CalcuDoku

Flash player support

Due to deprecation of Flash at the end of 2020 we are converting all our games to HTML5 which is supported by all popular browsers. We are planning to complete this process before the end of 2019. In the meantime, in case you have problems enabling Flash on your browser please see these instructions

CalcuDoku tutorial

This lively educational program provides a quick and easy way to understand how CalcuDoku puzzles should be solved. Using Flash™ animation, the 56 step movie presents a QuadOp CalcuDoku 5x5 puzzle being solved from beginning to end, one-step at a time.