Puzzle of the week #178

Level: 
4-Rook
Chess Diagram: 

r-bnk--N
pppqn--Q
------p-
---N----
--B-P---
--------
P----PPP
b-B--RK-

It never hurts to practice tactics, or more precisely longer tactics where the solution is unique and like a very narrow passage to victory. Coming up with such calculations is always a challenge and that is the reason why long mates (longer than 4-5 moves) are always special. You can try your hand at a long mate in this wild position. Black has left the King in the center and is surrounded both by friends and foe. Your task:
a) White to move and mate in 10.

Total available points for this puzzle is 20 (2 per each correct move). The answers will be published next week together with puzzle #179.

Puzzle #177 solution:
Game Ing. Ladislau Nagy - Valer Eugen Demian, corr, Timis county 1st Final, ROM 1989-90. I got three good answers: Leo, Daniel and Philip; each one of them got the essence of the position and winning idea for Black. Each one of them also had some mistakes in it, reason why nobody got the full number of points. Here is the solution, a mixture of these good answers and real game continuation:
Philip:
"a) Material is equal. Both have castled. White has a pair of bishop and Black has Bishop-knight combo.  White has nice pawn chain on the left side which Black's is broken. However, Black has a passed d pawn. It's Black's turn to move. I think Black has a better chance of obtaining an advantage."
b) We have the following answers:
Real game continued with:
22... Nxc4 23.Bh7+ Kxh7 24.Qd3+ Kg8 25.Rxe8+ Rxe8 26.Qxc4 Bb6 27.g3 Qe6 28.Qxe6 Rxe6 and Black won easily at move 42.
Philip:
"22...Nxc4 23.Qxd6 ... (if White does 23.bxc4 ... then Black can do 23... Qxg3 24.fxg3 d3+! discover check! Black will win some points for sure.)
23... Nxd6 White's light square Bishop is under double attack.
24.Bf3 Rxe2 25.Bxe2 Re8 Black's a file rook gets into the game. Black is one pawn up and still has the passed d-pawn. Black has obtained an advantage."

Leo:
"22... Nxc4 23.Qxd6 Nxd6 24.Bxd4 Rxe4 25.Rxe4 Nxe4 26.Bxc5 Nxc5 27.Rc1 ... Black will be up by 2 points (one Knight for a Pawn)."
Daniel:
"22... Nxc4 23.bxc4 Qxg3 24.fxg3 d3+ 25.Kf1 dxe2+ 26.Kxe2 Rad8 27.Rxd8 Rxd8 Black has a Rook for a Knight and Pawn and his Rook controls the open file."

Correct solutions:
Leo, Daniel - 18 points
Philip - 16 points
Derrick, James, Alex - 8 points

FINAL STANDINGS:

Philip - 135 points
Ziyao - 111 points
Harmony - 101 points

Leo - 96 points
James, Daniel - 87 points
Derrick - 83 points
Alex - 80 points
Leroy - 60 points
Frank - 24 points

Comment: 

Long mates (1)