D87g — Gruenfeld: Classical Exchange, 9.O-O Nc6 10.Be3

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 O-O 8.Ne2 c5 9.O-O Nc6 10.Be3 * ● Trait aux Noirs

Ouverture — Centre semi-ouvert

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Plan principal. Exploiter la case forte f4….

Atouts. Les Blancs s'appuient sur une majorité de pions à l'centre (2 contre 1), les cases fortes f4 et d5, des fous actifs en e3 et c4, la paire de fous et la colonne semi-ouverte b.

Côté adverse. Le fou enfermé en c8 et une pièce en prise (le pion en c5).

En contrepartie. Le pion isolé a2.

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Plan principal. Jeu au centre (rupture e7-e6).

Atouts. Les Noirs s'appuient sur une majorité de pions à l'aile_dame (3 contre 2), un fou actif en g7, la paire de fous et la colonne semi-ouverte d.

Côté adverse. Le pion isolé a2.

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

Plans. ...Na5 (Attaquer Bc4) ; ...e6 (Rupture) ; ...e5 (Rupture).

Avantages

Faiblesses adverses

Diagonale active

Plans

Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	● a2	—
Arriérés	—	—
Chaînes	● c3→d4	● f7→g6, h7→g6
Passés	—	—
Majorité	● centre 2v1	● aile_dame 3v2

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● f4 (2v0), ● d5 (2v1)	—
Cases faibles	—	—
Centre	● d5 (2v1)	● e5 (2v1)

Colonnes et diagonales

	♔ Blancs	♚ Noirs
Semi-ouvertes	● b	● d

Pièces

	♔ Blancs	♚ Noirs
Be3	● Be3 Actif (mob. 5)
Bc4	● Bc4 Actif (mob. 7)
Bg7		● Bg7 Actif (mob. 5)
Bc8		● Bc8 Non développé (mob. 5)
Paire de fous	● Oui	● Oui
Clouages	—	● pawn f7
Non développées	1 (● a1)	2 (● c8, ● a8)

Sécurité du roi

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

Thèmes

	♔ Blancs	♚ Noirs
Phase	Ouverture
Centre	semi-ouvert
Ruptures	● d4-d5, ● e4-e5, ● f2-f3	● …e7-e6, ● …e7-e5, ● …f7-f6, ● …f7-f5

Partie
10. London Classic 2018 – Round 2.1 – Nakamura, Hikaru – 1/2-1/2 – Vachier-Lagrave, Maxime – G17 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 Nc6 9. Be3 O-O 10. O-O b6
36. Olympiad 2004 – Round 13 – Graf, Adrian – 0-1 – Navara, David – G466 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 Nc6 9. Be3 O-O 10. O-O Bd7
40. Olympiad Open 2012 – Round 10.2 – Peralta, Fernando – 1/2-1/2 – Grischuk, Alexander – G552 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 Nc6 9. Be3 O-O 10. O-O b6
40. Olympiad Open 2012 – Round 6.18 – Peralta, Fernando – 1-0 – Ftacnik, Lubomir – G358 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 Nc6 9. Be3 O-O 10. O-O b6
6. Norway Chess 2018 – Round 4.3 – Karjakin, Sergey – 1-0 – Vachier-Lagrave, Maxime – G18 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 Nc6 9. Be3 O-O 10. O-O b6
6. Tal Memorial 2011 – Round 6 – Carlsen, Magnus – 1/2-1/2 – Svidler, Peter – G22 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 Nc6 9. Be3 O-O 10. O-O b6
7. Sinquefield Cup 2019 – Round 4.5 – Giri, Anish – 1/2-1/2 – Vachier-Lagrave, Maxime – G23 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 Nc6 9. Be3 O-O 10. O-O b6
7. Sinquefield Cup 2019 – Round 8.3 – Karjakin, Sergey – 1-0 – Vachier-Lagrave, Maxime – G45 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 Nc6 9. Be3 O-O 10. O-O b6
83. Tata Steel Masters 2021 – Round 4.3 – Duda, Jacob – 1/2-1/2 – Giri, Anish – G27 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 O-O 9. O-O Nc6 10. Be3 b6
85. Tata Steel Masters 2023 – Round 1.6 – Praggnanandhaa R – 1/2-1/2 – Erigaisi Arjun – G6 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 O-O 9. O-O Nc6 10. Be3 b6
CCT Final Playoff 2023 – Round 7.1 – Abdusattorov, Nodirbek – 1/2-1/2 – Vachier-Lagrave, Maxime – G64 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 O-O 9. O-O Nc6 10. Be3 b6
Corus A 2007 – Round 1 – Shirov, Alexei – 1/2-1/2 – Svidler, Peter – G4 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 Nc6 9. Be3 O-O 10. O-O Bd7
Corus A 2007 – Round 12 – Van Wely, Loek – 1-0 – Svidler, Peter – G76 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 Nc6 9. Be3 O-O 10. O-O Bd7
Corus A 2007 – Round 2 – Carlsen, Magnus – 0-1 – Navara, David – G9 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 Nc6 9. Be3 O-O 10. O-O Bd7
Dortmund 1998 – Round 7 – Jussupow, Artur – 1/2-1/2 – Svidler, Peter – G25 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 O-O 8. Be3 c5 9. Ne2 Nc6 10. O-O Bd7
FIDE Candidates 2020 – Round 4.1 – Caruana, Fabiano – 1/2-1/2 – Nepomniachtchi, Ian – G13 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 O-O 9. O-O Nc6 10. Be3 b6
FIDE Candidates 2020 – Round 6.4 – Wang, Hao(ZJWZ) – 1/2-1/2 – Vachier-Lagrave, Maxime – G24 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 O-O 9. O-O Nc6 10. Be3 b6
FIDE Candidates 2022 – Round 3.1 – Ding, Liren – 1/2-1/2 – Rapport, Richard – G9 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 Nc6 9. Be3 O-O 10. O-O b6
FIDE Grand Swiss 2025 – Round 1 – Matlakov Maxim – 1/2-1/2 – Tabatabaei M. Amin – G31 1. Nf3 d5 2. g3 Nf6 3. Bg2 c5 4. O-O e6 5. d4 cxd4 6. Nxd4 e5 7. Nb3 Be6 8. c4 Nc6 9. cxd5 Nxd5 10. N1d2 Be7
FIDE World Cup 2025 – Round R4 Classical 2 – Shant Sargsyan – 1/2-1/2 – Svane – G552 1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. O-O Bg7 5. h3 Nf6 6. e5 Nd5 7. Re1 O-O 8. Nc3 Nc7 9. Bxc6 dxc6 10. d3 Be6
FIDE World Rapid 2014 – Round 12.28 – Korobov, Anton – 1/2-1/2 – Salgado Lopez, Ivan – G270 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 O-O 9. O-O Nc6 10. Be3 e6
FIDE World Rapid 2014 – Round 4.5 – Bacrot, Etienne – 0-1 – Vachier-Lagrave, Maxime – G33 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 Nc6 9. Be3 O-O 10. O-O b6
Hoogovens 1979 – Round 7 – Polugaevsky, Lev – 1/2-1/2 – Miles, Anthony J – G17 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 O-O 9. O-O Nc6 10. Be3 b6
Hoogovens 1999 – Round 8 – Kramnik, Vladimir – 1/2-1/2 – Sokolov, Ivan. – G45 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 O-O 8. Ne2 c5 9. O-O Nc6 10. Be3 Bd7
Interpolis 1985 – Round 1 – Polugaevsky, Lev – 1-0 – Romanishin, Oleg M – G10 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 O-O 9. O-O Nc6 10. Be3 Bd7
Jakarta / Yogya / Bali 1983 – Round 15 – Portisch, Lajos – 1-0 – Schmidt, Waldemar – G45 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 Nc6 9. Be3 O-O 10. O-O b6
Olympiad 2002 – Round 7 – Georgiev, Vladimir – 0-1 – Ftacnik, Lubomir – G224 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 O-O 9. O-O Nc6 10. Be3 Bd7
Pearl Spring 2008 – Round 5 – Topalov, Veselin – 1-0 – Svidler, Peter – G12 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 Nc6 9. Be3 O-O 10. O-O Bd7
Saint Louis Blitz 2022 – Round 4.3 – Nepomniachtchi, Ian – 1/2-1/2 – Vachier-Lagrave, Maxime – G18 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 O-O 9. O-O Nc6 10. Be3 b6
Saint Louis Rapid 2022 – Round 2.2 – Nepomniachtchi, Ian – 1/2-1/2 – Vachier-Lagrave, Maxime – G7 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 O-O 9. O-O Nc6 10. Be3 b6
Tata Steel India Blitz 2022 – Round 15.2 – Gukesh D – 1-0 – Saini Vidit – G69 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 O-O 9. Be3 Nc6 10. O-O e6
Tata Steel India Rapid 2019 – Round 2.1 – Harikrishna, Pentala – 1/2-1/2 – Ding, Liren – G6 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 Nc6 9. Be3 O-O 10. O-O b6
Tata Steel Masters 2024 - Round 13 - Praggnanandhaa, R - 1/2-1/2 - Firouzja, Alireza 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 O-O 9. O-O Nc6 10. Be3 e6
TCh-RUS 2005 – Round 10 – Skatchkov, Pavel – 0-1 – Timofeev, Artyom – G164 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 O-O 9. O-O Nc6 10. Be3 Bd7
TCh-RUS 2008 – Round 8 – Vitiugov, Nikita – 0-1 – Timofeev, Artyom – G214 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 Nc6 9. Be3 O-O 10. O-O Bd7
USA Ch 2022 – Round 2.2 – Swiercz, Dariusz – 1/2-1/2 – Shankland, Sam – G9 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 O-O 8. Ne2 c5 9. O-O Nc6 10. Be3 e6
Wijk aan Zee NED, Tata Steel GpA 2015 – Round 9.5 – So, Wesley – 1/2-1/2 – Vachier-Lagrave, Maxime – G20 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 Nc6 9. Be3 O-O 10. O-O b6
World Blitz 2016 – Round 11.4 – Salem, A.R. Saleh – 0-1 – Vachier-Lagrave, Maxime – G450 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 Nc6 9. Be3 O-O 10. O-O b6
World Blitz 2019 – Round 12.25 – Adhiban, B. – 0-1 – Aditya Tari – G805 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 Nc6 9. Be3 O-O 10. O-O b6
World Blitz 2023 – Round 12.46 – Ponomariov, Ruslan – 1-0 – Madaminov, Mukhiddin – G705 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 Nc6 9. Be3 O-O 10. O-O b6
World Championship 2010 – Round 10 – Topalov, Veselin – 1/2-1/2 – Anand, Viswanathan – G6 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 Nc6 9. Be3 O-O 10. O-O b6
World Championship 2010 – Round 10 – Topalov, Veselin – 1/2-1/2 – Anand, Viswanathan – G7 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 O-O 8. Ne2 c5 9. Be3 Nc6 10. O-O b6
World Rapid 2016 – Round 3.4 – Salem, A.R. Saleh – 0-1 – Grischuk, Alexander – G118 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 Nc6 9. Be3 O-O 10. O-O b6
World Rapid 2019 – Round 8.49 – Korobov, Anton – 1-0 – Potkin, Vladimir – G532 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 O-O 8. Ne2 c5 9. O-O Nc6 10. Be3 b6
XXI SuperGM 2004 – Round 11 – Shirov, Alexei – 1/2-1/2 – Vallejo Pons, Francisco – G31 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 Nc6 9. Be3 O-O 10. O-O Bd7

D87g — Classical Exchange

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 O-O 8.Ne2 c5 9.O-O Nc6 10.Be3

Les coups candidats

10…Qc7 — 31.5% (5051 parties) →

Ambassadeurs : Pribyl, Josef (25x), Packroff, Hermann (24x), Ylönen, Olli (22x), Hlavac, Rudolf (18x), Ederer, Karel (18x), Adorjan, Andras (16x), Tleptsok, Ruslan (16x), Boll, Peter (15x)

10…Bg4 — 28.9% (4633 parties) →

Ambassadeurs : Husemann, Andreas (25x), Rawlings, Alan J C (22x), Roques, Pascal (22x), Lahdenmäki, Leo (21x), Naumkin, Igor (20x), Muñiz Pardiño, Alberto (17x), Kudrin, Sergey (16x), Ernst, Thomas (15x)

10…cxd4 — 11.2% (1802 parties) →

Ambassadeurs : Sychov, Aleksandr Vitalievi (24x), Ederer, Karel (13x), Schmidt, Wlodzimierz (12x), Daamen, Ferry (12x), Krueger, Hilmar (12x), Gligoric, Svetozar (11x), Knaak, Rainer (10x), Kirov, Nino (9x)

10…Na5 — 10.7% (1717 parties) →

Ambassadeurs : Laghetti, Gaetano (20x), Banas, Jan (19x), Bobel, Philippe (14x), Korobov, Anton (10x), Jansa, Vlastimil (10x), Bernal Varela, Nelson (9x), ? (7x), Ivanovic, Zeljko (7x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	10…Qc7	10…Bg4	10…cxd4	10…Na5
<1800	354	28%	23%	20%	12%
1800-2200	5632	33%	29%	11%	11%
2200-2600	6621	29%	30%	6%	11%
2600+	430	17%	29%	3%	17%

Évolution par décennie (% des parties)

Décennie	N parties	10…Qc7	10…Bg4	10…cxd4	10…Na5
1900s	1	—	—	100%	—
1930s	1	100%	—	—	—
1940s	12	—	—	92%	—
1950s	47	30%	4%	40%	26%
1960s	135	57%	1%	29%	13%
1970s	549	59%	2%	27%	10%
1980s	1157	39%	32%	19%	6%
1990s	2253	36%	37%	17%	6%
2000s	4005	26%	36%	12%	10%
2010s	6201	34%	26%	7%	14%
2020s	1697	13%	22%	3%	9%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
10…Qc7	34%	13%	▼ -21.9%
10…Bg4	26%	22%	▼ -3.9%
10…cxd4	7%	3%	▼ -4.1%
10…Na5	14%	9%	▼ -4.9%

Joueurs célèbres

Champions du monde dans cette position

Kasparov, Garry — 10 parties
Carlsen, Magnus — 10 parties
Karpov, Anatoly — 7 parties
Anand, Viswanathan — 7 parties
Kramnik, Vladimir — 6 parties
Gukesh D — 6 parties
Ding, Liren — 3 parties
Smyslov, Vladimir — 2 parties
Tal, Mikhail — 2 parties
Botvinnik, Mikhail — 1 partie
Karpov, Aleksandr — 1 partie
Ju, Wenjun — 1 partie

Parties historiques

10…Qc7 — 31.5% (5051 parties)

1939 — Bondarevsky, Igor vs Levenfish, Grigory — 0-1 — Leningrad ch-URS
1951 — Sherwin, James T vs Kashdan, Isaac — 0-1 — Forth Worth
1952 — Konstantinopolsky, Alexander vs Shamkovich, Leonid — 0-1 — USSR ch-02 5255
1953 — Lewkowitz, Alfredo vs Pereyra Puebla, Manuel Miguel — 1-0 — ?
1954 — Livshin, Iosif vs Nikitin, Aleksander S — 1-0 — Moscow RUS

10…Bg4 — 28.9% (4633 parties)

1950 — Podlone Charles vs Zalys, Ignas — 1-0 — Montreal CAN
1955 — Spassky, Boris V. vs Korchnoi, Viktor — 1-0 — Moscow RUS
1967 — Petersen, Finn vs Kristinsson, Jon — 1-0 — Zonal Halle GER
1977 — Foisor, Ovidiu-Doru vs Tonoli, Walter — 1/2-1/2 — Groningen NED
1978 — Pedersen, Svend vs Milovanovic, Dr. Momir — 1-0 — EU/MSM/II corr

10…cxd4 — 11.2% (1802 parties)

1905 — Ruffne Toth, Andrea vs Vallifuoco, Gc — 1-0 — Naples ITA
1940 — Bondarevsky, Igor vs Pogrebissky, Iosif — 1-0 — Kiev UKR
1944 — Tolush, Alexander V vs Boleslavsky, Isaac — 1-0 — Kiev UKR
1944 — Bird, Andrew vs Hislop, Allan Thomas — 1-0 — ENG/S ch corr
1946 — Marini Speca, Gioia vs Beretta, Alberto Luigi — 1-0 — Buenos Aires ch-ARG

10…Na5 — 10.7% (1717 parties)

1950 — Gligorić, Svetozar vs Skold, Kristian — 1-0 — Dubrovnik CRO
1951 — Kluger, Gyula vs Sallay, Roland — 1-0 — Budapest HUN
1955 — Joyner, Lionel vs Jursevskis Miervaldis — 1/2-1/2 — Ottawa CAN
1956 — Bannik, Anatolij vs Simagin, Vladimir — 0-1 — Leningrad RUS
1956 — Bannik, Anatolij vs Simagin, Vladimir — 0-1 — Leningrad ch-URS

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