You have to be able to forceate without opponents help
Bug in software, not sufficient material
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That is not true
Jun 9, 2019
0
#5
But you would not be able to force that position you describe with a King and a Knight only
You don't have to force it. Your opponent can play badly
Jun 9, 2019
0
#7
You are correct by FIDE rules. Chess.com has their own system (probably because it‘s easier to check)
Jun 9, 2019
0
#8
jonathanpiano13 wrote:
You are correct by FIDE rules. Chess.com has their own system (probably because it‘s easier to check)
That is correct, the site does not use the FIDE ruling of if mate is possible by any series of legal moves, it primarily only looks at the material the side with time has. The rules used here are closer to the USCF rules, where mate has to be forceable.
So, K+B, K+N, and K+N+N is considered insufficient material. I believe in the latter case the site gives the win if the other side also has a pawn; that wasn't the case in the past, but it is now more aligned with FIDE and USCF rules.
https://support.chess.com/customer/en/portal/articles/1444798-how-do-i-claim-a-draw-
The end of that article explains it.
Does it mean that a player who has been correctly forced into Stamma´s mate should refuse to move and run out of time, and with a forced mate in one on board would be entitled to claim draw when time is ended?
At this position, Black on board resigned. Had he not resigned, black has one legal move - a2 - at which point white would have a mate in one, with Nb3#.
In this site, Black would be entitled to stop moving, run out of time and claim draw by insufficient material. Correct?
Hello!
I was just playing a game in which in the final position I had a knight and king, vs my opponents two pawns and king. My opponent runs out of time and I expect the win. However, the game is drawn by "not sufficient material". This is clearly wrong since my opponent could promote to a bishop and then put his king in the corner, a position that would lead to mate.
Best regards,