I'm not sure X/F is an option on river but is this hand better to just shove on river?
PokerStars - $0.05 NL FAST (6 max) - Holdem - 6 players
Hand converted by PokerTracker 4
BTN: 119.6 BB
SB: 109 BB
BB: 154.4 BB
Hero (UTG): 210 BB
MP: 411.6 BB
CO: 112.4 BB
SB posts SB 0.4 BB, BB posts BB 1 BB
Pre Flop: (pot: 1.4 BB) Hero has Q

K
Hero raises to 2.4 BB,
MP raises to 7.2 BB,
fold,
fold,
fold,
fold,
Hero calls 4.8 BB
Flop: (15.8 BB, 2 players) T

4

J
Hero checks,
MP bets 8 BB,
Hero calls 8 BB
Turn: (31.8 BB, 2 players) 9
Hero checks,
MP bets 19.6 BB,
Hero raises to 52 BB,
MP calls 32.4 BB
River: (135.8 BB, 2 players) 4
[color=red]
Hero ???