Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	—	● d6→e5, b7→a6, c7→d6
Passés	—	—
Majorité	—	—

Cases

	♔ Blancs	♚ Noirs
Cases fortes	—	● d4 (2v1)
Cases faibles	—	—
Centre	● d5 (1v0)	● d4 (2v1), ● e5 (2v1)

Colonnes et diagonales

♔ Blancs

♚ Noirs

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 0)
Ba4	● Ba4 Ok (mob. 3)
Bc8		● Bc8 Non développé (mob. 5)
Bf8		● Bf8 Non développé (mob. 1)
Paire de fous	● Oui	● Oui
Clouages	—	● knight c6
Non développées	4 (● b1, ● c1, ● a1, ● h1)	5 (● g8, ● 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	fermé
Ruptures	● d2-d4	● …d6-d5, ● …f7-f5

C71a — Spanish: Modern Steinitz Defence

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 * ○ Trait aux Blancs

Ouverture — Centre fermé

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

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Plans. c3 (Renforcer le centre — 36 % des parties) ; O-O (Mettre le roi en sécurité, connecter les tours — 30 % des parties) ; Bxc6+ (Fou actif (mobilité 6) — 19 % des parties) ; d4 (Occuper le centre — 8 % des parties).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

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Plans. ...Bd7 (Fou actif (mobilité 5), Développer c8 — 42 % des parties) ; ...Bg4 (Fou actif (mobilité 7), Développer c8 — 11 % des parties) ; ...f5 (Attaque à l'aile roi — 10 % des parties) ; ...b5 (Expansion aile dame — 7 % des parties) ; ...Nf6 (Développer g8 — 7 % des parties).

Avantages

Faiblesses

Diagonale active

Plans

Partie
1922 Bad Pistyan Breyer Memorial-B – Round ? – Balogh, Janos – 1-0 – Gargulak Metodej – G8 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. d3 f5 6. Nc3 Nf6 7. Qe2 fxe4 8. dxe4 b5 9. Bb3 Na5 10. Bd2 Nxb3
1924 Weston – Round 4 – Thomas, George Alan – 1-0 – Wainwright George Edward – G9 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. Qe2 g6 6. c3 Bg7 7. O-O Ne7 8. Rd1 h6 9. d4 b5 10. Bb3 exd4
1925 Baden-Baden – Round 12 – Mieses, Jacques – 0-1 – Yates, Frederic D – G135 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. h3 Nf6 6. d3 Be7 7. Nc3 O-O 8. Be3 b5 9. Bb3 Na5 10. Qd2 Nxb3
1932 BCF Ch 25th – Round 6 – Yates, Frederic D – 0-1 – Thomas, George Alan – G18 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. d3 Be7 6. c4 Nf6 7. h3 Nd7 8. Be3 Bf6 9. Nc3 Nc5 10. Bxc5 dxc5
1957 URS Ch, semi final – Round 14 – Goldberg, Grigory – 1-0 – Bannik, Anatolij – G130 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. Qe2 Bd7 6. c3 g6 7. d4 Bg7 8. Bg5 Nge7 9. d5 Nb8 10. Bc2 c5
1959 Kiel – Round 2 – Richter, Erik – 0-1 – Teschner, Rudolf – G4 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. h3 Nf6 6. O-O b5 7. Bb3 Na5 8. Qe2 Be7 9. c3 Nxb3 10. axb3 Bb7
1962 CSR Ch – Round 11 – Augustin, Josef – 1/2-1/2 – Kupka, Slavoj – G93 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. d3 Ne7 6. c4 Bd7 7. Nc3 h6 8. Be3 Ng6 9. h3 Be7 10. d4 O-O
1963 Hamburg BUE Cup – Round 10 – Beyer, Hans-Joachim – 0-1 – Schoenmann, Wilhelm – G10 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. h3 Bd7 6. d3 Nf6 7. c4 Be7 8. Nc3 O-O 9. Be3 Ne8 10. g4 g6
1964 CSR Ch – Round 3 – Hajek, Michal – 1/2-1/2 – Zíta, František – G24 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. h3 Bd7 6. c3 g6 7. d4 Bg7 8. Bc2 Nf6 9. Nbd2 Qe7 10. d5 Nd8
1967 DEN Ch – Round 10 – Pedersen, Karl – 1/2-1/2 – Enevoldsen, Jens – G38 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. d3 b5 6. Bb3 Na5 7. Nc3 Nxb3 8. axb3 Bb7 9. O-O c5 10. Qe2 Be7

C71a — Morphy Defense, Modern Steinitz Defense (1922)

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6

Les coups candidats

5.c3 — 36.8% (7682 parties) →

Ambassadeurs : Yandemirov, Valeri (53x), Sliwa, Bogdan (38x), Ciocaltea, Victor (31x), Nezhmetdinov, Rashid (28x), Correia, Francisco (23x), Sampson, H Wayne (20x), Shianovsky, Vladislav I (19x), Tal, Mikhail (18x)

5.O-O — 35.0% (7302 parties) →

Ambassadeurs : Westerinen, Heikki M.J. (48x), Ciocaltea, Victor (41x), Klovans, Janis (37x), ? (30x), Yandemirov, Valeri (29x), Ivkov, Borislav (28x), Vorotnikov, Vladislav V (26x), Keres, Paul Petrovich (24x)

5.Bxc6+ — 12.5% (2615 parties) →

Ambassadeurs : Ciocaltea, Victor (21x), Sliwa, Bogdan (19x), Westerinen, Heikki M.J. (19x), Hecht, Hans-Joachim (12x), Mestrovic, Zvonimir (12x), Anic, Darko (11x), Gretarsson, Helgi Ass (11x), Weill, Roland (10x)

5.d4 — 7.9% (1648 parties) →

Ambassadeurs : Medina-Garcia, Antonio (8x), Upton, Timothy J (7x), Keres, Paul (5x), Schweber, Samuel (5x), Blatny, Frantisek (4x), Keres, Paul Petrovich (4x), OBrien, Erik Michael (4x), Ciocaltea, Victor (4x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	5.c3	5.O-O	5.Bxc6+	5.d4
<1800	1079	35%	35%	6%	12%
1800-2200	6382	38%	33%	9%	10%
2200-2600	8007	35%	39%	14%	5%
2600+	424	34%	53%	9%	1%

Évolution par décennie (% des parties)

Décennie	N parties	5.c3	5.O-O	5.Bxc6+	5.d4
1950s	860	54%	8%	23%	5%
1960s	1409	41%	30%	17%	6%
1970s	1526	26%	43%	19%	6%
1980s	1357	30%	37%	20%	7%
1990s	3004	35%	28%	18%	10%
2000s	4355	38%	32%	12%	10%
2010s	5211	41%	35%	8%	8%
2020s	3163	32%	49%	5%	5%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
5.c3	41%	32%	▼ -9.4%
5.O-O	35%	49%	▲ +13.5%
5.Bxc6+	8%	5%	▼ -3.1%
5.d4	8%	5%	▼ -3.0%

Joueurs célèbres

Champions du monde dans cette position

Tal, Mikhail — 10 parties
Anand, Viswanathan — 10 parties
Kasparov, Garry — 6 parties
Smyslov, Vladimir — 5 parties
Karpov, Anatoly — 5 parties
Carlsen, Magnus — 5 parties
Hou, Yifan — 5 parties
Ju, Wenjun — 3 parties
Kramnik, Vladimir — 3 parties
Gukesh D — 2 parties
Botvinnik, Mikhail — 1 partie
Karpov, Aleksandr — 1 partie

Parties historiques

5.c3 — 36.8% (7682 parties)

1950 — Schmid, Lothar vs Gumprich, Kurt — 1-0 — FRG-ch01 corr5052
1950 — Keres, Paul vs Bondarevsky, Igor — 1/2-1/2 — Moscow RUS
1950 — Keres, Paul Petrovich vs Bondarevsky, Igor — 1/2-1/2 — 06 Moskva ch-SU
1950 — Teschner, Rudolf vs Pfeiffer, Gerhard — 1/2-1/2 — FRG-ch Bad Pyrmont GER
1950 — Wade, Robert G vs Schmid, Lothar — 1-0 — m

5.O-O — 35.0% (7302 parties)

1950 — Vajda, Arpad vs Szabo, Laszlo — 1/2-1/2 — Budapest HUN
1950 — Unzicker, Ferdinand, Dr. vs Saemisch, Friedrich — 1-0 — Travemuende
1950 — Cuadrado Pastor, Antonio vs Wood, Gabriel — 1/2-1/2 — corr Wch1
1950 — Bergqvist, Nils vs Staudte, Hans-Hilmar — 0-1 — Dubrovnik olm
1950 — Herrmann, Ludwig vs Elstner, Rudolf — 0-1 — Soemmerda GER

5.Bxc6+ — 12.5% (2615 parties)

1950 — Matanovic, Aleksandar vs Milic, Borislav — 1/2-1/2 — Bled SLO
1950 — Yudovich, Mikhail M vs Sokolsky, Alexey — 1-0 — ?
1950 — Rabar, Braslav vs Milic, Borislav — 1/2-1/2 — Bled SLO
1950 — Bonch-Osmolovsky, Mikhail vs Golovko, Alexandr — 1/2-1/2 — Moscow RUS
1950 — Sokolsky, Alexey vs Goldenov, Boris P — 0-1 — Kiev UKR

5.d4 — 7.9% (1648 parties)

1950 — Malchev, Andrej vs Neikirkh, Oleg — 1-0 — Sofia BUL
1950 — Fox, Maurice vs Bohatirchuk, Fedor — 0-1 — Montreal CAN
1950 — Marshall, Walter Charles vs Olafsson, Fridrik — 1/2-1/2 — Birmingham ENG
1951 — Baay, Jacob vs Foster, PM. — 1-0 — Brisbane AUS
1951 — Fuderer, Andrija vs Abdi, Andreas — 1-0 — Ljubljana