Tower of Hanoi — free browser game

Move every disk on the left tower to the rightmost tower in the same order. To make a move, click the source tower (the one whose top disk you want to lift), then click the destination; the same two-step selection works on touch. Keyboard: 1/2/3 or Q/W/E to pick towers, number keys 3–8 to change how many disks you start with, R to reset, Esc to cancel a selection. The single golden rule: a larger disk can never land on a smaller one. Trying an illegal move shakes the target tower as a warning and doesn't count. Solving the puzzle records your move count; the closer you stay to the optimal 2^n − 1 the higher your score, and your best per disk count is saved. Strategy: use the middle tower as scratch space and think recursively — to solve n disks, first shift the top n−1 onto the spare tower, move the largest disk to the goal, then rebuild the n−1 stack on top of it. That recursive structure is the whole trick.