COMBINATION SHOWCASE.....

Background information...
this is a game I played online (correspondence) and was willing to go into the grunfeld defence which my opponent skillfully sidestepped .

please note
- from move 20 the way black uses the dark squared bishop before capturing the trapped rook.
-black uses the passed pawn to force white into passive positions.
moral of the story:
sometimes in chess, one can be excused for delaying a capture if by doing so, one will create weaknesses in the enemy camp.