A77a — Benoni: Classical, Main Line, 10.Nd2

1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2 O-O 9.O-O Re8 10.Nd2 * ● Trait aux Noirs

Ouverture — Centre fermé

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

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Plans. a4 (41 % des parties) ; f3 (Poussée — 29 % des parties) ; Re1 (9 % des parties) ; f4 (Attaque à l'aile roi — 8 % des parties) ; Qc2 (5 % des parties).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

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Plans. ...Na6 (Développer b8 — 40 % des parties) ; ...Nbd7 (Développer b8 — 37 % des parties) ; ...a6 (Préparer expansion aile dame — 18 % des parties).

Avantages

Faiblesses

Diagonale active

Plans

Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	● e4→d5	● d6→c5, f7→g6, h7→g6
Passés	—	—
Majorité	—	● aile dame 3v2

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● c4 (2v0), ● b5 (2v0)	● g4 (2v1), ● e5 (2v0)
Cases faibles	● e4	● d5
Centre	● d5 (2v1)	● d4 (1v0), ● e5 (2v0)

Colonnes et diagonales

	♔ Blancs	♚ Noirs
Semi-ouvertes	● c	● e

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 0)
Be2	● Be2 Actif (mob. 7)
Bg7		● Bg7 Ok (mob. 3)
Bc8		● Bc8 Non développé (mob. 5)
Paire de fous	● Oui	● Oui
Non développées	2 (● c1, ● a1)	3 (● b8, ● c8, ● a8)

Sécurité du roi

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

Thèmes

	♔ Blancs	♚ Noirs
Phase	Ouverture
Centre	fermé
Ruptures	● e4-e5	—

Partie
1950 URS Ch sf – Round 1 – Boleslavsky, Isaac – 1/2-1/2 – Nezhmetdinov, Rashid – G2 1. d4 Nf6 2. c4 e6 3. Nc3 c5 4. d5 exd5 5. cxd5 d6 6. e4 g6 7. Be2 Bg7 8. Nf3 O-O 9. O-O Re8 10. Nd2 b6
1951 Schlechter Memorial – Round ? – Mueller, Hans – 0-1 – Czerniak, Moshe – G11 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. Be2 O-O 9. O-O Re8 10. Nd2 b6
1954 Amsterdam olm – Round 1 – Lemaire De Wit, Raphael – 1-0 – Wade, Robert G – G43 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 g6 6. e4 d6 7. Nf3 Bg7 8. Be2 O-O 9. O-O Re8 10. Nd2 b6
1956 Moskou olm – Round 3 – Jimenez Rojas, Hector – 1/2-1/2 – Thorbergsson, Freysteinn – G6 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 c5 6. d5 O-O 7. Nf3 e6 8. O-O exd5 9. cxd5 Re8 10. Nd2 b6
1963 New York ch-USA – Round 1 – Byrne, Ray – 1/2-1/2 – Lopez Masis, Kenard Evans – G7 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. Be2 O-O 9. O-O Re8 10. Nd2 b6
1964 DDR Ch 14th – Round 7 – Kuettner, Uwe – 1-0 – Muehlberg, Siegfried – G9 1. d4 Nf6 2. c4 c5 3. d5 g6 4. Nc3 d6 5. e4 Bg7 6. Be2 O-O 7. Nf3 e6 8. O-O exd5 9. cxd5 Re8 10. Nd2 b6
1964 Tel Aviv olm fin-A – Round 6 – Acosta Garcia, Rafael Isaac – 1-0 – Szabo, Ladislav – G122 1. d4 Nf6 2. c4 e6 3. Nc3 c5 4. d5 exd5 5. cxd5 d6 6. e4 g6 7. Be2 Bg7 8. Nf3 O-O 9. O-O Re8 10. Nd2 b6
1965 Santiago – Round 11 – Pilnik, Herman – 1-0 – Quinones Carrillo, Oscar – G21 1. d4 Nf6 2. c4 e6 3. Nc3 c5 4. d5 exd5 5. cxd5 d6 6. Nf3 g6 7. e4 Bg7 8. Be2 O-O 9. O-O Re8 10. Nd2 b6
1967 Venice Venice ITA – Round 12 – Donner, Jan-Hein – 1-0 – Janosevic, Dragoljub – G37 1. d4 Nf6 2. c4 c5 3. d5 d6 4. Nc3 g6 5. Nf3 Bg7 6. e4 O-O 7. Be2 e6 8. O-O exd5 9. cxd5 Re8 10. Nd2 b6

A77a — Classical Variation, Czerniak Defense, Tal Line (1950)

1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2 O-O 9.O-O Re8 10.Nd2

Les coups candidats

10…Na6 — 40.3% (1640 parties) →

Ambassadeurs : Matulovic, Milan (16x), Donner, Jan-Hein (12x), Janosevic, Dragoljub (11x), Gligoric, Sofija (10x), Marholev, Dimitar (10x), Vranesic, Zvonko (9x), Tal, Mikhail (8x), Portisch, Lajos (8x)

10…Nbd7 — 36.8% (1494 parties) →

Ambassadeurs : Velimirovic, Dragoljub (16x), Bakheet Farag (11x), Nunn, John D M (10x), Gligoric, Sofija (9x), ? (8x), Velickovic, Sasa (7x), Donner, Jan-Hein (6x), Polugaevsky, Lev (6x)

10…a6 — 17.9% (726 parties) →

Ambassadeurs : Rossetto, Hector (4x), Eros, Pal (4x), ? (4x), Moody, David W (3x), Radev, Nikolai (2x), Maedler, Juergen, Dr. (2x), Panno, Oscar (2x), Donner, Jan-Hein (2x)

10…b6 — 3.8% (155 parties)

Ambassadeurs : Donner, Jan-Hein (3x), Nezhmetdinov, Rashid (2x), Janosevic, Dragoljub (2x), Szabo, Laszlo (2x), Romanishin, Oleg M (2x), Alonzo Castillo Jimenez (1x), Thorbergsson, Freysteinn (1x), Kuettner, Uwe (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	10…Na6	10…Nbd7	10…a6	10…b6
<1800	128	30%	38%	29%	3%
1800-2200	1244	36%	34%	23%	5%
2200-2600	1738	41%	40%	14%	4%
2600+	47	34%	55%	9%	2%

Évolution par décennie (% des parties)

Décennie	N parties	10…Na6	10…Nbd7	10…a6	10…b6
1950s	40	62%	15%	12%	10%
1960s	182	79%	5%	9%	5%
1970s	472	48%	36%	12%	3%
1980s	665	39%	45%	13%	2%
1990s	551	41%	35%	20%	3%
2000s	888	38%	37%	20%	5%
2010s	936	32%	39%	23%	5%
2020s	331	39%	36%	21%	4%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
10…Na6	32%	39%	▲ +6.8%
10…Nbd7	39%	36%	▼ -3.8%
10…a6	23%	21%	▼ -1.4%
10…b6	5%	4%	▼ -0.7%

Joueurs célèbres

Champions du monde dans cette position

Tal, Mikhail — 10 parties
Kramnik, Vladimir — 2 parties
Hou, Yifan — 2 parties
Carlsen, Magnus — 1 partie

Parties historiques

10…Na6 — 40.3% (1640 parties)

1954 — Kholmov, Ratmir D vs Sardarov, Edward — 0-1 — Riga LAT
1955 — Portisch, Lajos vs Dely, Peter — 1-0 — Hungary ch
1955 — Lilienthal, Andor vs Scherbakov, Aleksandr — 1-0 — USSR
1955 — Lilienthal, Andor vs Sherbakov, Vitaly — 1-0 — Moscow RUS
1955 — Birbrager, Isaak vs Tal, Mikhail — 1/2-1/2 — Voroshilovgrad

10…Nbd7 — 36.8% (1494 parties)

1951 — Budo, Ervis vs Aronin, Lev — 1-0 — Moscow RUS
1954 — Zelinsky, Yuri vs Vedenski, N. — 0-1 — Riga LAT
1954 — Moiseev, Oleg vs Grechkin, Dmitry M — 0-1 — URS-chTJ Coop
1954 — Navarovszky, Laszlo vs Dely, Peter — 1-0 — Hungary ch
1955 — Schweber, Samuel vs Johannessen, Svein — 0-1 — Antwerp BEL

10…a6 — 17.9% (726 parties)

1950 — Ragozin, Viacheslav vs Aratovsky, Nikolay — 1/2-1/2 — URS ch
1954 — Ilivitsky, Georgy A vs Shaposhnikov, Yury — 0-1 — URS-ch sf Rostov on Don
1955 — Panno, Oscar vs Rossetto, Hector — 0-1 — Buenos Aires ARG
1955 — Guimard, Carlos E vs Rossetto, Hector — 1/2-1/2 — Buenos Aires ARG
1958 — Milev, Zdravko vs Peev, Georgi — 1-0 — Sofia BUL

10…b6 — 3.8% (155 parties)

1950 — Boleslavsky, Isaac vs Nezhmetdinov, Rashid — 1/2-1/2 — Gorki
1951 — Mueller, Hans vs Czerniak, Moshe — 0-1 — Vienna AUT
1954 — Lemaire, Robert vs Wade, Robert G — 1-0 — Amsterdam olm
1956 — Alonzo Castillo Jimenez vs Thorbergsson, Freysteinn — 1/2-1/2 — Moscow RUS
1961 — Polugaevsky, Lev vs Nezhmetdinov, Rashid — 1-0 — Omsk RUS