Fifth street tax

'Fifth street tax' (stud hi-lo, G1): Scoop and freeroll beat split-hope. Update both halves every upcard.

Bigger bets arrive. If you can't scoop and your half is second-best, folding saves the roll.

Write the plan before calling fourth: what does fifth need to look like to continue? If you can't answer, fold fourth.

Later streets: bricks that kill your low (or their low) change the scoop math immediately. Update both halves every upcard.