The Subtraction Game

The Odd Subtraction Game


Starting Player:

Blue Total:
Red Total:

Winner:
  • Click on to start a new game.

  • Enter the starting number of circles in the stack.
    Start with an odd number:
       Number of Circles:

  • Enter the maximum number of circles that can be taken on each turn.
       Maximum Number:

  • Select the winning condition.


  • On your turn, click on a circle to remove it and the circles to the right up to the maximum number. Click on to undo.

cvh

© MYMathApps

Supported in part by NSF Grant #1123255