Move one match to make a square

[johnthan]

Solve this old matchstick puzzle.

You have to move only one match to make a square.

Four matchsticks here which form plus sign. You have to move one match to make a square.

   

[johnthan]

The answer is not simple as other matchstick puzzles are.

Here in this puzzle, you have to move the left matchstick slightly to generate a gap, which is actually the answer of this puzzle.

See image below, in the middle gap (a square).