@drew excellent game! I heard about it from @alisonkiddle and wrote a blog post about it here where I investigated whether the dice roll like regular dice: https://aperiodical.com/2013/05/ox-blocks-probabilities/

Also it’s the featured object in this podcast with @stecks here: https://aperiodical.com/2019/12/mathematical-objects-ox-blocks/

Ox Blocks probabilities

I have a new toy. ‘Ox Blocks’ box promises “Noughts and Crosses with a novel twist”.

The Aperiodical