photon 2d 1v1 game

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hi all,
i've tried a lot but couldn't figured this out yet.
the problem is, i just want to create a 1v1 multiplayer game but game only needs the players guesses, how could i compare two players guesses wtih photon for finding the closest players guess to win.
the inputs are numeric. In all photon tutorials or documentations i've searched but still didn't find.
Thanks a lot.