SAVANT SWITCH
One tap changes more than you think.
Savant Switch is a free daily lights puzzle. Tapping a tile toggles that tile plus its immediate up, down, left, and right neighbors. Use undo, restart, and optional hints to turn the complete board off.
Play Savant DuelHow tiles change
Diagonal tiles never change, and neighbors outside the board are ignored. The rules work identically on corners, edges, and center tiles, with text labels that expose each tile’s current state.
Solvable and minimum-checked
Every board begins from all-off and is changed with legal moves, so it is always solvable. A complete shortest-path table verifies the displayed minimum and powers hints for the player’s current board.
Daily result and fresh practice
The shared puzzle is stable for the complete UTC day. Practice creates a different valid board and saves progress in a separate namespace.