Ask HN: What is the most challenging project you have ever worked upon?
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For me, trying to implement an unbeatable tic tac toe game using the minimax strategy. I promised myself I wouldn’t look up any hints online outside the Wikipedia page on minimax. It was several weeks of call stack overflows, reading through logged game states, and waking up at night to try ideas. The code for the final result now looks so simple and elegant, but it’s very deceiving.