Every move must be 100% logically deducible, your reveal order determines the next expansion. If you guess, a loss will be forced in the verification stage at the end.

Click any node in the history tree to rewind and try a different reveal order.

After rewinding, match your cursor position and buttons to what it was to resume playing.

Some seeds have no guess-free solution. If all paths require guessing, the seed is unwinnable.

It is more advanced than meets the eye.