C49j — Four Knights: Symmetrical, Tarrasch Variation

1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bb4 5.O-O O-O 6.d3 d6 7.Bg5 Be6 * ○ Trait aux Blancs

Ouverture — Centre fermé

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Avantages : case forte c4, case forte e4, Bb5 actif, Bg5 actif, paire de fous.
Faiblesses adverses : Bb4 mauvais fou.
Plans :
● h3 — Empêcher ...Bg4
● c3 — Préparer d4

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Avantages : case forte d4, case forte g4, case forte c5, case forte e5, avant-poste d4(C), Bb4 actif, Be6 actif, paire de fous.
Faiblesses adverses : Bb5 mauvais fou.
Plans :
● ...Bg4 — Clouer Nf3
● ...d5 — Rupture

Avantages

Faiblesses adverses

Diagonale active

Plans

Structure de pions

C49j — Symmetrical Tarrasch Variation

1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bb4 5.O-O O-O 6.d3 d6 7.Bg5 Be6

Eval: [+0.83]

Les coups candidats

8.Nd5 — 39.1% (34 parties)

Ambassadeurs : Janowski, Dawid (2x), Baird, David (1x), Caro, Horatio (1x), Thomas, George Alan (1x), Yates, P (1x), Zalys, Ignas (1x), Beaudin, Leo (1x), Colias, Billy (1x)

8.Ne2 — 20.7% (18 parties)

Ambassadeurs : Atkins, Henry Ernest (2x), Wainwright snr, George Edward (2x), Heginbottom, George A (1x), Gouwentak, Hendrik (1x), Strick van Linschoten, Hein (1x), Gouwentak (1x), Van Linschoten Strick H (1x), Duras, Oldrich (1x)

8.d4 — 17.2% (15 parties)

Ambassadeurs : Macekova, Martina (2x), Alexovic, Juraj (2x), Tarrasch, Siegbert (1x), Lasker, Emanuel (1x), Gabinara, Antonio (1x), Romih, Max (1x), Drewitt, John Arthur James (1x), Crepeaux, Robert (1x)

8.a3 — 9.2% (8 parties)

Ambassadeurs : Chaves Perez, Sergio (1x), Vence Santorum, Maria Pilar (1x), Hatzakis, El (1x), Protopsaltis, Orfeas (1x), Pagalou, Maria (1x), Vourvahaki, Maria (1x), Senkyr, Martin (1x), Horsak, Jan (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	8.Nd5	8.Ne2	8.d4	8.a3
<1800	4	50%	—	—	—
1800-2200	34	38%	15%	21%	9%
2200-2600	14	50%	29%	7%	—

Évolution par décennie (% des parties)

Décennie	N parties	8.Nd5	8.Ne2	8.d4	8.a3
1890s	3	67%	33%	—	—
1900s	4	—	75%	25%	—
1910s	5	20%	60%	20%	—
1920s	1	—	—	100%	—
1940s	1	—	—	100%	—
1960s	1	100%	—	—	—
1970s	1	—	—	100%	—
1980s	1	100%	—	—	—
1990s	15	40%	27%	20%	—
2000s	23	52%	4%	—	17%
2010s	22	45%	14%	14%	9%
2020s	10	10%	30%	40%	20%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
8.Nd5	45%	10%	▼ -35.5%
8.Ne2	14%	30%	▲ +16.4%
8.d4	14%	40%	▲ +26.4%
8.a3	9%	20%	▲ +10.9%

Joueurs célèbres

Champions du monde dans cette position

Lasker, Emanuel — 1 partie

Parties historiques

8.Nd5 — 39.1% (34 parties)

1898 — Janowski, Dawid vs Caro, Horatio — 1-0 — Vienna AUT
1899 — Janowski, Dawid vs Baird, David — 1-0 — New York, NY USA
1914 — Thomas, George Alan vs Yates, P — 0-1 — Londen m
1960 — Zalys, Ignas vs Beaudin, Leo — 0-1 — Montreal CAN
1987 — Colias, Billy vs Aguila Corbett, Benjamin Andres — 1-0 — North Carolina

8.Ne2 — 20.7% (18 parties)

1894 — Heginbottom, George A vs Atkins, Henry Ernest — 0-1 — British CC
1907 — Znosko-Borovsky, Eugene vs Von Scheve, Theodor — 1/2-1/2 — Ostende II
1909 — Wainwright snr, George Edward vs Atkins, Henry Ernest — 1/2-1/2 — Scarborough ENG
1909 — Wainwright snr, George Edward vs Michell, Reginald — 0-1 — Scarborough ENG
1910 — Gouwentak, Hendrik vs Strick van Linschoten, Hein — 1-0 — Amsterdam NED

8.d4 — 17.2% (15 parties)

1908 — Tarrasch, Siegbert vs Lasker, Emanuel — 0-1 — GER
1913 — Janowski, Dawid vs Chajes, Oscar — 1-0 — Havana CUB
1925 — Drewitt, John Arthur James vs Crepeaux, Robert — 1-0 — Bromley
1947 — Gabinara, Antonio vs Romih, Max — 0-1 — Reggio nell'Emilia ITA
1976 — Letzelter, Jean-Claude vs Ott, Roland — 0-1 — Haifa ISR

8.a3 — 9.2% (8 parties)

2000 — Chaves Perez, Sergio vs Vence Santorum, Maria Pilar — 1/2-1/2 — Orense
2002 — Senkyr, Martin vs Horsak, Jan — 1-0 — Frydek Mistek CZE
2003 — Hatzakis, El vs Protopsaltis, Orfeas — 0-1 — Chania GRE
2003 — Pagalou, Maria vs Vourvahaki, Maria — 0-1 — Chania GRE
2012 — Perminaite, Guoda vs Waechter, Nathalie — 0-1 — Prague CZE

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	● c2→d3, d3→e4	● d6→e5, c7→d6
Passés	—	—
Majorité	—	—

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● c4 (2v1), ● e4 (2v1)	● d4 (2v1), ● g4 (2v0), ● c5 (2v0), ● e5 (2v1)
Cases faibles	—	● d5
Centre	● e4 (2v1)	● d4 (2v1), ● e5 (2v1)

Colonnes et diagonales

♔ Blancs

♚ Noirs

Pièces

	♔ Blancs	♚ Noirs
Bb5	● Bb5 Actif (mob. 4)
Bg5	● Bg5 Actif (mob. 7)
Bb4		● Bb4 Actif (mob. 4)
Be6		● Be6 Actif (mob. 9)
Paire de fous	● Oui	● Oui
Non développées	1 (a1)	1 (a8)

Sécurité du roi

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

Thèmes

	♔ Blancs	♚ Noirs
Phase	Ouverture
Centre	fermé
Ruptures	● d3-d4	● …d6-d5

Partie
1907 Ostende II – Round 16 – Znosko-Borovsky, Eugene – 1/2-1/2 – Von Scheve, Theodor – G196 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 d6 7. Bg5 Be6 8. Ne2 Ba5 9. Ng3 Nb8 10. d4 c6
1909 BCF Ch 6th – Round 1 – Wainwright snr, George Edward – 1/2-1/2 – Atkins, Henry Ernest – G1 1. e4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. Bb5 Bb4 5. O-O O-O 6. d3 d6 7. Bg5 Be6 8. Ne2 Ne7 9. Ng3 Ne8 10. c3 Ba5
1909 BCF Ch 6th – Round 5 – Wainwright snr, George Edward – 0-1 – Michell, Reginald – G24 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 d6 7. Bg5 Be6 8. Ne2 Ne7 9. Bxf6 gxf6 10. c3 Ba5

1907 Ostende II – Round 16 – Znosko-Borovsky, Eugene – 1/2-1/2 – Von Scheve, Theodor – G196

1909 BCF Ch 6th – Round 1 – Wainwright snr, George Edward – 1/2-1/2 – Atkins, Henry Ernest – G1

1909 BCF Ch 6th – Round 5 – Wainwright snr, George Edward – 0-1 – Michell, Reginald – G24