blindmans buff

from The Collaborative International Dictionary of English v.0.48

Blindman's buff \Blind"man's buff"\, Blind man's buff \Blind"
man's buff"\ [See {Buff} a buffet.]
   A game in which one person is blindfolded, and tries to catch
   some one of the other players, and tell who it is.
   [1913 Webster]

         Surely he fancies I play at blindman's buff with him,
         for he thinks I never have my eyes open.
                                                  --Stillingfleet.
   [1913 Webster]