B27p — Sicilian: Accelerated Pterodactyl, 4.dxc5 Qa5+ 5.Nc3

1.e4 c5 2.Nf3 g6 3.d4 Bg7 4.dxc5 Qa5+ 5.Nc3 * ● Trait aux Noirs

Ouverture — Centre mobile

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Plans. Bd3 (Fou actif (mobilité 5), Développer f1 — 26 % des parties) ; Nd2 (9 % des parties).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Plans. ...Bxc3+ (Fou actif (mobilité 8) — 44 % des parties) ; ...Nf6 (Développer g8 — 35 % des parties) ; ...Qxc5 (Centraliser la dame — 18 % des parties).

Avantages

Faiblesses

Diagonale active

Plans

Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	● c2, ● c5	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	—	● f7→g6, h7→g6
Passés	—	—
Majorité	● aile dame 4v2	—

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● d4 (2v1), ● b5 (2v1), ● d5 (3v0), ● g5 (2v0)	—
Cases faibles	—	—
Centre	● d4 (2v1), ● d5 (3v0), ● e4 (1v0)	—

Colonnes et diagonales

	♔ Blancs	♚ Noirs
Semi-ouvertes	● d	● c

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 5)
Bf1	● Bf1 Non développé (mob. 5)
Bg7		● Bg7 Actif (mob. 6)
Bc8		● Bc8 Non développé (mob. 0)
Paire de fous	● Oui	● Oui
Clouages	● knight c3	—
Non développées	4 (● c1, ● f1, ● a1, ● h1)	5 (● b8, ● g8, ● c8, ● a8, ● h8)

Sécurité du roi

	♔ Blancs	♚ Noirs
Statut	● Au centre	● Au centre
Droits de roque	O-O / O-O-O	O-O / O-O-O

Thèmes

	♔ Blancs	♚ Noirs
Phase	Ouverture
Centre	mobile
Ruptures	● c5-c6	● …d7-d6, ● …d7-d5, ● …f7-f5

Partie
1958 YUG Ch 13th – Round 17 – Bogdanovic, Rajko – 1-0 – Sofrevski, Jovan – G91 1. e4 c5 2. Nf3 g6 3. d4 Bg7 4. dxc5 Qa5+ 5. Nc3 Nc6 6. Bd3 Qxc5 7. O-O Nf6 8. Be3 Qh5 9. h3 O-O 10. Qd2 Qa5
1963 Hoogovens – Round 4 – Robatsch, Karl – 1-0 – Van Scheltinga, Theo – G40 1. e4 c5 2. Nf3 g6 3. d4 Bg7 4. dxc5 Qa5+ 5. Nc3 Bxc3+ 6. bxc3 Qxc3+ 7. Bd2 Qxc5 8. Rb1 d6 9. Bb5+ Bd7 10. Bd3 Qc7
1966 La Habana olm fin-C – Round 1 – Kaplan, Julio – 0-1 – Yepez, Osvaldo – G5 1. e4 c5 2. Nf3 g6 3. d4 Bg7 4. Nc3 Qa5 5. dxc5 Bxc3+ 6. bxc3 Qxc3+ 7. Bd2 Qxc5 8. Bd3 d6 9. Rb1 Nf6 10. O-O O-O
1967 DEN Ch – Round 7 – Hvenekilde, Jorgen – 0-1 – Petersen, Finn – G26 1. d4 g6 2. e4 Bg7 3. Nc3 c5 4. dxc5 Qa5 5. Nf3 Nf6 6. Bd3 Qxc5 7. e5 Ng4 8. O-O O-O 9. Bg5 Nc6 10. Nd2 Ngxe5
1967 Hoogovens – Round 1 – Lutikov, Anatoly S – 1-0 – Larsen, Benjamin Holsko – G5 1. e4 c5 2. Nf3 g6 3. d4 Bg7 4. dxc5 Qa5+ 5. Nc3 Nf6 6. Nd2 Qxc5 7. Nc4 O-O 8. e5 Ng4 9. Qxg4 d5 10. Be3 Qb4
1967 Jerusalem Wch junior – Round 7 – Ghizdavu, Dumitru – 0-1 – Kaplan, Julio – G10 1. e4 c5 2. Nf3 g6 3. d4 Bg7 4. dxc5 Qa5+ 5. Nc3 Bxc3+ 6. bxc3 Qxc3+ 7. Qd2 Qxa1 8. c3 b5 9. Be2 b4 10. cxb4 Bb7
1967 Rubinstein Memorial – Round 10 – Acevedo Ortega, Rodrigo Andres – 1-0 – Filipowicz, Adam – G39 1. e4 c5 2. Nf3 g6 3. d4 Bg7 4. dxc5 Qa5+ 5. Nc3 Qxc5 6. Bd3 Nc6 7. Bd2 Nf6 8. O-O O-O 9. h3 d6 10. a3 Be6
1967 URS Team Ch – Round 1 – Klovsky, Rafail – 1-0 – Veresov, Gavriil – G70 1. e4 c5 2. Nf3 g6 3. d4 Bg7 4. dxc5 Qa5+ 5. Nc3 Bxc3+ 6. bxc3 Nf6 7. Bd3 Nc6 8. O-O Qxc5 9. Rb1 a6 10. Be3 Qh5
1968 Hoogovens-B – Round 1 – Ciocaltea, Victor – 1-0 – Ostojic, Predrag – G4 1. e4 c5 2. Nf3 g6 3. d4 Bg7 4. dxc5 Qa5+ 5. Nc3 Bxc3+ 6. bxc3 Qxc3+ 7. Qd2 Qxc5 8. Bb2 Nf6 9. Bd3 Nc6 10. O-O O-O
1969 Buesum – Round 8 – Huebner, Robert – 1/2-1/2 – Bilek, Istvan – G36 1. e4 c5 2. Nf3 g6 3. d4 Bg7 4. dxc5 Qa5+ 5. Nc3 Nf6 6. Bd3 Qxc5 7. O-O O-O 8. Nb5 Nc6 9. Be3 Qh5 10. Be2 d6

B27p — Pterodactyl Defense: Sicilian, Rhamphorhynchus (1958)

1.e4 c5 2.Nf3 g6 3.d4 Bg7 4.dxc5 Qa5+ 5.Nc3

Les coups candidats

5…Bxc3+ — 44.4% (189 parties)

Ambassadeurs : Gutierrez Herrera, Jose Antonio (4x), Day, Lawrence A. (3x), Kaplan, Julio (2x), Hobusch, Werner (2x), Markowski, Tomasz (2x), Kochetkov, German (2x), Chatalbashev, Boris (2x), Alsayed, Mohammed (2x)

5…Nf6 — 35.0% (149 parties)

Ambassadeurs : Kaposztas, Miklos (12x), Jakab, Attila (8x), Forintos, Gyozo V (4x), Romanishin, Oleg M (3x), Tonoli, Walter (3x), Bellon Lopez, Juan Manuel (2x), Sosnowska, Elzbieta (2x), Nevednichy, Boris M (2x)

5…Qxc5 — 18.5% (79 parties)

Ambassadeurs : Filipowicz, Andrzej (3x), Antal, Gergely (3x), Gasztonyi, Endre (2x), Murzin, Lenar (2x), Kaposztas, Miklos (2x), Ortega, Rogelio (1x), Kaludjerovic, Vuk (1x), Velimirovic, Dragoljub (1x)

5…Nc6 — 1.6% (7 parties)

Ambassadeurs : Radulov, Ivan (1x), Filipowicz, Andrzej (1x), Fischer, Kevin R (1x), Flynn, Gerard (1x), Bogdanovic, Rajko (1x), Sofrevski, Jovan (1x), Mardarowicz, Jacek (1x), Manasterski, Lutoslaw (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	5…Bxc3+	5…Nf6	5…Qxc5	5…Nc6
<1800	10	70%	20%	10%	—
1800-2200	114	39%	29%	31%	—
2200-2600	252	46%	38%	14%	2%

Évolution par décennie (% des parties)

Décennie	N parties	5…Bxc3+	5…Nf6	5…Qxc5	5…Nc6
1950s	1	—	—	—	100%
1960s	15	33%	40%	13%	13%
1970s	34	32%	47%	18%	3%
1980s	21	33%	43%	19%	5%
1990s	102	39%	50%	11%	—
2000s	157	52%	27%	19%	—
2010s	81	46%	25%	27%	2%
2020s	15	47%	27%	27%	—

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
5…Bxc3+	46%	47%	▲ +1.0%
5…Nf6	25%	27%	▲ +2.0%
5…Qxc5	27%	27%	-0.5%
5…Nc6	2%	0%	▼ -2.5%

Parties historiques

5…Bxc3+ — 44.4% (189 parties)

1963 — Robatsch, Karl vs Bosch van Rosenthal, Edzard — 1-0 — Beverwijk NED
1966 — Kaplan, Julio vs Yepez, Osvaldo — 0-1 — Havana CUB
1967 — Ghizdavu, Dumitru vs Kaplan, Julio — 0-1 — Jerusalem Wch jr
1967 — Klovsky, Rafail vs Veresov, Gavriil — 1-0 — Moscow RUS
1968 — Ciocaltea, Victor vs Ostojic, Predrag — 1-0 — Wijk aan Zee NED

5…Nf6 — 35.0% (149 parties)

1964 — Hennings, Artur vs Filipowicz, Andrzej — 1/2-1/2 — Moscow RUS
1967 — Vasiukov, Evgeni vs Hort, Vlastimil — 1/2-1/2 — Havana CUB
1967 — Hvenekilde, Jorgen vs Petersen, Finn — 0-1 — Vejle DEN
1967 — Lutikov, Anatoly S vs Larsen, Bent Ravn — 1-0 — Beverwijk NED
1967 — Van Riemsdijk, Herman C. vs Asfora, Eduardo Hasbum — 1/2-1/2 — Sao Paulo BRA

5…Qxc5 — 18.5% (79 parties)

1967 — Ortega, Rogelio vs Filipowicz, Andrzej — 1-0 — Polanica Zdroj POL
1969 — Kaludjerovic, Vuk vs Velimirovic, Dragoljub — 1/2-1/2 — Pula CRO
1973 — Sax, Alexander Sebastian vs Gasztonyi, Endre — 1/2-1/2 — HUN
1973 — Horvath, Gyula vs Gasztonyi, Endre — 1-0 — ?
1974 — Schaufelberger, Heinz vs Cuartas, Jaime Alexander — 1-0 — Nice olm

5…Nc6 — 1.6% (7 parties)

1958 — Bogdanovic, Rajko vs Sofrevski, Jovan — 1-0 — Sarajevo BIH
1964 — Fischer, Kevin R vs Flynn, Gerard — 1-0 — McClellan simultaan
1965 — Radulov, Ivan vs Filipowicz, Andrzej — 1-0 — Varna BUL
1976 — Mardarowicz, Jacek vs Manasterski, Lutoslaw — 1/2-1/2 — Vitrobud op Sandomierz
1987 — Maric, Dragan vs Haase, Wolfgang — 0-1 — Kasseler Stadtmeiste