I almost lost this one

• Note how weak I am on the left side
• Had I not mated on this move ...
• Black would have advanced ranks in columns A, B, C, & D
• Black was up by 4 Pawns (6 to 2)
• His next move would have been F3 to F2 (check)
• My defense would have been to block with the Rook (G7 to G2)
• Then Rook to Rook exchange