20
" Ridcully sighed.
'All right, you fellows,' he said. 'No magic at Table, you know the rules. Who's playing silly buggers?'
The other senior wizards stared at him.
'I, I, I don't think we can play it any more,' said the Bursar, who at the moment was only occasionally bouncing off the sides of sanity, 'I, I, I think we lost some of the pieces... "
― Terry Pratchett , Reaper Man (Discworld, #11; Death, #2)