Player profile
Yakovenko, Oleg
Dossier
66 of 71 games analyzed.
Accuracy: 91.5%
Opened Nf3: 24/25Opened d4: 1/25
Castled kingside: 42Same-side castling: 40Opposite-side castling: 7Castled queenside: 5Did not castle: 4
Fianchettoed queenside: 19Played on the queenside: 13Played in the center: 13Played on the kingside: 11Fianchettoed kingside: 9
Active pieces: 40Space advantage: 35Sacrificed material: 32Initiated exchanges: 31Kept the bishop pair: 31Backward pawn: 24Isolated pawn: 19Missed tactics: 13Avoided exchanges: 13Played gambits: 5
Openings
Click "+" to add that group to the games list below. Multiple groups can be added at once.
As White 28 games 12W 11D 5L
Queen's Gambit Declined 4 games 3W 1D 0L
Ragozin Defense 3 games 2W 1D 0L
Alekhine Variation
3 games
2W
1D
0L
Harrwitz Attack 1 game 1W 0D 0L
Fianchetto Defense
1 game
1W
0D
0L
Slav Defense 4 games 1W 3D 0L
Quiet Variation 3 games 0W 3D 0L
(unspecified)
1 game
0W
1D
0L
Pin Defense
1 game
0W
1D
0L
Schallopp Defense
1 game
0W
1D
0L
Modern Line 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Semi-Slav Defense 4 games 3W 0D 1L
Normal Variation 3 games 2W 0D 1L
(unspecified)
3 games
2W
0D
1L
Quiet Variation 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
King's Indian Defense 3 games 1W 1D 1L
Orthodox Variation 3 games 1W 1D 1L
(unspecified)
2 games
1W
0D
1L
Aronin-Taimanov Defense
1 game
0W
1D
0L
English Opening 3 games 2W 1D 0L
Anglo-Indian Defense 2 games 1W 1D 0L
Anglo-Grünfeld Variation
1 game
0W
1D
0L
King's Indian Formation
1 game
1W
0D
0L
Symmetrical Variation 1 game 1W 0D 0L
Anti-Benoni Variation
1 game
1W
0D
0L
Queen's Indian Defense 2 games 0W 1D 1L
Capablanca Variation 1 game 0W 1D 0L
(unspecified)
1 game
0W
1D
0L
Fianchetto Variation 1 game 0W 0D 1L
Nimzowitsch Variation
1 game
0W
0D
1L
Dutch Defense 2 games 1W 0D 1L
Leningrad Variation 1 game 0W 0D 1L
Warsaw Variation
1 game
0W
0D
1L
Classical Variation 1 game 1W 0D 0L
Huisl Variation
1 game
1W
0D
0L
Sicilian Defense 2 games 0W 1D 1L
Accelerated Dragon 1 game 0W 0D 1L
Maróczy Bind, Breyer Variation
1 game
0W
0D
1L
Hyperaccelerated Dragon 1 game 0W 1D 0L
(unspecified)
1 game
0W
1D
0L
Zukertort Opening 1 game 0W 1D 0L
(unspecified) 1 game 0W 1D 0L
(unspecified)
1 game
0W
1D
0L
Queen's Pawn Game 1 game 0W 1D 0L
Zukertort Variation 1 game 0W 1D 0L
(unspecified)
1 game
0W
1D
0L
Bogo-Indian Defense 1 game 0W 1D 0L
Grünfeld Variation 1 game 0W 1D 0L
(unspecified)
1 game
0W
1D
0L
French Defense 1 game 1W 0D 0L
St. George Defense 1 game 1W 0D 0L
Traditional Line
1 game
1W
0D
0L
As Black 28 games 10W 7D 11L
Sicilian Defense 9 games 2W 1D 6L
Najdorf Variation 5 games 2W 1D 2L
English Attack
2 games
2W
0D
0L
(unspecified)
2 games
0W
1D
1L
Lipnitsky Attack
1 game
0W
0D
1L
McDonnell Attack 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
Chekhover Variation 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
Modern Variations 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
Closed 1 game 0W 0D 1L
Carlsen Variation
1 game
0W
0D
1L
English Opening 4 games 2W 0D 2L
King's English Variation 3 games 2W 0D 1L
Four Knights Variation
1 game
1W
0D
0L
(unspecified)
1 game
1W
0D
0L
Four Knights Variation, Fianchetto Line
1 game
0W
0D
1L
Agincourt Defense 1 game 0W 0D 1L
Wimpy System
1 game
0W
0D
1L
Nimzo-Indian Defense 4 games 1W 2D 1L
Normal Variation 3 games 1W 2D 0L
Botvinnik System
2 games
1W
1D
0L
(unspecified)
1 game
0W
1D
0L
Classical Variation 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
Queen's Indian Defense 3 games 1W 1D 1L
Fianchetto Variation 3 games 1W 1D 1L
Check Variation, Intermezzo Line
2 games
0W
1D
1L
Nimzowitsch Variation
1 game
1W
0D
0L
Queen's Pawn Game 3 games 2W 0D 1L
Colle System 2 games 1W 0D 1L
(unspecified)
2 games
1W
0D
1L
London System 1 game 1W 0D 0L
with e6
1 game
1W
0D
0L
Indian Defense 1 game 1W 0D 0L
Knights Variation 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Scotch Game 1 game 0W 1D 0L
Mieses Variation 1 game 0W 1D 0L
(unspecified)
1 game
0W
1D
0L
Bird Opening 1 game 1W 0D 0L
Dutch Variation 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Queen's Gambit Declined 1 game 0W 1D 0L
Exchange Variation 1 game 0W 1D 0L
(unspecified)
1 game
0W
1D
0L
Hungarian Opening 1 game 0W 1D 0L
(unspecified) 1 game 0W 1D 0L
(unspecified)
1 game
0W
1D
0L
Blunders Top 4 of 321
This player's costliest moves in analyzed games. Can you find the winning move?
Games Showing all 71 games
| Date | Event | Round | Color | Opponent | Result | Accuracy % | First moves |
|---|---|---|---|---|---|---|---|
| 2026.04.04 | Runde 9: Roth, Jonas - Yakovenko, Oleg | 9.3 | 2026.04.04 Roth, Jonas (34623515) (2051) | 1 | 92.90% | 1. d4 Nf6 2. Nf3 e6 3. h3 c5 | |
| 2026.04.03 | Runde 8: Yakovenko, Oleg - Mueller, Markus | 8.4 | 2026.04.03 Mueller, Markus (4646576) (2038) | 1 | 96.00% | 1. Nf3 d6 2. d4 Nf6 3. c4 g6 | |
| 2026.04.03 | Runde 7: Junker, Reiner - Yakovenko, Oleg | 7.2 | 2026.04.03 Junker, Reiner (4655451) (2214) | 1 | 91.80% | 1. c4 Nf6 2. Nc3 e5 3. Nf3 Nc6 | |
| 2026.04.02 | Runde 6: Yakovenko, Oleg - Bold, Andre | 6.5 | 2026.04.02 Bold, Andre (16208471) (2235) | ½ | 97.60% | 1. Nf3 d5 2. e3 Nf6 3. c4 c6 | |
| 2026.03.29 | Runde 4: Heider, Martin - Yakovenko, Oleg | 4.5 | 2026.03.29 Heider, Martin (24668389) (2395) | 0 | 91.40% | 1. Nf3 Nf6 2. b3 d5 3. Bb2 c5 | |
| 2026.03.29 | Runde 3: Yakovenko, Oleg - Musiolik, David | 3.2 | 2026.03.29 Musiolik, David (12972355) (2261) | ½ | 97.80% | 1. Nf3 Nf6 2. c4 b6 3. d4 Bb7 | |
| 2026.03.28 | Runde 2: Syrov, Arkadi - Yakovenko, Oleg | 2.4 | 2026.03.28 Syrov, Arkadi (12942448) (2334) | ½ | 96.10% | 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 | |
| 2026.03.27 | Runde 5: Yakovenko, Oleg - Ollenberger, Roland | 5.1 | 2026.03.27 Ollenberger, Roland (24608440) (2168) | ½ | 94.10% | 1. Nf3 Nf6 2. c4 e6 3. Nc3 d5 | |
| 2026.03.27 | Runde 1: Yakovenko, Oleg - Huschens, Matthias | 1.3 | 2026.03.27 Huschens, Matthias (12952869) (2094) | ½ | - | 1. Nf3 d5 2. d4 Nf6 3. c4 c6 | |
| 2025.06.15 | Round 9: Nechitaylo, Nikita - Yakovenko, Oleg | 9.8 | 2025.06.15 Nechitaylo, Nikita (34138161) (2276) | ½ | 96.10% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | |
| 2025.06.15 | Round 8: Yakovenko, Oleg - Gruenter, Martin | 8.12 | 2025.06.15 Gruenter, Martin (24640352) (2213) | 1 | 95.20% | 1. Nf3 Nf6 2. c4 c5 3. d4 cxd4 | |
| 2025.06.15 | Round 7: Gloeckler, Christian - Yakovenko, Oleg | 7.10 | 2025.06.15 Gloeckler, Christian (34608966) (2353) | 0 | 89.00% | 1. e4 c5 2. Nf3 d6 3. d4 cxd4 | |
| 2025.06.15 | Round 6: Yakovenko, Oleg - Fuhlrott, Tim | 6.15 | 2025.06.15 Fuhlrott, Tim (16222431) | 1 | 98.00% | 1. Nf3 d5 2. d4 Nf6 3. c4 e6 | |
| 2025.06.14 | Round 5: Yakovenko, Oleg - Grafl, Florian, Dr. | 5.9 | 2025.06.14 Grafl, Florian, Dr. (4645715) (2351) | 0 | 84.60% | 1. Nf3 f5 2. d4 Nf6 3. g3 g6 | |
| 2025.06.14 | Round 4: Hartge, Gedeon - Yakovenko, Oleg | 4.9 | 2025.06.14 Hartge, Gedeon (12932116) (2279) | ½ | 83.20% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | |
| 2025.06.14 | Round 3: Ochs, Daniel Elias - Yakovenko, Oleg | 3.10 | 2025.06.14 Ochs, Daniel Elias (16226160) (2319) | ½ | 93.30% | 1. d4 Nf6 2. Nf3 e6 3. c4 b6 | |
| 2025.06.14 | Round 2: Yakovenko, Oleg - Meuer, David | 2.15 | 2025.06.14 Meuer, David (16262964) (2066) | 1 | 99.00% | 1. Nf3 d5 2. d4 Nf6 3. c4 e6 | |
| 2025.06.14 | Round 1: Winterberg, Lukas - Yakovenko, Oleg | 1.3 | 2025.06.14 Winterberg, Lukas (24622702) (2374) | 0 | 90.20% | 1. d4 Nf6 2. Nf3 e6 3. c4 b6 | |
| 2024.05.05 | RLP-Einzelblitzmeisterschaften Landau 2024 | 29 | 2024.05.05 Karsay, Pascal (12953474) (2337) | 1 | 94.70% | 1. Nf3 Nf6 2. c4 e6 3. d4 d5 | |
| 2024.05.05 | RLP-Einzelblitzmeisterschaften Landau 2024 | 27 | 2024.05.05 Zwick, Jonas (1270951) (2014) | 1 | 99.20% | 1. Nf3 d5 2. d4 c6 3. c4 Nf6 | |
| 2024.05.05 | RLP-Einzelblitzmeisterschaften Landau 2024 | 25 | 2024.05.05 Roth, Jonas (34623515) | 1 | 92.30% | 1. Nf3 d5 2. d4 c6 3. c4 dxc4 | |
| 2024.05.05 | RLP-Einzelblitzmeisterschaften Landau 2024 | 23 | 2024.05.05 Barzen, Pascal (24653497) (2360) | 0 | 88.70% | 1. Nf3 Nf6 2. c4 e6 3. d4 b6 | |
| 2024.05.05 | RLP-Einzelblitzmeisterschaften Landau 2024 | 21 | 2024.05.05 Carow, Johannes, Dr. (24692050) (2507) | ½ | 96.30% | 1. Nf3 Nf6 2. c4 g6 3. Nc3 d5 | |
| 2024.05.05 | RLP-Einzelblitzmeisterschaften Landau 2024 | 19 | 2024.05.05 Gauer, Manuel (1270058) (1972) | ½ | 92.90% | 1. Nf3 d5 2. d4 Nf6 3. c4 c6 | |
| 2024.05.05 | RLP-Einzelblitzmeisterschaften Landau 2024 | 17 | 2024.05.05 Lebzak, Jaroslaw (44105851) (2085) | 0 | 81.00% | 1. Nf3 d5 2. d4 Nf6 3. c4 e6 | |
| 2024.05.05 | RLP-Einzelblitzmeisterschaften Landau 2024 | 16 | 2024.05.05 Lang, Torsten (4619315) (2292) | 1 | 92.70% | 1. d4 Nf6 2. Nf3 e6 3. Bf4 d5 | |
| 2024.05.05 | RLP-Einzelblitzmeisterschaften Landau 2024 | 14 | 2024.05.05 Sascha Falahat | 1 | 84.40% | 1. f4 d5 2. e3 Nf6 3. b3 g6 | |
| 2024.05.05 | RLP-Einzelblitzmeisterschaften Landau 2024 | 12 | 2024.05.05 Huschens, Matthias (12952869) (2072) | ½ | 77.20% | 1. Nf3 Nf6 2. c4 e6 3. Nc3 d5 | |
| 2024.05.05 | RLP-Einzelblitzmeisterschaften Landau 2024 | 10 | 2024.05.05 Muellen, Juergen (4640470) | 0 | 90.60% | 1. e4 c5 2. f4 d5 3. e5 Nc6 | |
| 2024.05.05 | RLP-Einzelblitzmeisterschaften Landau 2024 | 8 | 2024.05.05 Gypser, Andreas, Dr. (4659392) | 0 | 76.50% | 1. e4 c5 2. Nf3 d6 3. d4 cxd4 | |
| 2024.05.05 | RLP-Einzelblitzmeisterschaften Landau 2024 | 6 | 2024.05.05 Grzeca, Pascal (24600741) (2116) | 1 | 92.90% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | |
| 2024.05.05 | RLP-Einzelblitzmeisterschaften Landau 2024 | 4 | 2024.05.05 Mueller, Lutz (4660579) (2002) | 1 | 99.20% | 1. d4 Nf6 2. Nf3 e6 3. e3 d5 | |
| 2024.05.05 | RLP-Einzelblitzmeisterschaften Landau 2024 | 2 | 2024.05.05 Vogel, Johannes (24640115) (2103) | 1 | 95.80% | 1. e4 c5 2. Nf3 d6 3. d4 cxd4 | |
| 2024.05.04 | RLP-Schnellschachmeisterschaften Landau 2024 | 7 | 2024.05.04 Lang, Torsten (4619315) (2256) | ½ | 88.30% | 1. Nf3 d5 2. d4 e6 3. c4 c6 | |
| 2024.05.04 | RLP-Schnellschachmeisterschaften Landau 2024 | 5 | 2024.05.04 Louis, Volker (4627555) (2048) | 0 | 87.40% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | |
| 2024.05.04 | RLP-Schnellschachmeisterschaften Landau 2024 | 4 | 2024.05.04 Perske, Paul (16234537) (2049) | 1 | 93.00% | 1. Nf3 Nf6 2. c4 g6 3. Nc3 c5 | |
| 2024.05.04 | RLP-Schnellschachmeisterschaften Landau 2024 | 3 | 2024.05.04 Meuer, David (16262964) | 0 | 86.80% | 1. e4 c5 2. Nf3 d6 3. d4 cxd4 | |
| 2024.05.04 | RLP-Schnellschachmeisterschaften Landau 2024 | 2 | 2024.05.04 Bender, Tim (16278135) | 0 | 84.10% | 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 | |
| 2024.03.30 | Runde 9: Syrov, Arkadi - Yakovenko, Oleg | 2024.03.30 Syrov, Arkadi (12942448) (2292) | ½ | 98.90% | 1. e4 c5 2. Nf3 d6 3. d4 cxd4 | ||
| 2024.03.29 | Runde 8: Yakovenko, Oleg - Ollenberger, Roland | 2024.03.29 Ollenberger, Roland (24608440) (2282) | 0 | 84.70% | 1. Nf3 g6 2. e4 c5 3. c4 Nc6 | ||
| 2024.03.29 | Runde 7: Wacker, Felix - Yakovenko, Oleg | 2024.03.29 Wacker, Felix (12953040) (1995) | 1 | 98.00% | 1. e4 c5 2. Nf3 d6 3. d4 cxd4 | ||
| 2024.03.28 | Runde 6: Yakovenko, Oleg - Commercon, Simon | 2024.03.28 Commercon, Simon (24620998) (2200) | 1 | 98.10% | 1. Nf3 d5 2. d4 Nf6 3. c4 e6 | ||
| 2024.03.28 | Runde 5: Bold, Andre - Yakovenko, Oleg | 2024.03.28 Bold, Andre (16208471) (2218) | 0 | 91.40% | 1. d4 Nf6 2. Nf3 e6 3. e3 d5 | ||
| 2024.03.24 | Runde 4: Yakovenko, Oleg - Junker, Reiner | 2024.03.24 Junker, Reiner (4655451) (2238) | 1 | 98.30% | 1. Nf3 f5 2. d4 Nf6 3. g3 e6 | ||
| 2024.03.24 | Runde 3: Karsay, Pascal - Yakovenko, Oleg | 2024.03.24 Karsay, Pascal (12953474) (2345) | 1 | 83.10% | 1. d4 Nf6 2. c4 e6 3. Nf3 b6 | ||
| 2024.03.23 | Runde 2: Yakovenko, Oleg - Weller, Manuel | 2024.03.23 Weller, Manuel (24635952) (2247) | ½ | 85.40% | 1. Nf3 g6 2. e4 c5 3. c4 Bg7 | ||
| 2024.03.22 | Runde 1: Yakovenko, Oleg - Roelle, Philipp | 2024.03.22 Roelle, Philipp (12984272) (2123) | ½ | 86.60% | 1. d4 e6 2. c4 Bb4+ 3. Nd2 Nf6 | ||
| 2025.04.19 | Runde 9: Oleg Yakovenko - Syrov, Arkadi | 9.5 | 2025.04.19 Syrov, Arkadi (12942448) (2340) | ½ | 98.50% | 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 | |
| 2025.04.18 | Runde 8: Ahad Hüseynov - Oleg Yakovenko | 8.1 | 2025.04.18 Ahad Hüseynov | 0 | 90.10% | 1. e4 c5 2. Nf3 d6 3. d3 g6 | |
| 2025.04.18 | Runde 7: Diehl, Holger - Oleg Yakovenko | 7.5 | 2025.04.18 Diehl, Holger (533036837) | 1 | 92.60% | 1. c4 e5 2. g3 Nf6 3. Bg2 d5 | |
| 2025.04.17 | Runde 6: Oleg Yakovenko - Roelle, Philipp | 6.2 | 2025.04.17 Roelle, Philipp (12984272) (2119) | 1 | 94.10% | 1. Nf3 b5 2. e4 a6 3. d4 Bb7 | |
| 2025.04.17 | Runde 5: Weller, Manuel - Oleg Yakovenko | 5.4 | 2025.04.17 Weller, Manuel (24635952) (2229) | 0 | 87.60% | 1. c4 e5 2. g3 Nf6 3. Bg2 d5 | |
| 2025.04.13 | Runde 4: Oleg Yakovenko - Commercon, Simon | 4.3 | 2025.04.13 Commercon, Simon (24620998) (2201) | 1 | - | 1. Nf3 d5 2. d4 Nf6 3. c4 e6 | |
| 2025.04.13 | Runde 3: Ollenberger, Roland - Oleg Yakovenko | 3.3 | 2025.04.13 Ollenberger, Roland (24608440) (2190) | 0 | - | 1. e4 c5 2. Nc3 d6 3. d4 cxd4 | |
| 2025.04.12 | Runde 2: Oleg Yakovenko - Bold, Andre | 2.4 | 2025.04.12 Bold, Andre (16208471) (2216) | ½ | - | 1. d4 d5 2. c4 c6 3. Nf3 Nf6 | |
| 2025.04.11 | Runde 1: Junker, Reiner - Oleg Yakovenko | 1.3 | 2025.04.11 Junker, Reiner (4655451) (2217) | ½ | - | 1. g3 e5 2. Bg2 d5 3. d3 Nf6 | |
| 2023.06.25 | Round 18: Oleg Yakovenko - Christoph Roos | 2023.06.25 Christoph Roos | 0 | 77.50% | 1. Nf3 d5 2. d4 Nf6 3. c4 c6 | ||
| 2023.06.25 | Round 16: Oleg Yakovenko - Andreas Haasler | 2023.06.25 Andreas Haasler | 1 | 79.60% | 1. e4 c5 2. Nc3 d6 3. g3 g6 | ||
| 2023.06.25 | Round 15: Rick Frischmann - Oleg Yakovenko | 2023.06.25 Rick Frischmann | 0 | 84.40% | 1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 | ||
| 2023.06.25 | Round 14: Oleg Yakovenko - Lukas Winterberg | 2023.06.25 Lukas Winterberg | 0 | 90.50% | 1. Nf3 Nf6 2. c4 e6 3. d4 d5 | ||
| 2023.06.25 | Round 13: Martin Bauer - Oleg Yakovenko | 2023.06.25 Martin Bauer | 1 | 96.20% | 1. d4 Nf6 2. Bf4 e6 3. e3 d5 | ||
| 2023.06.25 | Round 12: Oleg Yakovenko - Pascal Barzen | 2023.06.25 Pascal Barzen | ½ | 90.00% | 1. Nf3 Nf6 2. c4 e6 3. d4 b6 | ||
| 2023.06.25 | Round 11: Michael Schenderowitsch - Oleg Yakovenko | 2023.06.25 Michael Schenderowitsch | ½ | 87.90% | 1. Nf3 Nf6 2. c4 e6 3. Nc3 d5 | ||
| 2023.06.25 | Round 9: Christian Fink - Oleg Yakovenko | 2023.06.25 Christian Fink | 0 | 85.10% | 1. b3 e5 2. Bb2 Nc6 3. e4 Nf6 | ||
| 2023.06.25 | Round 7: Karl-Jasmin Muranyi - Oleg Yakovenko | 2023.06.25 Karl-Jasmin Muranyi | ½ | 99.80% | 1. d4 Nf6 2. c3 e6 3. Bf4 d5 | ||
| 2023.06.25 | Round 5: Roland Ollenberger - Oleg Yakovenko | 2023.06.25 Roland Ollenberger | 0 | 84.50% | 1. e4 c5 2. Nf3 d6 3. d4 cxd4 | ||
| 2023.06.25 | Round 3: Oleg Yakovenko - Torsten Lang | 2023.06.25 Torsten Lang | ½ | 92.80% | 1. Nf3 g6 2. e4 Bg7 3. c4 c6 | ||
| 2023.06.25 | Round 1: Oleg Yakovenko - Matthias Huschens | 2023.06.25 Matthias Huschens | 1 | 90.60% | 1. Nf3 d5 2. d4 Nf6 3. c4 c6 | ||
| 2023.06.24 | Round 7: Oleg Yakovenko - Matthias Huschens | 2023.06.24 Matthias Huschens | ½ | 88.20% | 1. Nf3 d5 2. e3 Nf6 3. c4 e6 | ||
| 2023.06.24 | Round 4: Paul Perske - Oleg Yakovenko | 2023.06.24 Paul Perske | 0 | 87.30% | 1. e4 c5 2. Nf3 d6 3. d4 cxd4 | ||
| 2023.06.24 | Round 3: Oleg Yakovenko - Torsten Lang | 2023.06.24 Torsten Lang | 1 | 92.70% | 1. Nf3 g6 2. e4 c5 3. d4 cxd4 |