Chess eDVDs (Download)
The Stonewall defense or attack is a variation of the Queen’s Pawn Game, and is generally characterized by White playing his pawns to d4 & e3, playing Bd3, Nd2, and then playing Pawns to c3 and then f4; although the moves are not always played in that order. The Stonewall is a system White heads for a very specific Pawn formation, rather than try to memorize long lines of different variations.
E-DVD Studies in: The Stonewall - 2 DVDs - Chess Lecture - Volume 143
By GM Leonid Kritz
Hosted by GM Leonid Kritz. The a6 Slav occurs after 4...a6. Black seeks an early b5, either before or after capturing at c4. Chebanenko Slav Defense aka Chameleon is a current and very popular strategy between players who want a flexible position against 1.d4, or want to disorient White.
E-DVD Slav Defense with 4... a6 - Chess Lecture - Volume 39
Hosted by GM Leonid Kritz
GM Kritz outlines several variations of the Queens’s Indian including The Main line and the Main Modern Line. Including 4.g3. Plan 4....Ba6.5.b3 b5 The Queen's Indian is regarded as the sister opening of the Nimzo-Indian, since both openings aim to impede White's efforts to gain full control of the center by playing e2–e4.
E-DVD Queen's Indian - Theory and Practice - 4.g3, Plan 4.. Ba6, 5. b3 b5 - Chess Lecture - Volume 125
by GM Leonid Kritz
GM Kritz outlines several variations of the King’s Indian including The Mar del Plata variation of the King's Indian 9. Nd2. No longer as popular as it once was, it is still played rather frequently even at the top levels of chess.
E-DVD King's Indian Main Line 9.Nd2, 9.Ne1, 9.b4 - Chess Lecture - Volume 84