A29x - 8.Rb1 - Four Knights (1993)

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A29x — Four Knights (1993)
1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.g3 d5 5.cxd5 Nxd5 6.Bg2 Nb6 7.O-O Be7 8.Rb1
Les coups candidats
8…a5 — 49.9% (555 parties)
Ambassadeurs : Bartsch, Reinhard Andrea (9x), Zhak, Boris (7x), Farias, Sergio Roberto Alves (6x), Romanishin, Oleg M (5x), Karjakin, Sergey (5x), Zielinski, Sergej (5x), Sarno, Spartaco (4x), Gouw, Carol-Peter (3x)
8…O-O — 28.2% (314 parties)
Ambassadeurs : Scherer, Max (5x), Zhak, Boris (4x), Miezis, Normunds (3x), Grant, Jonathan I M (3x), Serper, Grigory (2x), Kamsky, Gata (2x), Perez Garcia, Rodney Oscar (2x), Sariego Figueredo, Wilfredo (2x)
8…Be6 — 9.3% (103 parties)
Ambassadeurs : Palac, Mladen (4x), Motzer, Heinrich, Dr. (2x), Gurevich, Mikhail (2x), Krakovský, Peter (2x), Maroroa Jones, Gawain C B (2x), Georgiev, Kiril (1x), Baginskaite, Kamile (1x), Erneste, Inguna (1x)
8…g5 — 6.6% (74 parties)
Ambassadeurs : Karpatchev, Aleksandr (5x), Serper, Grigory (3x), Korchnoi, Viktor (3x), Hector, Jonny (3x), Degerman, Lars (2x), Fraga Portilho, Gilberto (1x), Montoro, Gustavo E. (1x), Claesen, Pieter (1x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 8…a5 8…O-O 8…Be6 8…g5
<1800 30 53% 20% 10% 13%
1800-2200 352 51% 32% 9% 4%
2200-2600 607 50% 27% 9% 8%
2600+ 65 55% 15% 9% 9%
Évolution par décennie (% des parties)
Décennie N parties 8…a5 8…O-O 8…Be6 8…g5
1980s 2 — 100% — —
1990s 162 30% 40% 8% 9%
2000s 250 38% 38% 8% 11%
2010s 559 56% 23% 12% 5%
2020s 140 72% 16% 4% 2%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
8…a5 56% 72% ▲ +16.3%
8…O-O 23% 16% ▼ -7.5%
8…Be6 12% 4% ▼ -7.3%
8…g5 5% 2% ▼ -3.0%
Joueurs célèbres
Champions du monde dans cette position
Kasparov, Garry — 2 parties
Ding, Liren — 1 partie
Kramnik, Vladimir — 1 partie
Parties historiques
8…a5 — 49.9% (555 parties)
1992 — Adorjan, Andras vs Cebalo, Miso — 1/2-1/2 — Polanica Zdroj POL
1992 — Adorjan, Alex vs Cebalo, Miso — 1/2-1/2 — Polanica Zdroj POL
1993 — Pevzner, Albert vs Schwartzman, Gabriel — 0-1 — Groningen NED
1993 — Pevzner, Albert vs Schwartzman, Gabriel — 0-1 — Groningen open
1993 — Hansen, Lars Bo vs Romanishin, Oleg M — 1/2-1/2 — Polanica Zdroj POL
8…O-O — 28.2% (314 parties)
1984 — Hjorth, Greg vs Morovic Fernandez, Ivan — 1/2-1/2 — Thessaloniki olm
1989 — Shirazi, Kamran vs Benjamin, Joel — 1-0 — Philadelphia, PA USA
1991 — Shvedchikov, Anatoli I. vs Olbrich, Joachim — 1-0 — Moscow RUS
1991 — Sorokin, Maxim vs Savon, Vladimir — 1/2-1/2 — Chelyabinsk RUS
1992 — Adorjan, Alex vs Lin, Weiguo — 0-1 — Shenzhen
8…Be6 — 9.3% (103 parties)
1991 — Adorjan, Andras vs Sanchez Angulo, Javier Oswaldo — 1-0 — Manila PHI
1993 — Anderson, Gordon M vs Poppe, Mia — 1/2-1/2 — ?
1993 — Hodgson, Julian M vs Romanishin, Oleg M — 1/2-1/2 — Belgrade SRB
1994 — Baginskaite, Kamile vs Erneste, Inguna — 1/2-1/2 — GER
1994 — Poldauf, Dirk vs Parfenov, Vladislav — 0-1 — Groningen open
8…g5 — 6.6% (74 parties)
1993 — Serper, Grigory vs Korchnoi, Viktor — 0-1 — Groningen NED
1993 — Curtacci, Sergio vs Baumgartner, Walter — 1/2-1/2 — cr.
1993 — Serper, Grigory vs Korchnoi, Viktor — 0-1 — Groningen NED
1993 — Serper, Grigory vs Korchnoi, Viktor — 0-1 — Groningen NED
1993 — Hodgson, Julian M vs Bareev, Evgeny — 1/2-1/2 — Belgrade SRB