%%% EX 11 - AlphaBeta Pruning
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-10pt: missing pruning operation under the last by one min node.

%%% EX 12 - CSP
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Correct.

%%% EX 13 - A*
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Correct.

%%% EX 14 - Planning
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Correct.

%%% EX 15 - LRTA
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-10pt: wrong knowledge update.