i misspoke. g1 or f1 or h1 is correct. i should have typed f1 as i would expect that to be the choice of black, unless the queen moves to intercept which only seems to delay the inevitable by 1 move.
Maybe I should get my chessboard out! Been decades since I played. Thanks for the exercise!
I have had a long break from playing too, and have to tell you it feels great to play again! I'm glad you enjoyed the exercise :)