Sudoku

Sudoku is a single player puzzle game. The game is played with nine grids. Each grid contains nine squares arranged in a 3x3 formation as are the nine grids themselves. The program fills numbers into some grids and the player has to put the right number into all the remaining squares. In every square, vertical row and horizontal row every number of 1-9 has to be there exactly one time. Though numbers are used they are purely used as symbols, the game requires logic, not maths, skills to complete.

This game has 1,000 puzzles grouped into three difficulty settings, puzzles 1-334 are easy puzzles. 335-667 are medium difficulty puzzles and 668-1000 are classed as hard. When a puzzle has been completed it is marked with a tick, one that is in progress is marked with a circle. Games that are part completed can either be restarted or resumed.

The game area consists of a single 9x9 grid. Below the grid are the numbers 1-9 which the player selects with the mouse. The player selects a cell within the grid, and then selects the number they wish to place in it. Numbers can be entered in two ways, in pen or in pencil, which mimic the way the puzzles are played on paper.

This game features hint and cheat functions, duplicate number warning function and a 'dim entered numbers' function which effectively highlights the valid numbers for a given cell.