Starting from 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Nxe4, players enter the Ruy Lopez: Morphy Defense, Tartakower Variation — ECO C80. With 609,939 games on record, the patterns below come from the largest practical sample available.
History and Notable Players
It arises from the Ruy Lopez: Brix Variation. Among the most prolific White practitioners are Vlastimil Jansa (28 games), Nigel D Short (25 games), Michael Adams (23 games). Black-side regulars include Viktor Korchnoi (87 games), Victor Mikhalevski (74 games), Artur Jussupow (59 games).
Performance Across Rating Levels
Popularity and results vary sharply by rating level. Among 1200-rated players, it appears in 0.01% of games — 59,660 of them on record — with White winning 60% and Black 37%. At 1800 the opening surfaces in 0.01% of games; White wins 47.5%, Black 46.6%, draws 5.9%. At 2500, 0.08% of games go into this opening; draws sit at 11.8% — the line is well-mapped at this level. White's edge erodes by 15.9pp from 1200 to 2500 Elo, suggesting Black's counterplay is easier to find with experience.
Time Control Patterns
Time control matters here: rapid players reach for this opening more than others. In bullet, it appears in 0.00% of games (128,340); White wins 49.1%. Blitz shows 0.01% adoption across 461,544 games, White scoring 49.4%. In rapid, the share rises to 0.01% — 148,395 games, White 54%. White's score swings 4.9pp across formats, so time control isn't just a stylistic choice here — it shifts the actual results.
Move Diversity and Theory Depth
Move choice is far from uniform in the Ruy Lopez: Morphy Defense, Tartakower Variation. At 1200 Elo, the top reply is Re1, played 65.1% of the time. There are 3 other moves seeing meaningful share, and 93.3% of games stick to established theory. Entropy: 1.56. By 2500, d4 dominates at 84.5% of replies; only 2 viable alternatives remain and 99.6% of moves are theory. Entropy drops to 0.70. That entropy collapse is the signature of a line where preparation pays off: at the top, players know the best move and play it.
Historical Trends
Year-over-year data tells you whether this opening is a contemporary fixture or a fading one. Adoption peaked in 2015 at 0.02% (4,104 games). By 2025 it sits at 0.01% — a 27% shift overall, leaving the line in decline.
Main Lines and Variations
After 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Nxe4, the established follow-ups are:
Each branch leads to a different middlegame character — the resulting pawn structure decides what kind of game you get.
Common Mistakes
- Drifting away from main theory — At 400 Elo, theory adherence sits at 86.1% — versus 97.8% at 2000. The most popular deviation is d3 (played 11% of the time at 400, much less so up top). It looks fine but quietly hands the better-prepared side an edge.
- Neglecting development — It can feel productive to make extra pawn moves early, but falling behind in piece development is what loses most amateur games — especially in open positions where active pieces find squares fast.
- Playing without a plan — Each Ruy Lopez: Morphy Defense, Tartakower Variation middlegame demands a specific approach. Decide whether the position calls for attack, manoeuvre, or simplification before reaching for a move.
Practice on Chessiverse
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