Not sure what you mean with “after undo is granted” …
But it made me think that maybe an option to allow undo only for so-and-so many seconds after that move was made might be an idea? (For ranked live games, not correspondence, of course.)
I don’t exactly know how quickly a misclick is realized for others but for me it is within a second. So … maybe give them five seconds to click “undo”?
This sounds pretty reasonable.
I think it’s possible that someone misclicked but only realized it 5 seconds later.
Also if you undo after 20 seconds, it’s your opponent to decide whether to grant you undo or not.
However, it’s impossible for someone to use more than 5 seconds just to remember where he actually wanted to click. It will be really rude to spend a long time after undo is granted.
The time limit after the undo is granted makes perfect sense to me. Before…maybe if there’s a keyboard shortcut it would make more sense to me in particular, but I wouldn’t oppose.
Another idea/suggestion: Would it be crazy to store the undos as part of the game record?? (as variation branches)
Yes please! This would be useful to me even in absence of bad behavior. So often I look at a game with a friend where we are discussing a mistake, but no evidence of what the mistake was because we undid it!
Ah, now I understand, thx!
Omg this is perfect
don’t
Sometimes my opponents not understand what Chinese rules are because they usually play Japanese. So they pass instead of taking liberty and win by 0.5. I explain and tell them “please click undo”. Then I accept.
To undo or not to undo should be between players.
Similar anecdote, in club games I do the most undos. Often I need to send a variation or two to explain why the move was incorrect. Undos not just for misclicks!
How about playing in Zen mode? I’m not aware if the undo requests appear while using it, but I think they don’t, since it’s defeating the point of using Zen mode.
I think that that the “?” will show up on the last move, though I admit I’m too lazy to try it out to see…
Yes. The ‘?’ shows up to indicate an undo request in zen mode. Note however that this can be disabled in settings.
This started off with a post about someone asking for undo and then being rude when it was not granted. I once faced the opposite situation. I was playing over-the-board with friend who was about 5 stones stronger than me at the time (only two stones stronger now, hehe). I played a killer shortage-of-liberties tesuji by accident that flipped the result in my favour. My friend praised my excellent play enthusiastically. But, being a DDK at the time, I did not realize how good my tesuji was and I thought I had just broken through their wall to reduce their territory a little. So I played elsewhere rather than complete the tesuji, not realising that one more move would capture a big group and effectively win the game. When I did that, my friend said “No, no, no, no! I cannot let you do that. You must take that move back and play over here.” Forced undo, LOL.
Sadly, I have made a similar mistake against the same friend just yesterday - played a killer tesuji, misread the follow-up. Thankfully, this time it only cost me 2 points and I’m more than 10 ahead with only a handful of moves left to play. Phew!
I played a game yesterday with someone either weaker or about my strength and I allowed 3 undos… Lol One was a bit questionable but what the hell.
We need to have it as part of the game history where undo were accepted and given. Kind of like a undo tree. : )
^^^ good idea!
Interestingly, if you undo back to the start of a game the ‘cancel game’ option reappears.
So theoretically if two players wished to annul their game (before it was over) they could do so without asking a mod for help.
“Hey, we started this game by mistake, we hate the time setting, could you annull it please?”
“Oh, just undo all the way back and cancel, see you later” 
Writing the auto reply bot now 
