Sudoku Expert II

The key function of SudokuExpert is the ability to save snapshots of the game. A SNAPSHOT (aka. check point) is a saved copy of the current game state. This innovative feature makes it very easy for the player to navigate through the solution tree. It is very handy when trying different numbers in a cell that doesn't have an obvious answer.

HOW DOES SNAPSHOT WORK

Before trying out a number for a cell, you can take a snapshot. Later when you find that number doesn't work, you just need to simply restore the game to the previous snapshot and then you can try the next possible number. For example, if Cell A could be 1 or 2 and you can't determine which number is the right one at this time, you can save a snapshot and then try number 1 first. Later if you find #1 doesn't work, you can simple restore to the snapshot and then try number 2 in the same cell (Cell A). You can keep doing so for as much as necessary.

Please read the Help document in the game for more details.