Don't know exactly why, but this puzzle took me almost three minutes to solve.
Usually its less than a minute for this type and level in CTB, but I became fixated on NxB as part of the solution, and kept trying to make it work.
Once I moved away from that thought, the answer was very quick.
Possibly this was because I had spent the previous 30 minutes on Knight mates and tactics.
Two lessons learned.
|White to move and Gain a Rook|