lichess.org
Donate

Why is losing on time when opponent has insufficient mating material not considered as a draw?

So I was playing this 5+0 game and in the endgame my opponent had only one bishop while I had a bishop and two pawns, I thought it will be considered as a draw since he can't checkmate me.
your opponent could even checkmate you if you didnt have 2 pawns
This game?

A series of legal moves exists leading to checkmate, so you duly lost on time.
FIDE Laws of Chess.
As stated already, the rule doesn't mention material, but a series of legal moves, and they could be a series of really bad moves that no one would ever play on purpose.

But it gets more complicated.

In some rare circumstances with the same material, a series of legal moves will exist in some positions, but not others. So in a tournament with an arbiter, an arbiter would determine if a series of legal moves exists, and if they don't, rule a draw. But in online games where there's no arbiter it would be a loss on time as it's quite complicated and computationally expensive to determine with 100% accuracy if a series of legal moves does or doesn't exist.

So with online games they just look at the material, and not the position.
To avoid such cases, play with increment.
#3 i dont think so, you can checkmate with 1 knight each side, but with 1 bishop i dont see how
#7
Yes, you can checkmate in the corner with opposite colored bishops.
@VanillaMilk I don't think lichess has an endgame tablebase, so here's a different site

syzygy-tables.info/?fen=8/8/8/8/8/8/b7/k1K1B3_w_-_-_0_1

I don't think white can force a checkmate, but with blacks help, white can checkmate black.
That's the only criteria needed, is there any series of moves, even really bad and self destructive moves, that will lead to checkmate.

This topic has been archived and can no longer be replied to.