Archives des E02 - Nbd7 6.Nf3 a6 7.Nc3 - Open, 5.Qa4+ Nbd7 6.Nf3 a6 7.Nc3 [+0.01]

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E02 — Nbd7 6.Nf3 a6 7.Nc3 - Open, 5.Qa4+ Nbd7 6.Nf3 a6 7.Nc3

1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 dxc4 5.Qa4+ Nbd7 6.Nf3 a6 7.Nc3

Eval: [+0.01]

Les coups candidats

7…Rb8 — 53.7% (283 parties)

Ambassadeurs : Andersson, Ulf (18x), Krivonosov, Oleg (8x), Sveshnikov, Evgeny (7x), Petrov, Vladimir (ENG) (3x), Bondarevsky, Igor (3x), Eliskases, Erich (3x), Tal, Mikhail (3x), Nogueiras Santiago, Jesus (3x)

7…Be7 — 34.3% (181 parties)

Ambassadeurs : Andersson, Ulf (7x), Korneev, Oleg (4x), Barcza, Gedeon (3x), Huebner, Robert (3x), Xu, Jun (3x), Agdestein, Simen (2x), Bany, Jerzy (2x), Kishnev, Sergey (2x)

7…c5 — 11.0% (58 parties)

Ambassadeurs : Burmakin, Vladimir (3x), Barkhagen, Jonas (2x), Fine, Reuben (1x), Dake, Arthur William (1x), Hearst, Eliot (1x), Evans, Larry (1x), Zagorovsky, Mikhail Pavlovich (1x), Brglez, Frantisek (1x)

7…Bd6 — 0.8% (4 parties)

Ambassadeurs : Petrov, Vladimir (ENG) (1x), Fine, Reuben (1x), Diez Gonzalez, Pedro Maria (1x), Soto Palomo, Cecilio (1x), Krivonosov, Oleg (1x), Bernotas, Arturs (1x), Berdnyk, Mariia (1x), Romanchuk, Viktor (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	7…Rb8	7…Be7	7…c5	7…Bd6
<1800	4	25%	25%	50%	—
1800-2200	81	49%	35%	15%	1%
2200-2600	332	53%	36%	10%	1%
2600+	33	67%	33%	—	—

Évolution par décennie (% des parties)

Décennie	N parties	7…Rb8	7…Be7	7…c5	7…Bd6
1930s	12	50%	33%	8%	8%
1940s	19	63%	37%	—	—
1950s	8	75%	12%	12%	—
1960s	8	75%	25%	—	—
1970s	11	73%	9%	18%	—
1980s	57	63%	25%	12%	—
1990s	60	48%	37%	15%	—
2000s	123	48%	37%	14%	1%
2010s	152	53%	38%	7%	1%
2020s	77	52%	34%	13%	1%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
7…Rb8	53%	52%	▼ -1.3%
7…Be7	38%	34%	▼ -4.4%
7…c5	7%	13%	▲ +5.8%
7…Bd6	1%	1%	▲ +0.6%

Joueurs célèbres

Champions du monde dans cette position

Tal, Mikhail — 4 parties
Kasparov, Garry — 3 parties
Alekhine, Alexander — 2 parties
Karpov, Anatoly — 2 parties
Euwe, Max — 1 partie
Karpov, Aleksandr — 1 partie
Gukesh D — 1 partie

Parties historiques

7…Rb8 — 53.7% (283 parties)

1938 — Petrov, Vladimir (ENG) vs Alekhine, Alexander — 1-0 — Margate ENG
1938 — Maderna, Carlos vs Alekhine, Alexander — 1/2-1/2 — Montevideo URU
1938 — Petrov, Vladimir (ENG) vs Pirc, Vasja — 0-1 — Lodz POL
1939 — Apscheneek, Fricis vs Petrov, Vladimir S. — 0-1 — Kemeri / Riga
1939 — Petrov, Vladimir (ENG) vs Eliskases, Erich — 1/2-1/2 — Rosario ARG

7…Be7 — 34.3% (181 parties)

1937 — Koshnitsky, Gregory vs Purdy, Cecil J S — 1/2-1/2 — corr Australia
1938 — Reshevsky, Samuel vs Fine, Reuben — 0-1 — Nederland
1938 — Adrianus Dingeman de Groot vs Euwe, Max — 0-1 — Amsterdam NED
1939 — Landau, Salo vs Van den Bosch, Johannes — 1/2-1/2 — Amsterdam_Hilversum
1943 — Barcza, Gedeon vs Szily — 1-0 — Hungarian CC Jubilee

7…c5 — 11.0% (58 parties)

1938 — Fine, Reuben vs Dake, Arthur William — 1-0 — New York, NY USA
1951 — Hearst, Eliot vs Evans, Larry — 1/2-1/2 — Forth Worth
1972 — Zagorovsky, Mikhail Pavlovich vs Brglez, Frantisek — 1/2-1/2 — corr Wch7
1978 — Rasmussen, Lars Garne vs Lombard, Andre — 0-1 — Mitropa Cup
1981 — Rantanen, Veikko vs Kolu, Antti — 0-1 — corr NS/I

7…Bd6 — 0.8% (4 parties)

1937 — Petrov, Vladimir (ENG) vs Fine, Reuben — 1/2-1/2 — Semmering AUT
2009 — Diez Gonzalez, Pedro Maria vs Soto Palomo, Cecilio — 1-0 — ICCF
2012 — Krivonosov, Oleg vs Bernotas, Arturs — 1/2-1/2 — Riga LAT
2021 — Berdnyk, Mariia vs Romanchuk, Viktor — 1-0 — Cherkasy UKR

Catalan: Open, 5.Qa4+ Nbd7 6.Nf3 a6 7.Nc3

Coups: 1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 dxc4 5.Qa4+ Nbd7 6.Nf3 a6 7.Nc3

Partie
Johannesburg 1981 – Round 2 – Andersson, Ulf 1949 – 1/2-1/2 – Huebner, Robert – G12 1. Nf3 d5 2. d4 Nf6 3. c4 dxc4 4. Qa4+ Nbd7 5. g3 a6 6. Nc3 e6 7. Bg2 Be7 8. Ne5 Rb8 9. Nxd7 Qxd7 10. Qxc4 b5

Johannesburg 1981 – Round 2 – Andersson, Ulf 1949 – 1/2-1/2 – Huebner, Robert – G12