English Opening: Jaenisch Gambit

1. c4 b5

English Opening: Jaenisch Gambit after 1. c4 b5 87654321abcdefgh

The English Opening: Jaenisch Gambit is a chess opening classified as ECO A10, reached after 1. c4 b5. It is a line of the English Opening. White is to move.

In 12.6 million rated Lichess games (blitz and slower), this position was reached 1,081 times by this move order. White won 53%, 5% were drawn and Black won 42%. The most popular continuation is 2. cxb5 (60% of games).

Engine evaluation: +0.74 (Stockfish, depth 52; best line 2. cxb5 a6 3. e3 e5 4. Nf3 e4)

ECO
A10
Moves
2 plies
FEN
rnbqkbnr/p1pppppp/8/1p6/2P5/8/PP1PPPPP/RNBQKBNR w KQkq - 0 2
PGN
1. c4 b5

Analyse with Stockfish · Board image (SVG) · Open on Lichess

Results by rating

Average ratingGamesWhite / draw / Black
0-149925054%43%
1500-199958751%44%
2000+24457%37%
All1,08153%42%

Most played moves

MoveGamesWhite / draw / Black
2. cxb5650 (60%)55%39%
2. e3101 (9%)53%44%
2. Nc396 (9%)53%45%
2. c552 (5%)46%52%
2. e449 (5%)55%41%
2. b349 (5%)49%43%
2. g330 (3%)40%57%
2. d319 (2%)32%68%

Master games

99 over-the-board games are classified under this line (White 56%, draw 9%, Black 35%). The strongest:

Search all games of the English Opening: Jaenisch Gambit and its sub-variations

Highest-rated Lichess games

Comes from

English Opening 1. c4

More English Opening lines (all)

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.