Who tried to solve Tarski's circle squaring problem?

Answer 1

pie r squared

Brilliant as this above answer is, just in case someone out there might want the real answer: The actual problem was totake a disc in the plane, cut it into finitely many pieces, and reassemble the pieces so as to get a square of equal to the area. This was proven to be possible by Miklos Laczkovich in 1990; the decomposition makes heavy use of th the axiom of choice and is therefore non-constructive. Laczkovich's decomposition uses about 1050 different pieces.