C49q — Four Knights: Symmetrical, Metger, 10.d4 Ne6 11.Bc1 Rd8

1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bb4 5.O-O O-O 6.d3 d6 7.Bg5 Bxc3 8.bxc3 Qe7 9.Re1 Nd8 10.d4 Ne6 11.Bc1 Rd8 * ○ Trait aux Blancs

Ouverture — Centre fermé

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Atouts. Les Blancs s'appuient sur la case forte g5, un fou actif en b5, la paire de fous et la colonne semi-ouverte b.

Côté adverse. Le fou enfermé en c8.

En contrepartie. Plusieurs pièces dorment encore (le fou c1 et la tour a1) et le pion isolé a2.

Plans. Bg5 (Clouer Nf6) ; h3 (Empêcher ...Bg4) ; Tour sur colonne b.

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Atouts. Les Noirs s'appuient sur la case forte f4 et un avant-poste en f4.

Côté adverse. Le pion isolé a2 et le fou enfermé en c1.

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

Plans. ...Bg4 (Développer Bc8, clouer Nf3) ; ...c6 (Rupture) ; ...c5 (Rupture) ; ...d5 (Rupture).

Avantages

Faiblesses adverses

Diagonale active

Plans

Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	● c2, ● c3	—
Pions isolés	● a2	—
Arriérés	—	—
Chaînes	● c3→d4	● d6→e5, c7→d6
Passés	—	—
Majorité	—	—

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● g5 (2v1)	● f4 (2v1)
Cases faibles	—	—
Centre	● d4 (3v2), ● e5 (2v1)	—

Colonnes et diagonales

	♔ Blancs	♚ Noirs
Semi-ouvertes	● b	—

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 7)
Bb5	● Bb5 Actif (mob. 9)
Bc8		● Bc8 Non développé (mob. 1)
Paire de fous	● Oui	Non
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	fermé
Ruptures	● c3-c4, ● d4-d5	● …c7-c6, ● …c7-c5, ● …d6-d5

Partie
1906 DSB-15.Kongress – Round 15 – Wolf Heinrich – 1/2-1/2 – Vidmar, Milan Sr – G92 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 Bxc3 7. bxc3 d6 8. Bg5 Qe7 9. Re1 Nd8 10. d4 Ne6
1909 BCF Ch 6th – Round 9 – Atkins, Henry Ernest – 1-0 – Yates, Frederic D – G38 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 d6 7. Bg5 Bxc3 8. bxc3 Qe7 9. Re1 Nd8 10. d4 Ne6
1910 Hamburg Hauptturnier-B – Round 1 – Schoenmann, Wilhelm – 0-1 – Bodenstein, Hugo – G10 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 Bxc3 7. bxc3 d6 8. Bg5 Qe7 9. Re1 Nd8 10. d4 Ne6
1912 Temesvary – Round 1 – Von Balla, Zoltan – 0-1 – Mayer Prieto, Rodolfo – G45 1. e4 e5 2. Nf3 Nf6 3. Nc3 Nc6 4. Bb5 Bb4 5. O-O O-O 6. d3 Bxc3 7. bxc3 d6 8. Bg5 Qe7 9. Re1 Nd8 10. d4 Ne6
1914 DSB-19.Kongress – Round 5 – Spielmann, Rudolf – 1/2-1/2 – Vidmar, Milan Sr – G37 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 Bxc3 7. bxc3 d6 8. Bg5 Qe7 9. Re1 Nd8 10. d4 Ne6
1918 New York m – Round 14 – Chajes, Oscar – 1-0 – Janowski, Dawid – G13 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 d6 7. Bg5 Bxc3 8. bxc3 Qe7 9. Re1 Nd8 10. d4 Ne6
1918 New York m – Round 6 – Chajes, Oscar – 1/2-1/2 – Janowski, Dawid – G5 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 d6 7. Bg5 Bxc3 8. bxc3 Qe7 9. Re1 Nd8 10. d4 Ne6
1923 Karlsbad – Round 1 – Wolf, Hans-Josef – 1/2-1/2 – Teichmann, Radek – G90 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 d6 7. Bg5 Bxc3 8. bxc3 Qe7 9. Re1 Nd8 10. d4 Ne6
1923 Maehrisch Ostrau – Round 6 – Wolf, Hans-Josef – 0-1 – Bogoljubow, Efim – G36 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 d6 7. Bg5 Bxc3 8. bxc3 Qe7 9. Re1 Nd8 10. d4 Ne6
1947 Nt Lueneburg GER – Round 18 – Rautenberg, Wilhelm – 0-1 – Saemisch, Friedrich – G47 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 Bxc3 7. bxc3 d6 8. Bg5 Qe7 9. Re1 Nd8 10. d4 Ne6
1948 New York – Round 1 – Platz, Joseph – 1/2-1/2 – Evans, Larry – G11 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 Bxc3 7. bxc3 d6 8. Bg5 Qe7 9. Re1 Nd8 10. d4 Ne6
1948 US Open – Round 2 – Whitaker, Norman – 1-0 – Tenner, Oscar – G11 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. Nc3 Bb4 5. O-O O-O 6. d3 d6 7. Bg5 Bxc3 8. bxc3 Qe7 9. Re1 Nd8 10. d4 Ne6
1948 World Championship 18th – Round 24 – Botvinnik, Mikhail – 1-0 – Reshevsky, Samuel – G17 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 Bxc3 7. bxc3 d6 8. Bg5 Qe7 9. Re1 Nd8 10. d4 Ne6
1958 UKR Ch – Round 13 – Gorenstein, Rafail Yakovlevich – 1-0 – Zamikhovsky, Abram – G61 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 Bxc3 7. bxc3 d6 8. Bg5 Qe7 9. Re1 Nd8 10. d4 Ne6
Bugojno 1986 – Round 6 – Spassky, Boris V. – 1/2-1/2 – Jussupow, Artur – G32 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 d6 7. Bg5 Bxc3 8. bxc3 Qe7 9. Re1 Nd8 10. d4 Ne6
Bugojno 1986 – Round 6 – Spassky, Boris V. – 1/2-1/2 – Jussupow, Artur – G33 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 d6 7. Bg5 Bxc3 8. bxc3 Qe7 9. Re1 Nd8 10. d4 Ne6
FIDE GP 2002 – Round 1.1 – Grischuk, Alexander – 1/2-1/2 – Morozevich, Alexander – G10 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 d6 7. Bg5 Bxc3 8. bxc3 Qe7 9. Re1 Nd8 10. d4 Ne6
FIDE World Cup 2019 – Round 3.5 – Nepomniachtchi, Ian – 1-0 – Tomashevsky, Evgeny – G348 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 Bxc3 7. bxc3 d6 8. Bg5 Qe7 9. Re1 Nd8 10. d4 Ne6
FIDE-Wch k.o. 1997 – Round 2.3 – Hjartarson, Johann – 1/2-1/2 – Aleksandrov, Aleksej – G97 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. Nc3 Bb4 5. O-O O-O 6. d3 Bxc3 7. bxc3 d6 8. Bg5 Qe7 9. Re1 Nd8 10. d4 Ne6

C49q — Symmetrical Metger

1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bb4 5.O-O O-O 6.d3 d6 7.Bg5 Bxc3 8.bxc3 Qe7 9.Re1 Nd8 10.d4 Ne6 11.Bc1 Rd8

Eval: [+0.63]

Les coups candidats

12.Bf1 — 45.2% (119 parties)

Ambassadeurs : Khamatgaleev, Alexej (5x), Istratescu, Andrei (3x), Eisen, David J (2x), Tiemann, Christoph (2x), Bellin, Robert (2x), Short, Nigel D (2x), Tukmakov, Vladimir B (2x), Aleksandrov, Aleksej (2x)

12.a4 — 18.3% (48 parties)

Ambassadeurs : Jussupow, Artur (3x), Middelburg, Tom (2x), Pedersen, Nicolai Vesterbaek (2x), Thompson, Dexter (1x), Moody, David W (1x), Spassky, B. (1x), Spassky, Boris Vasily (1x), Tong, Yuanming (1x)

12.Nh4 — 12.2% (32 parties)

Ambassadeurs : Nunn, John D M (3x), Alekhine, Alexander (2x), Gokhale, Jayant Suresh (2x), Nijboer, Friso (2x), Ferguson, Mark (2x), Kimuto (1x), Kimuto Allies (1x), Rauser (1x)

12.g3 — 6.8% (18 parties)

Ambassadeurs : Chajes, Oscar (2x), Spielmann, Rudolf (2x), Janowski, Dawid (1x), Cortlever, Nico (1x), Broadbent, Reginald (1x), Loewy, Leopold Jr (1x), Wolf, Hans-Josef (1x), Bogoljubow, Efim (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	12.Bf1	12.a4	12.Nh4	12.g3
<1800	2	50%	—	50%	—
1800-2200	48	42%	23%	17%	4%
2200-2600	136	48%	18%	12%	3%
2600+	12	25%	50%	8%	8%

Évolution par décennie (% des parties)

Décennie	N parties	12.Bf1	12.a4	12.Nh4	12.g3
1900s	2	—	—	—	50%
1910s	9	—	—	11%	44%
1920s	4	25%	—	—	25%
1930s	3	—	—	100%	—
1940s	6	17%	—	—	33%
1950s	2	100%	—	—	—
1960s	1	100%	—	—	—
1970s	2	50%	—	50%	—
1980s	10	60%	30%	10%	—
1990s	79	42%	28%	16%	6%
2000s	76	58%	12%	7%	4%
2010s	61	48%	18%	13%	3%
2020s	8	12%	38%	—	—

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
12.Bf1	48%	12%	▼ -35.0%
12.a4	18%	38%	▲ +19.5%
12.Nh4	13%	0%	▼ -13.1%
12.g3	3%	0%	▼ -3.3%

Joueurs célèbres

Champions du monde dans cette position

Alekhine, Alexander — 2 parties
Botvinnik, Mikhail — 1 partie
Anand, Viswanathan — 1 partie

Parties historiques

12.Bf1 — 45.2% (119 parties)

1929 — Romanovsky, Arseniy vs Rochlin — 0-1 — Leningrad RUS
1948 — Botvinnik, Mikhail vs Reshevsky, Samuel — 1-0 — Den Haag/Moskau
1958 — Gorenstein, Rafail Yakovlevich vs Zamikhovsky, Abram — 1-0 — Kiev UKR
1958 — Alexander Ronald Cheng vs Barcza, Gedeon — 0-1 — Munchen olm
1960 — Lehmann, Heinz vs Dittmann, Sieghart — 1-0 — Marianske Lazne

12.a4 — 18.3% (48 parties)

1985 — Thompson, Dexter vs Moody, David W — 1-0 — Southfield, Mich.
1986 — Spassky, B. vs Jussupow, Artur — 1/2-1/2 — Bugojno BIH
1986 — Spassky, Boris Vasily vs Jussupow, Artur — 1/2-1/2 — Bugojno BIH
1993 — Yudasin, Leonid vs Huebner, Robert — 0-1 — Groningen NED
1993 — Adams, Michael vs Akopian, Vladimir — 1-0 — Groningen NED

12.Nh4 — 12.2% (32 parties)

1917 — Spielmann, Rudolf vs Vidmar, Milan Sr — 1-0 — Vienna AUT
1932 — Rauser vs Maya Ragozin, Cristhian — 1-0 — Kiev-Leningrad
1933 — Kimuto vs Alekhine, Alexander — 1-0 — Tokyo JPN
1933 — Alekhine, Alexander vs Kimuto Allies — 1-0 — Tokyo JPN
1979 — Yurtaev, Leonid vs Jussupow, Artur — 1/2-1/2 — Frunze KGZ

12.g3 — 6.8% (18 parties)

1909 — Atkins, Henry Ernest vs Yates, Frederic D — 1-0 — Scarborough ENG
1913 — Spielmann, Rudolf vs Loewy, Leopold Jr — 1-0 — Vienna AUT
1914 — Spielmann, Rudolf vs Vidmar, Milan Sr — 1/2-1/2 — Mannheim GER
1918 — Chajes, Oscar vs Janowski, Dawid — 1-0 — New York, NY USA
1919 — Chajes, Oscar vs Bernstein, Jacob — 1-0 — Troy

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