Puzzle of the week #54

Darren has been doing some very good puzzle solving work in the past couple of months. A few times his solutions have been chosen as the most interesting ones and have been posted here, including the one below! Tonight I decided to make it a "Darren week" since he has been the first one in a long time to come at the club (last week) and propose a puzzle. He receives full points (10) for this contribution, because the simple fact of looking for an interesting puzzle means work done! The above position has occured in the game A. Kosten - Chandler, Hastings 1991. Darren challenges you to find the solution for:
Black to play and mate in 5
Total available points for this puzzle is 10. The answers will be published next week together with puzzle #55.

Puzzle #53 solution:
Darren's solution:
This week's puzzle was quite interesting. I tried everything from 1. Qxh3 ... to 1. Ne1 ... At some point I realized that White must keep Black's Queen pinned, to force a move. And then I saw the solution:
[Event "Puzzle #53"][Date "2009.01.09"][Result "1-0"][SetUp "1"][FEN "8/7K/8/5R2/3N2R1/5Q1p/2N3qp/7k w - - 0 1"]1.Qa8!! {White's Queen journeys to the end of the Earth to win the game} 1...Qxa8 (1...Kg1 2.Qa1# {The black Queen is pinned}) 2.Rf1#

Correct solutions:
Darren, Mark, Andy Q, Joshua, John, Wilson, Katerina - 10 points
James, Jeremy, Jacky - 9 points
Andy Y, Karl, Nathaniel - 1 point
Each wrong try gets a 1 point deduction in case of providing the correct solution.

Standings:
Darren, Mark, Andy Q, Joshua, John, Wilson, Katerina - 10 points
James, Jeremy, Jacky - 9 points
Andy Y, Karl, Nathaniel - 1 point