Claim checker

A claim is valid when the claimer has a line that wins the tricks claimed however the cards they cannot see are placed, not just with every card on view. Load a hand, go to any point in the play, and try a claim for declarer or either defender. How it decides.

Everything runs on this device, and the hand never leaves it. Each check records an anonymous timing: how long it took and how many cards had been played, with no identifier and nothing about the hand. Add ?nolog to the address to turn that off. Privacy · Benchmarks