Windows Logic Puzzle Challenge | Easy Championship Training

This is the first puzzle of this type that I created for the practice of the Indian Puzzle Team participating in the World Puzzle Championship 2009. The Windows puzzle is a classic puzzle type. This puzzle keeps on appearing in many puzzle contests across the world.

Today's Windows puzzle is very easy. You can use it for understanding the rules of this puzzle type.

Rules of the Windows Puzzle 

Blacken exactly two cells in each outlined 2x2 window to form one connected set of black cells which does not touch itself, not even diagonally. There cannot be a 2x2 square of four cells with the same colour (black or white) anywhere in the grid.

Windows Logic Puzzle Challenge

Windows Logic Puzzle Challenge Solution

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