River calls need a hand

'River calls need a hand' (seven-card stud, G1): Live/dead upcards are half the hand. Count before fifth gets expensive.

Seventh: value thin when boards don't support them; bluff less into sticky stud populations that call one more street forever.

By seventh you either have a showdown hand or you don't. Calling river 'to see' with ace-high vs consistent strength is donating.