Keres Defense, Transpositional Variation

The Transpositional Variation arises when White meets the check of the Kangaroo Defense, also called the Keres Defense, with 3. Nc3. White does not try to avoid the pin. The knight goes to its natural square, and the game moves toward Nimzo-Indian territory. The name reflects this. After 3...Nf6, the position is a standard Nimzo-Indian Defense, and Black can also steer toward Bogo-Indian structures depending on how White continues.

The most common reply by a clear margin is the immediate 3...Bxc3+. Black hands over the bishop pair at once. In return, White's recapture with the b-pawn leaves doubled c-pawns, and the game turns on whether White can use the bishops and central control before those pawns become targets. The engine rates the position as roughly balanced. Its preferred moves are 3...Nf6, 3...c5 and 3...d5, so it favors keeping the tension over the early capture. The rarer 3...Nc6 puts pressure on d4 but gives White good results in practice. In the online sample White scores better overall, and draws are infrequent.