“With major pieces (queen or rook) on the board, having bishops on opposite colors favors the side with an attack.”
A couple of nice articles about these principles can be reviewed HERE and HERE
SIM Michael R Freeman is a very strong ICCF player from Darwin, New Zealand. The fact he has been able to perform at around 2500 correspondence chess rating since 2009 is a high accomplishment not many are capable of. He is also FIDE-CM over the board and this summer he had the opportunity to play in the 8th IGB International Seniors Open Chess Championship 2017, Malaysia. Michael was kind to share interesting positions from his games along the way and I liked one in particular. The position was extremely interesting and the additional thoughts and comments by Michael caught my attention and made me take a closer look. We also had a very instructive online discussion about it; in the end can say for sure I learned more about opposite bishops endgames. Here it is with comments as indicated:
Of course Mednis principles apply here perfectly. White was pressing all along and that opened the door for a nice ending. Personally I think this is also an excellent example of how we need to pay attention to what is going on until the opponent has signed the scoresheet. Michael could have been rattled by the missed chances or by the tough defence he had to face up to that point; also he might have thought this was a done deal with those 2 passed pawns ready to promote. Any of us in his shoes would have had to consider 1… Bc5 as the best reply and gather our last drops of energy to figure out the winning idea with Bb5 hanging. He did it and was rewarded for it. Below is the full game score. Thank you Michael for sharing it with us!
Valer Eugen Demian