I found a 6D game, allowing surrender after splitting Aces vs 2-10. The game is ENHC, thus the surrender is early. I put some efforts to calculate the effect of this rule on the house edge. I used the following strategy: one surrenders all split hands having totals 13 through 16 vs 8-10. My calculations include 1 split only. Resplit of Aces is allowed to 4 hands, but I don�t have the energy to go that deep, besides, because of the low frequencies of resplit hands, the impact will be insignificant. The calculation results turned out too promising. According to them, this rule will lessen the house edge by 0.17%. It looks too good to be true.
Any opinion will be appreciated.