Comments on "Best conventional solutions to the King's problem"
  Conventional solutions to the (Mean) King's problem without using entanglement have been investigated by Aravind [P. K. Aravind, ``Best conventional solutions to the King's problem'', Z. Naturforsch. 58a, 682 (2003)]. We report that the upper bound for the success probability claimed there is not valid in general, and give a condition for the claim to be justified. 
Gen Kimura, Hajime Tanaka, Masanao Ozawa