This is brilliant.  It took me a minute, because I thought I would advance the pawn and use the bishops to force check.  I got it wrong, and I figured planning to advance the pawn was the best move.  Nice work on White's part.

very nice puzzle :D

nice

A good puzzle.

Nice

Nice

not too bad

good

easy

it makes n0 sense.... ill just sac my r00k and the bish0p and knight will be 99% draw under FIDE-50 m0ve rule because its just very hard t0 mate with 0nly th0se pieces...

good puz

a little harder

very good

 very good...

Very nice

With correct play, a KBN vs K endgame that is not immediately thrown away (for example, a hanging Knight trapped by the enemy King at the edge of the board) can be won in 33 moves or less (source: Muller and Lamprecht, Fundamental Chess Endings). It's a good endgame to practice even though it occurs infrequently in actual play: it teaches you how to coordinate your pieces for maximum effect --- in this case, control of squares to drive the enemy King to mate in either of two corners. I'm not great at it, but I can win it within 50 moves.

Q vs R is also normally a won endgame, but I haven't practiced that as much yet. Hmm, sounds like I've got some homework to do... 

good one

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