25 ms·It is, and as an amateur player I find it a very frustrating rule to play by.by Retr0id 2y agoIt is, and as an amateur player I find it a very frustrating rule to play by.sapiogram 2y agoWouldn't it be even more frustrating if your opponent was constantly picking up pieces when thinking?Retr0id 2y agoI can't say I've ever had that problem while playing chess (even without the rule), but if I did, I'd ask them to try doing it less.