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Start with any number of counters in any number of piles. 2 players take it in turns to remove any number of counters from a single pile. The loser is the player who takes the last counter.


A new card game for two players.

FEMTO: Follow Up

Follow-up to the February Game Rules of FEMTO.


Age 14 to 16
Challenge Level

Sample Board

Turnablock is a very simple game for two players invented by John Conway. It is played on a 3 by 3 square board with 9 counters that are black on one side and white on the other.

The counters are placed on the board at random, one per square, except that the majority must be black uppermost.

Players take turns to reverse all the pieces in a block (e.g. $1 \times 1$, $2 \times 3$ or even $3 \times 3$). The object is to have all pieces white uppermost on completion of your move.