Range width isn't just a function of position — it's a function of how many players are still left to act. A 9-max UTG open has to survive eight players before the pot is decided; a 6-max table's earliest seat only five. Fewer opponents behind you means a lower chance one wakes up with a hand that dominates yours, so the same "first to act" seat can profitably open a meaningfully wider range on a shorter table — nothing about the cards changed, only the count behind you.

This app ships two separate RFI data sets rather than reusing one and relabeling seats: the 9-max set (rfi:<seat>) and a 6-max set (6max:rfi:<seat>) built as its own approximation of published 6-max shapes. They share only five seat labels — UTG, HJ, CO, BTN, and SB — since 6-max drops UTG1, UTG2, and LJ; 6-max's UTG effectively plays like a hybrid of 9-max's LJ/HJ, not 9-max's own UTG. The seat picker below is restricted to that overlap, and both grids and their opening percentages are computed live from each format's node data, so the delta reflects the real data, not a rule of thumb.