What is every hand worth on a 2 4 7 rainbow flop?

The 2 4 7 rainbow flop is about as dry as poker gets. There is no flush draw, no open-ended straight draw using two connected big cards, and no way for a random hand to have flopped a straight. That scarcity of draws is exactly why made hands hold their value so well here: when you are ahead on this flop, very few turn and river cards change that.

Overpairs are the big winners. Pocket aces, kings, queens, and even eights are miles in front of a random hand, because the board offers so little help to the hands behind them. The three flopped sets are near locks, and the only real danger they face is the runner-runner straight or backdoor flush that a random hand rarely gets there with.

The trap on this texture is the middling unpaired stuff. Two broadway cards like KQ or AJ have completely missed, and whatever value they keep comes purely from unimproved high-card strength. KQ actually falls behind a random hand here, and AJ scrapes barely ahead, a long fall from where both stood before the flop.

The common mistake here is over-folding small pairs and under-folding big cards. A hand as ugly as Q4 offsuit has flopped middle pair on this board and beats a random hand comfortably, while good-looking hands like AK gain almost nothing from this flop. On dry low boards, pairs are king and paint is a promise.