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Winning on time with insufficient material

Zenozoic

How can it be possible that my opponent wins with insufficient material (only King and Bishop) because I run out of time? (After declining my draw request) Is not the engine programmed to rule a draw in such a case?

How can it be possible that my opponent wins with insufficient material (only King and Bishop) because I run out of time? (After declining my draw request) Is not the engine programmed to rule a draw in such a case?
corvusmellori

Because there is a legal sequence of moves that results in Black being checkmated.

I assume you're talking about this game.

https://lichess.org/game/WUKK8nwx/black#133

Checkmate is possible.

https://lichess.org/game/O4Cy8l6O#147

[Variant "From Position"]
[FEN "8/8/8/7p/5k1K/7B/8/3b4 b - - 29 67"]

67... Kf3 68. Be6 Kg2 69. Bd7 Kh1 70. Kg3 h4+ 71. Kf2 h3 72. Kf1 h2 73. Bg4 Ba4 74. Bf3#

"Insufficient Material" is not a concept in FIDE chess laws or on lichess, though it does appear in the rules of some national federations (like the US chess federation). What matters is that there is a legal sequence of moves that results in a checkmate.

Because there is a legal sequence of moves that results in Black being checkmated. I assume you're talking about this game. https://lichess.org/game/WUKK8nwx/black#133 Checkmate is possible. https://lichess.org/game/O4Cy8l6O#147 [Variant "From Position"] [FEN "8/8/8/7p/5k1K/7B/8/3b4 b - - 29 67"] 67... Kf3 68. Be6 Kg2 69. Bd7 Kh1 70. Kg3 h4+ 71. Kf2 h3 72. Kf1 h2 73. Bg4 Ba4 74. Bf3# "Insufficient Material" is not a concept in FIDE chess laws or on lichess, though it does appear in the rules of some national federations (like the US chess federation). What matters is that there is a legal sequence of moves that results in a checkmate.
tpr

6.9 Except where one of Articles 5.1.1, 5.1.2, 5.2.1, 5.2.2, 5.2.3 applies, if a player does not complete the prescribed number of moves in the allotted time, the game is lost by that player. However, the game is drawn if the position is such that the opponent cannot checkmate the player’s king by any possible series of legal moves.

A series of legal moves exists to checkmate you, so you duly lost on time.
If you dislike that, then play with increment, so you have time to demonstrate your defense.

6.9 Except where one of Articles 5.1.1, 5.1.2, 5.2.1, 5.2.2, 5.2.3 applies, if a player does not complete the prescribed number of moves in the allotted time, the game is lost by that player. However, the game is drawn if the position is such that the opponent cannot checkmate the player’s king by any possible series of legal moves. A series of legal moves exists to checkmate you, so you duly lost on time. If you dislike that, then play with increment, so you have time to demonstrate your defense.
Zenozoic

@corvusmellori said ^

Because there is a legal sequence of moves that results in Black being checkmated.

I assume you're talking about this game.

https://lichess.org/game/WUKK8nwx/black#133

Checkmate is possible.

https://lichess.org/game/O4Cy8l6O#147

[Variant "From Position"]
[FEN "8/8/8/7p/5k1K/7B/8/3b4 b - - 29 67"]

67... Kf3 68. Be6 Kg2 69. Bd7 Kh1 70. Kg3 h4+ 71. Kf2 h3 72. Kf1 h2 73. Bg4 Ba4 74. Bf3#

"Insuff...

Thank you!

@corvusmellori said [^](/forum/redirect/post/OqZ1yhlP) > Because there is a legal sequence of moves that results in Black being checkmated. > > I assume you're talking about this game. > https://lichess.org/game/WUKK8nwx/black#133 > > Checkmate is possible. > > https://lichess.org/game/O4Cy8l6O#147 > > [Variant "From Position"] > [FEN "8/8/8/7p/5k1K/7B/8/3b4 b - - 29 67"] > > 67... Kf3 68. Be6 Kg2 69. Bd7 Kh1 70. Kg3 h4+ 71. Kf2 h3 72. Kf1 h2 73. Bg4 Ba4 74. Bf3# > > "Insuff... Thank you!
Zenozoic

@tpr said ^

6.9 Except where one of Articles 5.1.1, 5.1.2, 5.2.1, 5.2.2, 5.2.3 applies, if a player does not complete the prescribed number of moves in the allotted time, the game is lost by that player. However, the game is drawn if the position is such that the opponent cannot checkmate the player’s king by any possible series of legal moves.

A series of legal moves exists to checkmate you, so you duly...

Thank you!

@tpr said [^](/forum/redirect/post/1CD1bSSZ) > 6.9 Except where one of Articles 5.1.1, 5.1.2, 5.2.1, 5.2.2, 5.2.3 applies, if a player does not complete the prescribed number of moves in the allotted time, the game is lost by that player. However, the game is drawn if the position is such that the opponent cannot checkmate the player’s king by any possible series of legal moves. > > A series of legal moves exists to checkmate you, so you duly... Thank you!