IMO, genuine misclicks in bidding are rare and not unmanageable. Recognizing slips of the mouse from a change of mind isn’t too difficult. If a player has a 12 point 5 card spade suit and clicks 1nt but tells me they intended to click 1
♠ (1nt/
♠ are adjacent in the bidding box), or a pair has been in a heart auction and a player misclicks 6
♠, intending 6
♥ I will give an undo automatically. Not doing so and having players forced to play in an obviously wrong contract is simply silly and damaging to the rest of the field.
OTOH, if an auction goes 1
♠ (P) 1N (all pass) and the 1nt bidder with 15 points tells me he misclicked and intended to bid 2
♣ (that’s 2 misclicks for a start) I explain the laws and leave them with their bottom board.
Sometimes the ‘misclicks’ aren’t as clear and you need to use your judgement, at times you need to monitor the rest of the auction to ensure no UI is used – this is much more fun than replacing missing players and also, its your job.
If you are running large, speedball type games you wont have a hope in hell of doing much more than subbing missing players. Make it clear in the tournament description that no undo’s for bidding or play are allowed and refer any complaints there
“It is not because things are difficult that we do not dare, it is because we do not dare that they are difficult.”
"You need to play a lot of stuff these days just to deal with the stuff your opponents are playing" DBurn