Alibis

I picked up a book by Tony Santasiere, My Love Affair with Tchigorin. At the end of Game 19, a loss Tchigorin suffered to Blackburne at the Berlin 1881 tournament, Santasiere writes the following:

The game was a hard one, with Tchigorin obviously not in the best of form alibis are perfectly justifiable and should be mentioned and kept for reference: A Russian among Germans and playing a Scotsman, the popular time pressure, an ache in the head or stomach or bowels*, temporary stupidity, fatigue, the lights too strong or too weak, the noise (even a whisper has been known to induce a nervous breakdown), the smell of garlic or onions from across the table (more likely whiskey from Blackburne) - and we won't even consider the feminine sex or crying children! No doubt you could make a valuable contribution to this list. Ah - to be a Bobby Fischer, and make demands!

Others to add to this list might include an opponent with a vibrating eyeball, an opponent's intestinal distress, contagious projectile vomiting, and collapsing tables.

* I have had cause to make use of this one, as have other players I know.