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authorBenjamin Franzke <benjaminfranzke@googlemail.com>2012-11-08 13:17:20 +0100
committerBenjamin Franzke <benjaminfranzke@googlemail.com>2012-11-08 13:17:20 +0100
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Prisoners Dilemma: Move rules to subdirectory
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+% Hard Tit for Tat:
+% Cooperates unless the opponent has defected
+% at least once in the last two rounds.
+
+hard_tit4tat([A,B|_],d,_,_):-(A=d;B=d),!.
+hard_tit4tat(_,c,_,_).