A20q — English: King’s, 2.g3 Nc6 3.Bg2

1.c4 e5 2.g3 Nc6 3.Bg2 * ● Trait aux Noirs

Ouverture — Centre semi-ouvert

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Avantages : case forte d5, Bg2 actif, paire de fous.
Faiblesses adverses : Bc8 enfermé, Bf8 enfermé, roi noir au centre.
Problèmes : roi au centre, Bc1 enfermé, 5 pièces non développées (B1, G1, C1, A1, H1).
Plans :
● O-O — Mettre le roi en sécurité, connecter les tours
● Nc3 — Développer Nb1
● Nf3 — Développer Ng1
● d3 — Libérer Bc1

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Avantages : case forte b4, case forte d4, paire de fous.
Faiblesses adverses : Bc1 enfermé, roi blanc au centre.
Problèmes : roi au centre, Bc8 enfermé, Bf8 enfermé, 5 pièces non développées (G8, C8, F8, A8, H8).
Plans :
● O-O — Mettre le roi en sécurité, connecter les tours
● ...d6 — Libérer Bc8
● ...Nf6 — Développer Ng8
● ...Be7 — Développer Bf8
● ...d5 — Rupture

Avantages

Faiblesses adverses

Diagonale active

Plans

Structure de pions

A20q — King’s

1.c4 e5 2.g3 Nc6 3.Bg2

Eval: [+0.30]

Les coups candidats

3…g6 — 40.7% (4439 parties)

Ambassadeurs : Pribyl, Josef (19x), Sehner, Norbert (13x), Serper, Grigory (13x), Cekro, Ekrem (13x), Foisor, Cristina-Adela (13x), Sher, Miron (12x), Vaulin, Alexander P. (11x), Korchnoi, Viktor (10x)

3…f5 — 20.1% (2192 parties)

Ambassadeurs : Spraggett, Kevin (11x), Vaulin, Alexander P. (9x), Serper, Grigory (8x), Sher, Miron (8x), Lutton, E Josiah (8x), Kurajica, Bojan (8x), Vogiatzis, Dimitrios (7x), De Smet, Karl (7x)

3…Nf6 — 15.6% (1696 parties) →

Ambassadeurs : Popov, Vladimir Valentinovich (9x), Korneev, Oleg (9x), Polak, Tomas (8x), Foisor, Cristina-Adela (6x), Malewicz, Frank (6x), Brissman, Anders (6x), Tomescu, Victor-Alexandru (5x), Mertanen, Janne (5x)

3…Bc5 — 13.4% (1457 parties)

Ambassadeurs : Larkin, Vladyslav (10x), Kantans, Toms (9x), Christiansen, Johan-Sebastian (9x), Epishin, Vladimir (7x), Belenkaya, Dina (7x), Kovacevic, Blazimir (7x), Korneev, Oleg (7x), Savchenko, Stanislav (6x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	3…g6	3…f5	3…Nf6	3…Bc5
<1800	356	23%	27%	25%	14%
1800-2200	4005	36%	24%	17%	12%
2200-2600	5006	47%	18%	12%	15%
2600+	192	51%	15%	8%	19%

Évolution par décennie (% des parties)

Décennie	N parties	3…g6	3…f5	3…Nf6	3…Bc5
1910s	2	50%	50%	—	—
1920s	4	—	25%	75%	—
1930s	5	20%	20%	60%	—
1940s	4	—	25%	—	25%
1950s	13	54%	15%	8%	15%
1960s	93	62%	5%	5%	2%
1970s	110	65%	15%	5%	3%
1980s	400	64%	12%	8%	2%
1990s	1578	56%	18%	11%	3%
2000s	3053	45%	20%	15%	8%
2010s	4617	32%	22%	19%	19%
2020s	1015	31%	21%	14%	26%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
3…g6	32%	31%	▼ -0.9%
3…f5	22%	21%	▼ -1.0%
3…Nf6	19%	14%	▼ -5.2%
3…Bc5	19%	26%	▲ +6.9%

Joueurs célèbres

Champions du monde dans cette position

Tal, Mikhail — 5 parties
Kasparov, Garry — 5 parties
Gukesh D — 5 parties
Kramnik, Vladimir — 2 parties
Anand, Viswanathan — 2 parties
Karpov, Aleksandr — 2 parties
Karpov, Anatoly — 2 parties
Ding, Liren — 2 parties
Euwe, Max — 1 partie
Smyslov, Vladimir — 1 partie
Carlsen, Magnus — 1 partie

Parties historiques

3…g6 — 40.7% (4439 parties)

1912 — Carls, Carl vs Suechting, Hugo — 1/2-1/2 — Hamburg GER
1939 — Jaeger, Willy vs Heinicke, Herbert — 1/2-1/2 — Bad Elster
1954 — Nuesken Fritz vs Kahn, Manfred — 1/2-1/2 — Zittau
1954 — Carls, Carl vs Heinicke, Herbert — 1-0 — Bremen GER
1957 — Furman, Slavomir vs Bannik, Anatolij — 1-0 — Leningrad RUS

3…f5 — 20.1% (2192 parties)

1912 — Carls, Carl vs Suechting, Hugo — 0-1 — Hamburg GER
1923 — Barker, W. vs Pratten, Wilfred Henry — 1/2-1/2 — Southsea
1939 — Roess, L. vs Koch, Berthold — 1/2-1/2 — Bad Elster
1944 — Zita, Frantisek vs Florian, Jaromir — 1-0 — Olomouc Olomouc CZE
1954 — Barcza, Gedeon vs Kluger, Gyula — 1-0 — Hungary ch

3…Nf6 — 15.6% (1696 parties)

1925 — Koltanowski, George vs Colle, Edgar — 1/2-1/2 — Gand
1925 — Koltanowski, George vs Colle, Edgar — 1/2-1/2 — Brussels BEL
1926 — Euwe, Max vs Davidson Gallego, Jorge — 1/2-1/2 — Amsterdam NED
1936 — Olexa, Vilem vs Barta, Jan — 1-0 — Podebrady CZE
1938 — Watson Charles Gilbert M vs Green, Max — 1-0 — Sydney AUS

3…Bc5 — 13.4% (1457 parties)

1942 — Seidman, Herbert vs Denker, Arnold S — 0-1 — New York, NY USA
1954 — Keck Berby, Luke vs Mechkarov, Ventzeslav — 1-0 — Halle GER
1959 — Jaeger, Walter vs Bialas, Wolfram — 1-0 — FRG-ch Nuerenberg GER
1962 — Kostiuchenko, Alexander vs Rostovtsev, Yuri — 1/2-1/2 — ?
1963 — Kostiuchenko, Alexander vs Kurass, Iskir — 1-0 — Kiev UKR

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	● f2→g3, h2→g3	—
Passés	—	—
Majorité	—	—

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● d5 (2v0)	● b4 (2v0), ● d4 (2v0)
Cases faibles	—	—
Centre	● d5 (2v0), ● e4 (1v0)	● d4 (2v0), ● e5 (1v0)

Colonnes et diagonales

♔ Blancs

♚ Noirs

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 0)
Bg2	● Bg2 Actif (mob. 6)
Bc8		● Bc8 Non développé (mob. 0)
Bf8		● Bf8 Non développé (mob. 5)
Paire de fous	● Oui	● Oui
Non développées	5 (b1, g1, 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	semi-ouvert
Ruptures	● c4-c5, ● d2-d3, ● e2-e3, ● f2-f3	● …d7-d6, ● …d7-d5, ● …e5-e4, ● …f7-f6, ● …f7-f5

Partie
1939 Bad Elster – Round 5 – Jaeger, Willy – 1/2-1/2 – Heinicke, Herbert – G14 1. c4 e5 2. g3 Nc6 3. Bg2 g6 4. e3 Bg7 5. Ne2 d6 6. d4 Nge7 7. Nbc3 O-O 8. O-O exd4 9. exd4 Nf5 10. d5 Ncd4
1944 Olomouc Olomouc CZE – Round 3 – Zita, Frantisek – 1-0 – Florian, Jaromir – G3 1. c4 e5 2. g3 Nc6 3. Bg2 f5 4. e4 fxe4 5. Nc3 Nf6 6. Nxe4 Nxe4 7. Bxe4 Qf6 8. Qf3 Bc5 9. Qxf6 gxf6 10. Ne2 d6
1958 AUS Ch – Round 2.12 – Tymoshenko, Peter – 1-0 – Purdy, Cecil J S – G7 1. c4 e5 2. g3 Nc6 3. Bg2 f5 4. d3 Nf6 5. Nf3 d5 6. cxd5 Nxd5 7. O-O Be7 8. Nc3 Nxc3 9. bxc3 Be6 10. Bb2 O-O
1959 FRG Ch Nuerenberg GER – Round 2 – Jaeger, Walter – 1-0 – Bialas, Wolfram – G4 1. c4 e5 2. g3 Nc6 3. Bg2 Bc5 4. Nc3 d6 5. e3 Nge7 6. Nge2 O-O 7. d4 exd4 8. exd4 Bb6 9. O-O Bg4 10. h3 Bxe2
1959 FRG Ch Nuerenberg GER – Round 4 – Jaeger, Walter – 1/2-1/2 – Troeger, Paul – G10 1. c4 e5 2. g3 Nc6 3. Bg2 d5 4. Nc3 Be6 5. d3 Nge7 6. Nf3 f6 7. O-O Qd7 8. Re1 g6 9. a3 Bg7 10. b4 O-O
1960 Leipzig olm prel – Round 3 – Angles d'Auriac, Bernard – 0-1 – Beni, Alfred – G109 1. g3 e5 2. c4 Nc6 3. Bg2 f5 4. d3 Nf6 5. Nf3 Be7 6. Nc3 d6 7. O-O O-O 8. e3 Qe8 9. Rb1 Nh5 10. Nd5 Bd8
1961 New York ch-USA – Round 2 – Benko, Pal – 0-1 – Bernstein, Sidney – G8 1. g3 e5 2. c4 Nc6 3. Bg2 Be7 4. Nc3 d6 5. e3 Be6 6. Nd5 Qd7 7. d4 exd4 8. exd4 Bf5 9. Ne2 Nf6 10. Nxe7 Qxe7
1963 CSR Ch – Round 16 – Ujtelky, Maximilian – 0-1 – Novak, Zbynek – G150 1. g3 e5 2. c4 Nc6 3. Bg2 g6 4. b3 Bg7 5. Bb2 Nge7 6. Nc3 d6 7. a3 Be6 8. Nd5 Qd7 9. e3 Rb8 10. Ne2 b5
1963 Kiev Avantgard Ch – Round ? – Kostiuchenko, Alexander – 1-0 – Kurass, Iskir – G1 1. c4 e5 2. g3 Nc6 3. Bg2 Bc5 4. e3 a6 5. Ne2 Nge7 6. Nbc3 d6 7. O-O O-O 8. d4 Ba7 9. b3 exd4 10. exd4 Bf5
1964 URS Ch sf Kishinev MDA – Round ? – Roizman, Abram Y – 1/2-1/2 – Kudriashov, Anatoli – G1 1. c4 e5 2. g3 Nc6 3. Bg2 g6 4. e4 d6 5. Ne2 Be6 6. d3 Qd7 7. Nbc3 Bg7 8. Nd5 Nce7 9. O-O c6 10. Ne3 h5
1965 New York ch-USA – Round 10 – Reshevsky, Samuel – 1/2-1/2 – Burger, Kim – G24 1. g3 e5 2. c4 Nc6 3. Bg2 g6 4. e3 Bg7 5. Ne2 d6 6. Nbc3 Nge7 7. O-O O-O 8. Rb1 Be6 9. Nd5 Qd7 10. Qa4 Nxd5
1966 Zinnowitz Zinnowitz GER – Round 9 – Gromek, Jozef – 1/2-1/2 – Liebert, Heinz – G28 1. c4 e5 2. g3 Nc6 3. Bg2 g6 4. e3 Bg7 5. Ne2 d6 6. Nbc3 f5 7. b3 Nf6 8. Bb2 O-O 9. Nd5 Nxd5 10. Bxd5+ Kh8
1968 Reykjavik – Round 1 – Olafsson, Fridrik – 1/2-1/2 – Taimanov, Mark – G3 1. c4 e5 2. g3 Nc6 3. Bg2 g6 4. b3 Bg7 5. Bb2 Nge7 6. Nc3 O-O 7. d3 d6 8. Qd2 Be6 9. Nd5 Qd7 10. f4 a5
1969 Uppsala Open – Round ? – Zwaig, Arne – 1-0 – Dahl Schutt, Frederik – G10 1. g3 e5 2. Bg2 Nc6 3. c4 Be7 4. Nc3 Nf6 5. d3 d6 6. Rb1 O-O 7. b4 a6 8. Bd2 Rb8 9. e3 Be6 10. b5 axb5
34. ECC Open 2018 – Round 1.6 – Vallejo Pons, Francisco – 1-0 – Rosenkilde, Alexander – G29 1. c4 e5 2. g3 Nc6 3. Bg2 Bc5 4. Nc3 a6 5. e3 Ba7 6. Nf3 Nf6 7. d4 exd4 8. Nxd4 Ne5 9. b3 O-O 10. O-O d6
40. Olympiad Open 2012 – Round 9.15 – Miezis, Normunds – 1/2-1/2 – Bruzon Batista, Lazaro – G494 1. c4 e5 2. g3 Nc6 3. Bg2 Bc5 4. Nc3 a6 5. e3 d6 6. Nge2 Ba7 7. a3 Nge7 8. d3 Bf5 9. h3 Qd7 10. b4 O-O
41. Olympiad Open 2014 – Round 6.26 – Mwali, Chitumbo – 0-1 – Anton Guijarro, David – G433 1. c4 e5 2. g3 Nc6 3. Bg2 Bc5 4. Nc3 d6 5. a3 a6 6. e3 Ba7 7. Nge2 h5 8. h4 Bg4 9. b3 Nge7 10. Bb2 Rb8
42. Olympiad 2016 – Round 8.21 – Iturrizaga Bonelli, Eduardo – 1/2-1/2 – Ferreira, Jorge Viterbo – G569 1. c4 e5 2. g3 Nc6 3. Bg2 Bc5 4. Nc3 a6 5. e3 d6 6. Nge2 Ba7 7. b3 Bf5 8. d3 Qd7 9. h3 h5 10. a3 Rb8
Cote d'Ivoire Blitz 2019 – Round 1.4 – Ding, Liren – 0-1 – Nepomniachtchi, Ian – G4 1. c4 e5 2. g3 Nc6 3. Bg2 h5 4. h3 Bc5 5. Nc3 d6 6. e3 Be6 7. b3 Nge7 8. Nge2 d5 9. d4 exd4 10. exd4 Bb4
FIDE World Cup 2015 – Round 1.1 – Safarli, Elmir – 1/2-1/2 – Balogh Urbina, Carlos Alfonso – G2 1. c4 e5 2. g3 Nc6 3. Bg2 Bc5 4. Nc3 a6 5. e3 d6 6. Nge2 Ba7 7. d4 Nge7 8. O-O exd4 9. Nxd4 Nxd4 10. exd4 O-O
FIDE World Cup 2019 – Round 2.2 – Anton Guijarro, David – 0-1 – Wei, Yi – G227 1. c4 e5 2. g3 Nc6 3. Bg2 h5 4. h3 d6 5. Nc3 h4 6. g4 f5 7. gxf5 Bxf5 8. d3 Nf6 9. Nf3 Be7 10. d4 Qd7
FIDE World Rapid Championship 2025 – Round 1 – Peyrer Konstantin – 0-1 – Giri Anish – G18 1. c4 e5 2. g3 Nc6 3. Bg2 Bc5 4. Nc3 d6 5. e3 Bb6 6. Nge2 h5 7. d4 h4 8. b4 a5 9. b5 h3 10. Bf3 Nce7
GCT Blitz Paris 2017 – Round 1.2 – Topalov, Veselin – 1-0 – Grischuk, Alexander – G2 1. c4 e5 2. g3 Nc6 3. Bg2 Bc5 4. Nc3 d6 5. e3 a6 6. Nge2 Ba7 7. b3 Nge7 8. Bb2 h5 9. h4 Bg4 10. d3 Qd7
GCT Rapid YourNextMove 2017 – Round 6.3 – Ivanchuk, Vasyl – 1-0 – Nepomniachtchi, Ian – G28 1. c4 e5 2. g3 Nc6 3. Bg2 h5 4. d3 h4 5. g4 h3 6. Be4 Nf6 7. Bg5 Be7 8. Bxf6 Bb4+ 9. Kf1 Qxf6 10. Nf3 Nd4
Interpolis 1993 – Round 1 – Serper, Grigory – 1/2-1/2 – Razuvaev, Yuri S – G2 1. c4 e5 2. g3 Nc6 3. Bg2 f5 4. e3 Nf6 5. Ne2 Be7 6. Nbc3 O-O 7. Nd5 Kh8 8. O-O Nxd5 9. cxd5 Nb4 10. d3 c6
Lugano Open 1982 – Round 1 – Korchnoi, Viktor – 1-0 – Bohm, Hans – G1 1. c4 Nc6 2. g3 e5 3. Bg2 g6 4. b3 Bg7 5. Bb2 Nge7 6. Nc3 O-O 7. e3 a6 8. Nge2 Rb8 9. d4 exd4 10. exd4 d6
World Blitz 2015 – Round 12.51 – Bezold, Michael – 1/2-1/2 – Ivanisevic, Ivan – G760 1. g3 e5 2. c4 Nc6 3. Bg2 Bc5 4. e3 d6 5. Ne2 a6 6. Nbc3 Ba7 7. d4 Nge7 8. O-O h5 9. h4 Bg4 10. d5 Nb8
World Blitz 2015 – Round 2.19 – Leko, Peter – 1/2-1/2 – Ivanisevic, Ivan – G87 1. c4 e5 2. g3 Nc6 3. Bg2 Bc5 4. Nc3 d6 5. e3 a6 6. Nge2 Ba7 7. d4 exd4 8. exd4 Nge7 9. h3 O-O 10. O-O Nf5
World Blitz 2018 – Round 12.4 – Le, Quang Liem – 0-1 – Nepomniachtchi, Ian – G721 1. c4 e5 2. g3 Nc6 3. Bg2 h5 4. h3 Bc5 5. Nc3 d6 6. e3 Be6 7. b3 Nge7 8. Nge2 d5 9. d4 exd4 10. exd4 Bb4
World Blitz 2018 – Round 8.36 – Zvjaginsev, Vadim – 0-1 – Demidov, Mikhail – G482 1. c4 e5 2. g3 Nc6 3. Bg2 Bc5 4. e3 a6 5. Ne2 d6 6. Nbc3 Ba7 7. h3 Nf6 8. d4 O-O 9. O-O exd4 10. Nxd4 Nxd4
World Blitz 2021 – Round 21.27 – Van Foreest, Jorden – 1-0 – Anton Guijarro, David – G1219 1. g3 e5 2. c4 Nc6 3. Bg2 Bc5 4. Nc3 a6 5. Nf3 d6 6. e3 Nf6 7. O-O O-O 8. h3 Ba7 9. b3 Re8 10. d3 Ne7
World Blitz 2023 – Round 20.33 – Iturrizaga Bonelli, Eduardo – 1-0 – Christiansen, Johan-Sebastian – G1143 1. c4 e5 2. g3 Nc6 3. Bg2 Bc5 4. Nc3 d6 5. Nf3 a6 6. e3 Ba7 7. O-O Bg4 8. h3 Bh5 9. g4 Bg6 10. d4 Nge7
World Blitz 2023 – Round 8.40 – Iturrizaga Bonelli, Eduardo – 0-1 – Zhalmakhanov, Ramazan – G474 1. c4 e5 2. g3 Nc6 3. Bg2 Bc5 4. Nc3 a6 5. Nf3 Ba7 6. O-O d6 7. e3 Nf6 8. d4 O-O 9. h3 Re8 10. dxe5 dxe5

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