The Claim Win button has attracted some controversy recently for a couple of reasons.
It can lead to situations where the winning player determines 2nd and 3rd by deciding whether to play on or 'resign'
It is perceived (wrongly in my opinion) as unfair because it isn't available in normal chess
Currently, Claim Win:
Provides 20 points to other player
Is optional
I propose that Claim Win becomes:
Automatic (on the winning player's turn)
Provides variable points to other player based on material disparities
Points are determined like this:
Losing player's points of material on the board minus winning player's material on the board
For obvious reasons, the points provided could not be less than 0 or more than 20.
Examples
Player A: 60 points (off board), 40 (on board)
Player B: 12 points (off), eliminated
Player C: 30 points (off), eliminated
Player D: 39 points (off), 55 (on)
It is Player A's turn. They automatically claim their win. Player D gets 15 points (55 - 40) and comes 2nd.
Note: For auto-claim-win to be enabled, the other two players must be fully eliminated - none of their kings can be available for capture.