KBP vs K Ending
Here is an interesting ending I ran into while doing my Analyze 3 positions for 20 minutes each exercises. This one is from Manual of Chess Combinations, Vol. 1B by Ivashchenko.
Be careful--you need to keep the opponent's king out of the corner or it will be a forced draw, because white has the wrong colored bishop.
This position illustrates the power of pieces (and pawns) coordinating to control squares, blockading the enemy king from making progress.