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Subject: u2600 ICC Rating List -- Feb 22

Author: Will Singleton

Date: 01:09:49 02/22/99


Under 2600 Club
Feb 22 1999

Program      ICC Blitz  Change   Games     Platform    Author

ZChess           2588     +13       7      K6/266      Franck Zibi
Gromit           2569                      ?           Frank Schneider
XXXXII           2556                      P/266       Martin Zetner
TDChess          2535     +21     488      P/400       Jon Baxter
Stobor           2504     -30       8      K6/350      Tom Kerrigan
Rookie           2491     -57     152      P/360       Marcel van Kervinck
LambChop         2488    +100      65      P/133       Pete McKenzie
BugChess         2445     +17      30      P/450       Erik van het Hof
PostModernist    2431              19      K6/300      Andrew Williams
Amateur          2414     +14      82      Mac/300     Will Singleton
Hossa            2396     -10     329      P/350       Steffen Jakob
Grok             2319     -18      15      K6/300      Peter Kappler
InmiChess        2268     -63      10      Cyrix/233   Werner Inmann
WildChild        1877                      P/200       Brian McKinley

Inactive List

Rival            2248                      P/266       Chris Moreton
EXchess          2332                      Cel/400     Dan Homan
SSEChessII       2395                      P/400       Sam Slutzky


 ICC account names that differ from the program name:
 ----------------------------------------------------------------------------
 Blik (Rookie), zchess1 (Zchess), Kerrigan (Stobor),
 Chrismo (Rival), TayxBot (SSEChessII).
 ----------------------------------------------------------------------------


Notable

Well, things have been fairly hectic this week, and not just on the
chessboard.  But I have a feeling that when the lines of communication
are open, and one has the will, then good things can result.  Stay tuned.

LambChop has made a move, due (I hear) to the changing of lazy eval
and some other things.  It's threatening to jump to the 2500 level soon.
Otherwise, the list order was pretty much unchanged from last week.

New highs were recorded by Zchess (2598) and TDChess (2670).  Those guys
are pushing the envelope, no doubt about it.  TDChess played 488 games to
take the games-played award.

Some of the ratings are remarkably stable.  For example, if you discard
LambChop (for stat purposes), the mean rating change was only about
20 points, while the avg games-played was around 100.  Considering that
one can lose or gain up to 30 points per game, I think that indicates
the ratings we have here are pretty much indicative of the relative
strengths of the programs (for their choice of opponent and time-
control).  Your mileage may vary, but the point is that the list is
taking on a recognizable and stable form.

SSEChessII has been moved to the inactive list.  OilThink has been removed
entirely, since it hasn't played in a few months. If anyone knows what
Oliver is up to, let me know.

New Feature

I thought I'd post a position each week, taken from member submissions
from the current week's play.  Recently on the CCC board we've had a few
positions posted, and these have helped me track down some problems with
my code.  Probably just chance, but I think these things are helpful
for programmers in that they can see how their results differ from others,
and figure out why.

So members, please send me interesting games that your programs play (or
just the positions), and perhaps we can all benefit from the analyses.

To start the ball rolling, here's a position from the game Amateur-LambChop,
played on ICC yesterday.  For some reason, Amateur declined the easy move,
which would have won quickly, and played a tricky move that led to a loss.
On subsequent analysis, it took Amateur 9 ply to see the right move.  During
the actual game (blitz), it only searched about 7 ply.  I'm thinking this
might be some bug or other weirdness.  Does your program have any trouble
finding the right move quickly?

7k/2pn1Q2/2r4p/p1qpp3/Pp1b3N/1P1P2PP/2P1R2B/7K w - -





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