Assume only two players, always keep multiple of N+1 for the oponent (N=3 here). For example, if you leave 4 then you will always be the last one to erase the rest of the point(s) and will be the winner.
Assume only two players, always keep multiple of N+1 for the oponent (N=3 here). For example, if you leave 4 then you will always be the last one to erase the rest of the point(s) and will be the winner.