 If 2...h3 then 3.Ke7 h2 4.c7 Kb7 5.Kd7 and both pawns promote, with a drawn position.Black has to spend another tempo to the pawn, to prevent the white king from protecting it.If 3...h3 then 4.Kd6 h2 5.c7 h1=Q 6.c8=Q, draw .