[Community Puzzle] Merlin's Magic Square

Coding Games and Programming Challenges to Code Better

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Created by @Lisa-Has-Ideas,validated by @Konstant,@Remi and @Rafarafa.
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I know I must have solved it some time ago.
That’s it - Coding Games and Programming Challenges to Code Better

Very similar, yet not the same. Here I could invoke the great wizard ‘Xor’. In the other puzzle the grid size could be too large for this approach.

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And also (as I understand it), each button in that “Very Hard” puzzle all have the same effect.
In This puzzle here, there are 3 different effects based on the location of the button on the square.

The real difference is that you have to find only one button in this puzzle, whereas you a to find a real solution in the other, and with a variable size. That makes the difficulty “very hard”.

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Merlin Magic square solution is a easy one or difficult.