Veteran GM Portisch demonstrates a long patient massage with the bishop pair finally winning in a BB vs BN endgame.

Portisch,Lajos (2625) – Hernandez Onna,Roman (2460)
King’s Indian Classical 6…c5[E91]
Las Palmas (8), 1976

Position 1
The bishops dominate the board and white is ready for the kill. What do you suggest for white?

White to Play