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|Angela and Otto Janko|
|Puzzles, games, and Java applets on logic, number, and chess. See also the Jankos' Retrograde Analysis Corner, analyses of legal moves in chess, and translations of Inaba Naoki in the Puzzle Laboratory.|
|Levels:||Middle School (6-8), High School (9-12), College|
|Languages:||English, Spanish, French, German, Italian|
|Resource Types:||Games, Problems/Puzzles, Web Interactive/Java|
|Math Topics:||Number Sense/About Numbers, Discrete Math, Logic/Foundations, Number Theory|
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