C97f — Spanish: Closed, Chigorin, 12…Re8

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.c3 d6 9.h3 Na5 10.Bc2 c5 11.d4 Qc7 12.Nbd2 Re8 * ○ 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 un fou actif en c2 et la paire de fous.

Côté adverse. Les fous enfermés en e7 et c8.

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

Plans. Bg5 (Clouer Nf6).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Atouts. Les Noirs s'appuient sur la case forte c4, un avant-poste en c4 et la paire de fous.

Côté adverse. Le fou enfermé en c1.

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

Plans. ...Bg4 (Développer Bc8, clouer Nf3) ; ...c4 (Rupture) ; ...d5 (Rupture).

Avantages

Faiblesses adverses

Diagonale active

Plans

Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	● b2→c3, g2→h3, c3→d4	● a6→b5, d6→c5, d6→e5
Passés	—	—
Majorité	—	—

Cases

	♔ Blancs	♚ Noirs
Cases fortes	—	● c4 (2v1)
Cases faibles	—	—
Centre	● e4 (3v1), ● e5 (2v1)	—

Colonnes et diagonales

♔ Blancs

♚ Noirs

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 0)
Bc2	● Bc2 Actif (mob. 4)
Be7		● Be7 Enfermé (mob. 2)
Bc8		● Bc8 Non développé (mob. 6)
Paire de fous	● Oui	● Oui
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	● …c5-c4, ● …d6-d5

Partie
1909 BCF Ch 6th – Round 1 – Sergeant, Edward – 1/2-1/2 – Mackenzie, Arthur J – G4 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 Na5 9. Bc2 c5 10. d4 Qc7
1924 BCF Ch 17th – Round 10 – Atkins, Henry Ernest – 1/2-1/2 – Thomas, George Alan – G46 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 Na5 9. Bc2 c5 10. d4 Qc7
1925 Debrecen – Round 1 – Asztalos, Lajos – 1/2-1/2 – Havasi, Kornel – G61 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 Na5 9. Bc2 c5 10. d4 Qc7
1928 The Hague – Round 8 – Steiner, Lajos – 0-1 – Przepiorka, Dawid – G8 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O d6 6. Re1 b5 7. Bb3 Be7 8. c3 O-O 9. h3 Na5 10. Bc2 c5
1928 The Hague ol (Men) – Round 5 – Steiner, Endre – 1-0 – Sapira, Emmanuel – G33 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 d6 7. c3 Be7 8. Re1 Na5 9. Bc2 c5 10. d4 Qc7
1945 Moskou ch-URS – Round 1 – Boleslavsky, Isaac – 1-0 – Smyslov, Vladimir – G115 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5
1945 Moskou ch-URS – Round 1 – Boleslavsky, Isaac – 1/2-1/2 – Koblencs, Alexander – G114 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5
1954 Hastings5455 – Round 4 – Unzicker, Wolfgang – 1-0 – Donner, Jan-Hein – G17 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5
1954 Olympiad final A – Round 1 – Schmid, Leo – 1/2-1/2 – Donner, H. – G73 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5
1955 Buenos Aires CA – Round 8 – Reinhardt, Enrique – 0-1 – Donner, Jan-Hein – G57 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5
1955 Hoogovens – Round 1 – Bouwmeester, Hans – 1-0 – Donner, Jan-Hein – G11 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5
1955 Hoogovens – Round 3 – Bergsma, KM. – 0-1 – Donner, Jan-Hein – G22 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5
1955 Novi Sad – Round 12 – Djurasevic, Bozidar – 1/2-1/2 – Matanovic, Aleksandar – G98 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5
1955 Novi Sad – Round 17 – Milic, Borislav – 1-0 – Vospernik, Zdravko – G128 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Be7 7. Re1 O-O 8. c3 d6 9. h3 Na5 10. Bc2 c5
1955 URS Team Ch fin – Round 8 – Shamkovich, Leonid – 1-0 – Chukaev, Egor – G33 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5
1956 Candidats Tournament – Round 17 – Keres, Paul – 0-1 – Filip, Marius Liviu – G82 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5
1956 Hoogovens – Round 5 – Kramer, Hanspeter – 1/2-1/2 – Bouwmeester, Hans – G24 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Be7 7. Re1 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5
1956 Moscow olm fin-B – Round 4 – Dueckstein, Andreas – 1-0 – Boutteville, Cesar – G41 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5
1956 Moscow olm prel – Round 5 – Safvat, Younus – 0-1 – Cuellar Gacharna, Miguel – G159 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5
1956 Moscow olm prel – Round 7 – Siaperas, Triantafyllos – 0-1 – Balanel, Ion – G237 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5
1956 Olympiad, Moscow RUS – Round 1 – Matanovic, Anto – 1/2-1/2 – Bolbochan, J. – G4 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5
1957 Hoogovens – Round 1 – Toran Albero, Roman – 1-0 – Donner, Jan-Hein – G5 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5
1957 Mar del Plata – Round 12 – Ader Hausman, Walter – 0-1 – Najdorf, Miguel – G109 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Be7 7. Re1 O-O 8. c3 d6 9. h3 Na5 10. Bc2 c5
1957 Mar del Plata – Round 15 – Albert Seguer, Eladio – 1/2-1/2 – Mangini, Jose Henrique de Mello – G131 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. h3 O-O 9. c3 Na5 10. Bc2 c5
1957 Sao Paulo Sao Paulo BRA – Round 6 – Sanguineti, Raúl Carlos – 1-0 – Zacharias Guardia, Jose Bismarck – G13 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Be7 7. Re1 O-O 8. h3 d6 9. c3 Na5 10. Bc2 c5
1957 WchT U26 04th – Round 13.1 – Olafsson, Fridrik – 1/2-1/2 – Filip, Miroslav – G163 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5
1958 It Kienbaum GER – Round 10 – Kostro, Jerzy – 1-0 – Kozma, Julius – G15 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5
1958 JUG-13ch Sarajevo BIH – Round 14 – Vukcevich, Milan – 1/2-1/2 – Ivkov, Borislav – G20 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5
1959 Mar del Plata – Round 1 – Fischer, Robert – 1-0 – Sanguineti, Raúl Carlos – G60 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5
1959 Mar del Plata – Round 9 – Fischer, Robert – 1-0 – Sanguineti, Raúl Carlos – G73 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5
1961 Baku ch-URS – Round 14 – Kots, Yuri I – 0-1 – Keres, Paul – G134 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d6 9. h3 Na5 10. Bc2 c5
1961 URS-ch29 – Round 16 – Tal, Mikhail – 1-0 – Gurgenidze, Bukhuti – G11 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5
1962 Match – Round 1 – Mack Lee, Aizyleen – 0-1 – Glicker, J. – G22 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d6 9. h3 Na5 10. Bc2 c5
1962 Spartak Ch – Round 15 – Kondratiev, Pavel E – 1/2-1/2 – Gurgenidze, Bukhuti – G118 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d6 9. h3 Na5 10. Bc2 c5
1963 Kiev Avantgard Ch – Round ? – Bannik, Anatolij – 1/2-1/2 – Bakhmatov, Eduard – G47 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d6 9. h3 Na5 10. Bc2 c5
1964 Belgrade – Round 9 – Matulovic, Milan – 0-1 – Ivkov, Borislav – G66 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 Na5 9. Bc2 O-O 10. h3 c5
1964 Bordeaux Open Bordeaux FRA – Round 4 – Matanovic, Aleksandar – 1-0 – Boutteville, Cesar – G27 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5
1964 Ilford qual – Round 9 – Barden, Leonard – 1/2-1/2 – Haygarth, Michael J – G15 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5
1964 Tel Aviv olm prel – Round 2 – Gragger, Anton Fritz – 0-1 – Matanovic, Aleksandar – G19 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5
1964 Tel Aviv olm prel – Round 5 – Mazzoni, Guy – 1/2-1/2 – Kraidman, Yair – G196 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5
1964 Tel Aviv olm prel – Round 7 – Johansson Rexner, Melker – 1-0 – Kraidman, Yair – G275 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5
1965 Berlin tt – Round 1 – Hecht, Hans-Joachim – 1-0 – Zuidema, Coen – G6 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5
1965 Hungary – Round 1 – Barczay, Laszlo – 1-0 – Kovacs, Laszlo M – G99 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d6 9. h3 Na5 10. Bc2 c5
1966 Ch (Men) Budapest HUN – Round 9 – Szilagyi, Peter – 1/2-1/2 – Kurtesch Laszlo – G16 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d6 9. h3 Na5 10. Bc2 c5
1966 La Habana olm prel – Round 2 – Ujtumen, Tudev – 0-1 – Ivkov, Borislav – G73 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d6 9. h3 Na5 10. Bc2 c5
1966 Tel Aviv 6th – Round 8 – Yanofsky, Daniel Abraham – 1/2-1/2 – Kraidman, Yair – G29 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d6 9. h3 Na5 10. Bc2 c5
1967 IBM – Round 5 – Ciric, Dimitrije – 1/2-1/2 – Portisch, Lajos – G23 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5
1967 Vrnjacka Banja zt – Round 3 – Kostro, Jerzy – 1/2-1/2 – Bilyap, Siracettin – G23 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Be7 7. Re1 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5
1967 Vrnjacka Banja zt – Round 9 – Jansa, Vlastimil – 1/2-1/2 – Kostro, Jerzy – G64 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5
1967 YUG-URS – Round 5 – Geller, Efim P – 1-0 – Ivkov, Borislav – G17 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d6 9. h3 Na5 10. Bc2 c5
1967 YUG-URS women – Round 6 – Nedeljkovic, Verica – 0-1 – Zatulovskaya, Tatiana – G7 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 Na5 9. Bc2 c5 10. h3 O-O
1968 Amsterdam m1 – Round 3 – Cuijpers, Frans Andre – 0-1 – Ivkov, Borislav – G3 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5
1969 JUG-URS – Round 1 – Geller, Efim P – 1-0 – Ivkov, Borislav – G13 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d6 9. h3 Na5 10. Bc2 c5
1969 Rubinstein Memorial – Round 6 – Kostro, Jerzy – 1/2-1/2 – Ivkov, Borislav – G23 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5
1969 Rubinstein Memorial – Round 8 – Jansa, Vlastimil – 1/2-1/2 – Ivkov, Borislav – G31 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5
1970 Vinkovci – Round 15 – Parma, Bruno – 1-0 – Ozanic, Marijan – G102 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5
1972 Skopje ol (Men) fin-A – Round 5 – Byrne, Robert – 1/2-1/2 – Ivkov, Borislav – G324 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5
Erevan ch-URS 1975 – Round 1 – Bronstein, David Ionovich – 1/2-1/2 – Geller, Efim P – G26 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5
Moskou ch-URS 1973 – Round 1 – Korchnoi, Viktor – 1-0 – Smyslov, Vassily – G56 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d6 9. h3 Na5 10. Bc2 c5
Moskou ch-URS 1973 – Round 14 – Tukmakov, Vladimir B – 1/2-1/2 – Smyslov, Vassily – G86 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d6 9. h3 Na5 10. Bc2 c5
Petropolis Interzonal 1973 – Round 7 – Keres, Paul – 0-1 – Smyslov, Vassily – G28 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d6 9. h3 Na5 10. Bc2 c5
Rio de Janeiro Interzonal 1979 – Round 18 – Balashov, Yuri S – 1/2-1/2 – Ivkov, Borislav – G57 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5

C97f —

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.c3 d6 9.h3 Na5 10.Bc2 c5 11.d4 Qc7 12.Nbd2 Re8

Eval: [+0.83]

Les coups candidats

13.Nf1 — 78.8% (690 parties)

Ambassadeurs : Malmstroem, Jan Hendrik (9x), Ivkov, Borislav (8x), Milic, Borislav (5x), Donner, Jan-Hein (5x), Matanovic, Aleksandar (5x), Geller, Efim P. (5x), Gonda, Laszlo (5x), Letelier Martner, Rene (4x)

13.d5 — 10.6% (93 parties)

Ambassadeurs : Hlavnicka, Karel (2x), Skibbe, Diana (2x), Atkins, Henry Ernest (1x), Thomas, George Alan (1x), Siaperas, Triantafyllos (1x), Balanel, Ion (1x), Unruh, Harrison (1x), Sauermann, Wilfried (1x)

13.b3 — 4.7% (41 parties)

Ambassadeurs : Korchnoi, Viktor (2x), Smyslov, Vladimir (2x), Pinter, Jozsef (2x), Bortnyk, Mariia (2x), Tosic, Miroslav (1x), Kostic, Vladimir (1x), Balashov, Yuri (1x), Ivkov, Borislav (1x)

13.b4 — 3.5% (31 parties)

Ambassadeurs : Ivkov, Borislav (3x), Kostro, Jerzy (2x), Jansa, Vlastimil (2x), Matulovic, Milan (2x), Vukcevich, Milan (1x), Tal, Mikhail (1x), Gurgenidze, Bukhuti (1x), Shamkovich, Leonid (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	13.Nf1	13.d5	13.b3	13.b4
<1800	32	75%	12%	—	6%
1800-2200	344	81%	11%	4%	2%
2200-2600	216	76%	9%	10%	1%
2600+	11	55%	18%	18%	9%

Évolution par décennie (% des parties)

Décennie	N parties	13.Nf1	13.d5	13.b3	13.b4
1900s	1	100%	—	—	—
1920s	4	75%	25%	—	—
1940s	4	100%	—	—	—
1950s	47	85%	4%	—	4%
1960s	44	82%	2%	—	14%
1970s	43	63%	5%	9%	14%
1980s	36	78%	14%	3%	3%
1990s	97	76%	19%	1%	4%
2000s	274	87%	8%	1%	2%
2010s	289	74%	11%	10%	2%
2020s	37	65%	30%	3%	3%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
13.Nf1	74%	65%	▼ -9.2%
13.d5	11%	30%	▲ +19.0%
13.b3	10%	3%	▼ -7.7%
13.b4	2%	3%	▲ +0.6%

Joueurs célèbres

Champions du monde dans cette position

Smyslov, Vladimir — 5 parties
Tal, Mikhail — 1 partie

Parties historiques

13.Nf1 — 78.8% (690 parties)

1909 — Sergeant, Edward vs Mackenzie, Arthur J — 1/2-1/2 — Scarborough ENG
1925 — Asztalos, Lajos vs Havasi, Kornel — 1/2-1/2 — Debrecen HUN
1928 — Steiner, Lajos vs Przepiorka, Dawid — 0-1 — Amateur championship
1928 — Steiner, Endre vs Sapira, Emmanuel — 1-0 — The Hague NED
1945 — Boleslavsky, Isaac vs Koblencs, Alexander — 1/2-1/2 — Moskou ch-URS

13.d5 — 10.6% (93 parties)

1924 — Atkins, Henry Ernest vs Thomas, George Alan — 1/2-1/2 — Southport ENG
1956 — Siaperas, Triantafyllos vs Balanel, Ion — 0-1 — Moscow RUS
1956 — Unruh, Harrison vs Sauermann, Wilfried — 0-1 — cr.
1962 — Mack Lee, Aizyleen vs Glicker, J. — 0-1 — match
1973 — Cosulich, Roberto vs Ivkov, Borislav — 1/2-1/2 — Madonna di Campiglio

13.b3 — 4.7% (41 parties)

1973 — Korchnoi, Viktor vs Smyslov, Vladimir — 1-0 — URS
1973 — Korchnoi, Viktor vs Smyslov, Vladimir — 1-0 — Moskou ch-URS
1977 — Pineault, Denis vs Berube, Richard — 1/2-1/2 — CAN
1979 — Balashov, Yuri vs Ivkov, Borislav — 1/2-1/2 — Rio de Janeiro BRA
1982 — Tosic, Miroslav vs Kostic, Vladimir — 0-1 — Vrnjacka Banja SRB

13.b4 — 3.5% (31 parties)

1955 — Shamkovich, Leonid vs Chukaev, Egor — 1-0 — Voroshilovgrad
1958 — Vukcevich, Milan vs Ivkov, Borislav — 1/2-1/2 — JUG-13ch Sarajevo BIH
1961 — Tal, Mikhail vs Gurgenidze, Bukhuti — 1-0 — Baku AZE
1964 — Johansson Rexner, Melker vs Kraidman, Yair — 1-0 — Tel Aviv ISR
1965 — Zagorovsky vs Andreasson Nyman, Samuel — 1-0 — cr C-2000

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