Posted by Chessfun (Profile) on February 07, 2006 at 20:09:56:
These are the positions currently being looked at by the CCRL. These positions
go back to a previous debate at CCC with a lot of the positions suggested by
Sune. The first 9 are from GM Nunns endgame test with one position removed. The
other 11 positions were at various times posted at CCC and some were tested
previously here.
The positions would be used for playing the 11 top engines in CCRL's Pure list
at 4040 AMD 64 3800+ equal, all play all 20 times White, 20 times Black.
Engines would all have accesss to complete 5 person tablebases and for engines
that don't use them the next counterpart of that engine may be tried at a later
date.
All games would be run as engine matches.
Thoughts and comments on these positions is welcome.
Sarah
Posted by Sune Larsson (Profile) on December 28, 2005 at 10:48:47:
The first 9 are, as far as I know, rather balanced - the Nunn endings:
8/1ppr1kp1/p1p4p/8/8/5P2/PPP1RKPP/8 w - - 0 1
8/1pk3pp/p7/3p1p2/3K4/6P1/PP2PP1P/8 b - - 0 1
8/4k3/r4pp1/pR6/P4KP1/5P2/8/8 w - - 0 1
8/p1p1k3/1p1p2p1/3Pq2p/2P1P3/1P3QPK/P7/8 w - - 0 1
8/p3ppk1/1p4pp/3nN3/6PP/1P3P2/P3PK2/8 w - - 0 1
7k/pp4pp/2n5/8/8/P7/1P4PP/2K1B3 b - - 0 1
8/8/p4Bp1/1pPb2P1/1P2kp2/P7/5K2/8 w - - 0 1
8/4k3/p1B4p/2K5/1P4bP/8/8/8 b - - 0 1
3R4/1p6/2b5/2P1k2p/p3p2P/P6r/1P2KB2/8 b - - 0 1
The following 11 are unbalanced positions to test the engines knowledge
about specific themes - not covered in the Nunn positions.
8/5b2/1k2p1p1/2NpP1P1/1K1P4/8/8/8 w - - 0 1
This one is about "good knight vs bad bishop" - a typical French position.
White is winning.
8/5p1k/r5pp/P7/3R3P/6P1/5PK1/8 w - - 0 1
This is a rook ending - theme "rook behind the pawn". White is winning.
4b3/5k2/4p1p1/3pP2p/2pP1P1P/2P5/6N1/2K5 w - - 0 1
Another "good knight vs bad bishop". White is winning.
8/1p1b2k1/p1p1p1p1/2P1P2p/1P3P1P/P2B4/5K2/8 w - - 0 1
"Good bishop vs bad bishop". White is winning.
6k1/2p3np/1p1p2p1/3P4/1PPK1R2/6PB/7P/4r3 w - - 0 1
"Giving up material for positional advantage". R+B vs R+Kn. White wins.
1n6/4k2p/p3ppp1/1pPp4/3P1PP1/3NP3/P3K2P/8 w - - 0 1
Knight ending - white is winning. Maybe too easy?
3r4/7p/Rp4k1/5p2/4p3/2P5/PP3P1P/5K2 b - - 0 1
"Activity in rook ending". Black can draw this one.
8/4k3/1p2b1pp/p1p1p3/P1P1P3/1P3P1P/5KB1/8 b - - 0 37
"Good bishop vs bad bishop". Black is winning. Maybe too easy?
2r5/1p1k1p2/p2p2p1/P1PPnp1p/1P1K1N1P/5P2/4R1P1/8 w - - 0 1
R+Kn vs R+Kn - "Giving up material for positional advantage". White wins.
8/6b1/4k2p/p1p1p1p1/2P1K1P1/PP3N1P/8/8 w - - 0 1
"Good knight vs bad bishop". White wins.
2r3k1/4pp1p/3p2p1/p2R4/1r6/1P4P1/P3PP1P/R5K1 b - - 0 1
Double rook ending. Black should have good chances of winning this.
/S
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