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A25h — Closed (1938)
1.c4 e5 2.Nc3 Nc6 3.g3 f5 4.Bg2
Les coups candidats
Ambassadeurs : Kurajica, Bojan (19x), Moody, David W (10x), Lyell, Mark (10x), Spraggett, Kevin (9x), Sher, Miron (8x), Vaulin, Alexander P. (8x), Gdanski, Jacek (8x), Mitkov, Nikola (7x)
4…g6 — 1.4% (72 parties)
Ambassadeurs : Svidler, Peter (3x), Monteverde, Italo (2x), Tarleva, Diana (2x), Filep, Tibor (1x), Osnos, Viatcheslav (1x), Pelts, Roman (1x), Katalymov, Boris (1x), Voss, Guenther (1x)
4…Bb4 — 1.2% (59 parties)
Ambassadeurs : Salmensuu, Olli (3x), Sturua, Zurab (1x), Nevednichy, Vladislav (1x), Schmidt, Reiner (1x), Keatinge-Clay, Adrian (1x), Ilic, Slobodan R (1x), Nestorovic, Dejan (1x), Zueger, Beat (1x)
4…Bc5 — 0.7% (33 parties)
Ambassadeurs : Spiegelberg, Olaf (2x), Schoetzig, Andreas, Dr. (2x), Sorensen, Soren A. (1x), Nielsen, Hartvig (1x), Erdeljan, Miroslav (1x), Furrer, Marc (1x), Stoll, Ferdinand (1x), Zimmer, Frank (1x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 4…Nf6 4…g6 4…Bb4 4…Bc5
<1800 330 91% 3% 3% 2%
1800-2200 2406 96% 2% 1% 1%
2200-2600 1678 97% 1% 1% 0%
2600+ 34 97% 3%
Évolution par décennie (% des parties)
Décennie N parties 4…Nf6 4…g6 4…Bb4 4…Bc5
1950s 28 96%
1960s 58 95% 3%
1970s 89 97% 1% 1% 1%
1980s 200 97% 2% 0%
1990s 744 95% 2% 1% 1%
2000s 1395 95% 1% 2% 1%
2010s 1938 96% 1% 1% 1%
2020s 519 97% 1% 1% 1%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
4…Nf6 96% 97% ▲ +1.0%
4…g6 1% 1% -0.3%
4…Bb4 1% 1% ▼ -0.7%
4…Bc5 1% 1% +0.1%
Joueurs célèbres
Champions du monde dans cette position
Karpov, Anatoly — 4 parties
Gukesh D — 4 parties
Botvinnik, Mikhail — 2 parties
Fischer, Robert James — 1 partie
Tal, Mikhail — 1 partie
Kasparov, Garry — 1 partie
Anand, Viswanathan — 1 partie
Kramnik, Vladimir — 1 partie
Carlsen, Magnus — 1 partie
Parties historiques
4…Nf6 — 95.9% (4768 parties)
1950 — Golombek, Harry vs Steiner, Herman — 1/2-1/2 — Venice ITA
1950 — Pirc, Vasja vs Tartakower, Savielly — 0-1 — Amsterdam NED
1951 — Novotelnov, Nikolai vs Aronin, Lev — 0-1 — Moscow RUS
1952 — Evans, Larry vs Steiner, Herman — 1-0 — USA
1952 — Botvinnik, Mikhail vs Simagin, Vladimir — 1/2-1/2 — Moscow RUS
4…g6 — 1.4% (72 parties)
1962 — Pelts, Roman vs Katalymov, Boris — 0-1 — Minsk BLR
1969 — Filep, Tibor vs Osnos, Viatcheslav — 0-1 — Debrecen HUN
1979 — Pomar Salamanca, Arturo vs Gonzalez Mestres, Luis — 1/2-1/2 — Barcelona ESP
1985 — Gibson, John F. vs Hawkes, John E. — 1-0 — NATT2-06 corr
1987 — Gibson Madzinga vs Hawkes, Catherine — 1-0 — corr North Atlantic tt
4…Bb4 — 1.2% (59 parties)
1979 — Sturua, Zurab vs Nevednichy, Vladislav — 1-0 — USSR
1991 — Zueger, Beat vs Kamber, Bruno — 1-0 — Ticino op
1995 — Schmidt, Reiner vs Keatinge-Clay, Adrian — 1-0 — ?
1995 — Ilic, Slobodan R vs Nestorovic, Dejan — 1/2-1/2 — Nis SRB
1997 — Braga, Cicero Nogueira vs Gerbelli Neto, Eduardo — 1/2-1/2 — Santos ch Paulista
4…Bc5 — 0.7% (33 parties)
1974 — Sorensen, Soren A. vs Nielsen, Hartvig — 1-0 — Vejle DEN
1981 — Erdeljan, Miroslav vs Furrer, Marc — 1-0 — corr YUG
1991 — Jean, Olivier vs Barrielle, Philippe — 1-0 — Provence
1995 — Spiegelberg, Olaf vs Schoetzig, Andreas, Dr. — 0-1 — GER
1995 — Moylan, Andrew vs Young, Joel — 0-1 — Canberra AUS