fifteen

seed

moves

315f5bdb76d078c43b8ac0064e4a0164612b1fce77c869345bfc94c75894edd3

21 Feb 2022

Begin with the initial 15 puzzle, where numbers are arranged in a 4x4 grid starting at 1 and increasing to 15. The last square is left empty.

For each of the bytes in moves, split into four 2-bit pairs and use each of them to encode a single "move" N/E/S/W.

For each individual "move," go to the empty space and attempt to grab the tile in the N/E/S/W direction. If there is no tile there (such as, if we are along an edge), skip the move.

After each valid move, draw the current grid on the canvas. Use "black" for the empty square, and increase the lightness for each tile (tile 15 being white).