I believe I see it. Not too hard if you take the time and examine the position. Basically, it's a double threat.
Hintless Puzzle #6

Spoiler Alert ! solution will be given down below.
Hugh Alexander vs Vincenzo Castaldi, Hilversum 1947
Alexander, the best British player of his time, was a true amateur who competed in time off from codebreaking German and Russian ciphers. The Foreign Office would not allow him to lend the England team at Moscow 1956 Olympiad nor even in 1952 at Helsinki, which the mandarins thought too near the Soviet border.
Alexander specialised in gaint-killing, beat two world champions, and played in an imaginative, unorthodox stle. His primer Learn Chess, written 45 years ago, is still one of the best book for the novices.
Today's puzzle is from a world title eliminator where Alexander (White, to move) has bishop and knight against rook and pawn, which looks about equal. Some would preferBlack's threat of Bc6 and Qh1 mate, but Alexander saw deeper. Can you find White's two-move winning seqence ?
Solution: 1.Qc2 !(threat 2.Qxg6 mate) Rg8 2.Bg2 traps Black's Queen.
This was written by Leonard Barden in which appear in the Western Australia's 'Sunday Times'
Phew, that wasn't too easy, but also not too hard. I got it without before scrolling down to the solution though!
Spoiler Alert ! solution will be given down below.
Hugh Alexander vs Vincenzo Castaldi, Hilversum 1947
Alexander, the best British player of his time, was a true amateur who competed in time off from codebreaking German and Russian ciphers. The Foreign Office would not allow him to lend the England team at Moscow 1956 Olympiad nor even in 1952 at Helsinki, which the mandarins thought too near the Soviet border.
Alexander specialised in gaint-killing, beat two world champions, and played in an imaginative, unorthodox stle. His primer Learn Chess, written 45 years ago, is still one of the best book for the novices.
Today's puzzle is from a world title eliminator where Alexander (White, to move) has bishop and knight against rook and pawn, which looks about equal. Some would preferBlack's threat of Bc6 and Qh1 mate, but Alexander saw deeper. Can you find White's two-move winning seqence ?
Solution: 1.Qc2 !(threat 2.Qxg6 mate) Rg8 2.Bg2 traps Black's Queen.
This was written by Leonard Barden in which appear in the Western Australia's 'Sunday Times'
Why is 1.Qc2 needed? Why not 1.Bg2 directly. That traps the black queen as well.
Hintless Puzzle #5 Hintless Puzzle #7