A nice trick - Queen's Gambit Declined

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LetItRain

This game lasted 21 moves, I had the white pieces and I thought that this tactic was quite nice although my opponent obviously did not see the threat. Noticing that g7 is weak, I moved my queen to a diagonal, facing g7 and after a rather bad, yet seemingly obvious move from my opponent - putting his rook on the open file and threatening my queen, I was able to execute the tactic, relying on the pin along the g file, following by a checkmate where ever the black king goes.