Semi-Slav Defense:Anti-Moscow Gambit

It is reached after 11 moves: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 h6 6. Bh4. It is a line of the Semi-Slav Defense.

Black is to move and has 34 legal moves. Over the next four moves — two for each side — the game can branch into 1,364,204 different games. Those games reach 433,756 different positions: most positions can be reached in more than one way, 3.1 on average.

No later position on this line has a name of its own in the Lichess opening list: the names end here.

The same moves can be played in 7,200 different legal orders that all reach this position. For example 1. d4 d5 2. Nf3 c6 3. c4 Nf6 4. Nc3 e6 5. Bg5 h6 6. Bh4, which starts as the Queen's Pawn Game: Zukertort Variation.