Incorrect Draw by Threefold repetition...

I played a game and it was ended as a draw by LiChess. I believe it was only a two-fold repetition:

Thoughts?

Steve

The last pawn move was 26... c6. After that there is 27...Kh6. The king moves away with 30... Kg7 and back with 31... Kh6 — but that's only repeating the position once i.e., two-fold repetition. It needs to be three-fold for a draw. Seems like a bug.

— Steve

27-29-31.

After that there is 27...Kh6. The king moves away with 30... Kg7 and back with 31... Kh6

Since you're probably confused...it's only the position that matters, not position + last move. So you don't need to have a 3rd king moving to h6, because it's already there. It's the queen that wasn't in g6 that moving to g6 triggers the draw.

@Deadban said in #3:

27-29-31.

I think it would be good if Lichess highlighted the moves where the position was repeated, because these kinds of posts seem pretty common.

Also, funny story: Once I was at an OTB chess tournament, and I claimed a draw by repetition against a higher rated opponent but the TDs couldn't accept it because I showed the wrong moves on my score sheet (the position had repeated three times, but at different points in the game than I showed). The game went on and was eventually drawn anyway, but lasted 5 and a half hours and was the last game to finish in that round! I even had a couple chances to win, but I was low on time and miscalculated that they didn't work.

I think it would be good if Lichess highlighted the moves where the position was repeated, because these kinds of posts seem pretty common.

I like this suggestion. You should probably make a topic on github.

@AsDaGo said in #5:

I think it would be good if Lichess highlighted the moves where the position was repeated, because these kinds of posts seem pretty common.
... and pretty cute. Wouldn't miss them.

@AsDaGo
Your anecdote also hints at a difference between online and OTB chess: OTB, the player has to be vigilant himself to spot the 3-fold repetition, and be careful not to make a wrong claim, which would be rather embarrassing I guess.

In online chess, especially in bullet and blitz, sometimes both players are surprised when the computer highlights the option to draw by 3-fold repetition (;.

Not only embarrassing...but time-consuming.

I once made a false claim. Your clock ticks on while the TD investigates the claim...and if he finds it invalid, you have that much less time left.

@Sybotes said in #7:

... and pretty cute. Wouldn't miss them.
Don't worry. They wouldn't disappear.