This a funny position from one of my correspondence games. Well, funny to me because there was time control of 14d/move for this game and I still didn't see what my opponent could do in the following position, luckily my opponent didn't see it either... I was planning to play either 20.c5 or 20.Rfd1. Well, I ended up playing 20.Rfd1 because I thought I could play c5 on the next move when it would be a stronger move. Obviously I was too obsessed of what I can do in the position so I neglected to see if my opponent has some tricks in his sleeve...

This may be a bit tougher to see than the previous excercises I have posted. I know that some of you will see the correct move almost instantly but I hope that to some, this would be tougher to solve... In my defence by the way, I didn't use all of my given time (14d) to make the move 20.Rfd1?? Maybe I should have used a bit more time and looked harder for possible moves by black.