Free online Chess server. Play Chess now in a clean interface. No registration, no ads, no plugin required. Play Chess with the computer, friends or random opponents.
Play
Create a game Tournament Simultaneous exhibitions
Learn
Chess basics Puzzles Practice Coordinates Study Coaches
Watch
Lichess TV Current games Streamers Broadcasts (beta) Video library
Community
Players Teams Forum Questions & Answers
Tools
Analysis board Opening explorer Board editor Import game Advanced search
Sign in
Reconnecting
  1. Forum
  2. Lichess Feedback
  3. Black wins with insufficient material

Hi, I lost this game on time as white. But black has insufficient material...

lichess.org/wE5dwgEP

Wanna do something about it?

Lichess uses an approximation of FIDE rules, which are different than those used by USCF and some of the other chess servers.

In the USCF and some other servers, there are certain material configurations for the side with time remaining (like K+B), that are simply deemed insufficient and if the other side flags it's an automatic draw. This is likely what you're thinking of.

In FIDE rules, what matters is whether there's a sequence of legal moves that results in the side with time remaining checkmating the flagged opponent. It doesn't matter how stupid those moves are; if they exist, then the side with time remaining wins.

Here, for example:

lichess.org/ADiwflNg

Wow I learned something today! Thanks :)

No problem! :)

What a winning line, LoL. That's great :)

Sorry about your loss, alwld67 -- I learned something too

This question getting asked that often (I've seen at least 50 such threads in the last two years) maybe implies that this should be mentioned when people sign up?
Like: "Note: We use FIDE rules which are NOT the same as USCF rules!"

Also, maybe it would be fairer if the opponent could dispute the decision so that the first player would need to show a winning line. (since it's hard to decide for lichess whether there actually is a winning line)

@MoistvonLipwig

Yeah, I've often (usually in this context) opined that somewhere conspicuous in a menu we should have a "Rules" section.

The Q&A is nice, but something as central as rules should probably have their own very conspicuous place.

On the other suggestion, I've also many times only half-joked that when one side flags, the other side should have to show a sequence of legal moves ending in mate, in their remaining time :)

Of course, that would make basically all time scrambles draws, so my version is a bit draconian :)

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