D15r - 5…b5 6.a4 b4 - Accepted, Alekhine (1922)

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D15r — Accepted, Alekhine (1922)
1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.e3 b5 6.a4 b4
Les coups candidats
7.Na2 — 61.8% (858 parties)
Ambassadeurs : Lechtynsky, Jiri (12x), Iotov, Valentin (12x), Iljushin, Alexei (7x), Dimitrov, Vladimir (6x), Serper, Grigory (5x), Gufeld, Eduard (4x), Lutikov, Anatoly S (3x), Komarov, Dimitri (3x)
Ambassadeurs : Schneider, Ilja (8x), Nikolic, Predrag (8x), Hellsten, Johan (5x), Sanikidze, Tornike (5x), Pinter, Jozsef (4x), Jelling, Erik (4x), Varga, Peter (4x), Olsen, Heini (4x)
7.Ne2 — 2.3% (32 parties)
Ambassadeurs : Romanishin, Oleg M (6x), Bosboom, Manuel (2x), Shamkovich, Leonid (1x), Lazarev, Efim M. (1x), Gormally, Daniel W (1x), Summerscale, Aaron P (1x), Middelburg, Tom (1x), Sokolov, Ivan (1x)
7.Ne5 — 0.1% (1 parties)
Ambassadeurs : Francois, Denis (1x), Adriaans, Marion (1x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 7.Na2 7.Nb1 7.Ne2 7.Ne5
<1800 88 77% 20% 1% 1%
1800-2200 474 72% 26% 2% —
2200-2600 608 50% 47% 3% —
2600+ 21 24% 76% — —
Évolution par décennie (% des parties)
Décennie N parties 7.Na2 7.Nb1 7.Ne2 7.Ne5
1950s 41 93% 7% — —
1960s 30 63% 33% 3% —
1970s 25 60% 40% — —
1980s 63 48% 52% — —
1990s 277 40% 58% 1% 0%
2000s 445 71% 26% 3% —
2010s 435 63% 34% 3% —
2020s 73 74% 19% 7% —
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
7.Na2 63% 74% ▲ +10.8%
7.Nb1 34% 19% ▼ -14.8%
7.Ne2 3% 7% ▲ +4.3%
7.Ne5 0% 0% +0.0%
Joueurs célèbres
Champions du monde dans cette position
Kasparov, Garry — 3 parties
Smyslov, Vladimir — 1 partie
Parties historiques
7.Na2 — 61.8% (858 parties)
1950 — Bosch van Rosenthal, Edzard vs Purdy, Cecil J S — 1/2-1/2 — cr.
1950 — Collet, Hugo vs Shainswit, George — 1-0 — Dubrovnik olm
1950 — Fairhurst, William vs Katz, Jacob — 1/2-1/2 — Buxton
1950 — Benko, Pal vs Bely, Miklos — 1-0 — Budapest HUN
1950 — Pruner, Earl Wilson vs Lynch, Peter J. — 1-0 — San Francisco, CA USA
7.Nb1 — 35.8% (497 parties)
1950 — Taimanov, Mark vs Matzkewitsch, A. — 1-0 — Leningard
1951 — Makarczyk, Kazimierz vs Alexandrescu, Gheorghe — 0-1 — Bucharest ROU
1957 — Richter, Hildegard vs Aarnav Kar — 1-0 — Soemmerda
1960 — Trifunovic, Petar vs Bely, Miklos — 0-1 — Marianske Lazne
1961 — Radulov, Ivan vs Kadrev, Zdravko Minchev — 1-0 — Sofia BUL
7.Ne2 — 2.3% (32 parties)
1966 — Shamkovich, Leonid vs Lazarev, Efim M. — 0-1 — URS
1999 — Gormally, Daniel W vs Summerscale, Aaron P — 1/2-1/2 — York ENG
1999 — Bosboom, Manuel vs Middelburg, Tom — 1-0 — Wijk aan Zee NED
2000 — Tyomkin, Dimitri vs Lesiege, Alexandre — 0-1 — Montreal CAN
2000 — Campos Moreno, Javier B. vs Franco Ocampos, Zenon — 0-1 — Open Mallorca ESP
7.Ne5 — 0.1% (1 parties)
1996 — Francois, Denis vs Adriaans, Marion — 1-0 — Compuserve casual