Zingles - FREE is a simple yet highly addictive logic puzzle game. Simply complete the board ensuring that each row, each column and each sub-grid only contains one instance of each piece ? a Zingle piece !. At the start of a game a number of pieces are placed on the board. These are known as ?givens?. The remainder of the board contains blank squares for you to complete. You will need to use all your powers of deductive reasoning to solve the unlimited supply of boards that Zingles can generate. Zingles supports the ability to mark each board square with possible moves to aid in the puzzle solving. Zingles also supports the ?cross hatch? marking aid to solving puzzles. Zingles supports a wide range of board sizes offering a variety of game play, from simple 4x4 boards to extremely difficult 16x16 boards. In addition, Zingles supports Jigsaw and Killer Sudoku modes of play. All boards generated are symmetrical and have a single solution making them pure game boards. Zingles also supports the popular game variation whereby the diagonals may only contain one instance of each piece. Zingles includes a lightning fast puzzle solver able to solve any external puzzle. Simply enter any external puzzle and request the solver to find a solution. This product is ad-funded.