Structure de pions
♔ Blancs ♚ Noirs
Pions doublés — —
Pions isolés — —
Arriérés — —
Chaînes — ● d6→e5, c7→d6
Passés — —
Majorité — —
Cases
♔ Blancs ♚ Noirs
Cases fortes ● b5 (2v0), ● d5 (2v0) ● d4 (2v1)
Cases faibles — —
Centre ● d5 (2v0), ● e4 (1v0) ● d4 (2v1), ● e5 (2v1)
Colonnes et diagonales
♔ Blancs ♚ Noirs
Pièces
♔ Blancs ♚ Noirs
Bc1 ● Bc1 Non développé (mob. 0)
Bf1 ● Bf1 Non développé (mob. 0)
Bc8 ● Bc8 Non développé (mob. 5)
Bf8 ● Bf8 Non développé (mob. 1)
Paire de fous ● Oui ● Oui
Non développées 4 (● c1, ● f1, ● 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 mobile
Ruptures ● c4-c5, ● d2-d4 ● …d6-d5

A27b — English: Three Knights, 3…d6

1.c4 e5 2.Nc3 Nc6 3.Nf3 d6 *   ○ Trait aux Blancs

Ouverture — Centre mobile

♔ Point de vue Blancs

8 7 6 5 4 3 2 1
bR
bB
bQ
bK
bB
bN
bR
bP
bP
bP
bP
bP
bP
bN
bP
Case forte (2v0)
Case forte (2v0)
bP
wP
wN
wN
wP
wP
wP
wP
wP
wP
wP
wR
wB
wQ
wK
wB
wR
abcdefgh
Plans. d4 (Occuper le centre — 61 % des parties) ; g3 (Préparer le fianchetto — 26 % des parties) ; e3 (Libérer Bf1, préparer Bd3 — 5 % des parties).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8
wR
wB
wK
wQ
wB
wR
wP
wP
wP
wP
wP
wP
wP
wN
wN
Case forte (2v1)
wP
bP
bP
bN
bP
bP
bP
bP
bP
bP
bR
bN
bB
bK
bQ
bBFou actif — mobilité 5
bR
hgfedcba
Plans. ...Bg4 (Fou actif (mobilité 7), Développer c8 — 24 % des parties) ; ...g6 (Préparer le fianchetto — 19 % des parties) ; ...Nf6 (Développer g8 — 8 % des parties) ; ...f5 (Attaque à l'aile roi — 6 % des parties) ; ...Be6 (Fou actif (mobilité 7), Développer c8 — 6 % des parties).
Avantages
Faiblesses
Diagonale active
Plans
Partie
1925 Leningrad ch-URS – Round 4 – Rabinovich, Ilya Mar – 1-0 – Nenarokov, Vladimir – G7
1. c4 e5 2. Nc3 Nc6 3. Nf3 d6 4. d4 exd4 5. Nxd4 Nxd4 6. Qxd4 Nf6 7. g3 Be7 8. Bg2 O-O 9. b3 Re8 10. O-O Nd7
1934 Leningrad ch-URS – Round 1 – Mazel, Isaak Y – 0-1 – Riumin, Nikolai – G1
1. c4 e5 2. Nc3 Nc6 3. Nf3 d6 4. d4 f6 5. e3 Nh6 6. b3 g6 7. Bb2 Bg7 8. Qd2 O-O 9. O-O-O Nf7 10. Be2 Re8
1941 USSR – Round 1 – Ragozin, Viacheslav – 0-1 – Rovner, Dmitry – G1
1. c4 e5 2. Nc3 Nc6 3. Nf3 d6 4. g3 g6 5. d4 Bg4 6. dxe5 dxe5 7. Qa4 Bg7 8. Bg5 Qc8 9. Bg2 h6 10. Be3 Ne7
1951 FRG Ch Duesseldorf GER – Round 2 – Lehmann, Heinz – 1-0 – Pfeiffer, Gerhard – G2
1. c4 e5 2. Nc3 Nc6 3. Nf3 d6 4. d4 Bd7 5. e4 g6 6. d5 Nb8 7. g3 Bg7 8. Bg2 a5 9. O-O Nf6 10. Ne1 O-O
1956 Moscow olm fin-B – Round 3 – Ojanen, Kaarle S – 1/2-1/2 – Vestol, Aage – G23
1. c4 e5 2. Nc3 d6 3. Nf3 Nc6 4. d4 exd4 5. Nxd4 Bd7 6. Nc2 Nf6 7. e4 Be7 8. Be2 O-O 9. f4 Re8 10. O-O Bf8
1961 Katowice ch18-POL – Round 10 – Brzozka, Stefan – 1-0 – Klaput, Edward – G61
1. c4 e5 2. Nc3 Nc6 3. Nf3 d6 4. d4 exd4 5. Nxd4 g6 6. Nd5 Bg7 7. Nb5 Rb8 8. Ndxc7+ Kf8 9. Bf4 Bxb2 10. Qxd6+ Qxd6
1964 ESP Ch 29th – Round 13 – Bordell Rosell, Roman – 1-0 – Puig, Pedro – G51
1. c4 e5 2. Nc3 Nc6 3. Nf3 d6 4. d4 f6 5. d5 Nce7 6. e4 g6 7. g3 Bg7 8. Bg2 Nh6 9. h3 O-O 10. Be3 Nf7
1964 EU Team Ch sf – Round 5.7 – Maedler, Juergen, Dr. – 1/2-1/2 – Radovici, Corvin – G76
1. c4 e5 2. Nc3 Nc6 3. Nf3 d6 4. g3 g6 5. Bg2 Bg7 6. O-O Nge7 7. d3 O-O 8. Rb1 h6 9. Bd2 Be6 10. b4 Qd7
1964 YUG Ch 19th – Round 19 – Ivkov, Borislav – 1-0 – Mestrovic, Zvonimir – G17
1. c4 e5 2. Nc3 d6 3. Nf3 Nc6 4. d4 exd4 5. Nxd4 Nf6 6. g3 Be7 7. Bg2 Bd7 8. O-O O-O 9. b3 Nxd4 10. Qxd4 Bc6
1965 Sarajevo – Round 11 – Polugaevsky, Lev – 1-0 – Kozomara, Vlado – G73
1. c4 e5 2. Nc3 d6 3. Nf3 Nc6 4. d4 exd4 5. Nxd4 Nf6 6. e4 Be7 7. Be2 O-O 8. O-O Re8 9. Be3 Bf8 10. f3 Bd7
1967 Vrnjacka Banja zt – Round 16 – Bobotsov, Milko G – 1/2-1/2 – Bilyap, Siracettin – G109
1. c4 e5 2. Nc3 d6 3. Nf3 Nc6 4. d4 exd4 5. Nxd4 Nf6 6. e4 Be7 7. Be2 O-O 8. Be3 Re8 9. f3 Nxd4 10. Qxd4 Be6
1968 IBM I – Round 13 – Bronstein, David I – 1-0 – Shamkovich, Leonid – G45
1. c4 e5 2. Nc3 Nc6 3. Nf3 d6 4. d4 exd4 5. Nxd4 Nxd4 6. Qxd4 Ne7 7. b3 Nc6 8. Qd2 Be7 9. Nd5 Bf6 10. Nxf6+ Qxf6
1968 ROM Ch – Round 7 – Vaisman, Volodia – 1/2-1/2 – Szabo, Iuliu inactive – G38
1. c4 e5 2. Nc3 d6 3. Nf3 Nc6 4. d4 exd4 5. Nxd4 g6 6. Nxc6 bxc6 7. g3 Bg7 8. Bg2 Bd7 9. O-O Ne7 10. Qd2 O-O
1969 DSV-Turnier – Round 8 – Golz, Werner – 1-0 – Vogt, Lothar – G38
1. c4 e5 2. Nc3 Nc6 3. Nf3 d6 4. d4 exd4 5. Nxd4 g6 6. g3 Bg7 7. Nxc6 bxc6 8. Bg2 Ne7 9. O-O O-O 10. Qa4 Bd7

A27b — Three Knights (1925)
1.c4 e5 2.Nc3 Nc6 3.Nf3 d6
Les coups candidats
4.d4 — 55.9% (624 parties)
Ambassadeurs : Ruckschloss, Karol (7x), Hausner, Ivan (4x), Bak, Istvan (3x), Marzano, Carlo (3x), Cafferty, Bernard (3x), Holfelder, Hans-Joachim (3x), Frindt, Kornel (3x), Terpugov, Evgeny (2x)
4.g3 — 31.9% (356 parties)
Ambassadeurs : Rebizzo, Cayetano (2x), Soules, Jorge (2x), Brodie, Hugh (2x), Garcia , Efren (2x), Nguyen Thanh An (2x), Villing, Dieter (2x), Winkelbauer, Manuela (2x), Grachev, Maxim (2x)
4.e3 — 5.4% (60 parties)
Ambassadeurs : Dikarev, Boris (1x), Sakhanovich, Yuri V (1x), Laco, Giuseppe (1x), Paoli, Enrico (1x), Simon, Ralf-Axel (1x), Treppner, Gerd (1x), Coleman, Guy (1x), Koopman, Colin (1x)
4.d3 — 4.1% (46 parties)
Ambassadeurs : Olle, Peter (1x), Izsak, Gyula (1x), Fourn, Pierre-Andre (1x), Grammatico, Eric (1x), Kandetzki, Christoph (1x), Schulze, Mirko (1x), Sen Gupta, D. (1x), Mihailovs, Jurijs (1x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 4.d4 4.g3 4.e3 4.d3
<1800 97 38% 41% 5% 8%
1800-2200 516 56% 34% 4% 3%
2200-2600 247 74% 20% 4% 2%
Évolution par décennie (% des parties)
Décennie N parties 4.d4 4.g3 4.e3 4.d3
1950s 11 64% 36% — —
1960s 23 83% 9% 9% —
1970s 50 86% 12% — —
1980s 57 67% 32% 2% —
1990s 253 55% 28% 8% 7%
2000s 366 49% 37% 5% 5%
2010s 303 53% 35% 6% 4%
2020s 53 70% 26% 4% —
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
4.d4 53% 70% ▲ +16.7%
4.g3 35% 26% ▼ -8.2%
4.e3 6% 4% ▼ -1.8%
4.d3 4% 0% ▼ -3.6%
Parties historiques
4.d4 — 55.9% (624 parties)
1951 — Lehmann, Heinz vs Pfeiffer, Gerhard — 1-0 — FRG-ch Duesseldorf GER
1952 — Veltmander, Iogannes vs Terpugov, Evgeny — 1-0 — Riga LAT
1952 — Alexander Tadala vs Terpugov, Evgeny — 1-0 — Riga LAT
1956 — Ojanen, Kaarle S vs Vestol, Aage — 1/2-1/2 — Moskou olm
1957 — Anay Barche vs Koberl, Ferenc — 1-0 — Budapest HUN
4.g3 — 31.9% (356 parties)
1952 — Rebizzo, Cayetano vs Soules, Jorge — 0-1 — Rosario ARG
1952 — Rebizzo, Cayetano vs Soules, Jorge — 0-1 — Rosario ARG
1954 — Sarosy, Zoltan L vs Avery, Peter — 0-1 — Toronto CAN
1958 — Rapaka Samuel Paul vs Bernstein, Sidney — 1-0 — New York, NY USA
1964 — Maedler, Juergen, Dr. vs Radovici, Corvin — 1/2-1/2 — Sinaia
4.e3 — 5.4% (60 parties)
1968 — Laco, Giuseppe vs Paoli, Enrico — 0-1 — ITA-ch Milan ITA
1969 — Dikarev, Boris vs Sakhanovich, Yuri V — 1/2-1/2 — ?
1983 — Simon, Ralf-Axel vs Treppner, Gerd — 0-1 — GER
1990 — Arcusa, Michel vs Normand, Vincent — 1-0 — Provence
1993 — Lein, Josef vs Kotz, Wolfram — 1-0 — Schloss Schney
4.d3 — 4.1% (46 parties)
1994 — Schwarz, Frank vs Helbig, Mark — 0-1 — GER
1994 — Fischer, Hans vs Wallis, Toni — 1-0 — Mengen
1995 — Kroepsch, M. vs Havemann, M. — 1-0 — GER
1995 — De Jong, Ben vs Thissen, Thomas — 0-1 — Hengelo NED
1995 — Guburov, Elbrus vs Kijashko, I. — 1-0 — Armavir

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