critical first move

In the position below with white to move, 1.h5 fails



See Game 1927966

After the correct 1.Kd7, OTOH both players will be able to promote a pawn, but 3...a3 is a mistake for black. See Game 1929469.

After the correct 3...axb3, white must play correctly to maintain the advantage. Game 1928000 offers an example of incorrect play.

The position is attributed to Josef Krejcik. Does anyone know more about him?

Originally posted by Wulebgr
Game 1928000 offers an example of incorrect play.

Correct play, on the other hand, is evident in Game 1930122.