Petroff Defence: PDF booklet and PGN file added to secret openings booklet list -- comments invited, may get updated soon.
Chess Tips
| MIDDLEGAME TIPS: |
* Very often the first priority in the early middle game in closed positions is to see where you can open a file. (Like in the French defence: after 1. e4 e6 2. d4 d5 3. e5 Black should immediately see about opening up space on the Queen's-side with 3...c5.) |