If you say

if (%slotmachine1 == %slotmachine2) && (%slotmachine2 == %slotmachine3) {

You don\'t need to add: if (%slotmachine1 == %slotmachine3)
Ofcourse they\'re the same then.

One more thing: You don\'t need to add / for a msg, notice, set, ...
Also, nice that you add a flood protection :)