A13v — English: Neo-Catalan Accepted, 5.Qa4+ Nbd7 6.O-O

1.c4 e6 2.Nf3 d5 3.g3 Nf6 4.Bg2 dxc4 5.Qa4+ Nbd7 6.O-O * ○ Trait aux Blancs

Ouverture — Centre mobile

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Plans. Qxc4 (Centraliser la dame — 84 % des parties) ; O-O (Mettre le roi en sécurité, connecter les tours — 15 % des parties).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Plans. ...a6 (Préparer expansion aile dame — 52 % des parties) ; ...c5 (Frapper le centre adverse — 43 % des parties).

Avantages

Faiblesses

Diagonale active

Plans

Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	● c4, ● c7
Pions isolés	—	—
Arriérés	—	—
Chaînes	● f2→g3, h2→g3	● f7→e6
Passés	—	—
Majorité	—	● aile dame 4v2

Cases

	♔ Blancs	♚ Noirs
Cases fortes	—	● c5 (2v0), ● d5 (2v0)
Cases faibles	—	—
Centre	● d4 (1v0)	● d5 (2v0), ● e4 (1v0)

Colonnes et diagonales

	♔ Blancs	♚ Noirs
Semi-ouvertes	● c	● d

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 0)
Bg2	● Bg2 Ok (mob. 2)
Bc8		● Bc8 Non développé (mob. 0)
Bf8		● Bf8 Non développé (mob. 5)
Paire de fous	● Oui	● Oui
Clouages	—	● knight d7
Non développées	4 (● b1, ● c1, ● a1, ● h1)	4 (● 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	● d2-d3	● …c4-c3

├── A13w - 6.Qxc4 - Neo-Catalan Accepted (1941) [+0.23] · 160 parties (dont 67 ici)

│ ├── A13w - 6…a6 - Neo-Catalan Accepted (1939) [+0.25] · 61 parties

│ └── A13w - 6…c5 - Neo-Catalan Accepted (1948) [+0.25] · 32 parties

└── A13v - 6.O-O - Neo-Catalan Accepted (1925) [-0.15] · 42 parties

A13v — Neo-Catalan Accepted (1925)

1.c4 e6 2.Nf3 d5 3.g3 Nf6 4.Bg2 dxc4 5.Qa4+ Nbd7

Les coups candidats

6.Qxc4 — 83.6% (2975 parties) →

Ambassadeurs : Sveshnikov, Evgeny (27x), Vaganian, Rafael A (15x), Szekely, Peter (11x), Luther, Thomas (11x), Taimanov, Mark (10x), Tal, Mikhail (9x), Schneider, Lars-Ake (9x), Unzicker, Ferdinand, Dr. (9x)

6.O-O — 15.3% (544 parties) →

Ambassadeurs : Zak, Uriel (3x), Kucera, Petr (3x), Olafsson, Fridrik (3x), Sveshnikov, Evgeny (3x), Aadhitha Karikalan (2x), Parak, Frantisek (2x), Lombardy, William J (2x), Debarnot, Roberto (2x)

6.Ne5 — 0.7% (26 parties)

Ambassadeurs : Hernandez Noa, Rodney (2x), Sisniega Campbell, Marcel (1x), Blocker, Calvin (1x), Szabo, Laszlo (1x), Langeweg, Kick (1x), Nilsson, Nils S (1x), Rodgaard, John (1x), Quinteros, Miguel A. (1x)

6.Nc3 — 0.3% (11 parties)

Ambassadeurs : Muhtarov, Leonid (1x), Belic, Milovan (1x), Grimm, Sascha (1x), Gruen, Gerd-Peter (1x), Balikowa Mark (1x), Wenger, Joseph (1x), Guenthner, Oliver (1x), Behling, Robert (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	6.Qxc4	6.O-O	6.Ne5	6.Nc3
<1800	64	83%	12%	3%	—
1800-2200	759	83%	15%	1%	1%
2200-2600	2395	83%	16%	1%	0%
2600+	156	97%	3%	—	—

Évolution par décennie (% des parties)

Décennie	N parties	6.Qxc4	6.O-O	6.Ne5	6.Nc3
1950s	28	71%	29%	—	—
1960s	32	69%	31%	—	—
1970s	135	78%	21%	1%	—
1980s	295	80%	19%	1%	—
1990s	559	82%	17%	0%	1%
2000s	505	75%	22%	2%	1%
2010s	1216	84%	15%	1%	0%
2020s	790	93%	7%	0%	0%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
6.Qxc4	84%	93%	▲ +9.2%
6.O-O	15%	7%	▼ -8.4%
6.Ne5	1%	0%	▼ -0.6%
6.Nc3	0%	0%	-0.1%

Joueurs célèbres

Champions du monde dans cette position

Tal, Mikhail — 10 parties
Karpov, Anatoly — 4 parties
Hou, Yifan — 4 parties
Botvinnik, Mikhail — 3 parties
Anand, Viswanathan — 3 parties
Ding, Liren — 3 parties
Carlsen, Magnus — 3 parties
Ju, Wenjun — 2 parties
Smyslov, Vladimir — 1 partie
Kramnik, Vladimir — 1 partie

Parties historiques

6.Qxc4 — 83.6% (2975 parties)

1950 — Karff, Mona M vs Larsen, Ingrid — 1-0 — Moscow RUS
1951 — Smyslov, Vasily vs Taimanov, Mark — 1-0 — Moscow RUS
1952 — Garcia Vera, Romeo vs Casas Perea, Fernando — 1/2-1/2 — Buenos Aires ARG
1952 — Sandor, Bela vs Szily, Jozsef — 0-1 — Hungary ch
1953 — Heemsoth, Hermann vs Eisinger, Max Jr — 0-1 — Berlin West

6.O-O — 15.3% (544 parties)

1951 — Anay Barche vs Benko, Pal — 1/2-1/2 — Marianske Lazne zt
1952 — Rojahn, Ernst vs Pogats, Jozsef Jr. — 0-1 — Helsinki FIN
1955 — Parak, Frantisek vs Betak Miroslav — 1/2-1/2 — Prague CZE
1956 — Parak, Frantisek vs Uhlmann, Wolfgang — 1-0 — Marianske Lazne/Praha
1956 — Larsen, Bent Ravn vs Prins, Lodewijk — 1-0 — Moskou olm

6.Ne5 — 0.7% (26 parties)

1973 — Szabo, Laszlo vs Langeweg, Kick — 1/2-1/2 — Amsterdam NED
1984 — Sisniega Campbell, Marcel vs Blocker, Calvin — 1-0 — Nassau Int Syosset
1984 — Quinteros, Miguel A. vs Jarecki, John — 1-0 — New York, NY USA
1987 — Nilsson, Nils S vs Rodgaard, John — 0-1 — Copenhagen DEN
1996 — Collas, Didier vs Lukacs, Peter — 1/2-1/2 — Budapest HUN

6.Nc3 — 0.3% (11 parties)

1994 — Muhtarov, Leonid vs Belic, Milovan — 0-1 — Djakovo
1995 — Grimm, Sascha vs Gruen, Gerd-Peter — 0-1 — Enger Spenge-Godesbe
1997 — Balikowa Mark vs Wenger, Joseph — 1/2-1/2 — IECC
2004 — Guenthner, Oliver vs Behling, Robert — 1-0 — GER
2005 — Suajibi, Dritan vs Stamenkov, Vanco — 0-1 — Struga (Macedonia)

1925 Moscow – Round 1 – Zubarev, Nikolay – 1/2-1/2 – Tartakower, Savielly – G129