Misere Nim

□■ Three levels of playability! There is a level for beginners and an undo function. In the highest level, one mistake can be fatal! Can you capture this game? □■ The key to victory is memorizing the winning patterns! Find the winning patterns with a small number of pawns and increase the number of pawns little by little! And, high level computers will always try to find the best solution. So, try to imitate the computer's behavior!