Puzzle & Thinking Games · 72

Randomized puzzle generation needs careful constraints; a fresh board is only useful if the system can still guarantee that the problem is solvable and fair. The category's past supplies the companion fact. Sokoban, created in Japan in the early 1980s, makes pushing boxes difficult for one reason: unlike many puzzle actions, a bad push cannot simply be pulled back. The undo button knows more about your confidence than any personality test.