Nimzowitsch Defense: Colorado Countergambit Accepted
1. e4 Nc6 2. Nf3 f5 3. exf5
The Nimzowitsch Defense: Colorado Countergambit Accepted is a chess opening classified as ECO B00, reached after 1. e4 Nc6 2. Nf3 f5 3. exf5. It is a line of the Nimzowitsch Defense. Black is to move.
In 12.6 million rated Lichess games (blitz and slower), this position was reached 1,150 times by this move order. White won 48%, 3% were drawn and Black won 49%. The most popular continuation is 3… d5 (86% of games).
Engine evaluation: +0.94 (Stockfish, depth 38; best line 3… d5 4. Bb5 Bxf5 5. Ne5 Bd7 6. Bxc6)
- ECO
- B00
- Moves
- 5 plies
- FEN
r1bqkbnr/ppppp1pp/2n5/5P2/8/5N2/PPPP1PPP/RNBQKB1R b KQkq - 0 3- PGN
1. e4 Nc6 2. Nf3 f5 3. exf5
Analyse with Stockfish · Board image (SVG) · Open on Lichess
Results by rating
| Average rating | Games | White / draw / Black |
|---|---|---|
| 0-1499 | 224 | |
| 1500-1999 | 629 | |
| 2000+ | 297 | |
| All | 1,150 |
Most played moves
| Move | Games | White / draw / Black |
|---|---|---|
| 3… d5 | 986 (86%) | |
| 3… Nf6 | 88 (8%) | |
| 3… d6 | 50 (4%) | |
| 3… Nh6 | 10 (1%) | |
| 3… e5 | 6 (1%) | |
| 3… g6 | 4 (0%) | |
| 3… e6 | 3 (0%) | |
| 3… Ne5 | 1 (0%) |
Master games
288 over-the-board games are classified under this line (White 53%, draw 12%, Black 35%). The strongest:
- GM Samuel Sevian (2688) – GM Magnus Carlsen (2840) 1-0 · Titled Tue 17th Feb 2026 · 2026-02-17
- GM Dmitrij Kollars (2618) – GM Magnus Carlsen (2835) 0-1 · Titled Tue 25th Jul Late · 2023-07-25
- GM Olexandr Bortnyk (2607) – GM Magnus Carlsen (2835) 0-1 · Titled Tue 25th Jul Late · 2023-07-25
- GM Sergei Zhigalko (2572) – GM Magnus Carlsen (2840) 0-1 · 2nd 3-0 Thu 15th Jan 2026 · 2026-01-15
- GM Etienne Bacrot (2640) – GM Jeffery Xiong (2636) 0-1 · Titled Tue 4th Feb Early · 2025-02-04
Search all games of the Nimzowitsch Defense: Colorado Countergambit Accepted and its sub-variations
Highest-rated Lichess games
- suyijia2004 (2718) – Rookz77 (2664) 1-0 · 2026-09-01 · 180 + 0s
- Meatloaf927 (2689) – Rookz77 (2657) 1-0 · 2026-09-01 · 180 + 0s
- GeForceExperience (2608) – Rookz77 (2690) 0-1 · 2026-09-01 · 180 + 0s
Comes from
Nimzowitsch Defense: Colorado Countergambit 1. e4 Nc6 2. Nf3 f5
More Nimzowitsch Defense lines (all)
- Nimzowitsch Defense (1. e4 Nc6) B00
- Nimzowitsch Defense (1… Nc6 2. d4) B00
- Nimzowitsch Defense: Breyer Variation B00
- Nimzowitsch Defense: Declined Variation B00
- Nimzowitsch Defense: El Columpio Defense B00
- Nimzowitsch Defense: El Columpio Defense, El Columpio Gambit B00
- Nimzowitsch Defense: El Columpio Defense, Exchange Variation B00
- Nimzowitsch Defense: El Columpio Defense, Pin Variation B00
- Nimzowitsch Defense: Franco-Nimzowitsch Variation B00
- Nimzowitsch Defense: French Connection B00
- Nimzowitsch Defense: Hornung Gambit B00
- Nimzowitsch Defense: Kennedy Variation B00
Opening names and moves from the Lichess openings dataset; statistics from the Lichess open database, 2026-09 (CC0), sample of 12.6 million games, bots excluded; evaluations from Lichess cloud analysis (all CC0). Master games from The Week in Chess #920–#1664 by Mark Crowther, used with permission.