After that 90 minute session and a little break (some food, some TV), I went for a 55 minute session on endgame-puzzles.(My coach reinforced his claim that the most important to improve my chess is to work on these puzzles on a daily basis!) I solved one and did a recap on 3 I solved about two weeks ago. Let me share the one I solved by starting with the elementary rule of the key squares in order to identify if a pawn-ending is won (or not):
In the puzzle I went after this evening, the above rule needs to be applied in one of the main variations:
It is White to move - and to draw!