Detailed description of the 15 Puzzle – Collect numbers

We present to your attention the classic version of the game 15 Puzzle - Collect numbers. Exactly the way it was invented in 1878 by Noah Chapman. We have added only difficulty levels and an auto build feature. The assembly function is intended, first of all, to check the collectibility of the required combination of numbers, if you suddenly have doubts. There are no uncollectible combinations in our game.