Logical Colors
A Logical Colors puzzle consists of an array of colored blocks. The color of most blocks can be changed by touching them. However, a few of the block...
Dale Lindle
CribbagePlus
Play the classic game against an Artificial Intelligence opponent.Choose between four computer skill levels from novice to expert. Or, let your AI opp...
MathChallenges
MathChallenges is a collection of widely varied math puzzles and logic problems created by Theoni Pappas (author of The Mathematics Calendar) and Dale...
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