Herbert Robert Engel | Mate in 6 | Die Schwalbe, 1973

→ A tricky riddle with a well-concealed solution! White to play and mate in 6. Find the key move.

→ 1. Rf3 h5 - How should White continue? Note that Black has no moves at the moment!

→ 2. g3 fxg3+ - How should White proceed?

→ 3. Kg1 g2 - White to play. Keep going.

→ 4. Nxc4 Kxe4 - How should White continue?

→ 5. Nd2+ Kd5 - How does White finish off the game?

→ What if Black plays 4...Kxc4? How does White continue?

→ 5. Nd2+ Kd5 - How does White finish it off?