White to move
White has a clear advantage, but I did not know it. Indeed, before the rooks were exchanged, I thought my opponent (Black) had found the way to win a game that I was trying to draw. He sought the pawn break from this position.
Black to move
We had reached this position twice, on moves 23 and 25. The second time, he opted for 25...f5. There were several possibilities, but we reached the position in the first diagram after 31.Rxd7 Kxd7. There, we have a position that will not be drawn. One of us will be in zugzwang when the other runs him out of pawn moves. Calculating such things with the rooks and a knights on the board is very difficult.