Pentago Remix

The Mensa-award modern classic, you (white) versus a tactical CPU (black). A turn has two parts: place a marble in any empty hole, then twist one of the four 3×3 quadrants a quarter turn — clockwise or counter-clockwise. The whole board shifts under you. Line up five in a row (horizontal, vertical or diagonal, freely across the quadrant seams) — checked after the twist — to win. Careful: a careless twist can spin the CPU's five into place and hand them the game.