C86e - 8.a4 - Spanish: Worrall Attack (1931)

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C86e — Spanish: Worrall Attack (1931)
1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Qe2 b5 7.Bb3 O-O 8.a4
Les coups candidats
8…b4 — 52.4% (97 parties)
Ambassadeurs : Ciric, Dragoljub M (6x), Tal, Mikhail (2x), Korchnoi, Viktor (2x), Leoncini, Mario (2x), Popa, Florin (2x), Hassall, Kim (2x), Tranmer, Eileen Betsy (1x), Walsh, James Joseph (1x)
8…Bb7 — 27.6% (51 parties)
Ambassadeurs : Filipowicz, Andrzej (3x), Bremond, Eric (2x), Kolarov, Atanas Stefanov (1x), Madan Rajasekaran (1x), Westerinen, Heikki M.J. (1x), Keres, Paul (1x), Kluger, Gyula (1x), Lehmann, Heinz (1x)
8…Rb8 — 16.2% (30 parties)
Ambassadeurs : Maderna, Carlos (2x), Ciric, Dragoljub M (2x), De Souza Mendes, Joao (1x), Ostojic, Miodrag (1x), Pollak, Georg (1x), Kaladnik (1x), Budner, Eugenuisz (1x), Rivise, Irving (1x)
8…d5 — 1.6% (3 parties)
Ambassadeurs : Keres, Paul Petrovich (1x), Unzicker, Ferdinand, Dr. (1x), Nalovic, Zoran (1x), Jovcic, Milan (1x), Broberger, Henry (1x), Boroja, Iva (1x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 8…b4 8…Bb7 8…Rb8 8…d5
<1800 5 40% 40% — —
1800-2200 57 58% 21% 19% —
2200-2600 59 51% 34% 15% —
2600+ 1 100% — — —
Évolution par décennie (% des parties)
Décennie N parties 8…b4 8…Bb7 8…Rb8 8…d5
1950s 16 50% 19% 25% 6%
1960s 27 59% 19% 19% 4%
1970s 11 45% 27% 18% 9%
1980s 15 40% 47% 7% —
1990s 33 48% 24% 24% —
2000s 30 50% 30% 13% —
2010s 39 56% 31% 13% —
2020s 14 64% 29% 7% —
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
8…b4 56% 64% ▲ +7.9%
8…Bb7 31% 29% ▼ -2.2%
8…Rb8 13% 7% ▼ -5.7%
8…d5 0% 0% +0.0%
Joueurs célèbres
Champions du monde dans cette position
Tal, Mikhail — 2 parties
Parties historiques
8…b4 — 52.4% (97 parties)
1953 — Polak, Tomas vs Estrin, Yakov01 B — 0-1 — Leningrad RUS
1955 — Tranmer, Eileen Betsy vs Walsh, James Joseph — 0-1 — Hastings ENG
1956 — Nemec, Tadeus vs Weiner, Milan — 1/2-1/2 — Bratislava SVK
1957 — Goldberg, Grigory vs Nezhmetdinov, Rashid — 1-0 — Kiev UKR
1957 — Lehmann, Abel vs Kluger, Carsten — 1-0 — Varna BUL
8…Bb7 — 27.6% (51 parties)
1955 — Keres, Paul vs Kluger, Gyula — 1-0 — Budapest HUN
1955 — Chistiakov, Alexander vs Ragozin, Viacheslav — 0-1 — Moscow RUS
1959 — Lehmann, Heinz vs Wolk, Sigmund — 1/2-1/2 — FRG-ch Nuerenberg GER
1960 — Bisguier, Arthur B vs Kalme, G. — 1-0 — New York ch-USA
1964 — Madan Rajasekaran vs Westerinen, Heikki M.J. — 1/2-1/2 — Tel Aviv ISR
8…Rb8 — 16.2% (30 parties)
1951 — De Souza Mendes, Joao vs Maderna, Carlos — 0-1 — Mar del Plata ARG
1951 — Flores Alvarez, Rodrigo vs Maderna, Carlos — 1/2-1/2 — Mar del Plata ARG
1954 — Rivise, Irving vs Martin, Raymond — 1-0 — San Francisco, Ca
1956 — Kaladnik vs Budner, Eugenuisz — 0-1 — Dopisni
1960 — Petersen, Finn vs Franco, Sigifredo — 0-1 — Aalborg DEN
8…d5 — 1.6% (3 parties)
1956 — Keres, Paul Petrovich vs Unzicker, Ferdinand, Dr. — 1/2-1/2 — Moscow olm fin-A
1969 — Nalovic, Zoran vs Jovcic, Milan — 1/2-1/2 — ?
1976 — Broberger, Henry vs Boroja, Iva — 1-0 — corr SWE/K tt