This is a collection of nearly 400 chess puzzles. They have been collected from games played with the ECO classifications D30-D39 which include the Ragozin and Vienna Variations, the Tarrasch and Exchange 6.Qc2 Variations of the Queen's Gambit Declined. If you frequently play these openings you will find a wealth of tactical tools in this book that are nearly endemic to your opening. Put yourself in the shoes of masters and find the winning moves. Solutions are found at the end of the book. The diagram's disk color indicates who moves first from the bottom of the board.