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Playing the endgame like a boss !!

Posted: Tue Mar 12, 2019 6:50 pm
by glennsamuel32
CCC 6
lc0 vs Stockfish
Game 54


Re: Playing the endgame like a boss !!

Posted: Tue Mar 12, 2019 7:35 pm
by xr_a_y
What the hell is this thing ? is lc0 really played so bad at the end ?

Re: Playing the endgame like a boss !!

Posted: Tue Mar 12, 2019 8:03 pm
by mwyoung
xr_a_y wrote:
Tue Mar 12, 2019 7:35 pm
What the hell is this thing ? is lc0 really played so bad at the end ?
Playing bad? Lc0 won the game with Lc0's epic trolling endgame play. Promoting to a rook, sacing the bishop. Sweet.

Re: Playing the endgame like a boss !!

Posted: Wed Mar 13, 2019 3:58 am
by supersharp77
mwyoung wrote:
Tue Mar 12, 2019 8:03 pm
xr_a_y wrote:
Tue Mar 12, 2019 7:35 pm
What the hell is this thing ? is lc0 really played so bad at the end ?
Playing bad? Lc0 won the game with Lc0's epic trolling endgame play. Promoting to a rook, sacing the bishop. Sweet.
E4-E5 Nf3 F5?!.....Your kidding..Right? Result is meaningless...How did Stockfish exactly get one pawn down? :D :wink:

Re: Playing the endgame like a boss !!

Posted: Wed Mar 13, 2019 10:44 am
by jp
Why is it doing that when it has tablebases?
Tablebases years ago made normal engines do weird things, but not like this.

Re: Playing the endgame like a boss !!

Posted: Wed Mar 13, 2019 3:29 pm
by ernest
+1 !

Probably did not have tablebases, or ???...

Re: Playing the endgame like a boss !!

Posted: Wed Mar 13, 2019 4:38 pm
by hgm
It certainly would not play like this even if it had only 3-men EGT (as KRK would be amongst those). This is just what you get if you train the engine to recognize a certain win, but do not train it how to make progress in cashing it. It is equally happy with any KRK position, they are all 100% certain wins. So the pieces just diffuse aimlessly over the board.

Re: Playing the endgame like a boss !!

Posted: Wed Mar 13, 2019 4:43 pm
by jp
CCC claim they use 7-man Syzygy TBs.
Wonder if there's some error somewhere.

Re: Playing the endgame like a boss !!

Posted: Thu Mar 14, 2019 8:45 am
by hgm
That CCC uses 7-men EGT doesn't mean that this particular engine supports uses EGT. Obviously CCC was not using the EGT to adjudicate.

Re: Playing the endgame like a boss !!

Posted: Thu Mar 14, 2019 9:02 am
by M ANSARI
The sad truth is that there are just way too many games like that with Lc0 and while in this case the end result was still a win for Lc0 … on many occasions there is a draw or even a loss, in what was a winning position. It is behaviour like this that makes Lc0 useless as a stand alone chess engine to analyse with. This needs to be fixed pronto!