I (black) blundered here by taking that pawn on f3:
White to move and win material
Hint 1: show
Remove the defender of the black bishop on f3
Hint 2: show
Discovered attack against the black queen
Fortunately my opponent (white) didn’t see the solution and tried Rf1:
Black to move and retain some of the material advantage
Hint 1: show
Don’t try to save the queen.
Hint 2: show
Look for a pike.
Solution: show
BxB, white’s best option is to take the black queen, then use the bishop to pike the white queen and white rook. This is one possible line: 22. … Bxg2 23. Rxf6 Be4 24. Qf1 Bxf6 25. Qxf6 Re6 26. Qf2 Bxb1 27. d5 Re5 28. Bxe5 dxe5 29. Qb2 Bf5 30. d6