data:image/png;base64,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110i121The nested FOR loops are the important part of this solution. Details like the starting position of the sprite might be different in student solutions.-50-50falseX's turn?XOOX5.6.4.3XSecond rule: block opponent's win.Fallback: move somewhere!5.6.4.2This is a place where students are likely to use an unnecessary IF/ELSE block because the solution above seems "too easy" and therefore suspicious. Ideally they should both understand that their solution is correct if it works -- there isn't only one "right" way to write a program -- and that composition of functions enables fairly complicated algorithms to be one-liners when actually coded.5.6.3.75.6.3.5helper for 5.6.3.75.6.2.7X's turn?data:image/png;base64,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101strategicstrategictrue1,2,3,4,5,6,7,8,900