A36c - 4…Nf6 - Keres-Parma System (1905)

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A36c — Symmetrical, Keres-Parma System (1905)
1.c4 c5 2.Nc3 Nc6 3.g3 e6 4.Nf3 Nf6
Les coups candidats
5.Bg2 — 94.8% (2584 parties)
Ambassadeurs : Parma, Bruno (22x), Greenfeld, Alon (20x), Uhlmann, Wolfgang (15x), Portisch, Lajos (11x), Magerramov, Elmar (10x), Korchnoi, Viktor (9x), Petursson, Margeir (8x), Karpov, Anatoly (8x)
5.d4 — 3.3% (90 parties)
Ambassadeurs : Garcia Gonzales, Guillermo (2x), Huda, Rehan (2x), Portisch, Lajos (1x), Lengyel, Levente (1x), Beliavsky, Alexander G (1x), Yap Heng Kai (1x), Utasi, Tamas (1x), Iversen, Jardar (1x)
5.e4 — 0.8% (21 parties)
Ambassadeurs : Eiselt, Peter (1x), Lange, Reinhold (1x), De Eccher, Stefano (1x), Gallo, Enrico (1x), Lazaris, Stelios (1x), Kyriazis, Stephanos (1x), Coric, Mael (1x), Kamenecki, Stjepan (1x)
5.d3 — 0.6% (17 parties)
Ambassadeurs : Jakubowski, Karl (2x), Basic, Sokolov (1x), Ljiljak, Milka (1x), Clemens, Ulrich (1x), Hermann, Manfred (1x), Minotti, Nicolino (1x), D'Intino, Vitale (1x), Malibran, A. (1x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 5.Bg2 5.d4 5.e4 5.d3
<1800 204 95% 2% 2% 1%
1800-2200 978 94% 4% 1% 1%
2200-2600 1027 98% 2% 0% —
2600+ 54 93% 7% — —
Évolution par décennie (% des parties)
Décennie N parties 5.Bg2 5.d4 5.e4 5.d3
1950s 5 100% — — —
1960s 38 95% 3% — 3%
1970s 138 96% 3% — —
1980s 247 94% 3% 1% 0%
1990s 467 92% 6% 1% 1%
2000s 724 94% 3% 1% 1%
2010s 793 96% 3% 1% 0%
2020s 314 98% 2% 0% —
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
5.Bg2 96% 98% ▲ +1.9%
5.d4 3% 2% ▼ -1.3%
5.e4 1% 0% -0.4%
5.d3 0% 0% -0.4%
Joueurs célèbres
Champions du monde dans cette position
Karpov, Anatoly — 8 parties
Kramnik, Vladimir — 4 parties
Anand, Viswanathan — 4 parties
Tal, Mikhail — 2 parties
Carlsen, Magnus — 2 parties
Kasparov, Garry — 1 partie
Gukesh D — 1 partie
Ding, Liren — 1 partie
Parties historiques
5.Bg2 — 94.8% (2584 parties)
1950 — Stahlberg, Gideon vs Kottnauer, Cenek — 1-0 — Amsterdam NED
1956 — Hultgren, Ralph vs Van Deene, Gerard — 1-0 — Fresno, CA
1956 — Bolbochan, Julio vs Miguel, Nahuel — 1/2-1/2 — Mar del Plata ARG
1959 — Petrosian, Tigran V. vs Keres, Paul Petrovich — 1/2-1/2 — Bled ct
1959 — Uhlmann, Wolfgang vs Bertholdt, Dieter — 1-0 — Dresden GER
5.d4 — 3.3% (90 parties)
1962 — Portisch, Lajos vs Lengyel, Levente — 1/2-1/2 — Budapest HUN
1976 — Beliavsky, Alexander G vs Garcia Gonzales, Guillermo — 1-0 — Cienfuegos City CUB
1976 — Christiansen, Larry vs Cleghorn, Peter — 1-0 — Lone Pine, CA USA
1976 — Vukic, Milan vs Garcia Gonzales, Guillermo — 1/2-1/2 — Novi Sad SRB
1978 — Soos, Bela vs Suess, Alois — 1-0 — BL-SW 7879
5.e4 — 0.8% (21 parties)
1983 — Eiselt, Peter vs Lange, Reinhold — 1-0 — Wilthen
1983 — De Eccher, Stefano vs Gallo, Enrico — 0-1 — Venice ITA
1990 — Berkes, Joerg, Dr. vs Scholz, Rudolf — 1/2-1/2 — SB RHH RHLG 90
1994 — Coric, Mael vs Kamenecki, Stjepan — 0-1 — Djakovo
1998 — Lazaris, Stelios vs Kyriazis, Stephanos — 1/2-1/2 — Cyprus
5.d3 — 0.6% (17 parties)
1969 — Basic, Sokolov vs Ljiljak, Milka — 1/2-1/2 — Pula CRO
1987 — Clemens, Ulrich vs Hermann, Manfred — 0-1 — Dortmund open
1994 — Malibran, A. vs Arjona, Ariel — 0-1 — cr.
1996 — Minotti, Nicolino vs D'Intino, Vitale — 1-0 — Rome,ITA ch
1996 — Schweigert Ellen vs Gerber, Tatjana — 1-0 — ?