Vienna Game: Stanley Variation, Reversed Spanish – Playing the Nd5 Line as Black

This line of the Vienna Game is all about trading down into a comfortable middlegame. After 4...Nxd5, you've already removed a dangerous knight that was eyeing f6 and d5. What you really want is to force White into a decision on b4: if White recaptures with the bishop on d5 — which is the engine's best move — you can chase it immediately with 5...c6, gaining time and space in the centre. Notice that you've already developed your king's knight and your dark-squared bishop, while White's light-squared bishop is now a target. Your fundamental idea is simple: finish development, secure your centre with ...d5, and enjoy the open lines that appear once White's bishop retreats. The position is balanced, but you'll have the easier plan to follow.

The move White should play according to the engine is 5.Bxd5, continuing with 5...c6 6.Bb3 d5. This sequence has been played over 67,000 times in the database, making it by far the most common continuation. After 6...d5 you break open the centre on your terms. You'll have a pawn on d5, your queen's bishop can develop naturally to e6 or f5, and your knight can come to d7 or a6. White's bishop on b3 is decent but not threatening. The resulting structure is healthy for you — you're not cramped, you have good piece play, and if White ever castles kingside you'll have active options on the kingside or in the centre. The 5.exd5 recapture is also possible (about 17,000 games), but that gives you a different structure where you can develop quickly and often target the e4-pawn. Both are fine; just know that 5.Bxd5 is what the engine prefers and what club players will play most often.

The database identifies three common errors White can make here, and knowing them lets you punish mistakes immediately. The most frequent inaccuracy is 5.Qh5, played in 157 games. It loses about 0.6 pawns compared to 5.Bxd5. Your reply is simple: develop a piece with gain of time, such as ...Nc6 or ...d6, and White's queen will soon feel awkward. Worse for White are 5.Qf3 and 5.c3, both classified as blunders — they lose roughly 4.2 and 3.6 pawns respectively. Against 5.Qf3, you can chase the queen with ...Nc6 or simply play ...d5, hitting the bishop on c4 and opening lines. Against 5.c3, the natural 5...Nc6 or 5...d6 gives you a massive advantage. If White plays one of these mistakes, trust your instincts: develop, attack the queen or the bishop, and you'll quickly be winning. These positions don't require memorisation — just good chess.

The numbers paint a clear picture: this opening is a practical draw with chances for both sides, but it slightly favows the more accurate player. White wins 49.3% of games, Black wins 46.7%, and draws are rare at just 3.9%. That low draw rate is important — it tells you the position is sharp enough that someone usually blunders. Since White is the one navigating a decision on move 5, the pressure is on them to pick the right recapture. If they pick 5.Bxd5, White scores 49.7% — essentially a coin flip. If they pick 5.exd5, White scores only 48.0%, which means you're actually outscoring White from that line. And if they blunder with 5.Qh5, 5.Qf3, or 5.c3, your winning chances skyrocket. The key takeaway: play solidly, don't force anything, and wait for White's mistake. In human play that mistake comes often.