Hi, i write you about effective stack size post. Im totally agree with you about effective stack should be counted before blinds and antes. I found out a trick that you could use to calculate properly the effective stack. It is using the actions postsb and postbb in action sequence. Here you can set a stack size for bb and sb (stack size is counted before blinds ) so, for example, if you want define fold bb vs sb with 8-12bb you can define two action sequences: 1) postsb (stacksize: min. 8bb) postbb (stacksize: 8-12bb ) sb push bb fold 2) postsb (stacksize: 8-12bb) postbb (stacksize: min. 8bb) sb push bb fold In this way you cover the 2 situations sb vs bb with effective stack 8-12bb. I guess he would work also to bu vs blinds spots , but i still have not test it. Let me know if it worked for you or if you have a doubt. Regards.