The Meran Variation, Wade Variation, Kaidanov Gambit is a variation of the Semi-Slav Defense, catalogued as ECO D47. The line runs 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 Bb7 9. e4 b4 10. Na4 c5 11. e5 Nd5 12. O-O cxd4 13. Nxd4, reaching the position shown below after 25 half-moves.
White holds the centre with pawns on e5. Development is level at three minor pieces each. It is Black to move after 13 moves. White has castled while Black’s king is still uncommitted; the c- and d-files files are fully open.
On the Semi-Slav Defense generally: A complex defense combining ideas from the Slav and Queen's Gambit Declined.
You can play through this variation move by move in your browser — Learn mode walks the line with an explanation at each step, and Drill mode replays it from memory so you find out whether you actually know it. No account is required.
See all 63 Semi-Slav Defense variations →
The Meran Variation, Wade Variation, Kaidanov Gambit goes 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 Bb7 9. e4 b4 10. Na4 c5 11. e5 Nd5 12. O-O cxd4 13. Nxd4. It is a variation of the Semi-Slav Defense and is catalogued as ECO D47.
The Meran Variation, Wade Variation, Kaidanov Gambit is ECO D47. ECO codes group openings by their move order, so nearby codes cover closely related lines of the Semi-Slav Defense.
Stockfish evaluates the position after 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 Bb7 9. e4 b4 10. Na4 c5 11. e5 Nd5 12. O-O cxd4 13. Nxd4 at +0.34 at depth 18, which is a slight pull for White, within normal opening margins. Engine evaluation is only a starting point — at club level the practical value of a line is mostly about whether you know its plans better than your opponent does.
White holds the centre with pawns on e5. Development is level at three minor pieces each. It is Black to move. White has castled while Black’s king is still uncommitted; the c- and d-files files are fully open.