D47e — Semi-Slav: Meran, Capablanca, 8…a6
○ Trait aux Blancs
Ouverture — Centre semi-ouvert
♔ Point de vue Blancs
Faiblesses adverses : arriéré c6, Bc8 enfermé, Bf8 enfermé, roi noir au centre.
Problèmes : roi au centre, Bc1 enfermé, 3 pièces non développées (C1, A1, H1).
Plans :
● O-O — Mettre le roi en sécurité, connecter les tours
● Bd2 — Développer Bc1
● h3 — Empêcher ...Bg4
● Rc — Tour sur colonne c
♚ Point de vue Noirs
Faiblesses adverses : Bc1 enfermé, roi blanc au centre.
Problèmes : roi au centre, Bc8 enfermé, Bf8 enfermé, arriéré c6, 4 pièces non développées (C8, F8, A8, H8).
Plans :
● O-O — Mettre le roi en sécurité, connecter les tours
● ...Bg4 — PRIORITÉ: libérer le Bc8 (...Bg4, ...Bf5)
● ...Be7 — Développer Bf8
● ...c5 — Rupture
● ...e5 — Rupture
a6 est joué dans 98% des parties pour atteindre cette position. Le coup principal est 8.e4 (49%). L'alternative principale est 8.O-O (43%). 40% de nulles chez les 2600+.
| Coup | Total | <1800 | 1800-2200 | 2200-2600 | 2600+ |
|---|---|---|---|---|---|
| a6 | 98.2% (551) | 100.0% | 98.5% | 97.5% | 100.0% |
| Nbd7 | 1.8% (10) | — | 1.5% | 2.5% | — |
| Décennie | Parties | Nulles |
|---|---|---|
| 1970s | 12 | 33% |
| 1980s | 12 | 16% |
| 1990s | 134 | 34% |
| 2000s | 160 | 41% |
| 2010s | 184 | 39% |
| 2020s | 23 | 52% |
| Coup | 2010 | 2020 | Tendance |
|---|---|---|---|
| Nbd7 | 1.1% | 21.7% | ▲ +20.6% |
| a6 | 98.9% | 78.3% | ▼ -20.6% |
8.e4 (49.4%) : W:46% D:37% B:15%. 277 parties.
8.O-O (43.3%) : W:29% D:40% B:30%. 243 parties.
8.a3 (4.5%) : W:40% D:32% B:28%. 25 parties.
Plans des Noirs : À compléter.
W:46% D:37% B:15%. Première : Goltsov, L. vs Moiseev, Viktor, ? 1970.
W:29% D:40% B:30%. Première : Ivanov, Igor V. vs Dahlberg, Ivars, Los Angeles It 1982.
W:40% D:32% B:28%. Première : Bach Guillamon, Francisco vs Kuijf, Marinus, Sitges Open 1997.
W:14% D:42% B:42%.
W:25% D:50% B:25%.
W:33% D:33% B:33%.
| Coup | Total | <1800 | 1800-2200 | 2200-2600 | 2600+ |
|---|---|---|---|---|---|
| 8.e4 | 49.4% | 21.4% | 35.6% | 60.8% | 70.0% |
| 8.O-O | 43.3% | 57.1% | 55.9% | 35.0% | 30.0% |
| 8.a3 | 4.5% | 7.1% | 6.4% | 2.8% | — |
| 8.a4 | 1.2% | — | 0.5% | 0.7% | — |
| 8.Qc2 | 0.7% | — | 1.0% | 0.4% | — |
| 8.Bd2 | 0.5% | 14.3% | — | — | — |
| Coup | 1970 | 1980 | 1990 | 2000 | 2010 | 2020 |
|---|---|---|---|---|---|---|
| 8.e4 | 75.0% | 66.7% | 69.4% | 43.1% | 40.8% | 21.7% |
| 8.O-O | 25.0% | 33.3% | 27.6% | 49.4% | 50.0% | 65.2% |
| 8.a3 | — | — | 3.0% | 6.2% | 4.9% | 4.3% |
| 8.a4 | — | — | — | 0.6% | — | 8.7% |
| 8.Qc2 | — | — | — | 0.6% | 1.6% | — |
| Coup | 2010 | 2020 | Tendance |
|---|---|---|---|
| 8.e4 | 40.8% | 21.7% | ▼ -19.1% |
| 8.O-O | 50.0% | 65.2% | ▲ +15.2% |
| 8.a3 | 4.9% | 4.3% | ▼ -0.6% |
| 8.a4 | 0.0% | 8.7% | ▲ +8.7% |
| 8.Qc2 | 1.6% | 0.0% | ▼ -1.6% |
Premières occurrences (2400+) :
e4 — 1970 : Goltsov, L. vs Moiseev, Viktor (?)
O-O — 1982 : Ivanov, Igor V. vs Dahlberg, Ivars (Los Angeles It)
a3 — 1997 : Bach Guillamon, Francisco vs Kuijf, Marinus (Sitges Open)
Nd2 — 2018 : Golod, Vitali vs Parkhov, Yair (TCh-ISR 2018)
Ftacnik, Lubomir (3x, +2 =1 -0, Elo 2589, 1996-1999, e4)
Capablanca, Jose (3x, +0 =3 -0, Elo ?, 1927-1931, a3)
Bogoljubow, Efim (2x, +0 =1 -1, Elo ?, 1931-1931, e4)
Rubinstein, Akiba (1x, +0 =0 -1, Elo ?, 1925-1925, O-O)
Keres, Paul (1x, +0 =0 -1, Elo ?, 1952-1952, O-O)
Taimanov, Mark E (1x, +1 =0 -0, Elo 2580, 1974-1974, e4)
Benko, Pal (1x, +1 =0 -0, Elo 2530, 1973-1973, e4)
Najdorf, Miguel (1x, +1 =0 -0, Elo 2510, 1975-1975, e4)
Pachman, Ludek (1x, +0 =1 -0, Elo ?, 1949-1949, e4)
1925 — Liberman Rubinstein, Joseph vs Lasker Md Nazmul, Islam — 0-1 — My System Page
1925 — Rubinstein, Akiba vs Lasker, Emanuel — 0-1 — Moscow
1927 — Capablanca, Jose vs Alekhine, Alexander — 1/2-1/2 — New York
1928 — Capablanca, Jose vs Spielmann, Rudolf — 1/2-1/2 — Berlin Tageblatt
1929 — Geiger, Hans vs Pirc, Vasja — 0-1 — Rogaska Slatina
1931 — Bogoljubow, Efim vs Hoffmann Heinz — 0-1 — sim Konigsberg
1931 — Bogoljubow, Efim vs Vidmar Milan — 1/2-1/2 — Bled
1947 — Kan, Ilya A vs Kamyshov, Mikhail — 1-0 — Moscow RUS
1947 — Kan, Ilya A vs Simagin, Vladimir — 1/2-1/2 — Moscow RUS
1948 — Bondarevsky, Igor vs Kotov Lundqvist, Alex — 0-1 — Moskou ch-URS
1923 — Teichmann, Richard vs Rubinstein, Akiba — 1/2-1/2 — Karlsbad
1942 — Rellstab, Ludwig Sr vs Junge, Klaus — 0-1 — Munich
1947 — Ahues, Carl vs Roedl, Ludwig — 0-1 — Nt Lueneburg GER
1950 — Letelier Martner, Rene vs Wade, Robert G — 0-1 — Venice
2006 — Jakobsen, Odinn Orn (2387) vs Gretarsson, Hjorvar Steinn (2139) — 1/2-1/2 — Politiken Cup
1931 — Capablanca, Jose vs Euwe, Max — 1/2-1/2 — Amsterdam m3
1990 — Savva, Panikos (1923) vs Constantinou, Agathoclis — 1/2-1/2 — CYP Ch
1997 — Bach Guillamon, Francisco vs Kuijf, Marinus — 0-1 — Sitges Open
1998 — Livner, Anders (2303) vs Andersson, Mans 1974 (2320) — 1/2-1/2 — Stockholm Elo
1999 — Maksyutov, E. (2341) vs Somkin, Evgeni (2366) — 0-1 — RUS Ch sf