D78b - 7.Na3 (1955)

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D78b —
1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.Nf3 O-O 6.O-O c6 7.Na3
Les coups candidats
7…Bf5 — 40.8% (62 parties)
Ambassadeurs : Nikolic, Predrag (4x), Malich, Burkhard, Dr. (3x), Flesch, János (2x), Alterman, Boris (2x), Nogueiras Santiago, Jesus (2x), Farago, Sandor (2x), Hickl, Joerg (2x), Boysan, M (1x)
7…Nbd7 — 14.5% (22 parties)
Ambassadeurs : Johannessen, Svein (1x), Wotulo, Max (1x), Spassky, Boris Vasily (1x), Hoen, Ragnar Harald (1x), Sorri, Kari Juhani (1x), Erozbek, Akdogan (1x), Kristiansen, Elias V. (1x), Schmidt, Waldemar (1x)
7…Qb6 — 7.9% (12 parties)
Ambassadeurs : Nikolic, Predrag (2x), Nevednichy, Boris M (1x), Baar, Reinhard, Dr. (1x), Szilagyi, Gyorgy Laszlo (1x), Schmidt, Wlodzimierz (1x), Popovic, Petar (1x), Matlak, Marcin (1x), Schmidt, Waldemar (1x)
7…Ne4 — 7.2% (11 parties)
Ambassadeurs : Botvinnik, Mikhail (1x), Donner, Jan-Hein (1x), Sapre, Ramchandra (1x), De Lange, Daan (1x), Spassky, Boris Vasily (1x), Krogius, Nikolai V (1x), Fyllingen, Roy Harald (1x), Orseth, Dag (1x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 7…Bf5 7…Nbd7 7…Qb6 7…Ne4
<1800 4 — 50% — —
1800-2200 42 31% 14% 5% 7%
2200-2600 77 48% 13% 12% 6%
2600+ 1 100% — — —
Évolution par décennie (% des parties)
Décennie N parties 7…Bf5 7…Nbd7 7…Qb6 7…Ne4
1950s 3 — — — —
1960s 16 19% 12% 12% 19%
1970s 8 50% 38% — —
1980s 8 62% 12% — —
1990s 34 53% 12% 6% 3%
2000s 19 21% 32% 5% 11%
2010s 51 45% 10% 4% 10%
2020s 13 38% 8% 38% —
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
7…Bf5 45% 38% ▼ -6.6%
7…Nbd7 10% 8% ▼ -2.1%
7…Qb6 4% 38% ▲ +34.5%
7…Ne4 10% 0% ▼ -9.8%
Joueurs célèbres
Champions du monde dans cette position
Botvinnik, Mikhail — 1 partie
Parties historiques
7…Bf5 — 40.8% (62 parties)
1964 — Flesch, János vs Dely, Peter — 1/2-1/2 — Pecs
1968 — Boysan, M vs Engel, Harald — 0-1 — cr
1969 — Beliavsky, Alexander G vs Lainburg, Viktor — 1/2-1/2 — ?
1971 — Doda, Zbigniew vs Flesch, János — 1/2-1/2 — Novy Smokovec SVK
1972 — Baumbach, Friedrich, Dr. vs Malich, Burkhard, Dr. — 1/2-1/2 — Goerlitz
7…Nbd7 — 14.5% (22 parties)
1960 — Johannessen, Svein vs Wotulo, Max — 1-0 — Leipzig GER
1962 — Spassky, Boris Vasily vs Hoen, Ragnar Harald — 1-0 — Varna BUL
1972 — Sorri, Kari Juhani vs Erozbek, Akdogan — 1-0 — Skopje ol (Men) fin-C
1972 — Kristiansen, Elias V. vs Schmidt, Waldemar — 1/2-1/2 — Skopje olm
1972 — Daglas, Gerasimos vs Georgiou, Iraklis — 0-1 — Athens GRE
7…Qb6 — 7.9% (12 parties)
1967 — Nevednichy, Boris M vs Baar, Reinhard, Dr. — 1-0 — Soviet Union
1969 — Szilagyi, Gyorgy Laszlo vs Schmidt, Wlodzimierz — 0-1 — Polanica Zdroj POL
1991 — Nikolic, Predrag vs Popovic, Petar — 1/2-1/2 — Pula CRO
1992 — Matlak, Marcin vs Schmidt, Waldemar — 1/2-1/2 — Czestochowa
2001 — Hallengren, Boris vs Neven, Knut — 0-1 — IECG
7…Ne4 — 7.2% (11 parties)
1960 — Botvinnik, Mikhail vs Donner, Jan-Hein — 1/2-1/2 — Leipzig olm
1960 — Sapre, Ramchandra vs De Lange, Daan — 0-1 — Leipzig GER
1963 — Spassky, Boris Vasily vs Krogius, Nikolai V — 1/2-1/2 — Moscow RUS
1999 — Fyllingen, Roy Harald vs Orseth, Dag — 1-0 — ?
2001 — Giry, Jean-marc vs Bourguet, Georges — 1/2-1/2 — France