How to solve the Sudoku 25×25

Fill the 25×25 grid so that each column, each row, and each of the nine 5×5 regions contains the letters ABCDEFGHIJKLMNOPQRSTUVWXY, only one time each. Solution is unique.

More information on Wikipedia.

Interactive Sudoku 25×25:

First of all, click on the grid to activate the Java applet. Then you can start playing, using the arrow keys or your mouse to move all over the grid and to select a single square.

The three buttons on the left are for:

• Deshacer: clear all the letters you have placed in the grid.
• Número: reveal the letter of the selected square.
• Solución: show the solution for the Sudoku 25×25.

If you consider you have placed a wrong letter in a specific square, select the square and rewrite it with a new letter, or clear it using your keyboard Delete button.

And that’s it… easy to do.

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