Puzzle of the week #221

Chess Diagram: 

[Event "Puzzle #221"][Date "2013.03.18"][Result "1-0"][SetUp "1"][FEN "8/3b4/k2p3P/1p1K3P/1P4r1/8/3R4/8 w - - 0 1"]

A position with passed pawns becomes sharper as they advance closer to promotion. Even the double pawns are dangerous if passed; when one disappears, the other one is still there to stir trouble. Having them on your side opens up all sort of unexpected combinations, one more beautiful or skillful than the other. Your tasks:
a) Find the main threat White can use here
b) Using the main threat discovered above, prepare the best winning line for White

Total available points for this puzzle is 20. The answers will be published next week together with puzzle #222.

Puzzle #220 solution:
Game Nimzovich – Taubenhaus 1913, sideline. This is a typical IQP position. White has lots of space to launch an attack and as expected the most dangerous one is against the Black King. Black actually invites the attack to come, wishing to prove its defence is going to hold. In such positions you should not wait for the invitation and if it occurs anyway, accept it! Here is the best analysis:

[Event "Puzzle #220"][Date "2013.03.10"][Result "1-0"][SetUp "1"][FEN "r3nrk1/1b2qppp/pp2p3/3nN3/3P4/3BB3/PP2QPPP/2RR2K1 w - - 0 1"]1.Qh5 g6 2.Qh6 Ng7 3.Bg5 f6 4.Bxg6 hxg6 5.Nxg6 Qd7 (5...Qd6 6.Qh8+ Kf7 7.Qh7 fxg5 8.Ne5+ Ke8 9.Qxg7 Qe7 10.Qg6+ Kd8 11.Rc6 {Is black surviving versus this attack? It did not at the time when the game was played}) 6.Qh8+ Kf7 7.Qh7 Ke8 8.Nxf8 Qf7 9.Ng6 {White's bishop cannot be captured and white wins}

Correct solutions:
Daniel, Justin, Richard - 12 points
James - 8 points
Derrick - 7 points
Aditya - 4 points

Daniel - 107 points
James - 94 points
Derrick - 89 points
Richard - 87 points
Leo - 64 points
Justin - 55 points
Aditya - 24 points
Jerry - 12 points
Alex - 7 points