superior opening book
b. GNUCHESS seems stronger in the middle
game
c. both are equally weak in the ending
NOTE: I've yet to try them at higher levels. I know from experience
that CM isn't half bad at the higher levels.
Your 2200 fish-at-large
Re: GNUCHESS
Author: Brian Wong
Date: Tue, 10 Jul 1990 05:06
Date: Tue, 10 Jul 1990 05:06
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In article <2971@tellab5.tellabs.com>, stein@tellabs.com (Peter Stein) writes:
>
> 2. Yes, I've seen the comments regarding pawn promotion, but I can't
> even promote to a Queen!!
to promote to a queen use (e.g.) h7h8q
under-promotion e.g. a7a8b (bishop)
> 3. I've tried using "edit" to handle the pawn promotions, but it seems
> there is no way to delete individual pieces. Do I have to use "#"
> to delete the entire board and then enter all the pieces??
The following (slightly modified) EditBoard routine will enable you to
delete an individual piece. e.g. use 'xa1' to delete the piece at a1.
void
EditBoard()
/*
* Set up a board position. Pieces are entered by typing the piece followed
* by the location. For example, Nf3 will place a knight on square f3.
*/
{
short a, r, c, sq, i;
char s[80];
ClrScreen();
UpdateDisplay(0, 0, 1, 0);
printz(". exit to main\n");
printz("# clear board\n");
printz("c change sides\n");
printz("enter piece & location: \n");
a = white;
do {
scanz("%s", s);
if (s[0] == '#')
for (sq = 0; sq < 64; sq++) {
board[sq] = no_piece;
color[sq] = neutral;
}
if (s[0] == 'c' || s[0] == 'C')
a = otherside[a];
c = s[1] - 'a';
r = s[2] - '1';
if ((c >= 0) && (c < 8) && (r >= 0) && (r < 8)) {
sq = locn(r, c);
board[sq] = no_piece;
color[sq] = neutral;
for (i = no_piece; i <= king; i++)
if ((s[0] == pxx[i]) || (s[0] == qxx[i])) {
board[sq] = i;
color[sq] = a;
break;
}
}
} while (s[0] != '.');
for (sq = 0; sq < 64; sq++)
Mvboard[sq] = (board[sq] != Stboard[sq]) ? 10 : 0;
GameCnt = 0;
Game50 = 1;
ZeroRPT();
InitializeStats();
ClrScreen();
UpdateDisplay(0, 0, 1, 0);
} /* end of EditBoard */
Brian
Aljechin Defence
Author: Heinola Kari Pekka
Date: Tue, 10 Jul 1990 10:02
Date: Tue, 10 Jul 1990 10:02
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stein@tellabs.com (Peter Stein)in his writing about GNUCHESS
1. "book" is not enabled on successive games unless the program is
exited and started up again. I tried various combinations of
commands to no avail. What always happens is:
1. e2e4 g8f6
2. e4e5 f6e4 ??? and loses the knight in a few after
3. d2d4.
I would disagree with this line. It's a playable.
After 3.d2d4 black can continue with f7-f6 oe e7-e6.
A sample line could be 1.e4 Sf6 2. e5 Se4 3.d4 f6 4.Bd3 d5 5. f3 Sg5
6.Bg5 fg 7.f4 g6. Whites black quares are weak.
For more info you might look for Stefan Bueckers Grotesgue Schacher|fnungen.
--
Kari Heinola
Internet: heinola@tut.fi
TTKK/Mittaustekn. PL 527 SF-33101 Tampere Finland
Tel: 358-(9)31-162456
Re: GNUCHESS
Author: Urban Koistinen
Date: Tue, 10 Jul 1990 16:25
Date: Tue, 10 Jul 1990 16:25
33 lines
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2322 bytes
In article <2971@tellab5.tellabs.com> stein@tellabs.com (Peter Stein) writes: ->Some new observations: -> 3. I've tried using "edit" to handle the pawn promotions, but it seems -> there is no way to delete individual pieces. Do I have to use "#" -> to delete the entire board and then enter all the pieces?? cf7 should clear square f7. This worked for me but of course xf7 would be better. -> 4. So far I've conducted two games between CM 2100 and GNUCHESS. At -> 30 seconds a move GNUCHESS won rather handily, CM dropping a piece -> after 17 moves. At 1 minute a move the game fizzled into a dead -> drawn position in 52 moves. Both claimed a draw by repetition! -> This game started as a sharp double king pawn opening with both -> programs offering their queen pawn for initiative. Suddenly the -> game degenerated into "brownian motion" as both programs became -> eager to eliminate material and shuffle their pieces back and -> forth. The resulting equal material ending should have been a draw -> with best play, but as it was conducted was in fact a win from -> either side on several occassions!! -> My assessment so far: a. CM has superior opening book -> b. GNUCHESS seems stronger in the middle -> game -> c. both are equally weak in the ending -> NOTE: I've yet to try them at higher levels. I know from experience -> that CM isn't half bad at the higher levels. -> -> Your 2200 fish-at-large On a sun4 (sparc) I got about 6000 nodes/s. On a 12 MHz PC-AT-clone I got 300-550 nodes/s. I have heared that CM is much better on 68kx than on 80x86. rgs UK
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