Monster Latin Square #1
Rating: Medium
Instructions:
Place the letters A-I into the blank squares of this 9x9 grid so that no letter appears twice in any row, twice in any column, or twice in any 9-square region bordered by heavy lines.
Key to interactive solving:
The bluish squares mark pre-filled squares in the puzzle. Enter letters in other squares according to the instructions above.
Click/Tap “Check your answer” to check your (possibly incomplete) solution. But note that "Checking" a partial solution only verifies that your answers don't violate the conditions of the puzzle — it doesn't check that they match the correct solution! If duplicate letters appear in any row, column and/or region, all squares within the row and/or column and/or region where the violation occurs will be marked by a red border. Use your browser's "Back" function to undo the last check and erase any new red borders. If an entered letter is not between A and I, it will be blanked out.
"Reset" will set the puzzle grid to the last configuration you checked,
valid or not.
"Start over" will clear every square except those given in the puzzle.
Web programming by Matt Crawford.
