Nikalai (Nikolay) Dmitrievich Grigoriev (Russian: Никола́й Дми́триевич Григо́рьев) was a Russian chess player and a composer of endgame studies. He was born on 14 August 1895 in Moscow, and he died there in 1938.

Grigoriev competed in various internal Soviet tournaments. His tournament victories included: the Third Chess Championship of the Trade Unions 1928 and he divided the 1-2nd places with Peter Romanovsky in the international Workers' Congress in Leningrad.

Grigoriev became better known, however, as a chess organizer and educationalist, chess journalist and problemist.

Grigoriev composed more than 300 endgame studies. He is especially noted for his prolific output of pawn endgames with only kings and pawns on the board, where he had no equal. In 1935, the French magazine La Stratégie organized a tourney for endgame studies with two pawns against one, and Grigoriev ran away with ten of the twelve awards.

SOURCE:  http://en.wikipedia.org/wiki/Nikolai_Grigoriev

If you have not already checked out my K+P vs K and K+P vs K+P blogs please do so, you will pick up a lot of "tips" applicable to these puzzles below. To see alternate lines click on "solution" and then click on "move list." I recommend you do so even after solving each puzzle in order to see any alternate lines or comments.