Phony Benoni: <38...?>
click for larger viewBlack went for the notorious Rook + f&h-pawns against rook ending, playing <38...h5+ 39.Kxh5 Rxg3 40.Rxb4>. The ending is drawn, but needs care. Black played it well for the next few moves, keeping his rook active at a safe distance from the White king, preparing to check on either file or diagonal (the key to the defense in many rook edings). It begins to fall apart when he brings the rook to a more passive position on the eighth rank, Tablebase granting White a win after >51...Rg8>. The final position, after <55.Kg4>: 
click for larger viewis a win for White -- but instead he offered a draw!
With the Black rook immobilized, White will be able to drive Black's king back to the point of no retreat. A key for White (should Black take on j7) is to be able to get his king to the -e-file, where he can outflank and enforce promotion. A possible line: <55..Kg6 56.f5+ Kf6 57.Rh2!> (not 57.Kk4? Rxh7!) <57...Kg7 58.Kg5 Kf7> (58...Rxh7 59.Rxh7+ Kxh7 60.Kf6 and 61.Ke7) <59.f6 Kf8 60.Kg6> and it's all over. This is a very simplified analysis. The ending is really not this simple, and both sides must know what they're doing to play it well. | 
Kibitzing
