The Fianchetto System in the Queen Indian’s Defense can be treated with black pieces in many different ways. Apart from the most popular 4… Ba6 (Lines 219-228), and its main alternative 4… Bb7 (Lines 214-218), Black also has an interesting check 4… Bb4+. Covering the check by interposing with Nbd2 transposes to positions covered in other lines: 5. Nbd2 Ba6 leads to Line 222, while 5. Nbd2 Bb7 6. Bg2 transposes to Line 214.
5. Bd2 is consequently the main focus of Line 213, where Black has a few promising possibilities:
5… c5 often leaves Black with doubled b-pawns, though it’s not easy for White to make any concrete use of that fact; the Riumin Variation (5… Be7) keeps the tension on the board, while exchanging the bishops with 5… Bxd2+ typically leads to quiet positions, and the Yates Variation (5… a5) should leave White with a slight advantage after 6. Bg2 Bb7 7. O-O O-O 8. Bf4.
[Diagram: White to Move] Black pieces lack coordination, which his opponent can use to launch a strong attack. How should White proceed?
Click here to see the line in our viewer…