bug report: N+K vs B+K against bot doesn't draw.
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in a game against a bot I had Knight and King vs Bishop and King. normally (in a game against a human) this would be a draw. it isn't though against a bot.
this is a bug report, perhaps just take the auto draw logic from regular games and adjudicate forced draws due to insufficient material?
Jan 13, 2021
0
#2
bopolissimus wrote:
in a game against a bot I had Knight and King vs Bishop and King. normally (in a game against a human) this would be a draw. it isn't though against a bot. this is a bug report, perhaps just take the auto draw logic from regular games and adjudicate forced draws due to insufficient material?
I think in normal games that is only a draw on timeout.
bopolissimus wrote:
in a game against a bot I had Knight and King vs Bishop and King. normally (in a game against a human) this would be a draw. it isn't though against a bot. this is a bug report, perhaps just take the auto draw logic from regular games and adjudicate forced draws due to insufficient material?
The computer will not second guess your moves in a game while both players still have time on their clocks. Only if mate is impossible will it declare a draw...eg K vs K.
Otherwise you need to play on.
Thanks, I don't get to play this sort of position much so every few years I'll forget that the criterion isn't whether it's possible to checkmate but rather whether a checkmate position can be constructed (even if it involves help from the losing side, i.e., helpmate).
So I constructed below and clearly it's possible to helpmate.
https://lichess.org/editor/kn6/1B6/1K6/8/8/8/8/8_w_-_-_0_1
bopolissimus wrote:
Thanks, I don't get to play this sort of position much so every few years I'll forget that the criterion isn't whether it's possible to checkmate but rather whether a checkmate position can be constructed (even if it involves help from the losing side, i.e., helpmate).
So I constructed below and clearly it's possible to helpmate.
https://lichess.org/editor/kn6/1B6/1K6/8/8/8/8/8_w_-_-_0_1
Yes indeed. Normally in such an endgame position, the two players will agree to a draw. Otherwise they will chase each other round the board until either the position gets repeated 3 times or the 50 move rule kicks in. In both the latter two occurrences the computer will declare an automatic draw.
Lagomorph 写道:
bopolissimus wrote:
in a game against a bot I had Knight and King vs Bishop and King. normally (in a game against a human) this would be a draw. it isn't though against a bot. this is a bug report, perhaps just take the auto draw logic from regular games and adjudicate forced draws due to insufficient material?
The computer will not second guess your moves in a game while both players still have time on their clocks. Only if mate is impossible will it declare a draw...eg K vs K.
Otherwise you need to play on.
Mate IS impossible
tacticspotter wrote:
Mate IS impossible
Forced mate is impossible. Mate is possible.
Lagomorph 写道:
tacticspotter wrote:
Mate IS impossible
Forced mate is impossible. Mate is possible.
What do you mean
show me a diagram where KB vs KN is a win
like ANY position
tacticspotter wrote:
Lagomorph 写道:
tacticspotter wrote:
Mate IS impossible
Forced mate is impossible. Mate is possible.
What do you mean
show me a diagram where KB vs KN is a win
like ANY position
https://lichess.org/editor/kn6/1B6/1K6/8/8/8/8/8_w_-_-_0_1
Jan 15, 2021
0
#10
tacticspotter wrote:
Lagomorph 写道:
tacticspotter wrote:
Mate IS impossible
Forced mate is impossible. Mate is possible.
What do you mean
show me a diagram where KB vs KN is a win
like ANY position
Alternative to @Lagomorph's position is
From a general position in this endgame the player that wins is the one with the highest value of
(time remaining on clock) x (achievable semi-random legal move rate)
The bot should win hands down if it's properly programmed.
MARattigan wrote:
From a general position in this endgame the player that wins is the one with the highest value of
(time remaining on clock) x (achievable semi-random legal move rate)
The bot should win hands down if it's properly programmed.
On this website no player (or bot) could win on time in a K+N vs K+B endgame. On a timeout it would be a draw due to insufficient material (chess.com definition).
Under FIDE competition rules a timeout would be a win for the player with time. But as long as a player is able to make 50 moves before his clock runs out he calls the arbiter and claims a draw.