[sideshowb]

I learned on Windows and 1. Never guessed if avoidable, 2. If guessing always considered both odds and potential reward for each option, at least heuristically. I feel in this context for saying "never" you deserve to click a mine ;-)

[brandmeyer]

> 2. If guessing always considered both odds and potential reward for each option, at least heuristically.

Same here. To add a pinch to this, say there are two regions of the visible board that must be answered by guessing. If one has 1-in-3 odds of failure, and the other has 2-in-3 odds of failure, then make the guess on the one with better chances.