A 19th century classic by a Latvian composer who was better known for his studies.
1.Bg4 threat 2.Qe4 threat 3.Qe8; 2...fxe4 3.Bd7; 2...c4 3.Qxc4
1...Ka4 2.Qb3+ Kxb3 3.Bd1
Rauf Aliovsadzade: Easy to solve but nevertheless key and threat are wonderful.
Guy Meissonnier: If 1...Ka4 then 2 Qb3+!! with a splendid switchback! What a marvellous chess problem!