re: Poker & $100 NLHE Full Ring: Villain lets me decide his play.
You said there was a raise to £4, then villain raised to £12 and you shoved for £43 total? So there's £61 total due the blinds.
So he's calling £31 to win £61. We are getting to "choose" his action, so all we have to do is compare the EV of "making him" call or fold. We have 66% equity against a random range. If he folds, we win the £61 in the pot 100% of the time, so EV(fold) = £61. If he calls, there's £92 in the pot, which we win 66% of the time. We don't have to put any more money in when he calls so:
EV(he calls) = (.66)*(£92) = £60.72
So if he calls, it's almost the same... Not a big difference. Personally I'd take the fold even if we gained some EV, for the lower variance. But also, doubt we necessarily get him to do what we want?
Edit: Missed the initial raise to £4, so I had to fix some numbers. Should all be right now.