Found Bug - What is this?

Sort:
Avatar of Lagomorph
cjt33 wrote:
Lagomorph wrote:
DrFrank124c wrote:

Does the draw rule apply if one side has a King and Pawn and the other side has only a King? In some such positions--but not all--the outcome of the game is always a draw.  

If the flag falls when the position on the board is what we would call a "drawn" position........

If the side with the pawn runs out of time, it is clearly a draw.

If the side with the lone king runs out of time, under FIDE rules it would be a win for the side with K+p, as it is possible (though unlikely), would the game continue, for the pawn to be promoted "by any possible series of legal moves" (FIDE wording).

USCF rules are different, and would I believe declare that as the position is "drawn", the result is a draw.

actually a king and pawn vs a king can be winnable assuming you know the correct techniec, there are also positions where it is a draw so it unfair to say that most K+P vs K positions are a draw...

Neither the poster, DrFrank, nor I, have made any such assertion that most K+P vs K positions are a draw. I suggest you reread the posts.

DrFrank asked what would be the outcome in the case of running out of time when the position was a clearly "drawn" position. My reply to him
is based on that board position assumption

Avatar of TBentley

I don't think the USCF necessarily declares it a draw even if it is theoretically drawn, since the opponent may not know how to draw. I agree that it depends on the position.

Avatar of Lagomorph
TBentley wrote:

I don't think the USCF necessarily declares it a draw even if it is theoretically drawn, since the opponent may not know how to draw. I agree that it depends on the position.

This is an interesting subject. It is reasonably clear from other threads that in the case of a flag, the USCF takes a more "realistic" view on the chances of the non-flagged player being able to checkmate if the game were to continue, and would adjudicate a draw in situations where FIDE would adjudicate a win. In short USCF do not give the "benefit of the doubt" to the non-flagged player, and do not take "helpmates" into consideration.

In light of this it would seem logical, that should the situation arise as outlined by DrFrank (clearly drawn position of K+P vs K ), that it would be wrong for the USCF to assume that the flagged player will play badly (give up the opposition ) and allow the lone pawn to Queen.

 

This is all supposition on my part however, and I would love to know if this has ever happened in actual OTB competition.

Avatar of woton

Here's the fly in the ointment.  

If the following position is adjudicated before either player's flag falls, it is a draw (This is a well documented drawn position, and the arbiter would have no choice).  If Black's flag falls, it is a draw, and if White's flag falls, it is a win for Black (The fact that the position is easily drawn is incidental.  It is possible for Black to checkmate White by a series of legal moves, even though White's moves may be senseless).

Chess.com have tried to incorporate this into a single programing step.  It cannot always be done.

Avatar of MikeCrockett

given all the 3, 4, & 5 piece endgame databases that are freely available, it should be a simple matter of setting up an adjudication process to interrogate them without burning a lot of CPU. The current process is a little flaky.

Avatar of MikeCrockett
[COMMENT DELETED]
Avatar of MikeCrockett
[COMMENT DELETED]
Avatar of KvothDuval

spam ^

Avatar of woton

The use of tablebases was considered three years ago.  According to Erik, it would take more processing power than Chess.com wanted to dedicate to the issue.

Avatar of MikeCrockett

Too bad.  It would have been a better solution than what they have today.

Avatar of woton

The present method leaves a lot to be desired, but it's better than having a player in a K vs K position win on time because they can move their mouse faster than their opponent.