I guess this might be a bit of a long shot but here goes:
How about providing an absolute hand ranking (of all possible starting hands) to a hand on the river (or any street, equity based or current made hand value).
So on AAAA2 board any Kx would be 1, Qx is 2, down to 3x (11) and 22 which is 12. Then normalize the values between, say 1-100?
