Closely related to this thread...
Harrington does adjust to shorter tables and ante's with his Effective M.
The way I calculate it I don't have to do anything fancy. I can not remember ever thinking I had 12.835 M. 12 or 13 will do fine. Even tho the dif in that case is 8% (ish), I don't think the 8% applied to that decision to shove is significant.
I check the pot size before betting starts but after blinds and ante's are posted, and figure out how many times my stack goes into that number.
I don't have to do any fancy addition of the antes, because all ONLINE sites show the pot size at all times.
When there are ante's, my contribution per orbit is the same as the number of players remaining at that table. Tables change as well, and all I have to do is when the table changes, I re-evaluate my effective M.
Sounds way more complicated than it is. However, the same info is available via ABB, and the .67 thing (2/3 thing is easier mentally). But apparently the result of the 2/3 pot is used to calculate something else.....What is that something else?