TAQUIN PUZZLE GAME

Game on a grid of 4 × 4 squares with 15 pieces numbered from 1 to 15. These tokens can not move on the board by sliding in the only empty cell at a given time. The game is to put the pieces in numerical order. In this digital version you have multiple checkered 4x4 3x3 and 5x5. LOYD Samuel Famous creator of math games. Chess problems.