Puzzle of the week #269

Submitted by eugen on

Absolute pin

Level
3-Bishop
Chess Diagram
[Event "Puzzle #269"][Date "2015.02.02"][Result "1-0"][SetUp "1"][FEN "r2r4/1b3pk1/5qp1/pP1p3p/2pN3P/3nP1P1/PQR2PB1/3R2K1 w - - 0 1"]
This week's middle game position looks complicated enough to make you scratch your head for a while. White moves first and needs your help to come up with a clever play. Do not dispair though! Simply apply our analysis method step by step, see if you can find any surprise tricks and answer to the following:
a) Who stands better and why (explain)?
b) What surprise trick can you use?
c) Write the winning combination you were able to find

Total available points for this puzzle is 20. The answers will be published next time together with puzzle #270.

Puzzle #268 solution:
Game Brodsky - Tregubov, Wijk aan Zee 1995. Two solvers had the correct answer and I chose one of them (the first one received) by Aaron:
"a) It is an Absolute Pin
[Event "Puzzle #268"][Date "2015.01.27"][Result "0-1"][SetUp "1"][FEN "rq3rk1/pb1p1ppp/1p2p3/2b1n3/2P1P3/2NB2P1/PP1Q1PP1/RN3RK1 b - - 0 1"]1...Nf3+ 2.gxf3 Qxg3+ 3.Kh1 Qh3+ 4.Kg1 Bd6 5.f4 Qg4+ 6.Kh1 Bxf4 7.f3 Qh4+ 8.Kg1 Bxd2

Correct solutions:
Benjamin, Aaron - 20 points
Coco, Jalen, Hyson, Yakov - 17 points
Bradley - 15 points
Deryk - 10 points
Terry, Cody - 5 points
Dheera - 2 points

STANDINGS:
Benjamin - 45 points
Coco - 42 points
Bradley - 40 points
Deryk - 35 points
Cody, Terry - 30 points
Aaron - 20 points
Jalen, Hyson, Yakov - 17 points
Dheera - 2 points