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FEMTO

A new card game for two players.

FEMTO: Follow Up

Follow-up to the February Game Rules of FEMTO.

Yih or Luk Tsut K'i or Three Men's Morris

Some puzzles requiring no knowledge of knot theory, just a careful inspection of the patterns. A glimpse of the classification of knots and a little about prime knots, crossing numbers and knot arithmetic.

Nim

Age 14 to 16
Challenge Level


Describe the strategy for winning the game of Nim. The rules are simple. Start with any number of counters in any number of piles. Two players take turns to remove any number of counters from a single pile. The loser is the player who takes the last counter.