The Mathematical Garden

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Games
Black and White
HEX
Magic
Mark Six
Recursion, Games and Strategy
SIM
the game
an example
a question
the proof
How to win
SIM and pigeonhole
Ramsey's Theorem

An Example

In this game, both Player One (red lines) and Player Two (blue lines) have made six moves. If Players One now choose DE, then Player Two is forced to choose either EF (and lose by completing triangle BEF and triangle AEF) or CD (and lose by completing triangle BCD).

Department of Mathematics, HKU, 2010