Sacrifice to open the king
Objective: White to move. Find the forcing route to checkmate.
Position and task condition
Black’s pieces restrict their own king. White can open lines for the bishops, but every forced reply must be calculated.
FEN
r3qkr1/pp2b1pQ/n1p1Pp2/4nB2/5B2/6P1/PPP5/RN2K2R w Q - 0 1Theme: Queen sacrifice and mating net
Alexander Alekhine – S. V. Gajdukevic · 1907 · Kislovodsk