why did this game end?

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ejeleina

https://www.chess.com/4-player-chess?g=2446052

notmtwain

Because you were behind by 20 points and your opponent claimed the win.

https://www.chess.com/forum/view/livechess/you-can-win-4-player-chess-by-resigning

ejeleina

somewhere in this site's messy interface they really ought to mention that 20 point threshold. i've never played before and i wasn't able to find any indication of this rule.