Structure de pions
♔ Blancs ♚ Noirs
Pions doublés
Pions isolés
Arriérés
Chaînes ● f2→g3, h2→g3 ● d6→e5, b7→c6
Passés
Majorité
Cases
♔ Blancs ♚ Noirs
Cases fortes ● g4 (2v0)
Cases faibles
Centre
Colonnes et diagonales
♔ Blancs ♚ Noirs
Pièces
♔ Blancs ♚ Noirs
Bc1 ● Bc1 Non développé (mob. 0)
Bg2 ● Bg2 Ok (mob. 2)
Bc8 ● Bc8 Non développé (mob. 5)
Bf8 ● Bf8 Non développé (mob. 1)
Paire de fous ● Oui ● Oui
Non développées 3 (● c1, ● a1, ● h1) 5 (● b8, ● c8, ● f8, ● a8, ● h8)
Sécurité du roi
♔ Blancs ♚ Noirs
Statut ● Au centre ● Au centre
Droits de roque O-O / O-O-O O-O / O-O-O
Thèmes
♔ Blancs ♚ Noirs
Phase Ouverture
Centre mobile
Ruptures ● c4-c5, ● d2-d4 ● …d6-d5

A23g — English: Bremen, Keres, 4.Nf3 d6

1.c4 e5 2.Nc3 Nf6 3.g3 c6 4.Nf3 d6 5.Bg2 *   ● Trait aux Noirs

Ouverture — Centre mobile

♔ Point de vue Blancs

8 7 6 5 4 3 2 1
bR
bN
bB
bQ
bK
bB
bR
bP
bP
bP
bP
bP
bP
bP
bN
bP
wP
wN
wN
wP
wP
wP
wP
wP
wP
wB
wP
wR
wB
wQ
wK
wR
abcdefgh
Plans. O-O (Mettre le roi en sécurité, connecter les tours — 71 % des parties) ; d3 (Solidifier le centre — 12 % des parties) ; d4 (Occuper le centre — 10 % des parties).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8
wR
wK
wQ
wB
wR
wP
wB
wP
wP
wP
wP
wP
wP
wN
wN
Case forte (2v0)
wP
bP
bN
bP
bP
bP
bP
bP
bP
bP
bR
bB
bK
bQ
bBFou actif — mobilité 5
bN
bR
hgfedcba
Plans. ...Be7 (Développer f8 — 58 % des parties) ; ...Nbd7 (Développer b8 — 18 % des parties) ; ...g6 (Préparer le fianchetto — 10 % des parties) ; ...Be6 (Fou actif (mobilité 7), Développer c8 — 8 % des parties).
Avantages
Faiblesses
Diagonale active
Plans
Partie
1955 USSR – Round 1 – Averbakh, Yuri L – 1-0 – Ragozin, Viacheslav – G2
1. c4 e5 2. Nc3 Nf6 3. g3 c6 4. Nf3 d6 5. Bg2 Be7 6. O-O O-O 7. d4 e4 8. Nd2 d5 9. f3 exf3 10. Bxf3 Bh3
1956 Mar del Plata – Round 7 – Bolbochan, J. – 1-0 – Wexler, Eithan – G40
1. c4 e5 2. Nc3 d6 3. g3 Nf6 4. Bg2 c6 5. Nf3 g6 6. O-O Bg7 7. h3 O-O 8. Rb1 a5 9. e4 Nbd7 10. d4 a4
1957 Danmarksmesterskabet – Round 2 – Andersen, Borge – 1/2-1/2 – Norman Hansen, Holger – G5
1. c4 Nf6 2. Nc3 e5 3. g3 d6 4. Bg2 c6 5. Nf3 Be7 6. O-O O-O 7. d3 Nbd7 8. Rb1 Re8 9. b4 Qc7 10. b5 Bf8
1960 New York ch-USA – Round 3 – Saidy, Anthony – 1-0 – Benko, Pal – G10
1. c4 Nf6 2. Nc3 e5 3. g3 c6 4. Nf3 d6 5. Bg2 Be7 6. O-O O-O 7. e4 Bg4 8. h3 Bxf3 9. Bxf3 Ne8 10. Bg2 Bf6
1962 Varna ol (Men) qual-D – Round 1 – Vivek Kumar, Shukla – 0-1 – Lengyel, Levente – G1
1. c4 Nf6 2. Nc3 e5 3. Nf3 d6 4. g3 c6 5. Bg2 Be7 6. O-O O-O 7. d4 e4 8. Ne1 d5 9. f3 exf3 10. Nxf3 dxc4
1963 Zenica ch YUG – Round 4 – Masic, Ljubomir – 0-1 – Janosevic, Dragoljub – G19
1. Nf3 Nf6 2. g3 d6 3. Bg2 e5 4. c4 c6 5. Nc3 g6 6. d4 Nbd7 7. O-O Bg7 8. b3 O-O 9. dxe5 dxe5 10. Ba3 Re8
1967 Capablanca Memorial – Round 6 – Pachman, Ludek – 1/2-1/2 – Rossetto, Hector – G49
1. c4 e5 2. Nc3 Nf6 3. g3 c6 4. Nf3 d6 5. Bg2 Bg4 6. d4 Nbd7 7. O-O Be7 8. h3 Bxf3 9. Bxf3 O-O 10. e4 Qb6
1967 URS Team Ch – Round 1 – Botvinnik, Mikhail – 1/2-1/2 – Boleslavsky, Isaac – G5
1. c4 Nf6 2. Nc3 e5 3. g3 c6 4. Nf3 d6 5. Bg2 g6 6. O-O Bg7 7. d3 Nbd7 8. Bd2 O-O 9. Qc1 Re8 10. Ng5 Nf8
1968 Lugano ol (Men) qual-D – Round 1 – Lengyel, Laszlo – 1/2-1/2 – Van der Laat, J. – G2
1. c4 e5 2. Nc3 Nf6 3. g3 c6 4. Nf3 d6 5. Bg2 Be7 6. O-O Be6 7. b3 Qd7 8. Re1 Na6 9. Bb2 Bh3 10. Bh1 Ng4
1969 Mar del Plata zt – Round 1 – Najdorf, Miguel – 1-0 – Bronstein, Luis Marcos – G3
1. c4 e5 2. Nc3 Nf6 3. g3 c6 4. Nf3 d6 5. Bg2 g6 6. O-O Bg7 7. d3 O-O 8. Rb1 Re8 9. e4 Na6 10. h3 Nc7
1969 Tbilisi – Round 1 – Spiridonov, Nikola – 0-1 – Dzindzichashvili, Roman – G1
1. c4 e5 2. Nc3 Nf6 3. g3 c6 4. Nf3 d6 5. Bg2 Be6 6. b3 Nbd7 7. O-O h6 8. d4 e4 9. d5 exf3 10. dxe6 fxg2
1970 Palma de Mallorca Interzonal – Round 21 – Naranja, Renato – 1/2-1/2 – Polugaevsky, Lev – G15
1. c4 e5 2. Nc3 Nf6 3. g3 c6 4. Nf3 d6 5. Bg2 Nbd7 6. O-O g6 7. d4 Bg7 8. dxe5 dxe5 9. Qd6 Bf8 10. Qd3 Qe7
Tallinn 1973 – Round 1 – Saidy, Anthony – 0-1 – Keres, Paul – G4
1. c4 Nf6 2. Nc3 e5 3. Nf3 d6 4. g3 c6 5. Bg2 Be7 6. O-O O-O 7. Qc2 Bg4 8. h3 Bh5 9. d3 Nbd7 10. e4 Ne8
World Blitz 2023 – Round 11.20 – Shimanov, Aleksandr – 1-0 – Rakhmanov, Aleksandr – G632
1. Nf3 Nf6 2. c4 d6 3. Nc3 e5 4. g3 c6 5. Bg2 Be7 6. O-O O-O 7. d3 a5 8. a3 h6 9. Rb1 Bf5 10. b4 axb4

A23g — Bremen, Keres (1955)
1.c4 e5 2.Nc3 Nf6 3.g3 c6 4.Nf3 d6 5.Bg2
Les coups candidats
5…Be7 — 59.5% (475 parties)
Ambassadeurs : Lengyel, Levente (3x), Tu, Hoang Thai (3x), Freisler, Pavel (3x), Conrad, Norman (2x), Tal, Mikhail (2x), Saidy, Anthony (2x), Gomez Fontal, Felix Manuel (2x), Zhuravlev, Nikolay. (2x)
5…Nbd7 — 14.3% (114 parties)
Ambassadeurs : Torre, Eugenio (4x), Spassky, Boris V. (2x), Haskamp, Stephan (2x), Petersen, Lars (2x), Mortensen, Erling (2x), Papadopoulos, Panayotis31588 (2x), Stekel Grunberg, Moises (1x), Ader Hausman, Walter (1x)
5…Be6 — 10.8% (86 parties)
Ambassadeurs : Spiridonov, Nikola (3x), Despotovic, Momcilo (2x), Bleul, Peter (2x), Timman, Jan H (1x), Schlinkert, Karl (1x), Dzindzichashvili, Roman (1x), Buch, Carsten (1x), Nielsen, Flemming (1x)
5…g6 — 6.8% (54 parties)
Ambassadeurs : Botvinnik, Mikhail (2x), Bosboom, Manuel (2x), Anay Barche (1x), Donner, Jan-Hein (1x), Silva, Carlos (1x), Rocha, Antonio (1x), Bolbochan, Julio (1x), Wexler, Bernardo (1x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 5…Be7 5…Nbd7 5…Be6 5…g6
<1800 61 62% 8% 20% 3%
1800-2200 282 64% 9% 12% 7%
2200-2600 264 61% 24% 6% 4%
2600+ 5 60% 40%
Évolution par décennie (% des parties)
Décennie N parties 5…Be7 5…Nbd7 5…Be6 5…g6
1950s 6 67% 33%
1960s 33 36% 24% 6% 24%
1970s 27 56% 41% 4%
1980s 62 52% 21% 6% 13%
1990s 191 63% 13% 10% 7%
2000s 191 61% 10% 14% 6%
2010s 214 60% 15% 11% 4%
2020s 74 64% 9% 15% 3%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
5…Be7 60% 64% ▲ +3.7%
5…Nbd7 15% 9% ▼ -5.5%
5…Be6 11% 15% ▲ +3.6%
5…g6 4% 3% ▼ -1.0%
Joueurs célèbres
Champions du monde dans cette position
Tal, Mikhail — 2 parties
Botvinnik, Mikhail — 2 parties
Parties historiques
5…Be7 — 59.5% (475 parties)
1955 — Averbakh, Yuri L vs Ragozin, Viacheslav — 1-0 — USSR
1957 — Sandor, Bela vs Filip, Marius Liviu — 1/2-1/2 — Bratislava SVK
1957 — Andersen, Borge vs Conrad, Norman — 1/2-1/2 — Odense DEN
1959 — Lengyel, Levente vs Hevizi, Laszlo Dr — 1-0 — HUN-ch Budapest HUN
1960 — Saidy, Anthony vs Benko, Pal — 1-0 — New York ch-USA
5…Nbd7 — 14.3% (114 parties)
1960 — Reshko, Aron vs Spassky, Boris V. — 0-1 — Rostov RUS
1961 — Stekel Grunberg, Moises vs Ader Hausman, Walter — 0-1 — Santiago de Chile
1961 — Hort, Vlastimil vs Maalouf, Carlos — 1-0 — The Hague NED
1961 — Ilivitsky, Georgy A vs Sergievsky, Vladimir D — 1-0 — Russia
1961 — Khasin, Abram vs Spassky, Boris V. — 1/2-1/2 — Moscow RUS
5…Be6 — 10.8% (86 parties)
1968 — Timman, Jan H vs Schlinkert, Karl — 1-0 — Biel open
1969 — Spiridonov, Nikola vs Dzindzichashvili, Roman — 0-1 — Tbilisi GEO
1982 — Velikov, Petar vs Rajkovic, Dalibor — 1-0 — Vrnjacka Banja SRB
1985 — Buch, Carsten vs Nielsen, Flemming — 1-0 — Aarhus DEN
1988 — Spiridonov, Nikola vs Despotovic, Momcilo — 1-0 — Belgrade open
5…g6 — 6.8% (54 parties)
1956 — Bolbochan, Julio vs Wexler, Bernardo — 1-0 — Mar del Plata ARG
1958 — Botvinnik, Mikhail vs Smyslov, Vasily — 1/2-1/2 — Moskou wch-m
1960 — Krogius, Nikolai V vs Luik, Helmuth — 1-0 — Moscow RUS
1961 — Anay Barche vs Donner, Jan-Hein — 0-1 — Maroczy mem Budapest HUN
1961 — Suetin, Alexey S vs Rosenfeld, Isai K — 1-0 — Novgorod RUS

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