E55e — Nimzo-Indian: Main Line, Bronstein, 9.Qe2 a6

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 c5 7.O-O dxc4 8.Bxc4 Nbd7 9.Qe2 a6 * ○ Trait aux Blancs

Ouverture — Centre mobile

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Plan principal. Jeu sur l'aile dame (a3 dans 44 % des parties).

Atouts. Les Blancs s'appuient sur un contrôle dominant de e5, un fou actif en c4 et la colonne semi-ouverte c.

Côté adverse. Un mauvais fou en c8.

En contrepartie. Plusieurs pièces dorment encore (le fou c1 et la tour a1).

Plans. a3 (Préparer expansion aile dame — 44 % des parties) ; a4 (38 % des parties) ; Rd1 (9 % des parties) ; Bd3 (Fou actif (mobilité 9) — 8 % des parties).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Plan principal. Exploiter l'avant-poste d5.

Atouts. Les Noirs s'appuient sur une majorité de pions à l'aile dame (3 contre 2), un avant-poste en d5 et la colonne semi-ouverte d.

Côté adverse. Un mauvais fou en c1.

En contrepartie. Plusieurs pièces dorment encore (le fou c8 et la tour a8).

Plans. ...Ba5 (32 % des parties) ; ...cxd4 (Capture en d4, Occuper le centre — 29 % des parties) ; ...Qc7 (10 % des parties) ; ...b5 (Expansion aile dame — 9 % des parties) ; ...b6 (Préparer le fianchetto — 7 % des parties).

Avantages

Faiblesses

Diagonale active

Plans

Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	● f2→e3, e3→d4	● b7→a6, f7→e6
Passés	—	—
Majorité	—	● aile dame 3v2

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● e5 (2v1)	—
Cases faibles	—	—
Centre	● d4 (2v1), ● e5 (2v1)	—

Colonnes et diagonales

	♔ Blancs	♚ Noirs
Semi-ouvertes	● c	● d

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 1)
Bc4	● Bc4 Actif (mob. 6)
Bb4		● Bb4 Ok (mob. 3)
Bc8		● Bc8 Non développé (mob. 0)
Paire de fous	● Oui	● Oui
Non développées	2 (● c1, ● a1)	2 (● c8, ● a8)

Sécurité du roi

	♔ Blancs	♚ Noirs
Statut	● Roqué	● Roqué
Droits de roque	—	—

Thèmes

	♔ Blancs	♚ Noirs
Phase	Ouverture
Centre	mobile
Ruptures	● d4-d5	● …e6-e5

Partie
1953 Mar del Plata – Round 14 – Bolbochan, J. – 1/2-1/2 – Rossetto, Hector – G142 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 dxc4 7. Bxc4 a6 8. O-O c5 9. Qe2 Nbd7 10. Rd1 b5
1955 Zagreb – Round 6 – Minev, Nikolay N – 1/2-1/2 – Karaklajic, Nikola – G70 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. e3 O-O 6. Bd3 c5 7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 a6 10. Rd1 Qc7
1956 Moscow olm prel – Round 2 – Middleton, Ian – 0-1 – Karaklajic, Nikola – G48 1. d4 Nf6 2. Nf3 d5 3. c4 e6 4. Nc3 Bb4 5. e3 O-O 6. Bd3 c5 7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 a6 10. a3 cxd4
1957 Mar del Plata – Round 1 – Najdorf, Miguel – 1-0 – Kotov Lundqvist, Alex – G11 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. e3 O-O 6. Bd3 c5 7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 a6 10. a4 Nb6
1957 Mar del Plata – Round 15 – Najdorf, Miguel – 1-0 – Kotov Lundqvist, Alex – G128 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 d5 6. Bd3 c5 7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 a6 10. a4 Nb6
1957 New York ch-USA – Round 10 – Turner, Abe J – 1-0 – Bisguier, Arthur B – G60 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Nf3 O-O 6. Bd3 d5 7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 a6 10. a3 cxd4
1957 URS Ch, semi final – Round 10 – Lutikov, Anatoly S – 1/2-1/2 – Gipslis, Aivars – G109 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. e3 O-O 6. Bd3 c5 7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 a6 10. a3 Ba5
1957 URS Ch, semi final – Round 17 – Geller, Efim P – 1/2-1/2 – Boleslavsky, Isaac – G151 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Nf3 d5 6. Bd3 O-O 7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 a6 10. Rd1 b5
1958 GDR Ch Schkopau GER – Round 7 – Uhlmann, Wolfgang – 1-0 – Handel, Horst – G41 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Nf3 O-O 6. Bd3 d5 7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 a6 10. a3 Ba5
1958 Munich olm prel – Round 7 – Dittmann, Sieghart – 1/2-1/2 – Eliskases, Erich – G56 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 a6 10. a4 cxd4
1958 YUG Ch 13th – Round 10 – Sofrevski, Jovan – 1/2-1/2 – Puc, Stojan – G56 1. c4 Nf6 2. Nc3 e6 3. Nf3 d5 4. d4 Bb4 5. e3 c5 6. Bd3 a6 7. O-O dxc4 8. Bxc4 O-O 9. Qe2 Nbd7 10. Rd1 b5
1958 YUG Ch 13th – Round 8 – Trifunovic, Petar – 1/2-1/2 – Puc, Stojan – G42 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 d5 5. Nf3 c5 6. Bd3 dxc4 7. Bxc4 a6 8. O-O O-O 9. Qe2 Nbd7 10. a3 Ba5
1959 Asztalos Memorial 2nd – Round 8 – Uhlmann, Wolfgang – 1-0 – Beni, Alfred – G14 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 c5 6. Bd3 d5 7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 a6 10. a3 cxd4
1959 Marianske Lazne – Round 15 – Kozma, Julius – 1/2-1/2 – Rabar, Braslav – G101 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 c5 6. Bd3 d5 7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 a6 10. a4 cxd4
1960 Moscow CCCT – Round 6 – Polugaevsky, Lev – 0-1 – Kholmov, Ratmir D – G31 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 O-O 6. Nf3 d5 7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 a6 10. a3 Ba5
1960 URS Ch sf – Round 16 – Antoshin, Vladimir S – 1/2-1/2 – Polugaevsky, Lev – G126 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 c5 6. Bd3 d5 7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 a6 10. a3 Ba5
1961 Soviet-ch28 – Round 16 – Polugaevsky, Lev – 0-1 – Petrosian, Tigran A. – G26 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 a6 10. a3 cxd4
1961 Utrecht – Round 7 – Donner, Jan-Hein – 1/2-1/2 – O'Kelly, Albéric de Galway – G32 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 d5 6. Nf3 O-O 7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 a6 10. a4 cxd4
1961 Zagreb – Round 13 – Stupica, Janez – 1/2-1/2 – Rabar, Braslav – G106 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 a6 10. a4 cxd4
1962 Varna olm – Round 5 – Donner, Jan-Hein – 0-1 – Darga, Klaus – G218 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 d5 6. Nf3 O-O 7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 a6 10. a4 cxd4
1963 Alekhine Memorial – Round 1 – Antoshin, Vladimir S – 1-0 – Keres, Paul – G4 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 a6 10. a4 Qc7
1963 Capablanca Memorial – Round 12 – Cobo Arteaga, Eldis – 0-1 – Darga, Klaus – G110 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Nf3 O-O 6. Bd3 d5 7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 a6 10. Rd1 b5
1963 Moscow RUS – Round ? – Antoshin, Vladimir S – 1-0 – Keres, Paul Petrovich – G22 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 a6 10. a4 Qc7
1963 New York ch-USA – Round 9 – Evans, Larry – 1/2-1/2 – Reshevsky, Samuel – G36 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 O-O 6. Nf3 d5 7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 a6 10. a3 cxd4
1964 Reykjavik – Round 1 – Olafsson, Fridrik – 1-0 – Thorbergsson, Freysteinn – G3 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 c5 5. e3 O-O 6. Bd3 d5 7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 a6 10. a3 cxd4
1964 Reykjavik – Round 9 – Palmason, Gudmundur – 1/2-1/2 – Thorbergsson, Freysteinn – G49 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 O-O 6. Nf3 d5 7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 a6 10. a4 cxd4
1964 Tel Aviv olm prel – Round 6 – Addison, Wiliam G – 1-0 – Vinje, Arne – G217 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 c5 6. Bd3 d5 7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 a6 10. Rd1 Qc7
1965 Berlin tt – Round 1 – Donner, Jan-Hein – 1/2-1/2 – Unzicker, Wolfgang – G2 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 a6 10. a4 b6
1965 Hamburg etc – Round 9 – Donner, Jan-Hein – 1/2-1/2 – Hein-Unzicker, Wolfgang – G109 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 a6 10. a3 Ba5
1965 HUN-ch21 – Round 1 – Portisch, Ferenc – 0-1 – Varnusz, Egon – G28 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 a6 10. a4 Qc7
1965 Hungary – Round 1 – Farago, Ivan – 0-1 – Varnusz, Egon – G37 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 a6 10. a4 b6
1966 Hungary – Round 1 – Portisch, Ferenc – 0-1 – Tompa, Janos – G31 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 d5 6. Nf3 O-O 7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 a6 10. a3 cxd4
1966 La Habana olm fin-A – Round 3 – Panno, Oscar – 1/2-1/2 – Szabo, Ladislav – G46 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 a6 10. a4 cxd4
1966 La Habana olm fin-B – Round 10 – Vranesic, Zvonko – 1/2-1/2 – Johansson, Martin 1979 – G141 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 a6 10. a3 cxd4
1966 Panamerican – Round 1 – Yepez, Olavo – 1/2-1/2 – Pereira Cuellar, Miguel – G17 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 d5 6. Bd3 c5 7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 a6 10. a3 cxd4
1966 Santa Monica – Round 1 – Donner, Jan-Hein – 1/2-1/2 – Hein-Unzicker, Wolfgang – G3 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 a6 10. a3 Ba5
1966 Santa Monica – Round 16 – Reshevsky, Samuel – 1/2-1/2 – Unzicker, Wolfgang – G67 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 a6 10. a3 cxd4
1966 URS Team Ch – Round ? – Osnos, Viatcheslav – 1/2-1/2 – Giterman, Shlomo – G108 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 c5 6. Nf3 d5 7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 a6 10. a3 cxd4
1967 Budapest Bajnogsag 8th – Round 4 – Portisch, Ferenc – 1/2-1/2 – Varnusz, Egon – G22 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 a6 10. a3 cxd4
1967 Dundee – Round 3 – Gligorić, Svetozar – 1-0 – Pritchett, Craig W – G7 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 a6 10. a3 cxd4
1967 October Revolution 50 – Round 1 – Kortchnoi, V. – 1-0 – Shamkovich, L. – G22 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 c5 5. e3 O-O 6. Bd3 d5 7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 a6 10. a4 cxd4
1967 Sweden (ch) – Round 2 – Jansson, Borje – 1/2-1/2 – Johansson, Martin 1979 – G6 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 d5 6. Be2 dxc4 7. Bxc4 c5 8. O-O Nbd7 9. Qe2 a6 10. a3 Ba5
1968 Capablanca Memorial – Round 1 – Antoshin, Vladimir S – 1/2-1/2 – Jimenez Zerquera, Eleazar – G13 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 c5 5. e3 O-O 6. Bd3 d5 7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 a6 10. a4 Qc7
1968 Cardenas/Matanzas/Santa Clara – Round 10 – Yepez, Olavo – 1/2-1/2 – Cobo Arteaga, Eldis – G47 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 c5 6. Nf3 d5 7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 a6 10. a4 b6
1968 CSR Ch – Round 9 – Kozma, Julius – 1/2-1/2 – Augustin, Josef – G76 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 c5 6. Nf3 d5 7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 a6 10. a3 Ba5
1968 Lugano olm – Round 1 – Portisch, Lajos – 1-0 – Panno, Oscar – G1 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 O-O 6. Nf3 d5 7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 a6 10. a4 cxd4
1968 Olympiad Final A – Round 1 – Panno, Oscar – 1/2-1/2 – Brinck-Claussen, Bjorn – G9 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 a6 10. a4 cxd4
1969 Moskou ch-URS – Round 1 – Furman, Slavomir – 1/2-1/2 – Platonov, Igor – G48 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 c5 6. Nf3 d5 7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 a6 10. a3 Ba5
1969 Zagreb – Round 1 – Udovcic, Mijo – 0-1 – Damjanovic, Marko – G5 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 d5 6. Nf3 O-O 7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 a6 10. a4 b6
1974 Manila – Round 10 – Kraidman, Yair – 1/2-1/2 – Andersson, Ulf – G51 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 O-O 6. Nf3 d5 7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 a6 10. a4 cxd4
41. Olympiad Open 2014 – Round 5.18 – Sambuev, Bator – 1-0 – Akobian, Varuzhan – G332 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 a6 10. a3 Ba5
42. Olympiad 2016 – Round 2.31 – Bogner, Sebastian – 1/2-1/2 – Mareco, Sandro – G129 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 a6 10. a3 Ba5
Rio de Janeiro Interzonal 1979 – Round 11 – Portisch, Lajos – 1-0 – Balashov, Yuri S – G32 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 c5 6. Nf3 d5 7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 a6 10. a4 Qc7
XXVII SuperGM 2010 – Round 2 – Grischuk, Alexander – 1-0 – Gelfand, Boris – G4 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 a6 10. a4 cxd4

E55e — Main Line, Bronstein (1953)

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 c5 7.O-O dxc4 8.Bxc4 Nbd7 9.Qe2 a6

Les coups candidats

10.a3 — 43.5% (134 parties)

Ambassadeurs : Donner, Jan-Hein (5x), Polugaevsky, Lev (3x), Unzicker, Ferdinand, Dr. (3x), Portisch, Ferenc (3x), Pritchett, Craig W (2x), Aadhitha Karikalan (2x), Rapaka Samuel Paul (2x), Johansson, Martin 1979 (2x)

10.a4 — 37.7% (116 parties)

Ambassadeurs : Panno, Oscar (4x), Zurakhov, Vladlen Y (3x), Donner, Jan-Hein (3x), Abanin, Vladimir (3x), O'Kelly, Albéric de Galway (3x), Azmaiparashvili, Zurab (3x), Portisch, Lajos (3x), Miguel, Nahuel (2x)

10.Rd1 — 8.8% (27 parties)

Ambassadeurs : Kosten, Anthony C. (2x), Raisa, Unto (1x), Stenborg, Ake (1x), Cobo Arteaga, Eldis (1x), Darga, Klaus (1x), Sofrevski, Jovan (1x), Puc, Stojan (1x), Bolbochan, Jacobo (1x)

10.Bd3 — 8.4% (26 parties)

Ambassadeurs : Lombard, Andre (3x), Smyslov, Vasily (3x), Holm, Sejer (1x), Abeysinghe, Jihansa Siyasari (1x), Ogaard, Leif (1x), Thorbergsson, Freysteinn (1x), Gligoric, Sofija (1x), Unzicker, Ferdinand, Dr. (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	10.a3	10.a4	10.Rd1	10.Bd3
<1800	9	44%	44%	—	11%
1800-2200	53	51%	30%	6%	9%
2200-2600	133	44%	32%	11%	11%
2600+	9	22%	67%	—	11%

Évolution par décennie (% des parties)

Décennie	N parties	10.a3	10.a4	10.Rd1	10.Bd3
1950s	19	37%	37%	26%	—
1960s	63	41%	51%	6%	2%
1970s	40	32%	45%	8%	12%
1980s	25	64%	36%	—	—
1990s	23	35%	26%	22%	17%
2000s	48	44%	27%	4%	25%
2010s	82	48%	35%	9%	5%
2020s	8	50%	25%	12%	—

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
10.a3	48%	50%	▲ +2.4%
10.a4	35%	25%	▼ -10.4%
10.Rd1	9%	12%	▲ +4.0%
10.Bd3	5%	0%	▼ -4.9%

Joueurs célèbres

Champions du monde dans cette position

Smyslov, Vladimir — 2 parties
Kasparov, Garry — 2 parties
Karpov, Anatoly — 1 partie

Parties historiques

10.a3 — 43.5% (134 parties)

1955 — Udovcic, Mijo vs Aadhitha Karikalan — 1-0 — Zagreb CRO
1956 — Middleton, Ian vs Aadhitha Karikalan — 0-1 — Moscow RUS
1957 — Lutikov, Anatoly S vs Gipslis, Aivars — 1/2-1/2 — Sverdlovsk
1957 — Turner, Abe J vs Bisguier, Arthur B — 1-0 — New York ch-USA
1958 — Trifunovic, Petar vs Puc, Stojan — 1/2-1/2 — Sarajevo BIH

10.a4 — 37.7% (116 parties)

1957 — Miguel, Nahuel vs Kotov, Alexander — 1-0 — Mar del Plata ARG
1957 — Miguel, Nahuel vs Kotov, Alexander — 1-0 — Mar del Plata ARG
1957 — Kluger, Gyula vs Rejfir, Josef — 1-0 — Varna BUL
1958 — Boleslavsky, Isaac vs Zurakhov, Vladlen Y — 1-0 — ?
1958 — Boleslavsky, Isaac vs Zurakhov, Vladlen Y — 1-0 — Kijva

10.Rd1 — 8.8% (27 parties)

1953 — Bolbochan, Jacobo vs Rossetto, Hector — 1/2-1/2 — Mar del Plata ARG
1955 — Minev, Nikolay N vs Aadhitha Karikalan — 1/2-1/2 — Zagreb CRO
1957 — Geller, Efim P. vs Boleslavsky, Isaac — 1/2-1/2 — Kiev UKR
1958 — Sofrevski, Jovan vs Puc, Stojan — 1/2-1/2 — Sarajevo BIH
1958 — Kazic, Bozidar vs Borsony, Valt — 1/2-1/2 — ?

10.Bd3 — 8.4% (26 parties)

1967 — Holm, Sejer vs Abeysinghe, Jihansa Siyasari — 0-1 — Halle zt
1970 — Gligoric, Sofija vs Unzicker, Ferdinand, Dr. — 1/2-1/2 — Lugano SUI
1974 — Ogaard, Leif vs Thorbergsson, Freysteinn — 1-0 — Reykjavik ISL
1976 — Lombard, Andre vs Smyslov, Vasily — 1/2-1/2 — Biel SUI
1976 — Lombard, Andre vs Smyslov, Vasily — 1/2-1/2 — Biel SUI

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