The diagram below is a type of position that is continuously spilling my rating points due to my talent to find the wrong squares. Let's see if we can expel some calculation by logical pondering.
|Diagram 1. Black to move|
6r1/1p1b3p/3P4/2P2k1P/1P2p2K/5B2/5P2/4R3 b - - 0 1
The last move of white was 1. Bxf3, taking a pawn.
Feel free to comment already. That makes it easier for me to get to the essence of the position, since you guys think differently.
UpdateAfter 2.exf3 Re7 we reach the position that gives the most problems. How to judge it? Materially, black has a bishop for two pawns.
Let's have a look at the critical position.
|Diagram 2. The critical position. Black to move|
|Diagram 3. Black to move|
After 4. ... Rg4+ 5.Kh3 Rd4 black can pick up the passed pawn in due time. When white is robbed of his protected passed pawn, blacks extra bishop starts to count. When the rooks are traded, it is over. As you see, it wasn't necessary to keep the criminal behind lock and key. Mere police surveillance was enough. Due to the mate threat.