London System · As White · updated October 2026
Play the London System like Sam Sevian
A repertoire in the London System built from 37 of Sam Sevian's public Chess.com blitz games. At every position you play the move Sam Sevian chose most often. Where Sam Sevian has fewer than 3 games, the course takes the other top-50 players' most played move, then Stockfish's. Learn a line on the board, then each position comes back in a short daily review until it sticks.
Not affiliated with or endorsed by Sam Sevian or Chess.com.
- Sam Sevian was #24 in Chess.com blitz in October 2026 (3,241) and scored 69% against opponents averaging 2,990 in these games.
- You play Sam Sevian's own move in 9 of 40 positions.
- The whole course is free, and it is updated monthly.
Train lines
Learn a new line move by move. Lines due for review go to your daily review first.
Free · first 5 lines need no account
Blitz rank
#24
Chess.com
Rating
3,241
Games
37
in this opening
Score
69%
in these games
Opponents
2,990
average rating
Lines to learn
- Next
Line 1 · 36% at top level
1…Nf6 2.Nf3 g6 3.Bf4 Bg7 4.e3 O-O 5.h3 d6 6.c4
- New
Line 2 · 5% at top level
1…Nf6 2.Nf3 c6 3.Bf4
- New
Line 3 · 5% at top level
1…Nf6 2.Nf3 g6 3.Bf4 d6 4.h3 Bg7 5.e3 O-O 6.c4
- New
Line 4 · 4% at top level
1…d5 2.Nf3 Nf6 3.Bf4 c5 4.e3 cxd4 5.exd4 Bf5 6.Ne5
- New
Line 5 · 4% at top level
1…d5 2.Nf3 Nf6 3.Bf4 c5 4.e3 cxd4 5.exd4 Nc6 6.c3 Bf5 7.Nbd2 e6 8.Nh4 Bg4 9.Nhf3
- New
Line 6 · 4% at top level
1…d5 2.Nf3 Nf6 3.Bf4 c5 4.e3 cxd4 5.exd4 a6 6.c4
- New
Line 7 · 4% at top level
1…Nf6 2.Nf3 e6 3.Bf4 b6 4.e3 Bb7 5.Bd3
- New
Line 8 · 3% at top level
1…Nf6 2.Nf3 e6 3.Bf4 c5 4.e3
- New
Line 9 · 2% at top level
1…d5 2.Nf3 Nf6 3.Bf4 Bf5 4.c4 e6 5.Qb3 Nc6 6.Nbd2
- New
Line 10 · 2% at top level
1…Nf6 2.Nf3 d5 3.Bf4 c5 4.e3 Nc6 5.Nbd2 cxd4 6.exd4
- New
Line 11 · 2% at top level
1…d5 2.Nf3 Nf6 3.Bf4 e6 4.e3 Bd6 5.Nbd2 O-O 6.Bd3
- New
Line 12 · 2% at top level
1…d5 2.Nf3 Nf6 3.Bf4 c5 4.e3 Nc6 5.Nbd2 cxd4 6.exd4
- New
Line 13 · 2% at top level
1…Nf6 2.Nf3 d5 3.Bf4 e6 4.e3
- New
Line 14 · 2% at top level
1…Nf6 2.Nf3 e6 3.Bf4 d5 4.e3 Bd6 5.Nbd2
- New
Line 15 · 2% at top level
1…e6 2.Nf3 Nf6 3.Bf4
- New
Line 16 · 1% at top level
1…d5 2.Nf3 Nf6 3.Bf4 c5 4.e3 Nc6 5.Nbd2 Bg4 6.c3 e6 7.Qb3 Qc8 8.h3 Bh5 9.Ne5 Nd7 10.g4 Bg6 11.Nxg6 hxg6 12.h4
- New
Line 17 · 1% at top level
1…d5 2.Nf3 Nf6 3.Bf4 c5 4.e3 Nc6 5.Nbd2 Bg4 6.c3 e6 7.Qb3 Qc8 8.h3 Bh5 9.Ne5 Nxe5 10.Bxe5
- New
Line 18 · 1% at top level
1…d5 2.Nf3 Nf6 3.Bf4 c5 4.e3 Nc6 5.Nbd2 Qb6 6.dxc5
Ordered by how often they come up in top-level games. Learned lines join your daily review.
Sam Sevian's main line in the London System, move by move
The most common line at top level: 1…Nf6 2.Nf3 g6 3.Bf4 Bg7 4.e3 O-O 5.h3 d6 6.c4.
- 1…Nf6 Reply · Sam Sevian's games A common reply here is 1…Nf6. At top level, this comes up about 68% of the time.
- 2.Nf3 Your move · Sam Sevian's games Sam Sevian played 2.Nf3 in 13 games, scoring 77%.
- 2…g6 Reply · Sam Sevian's games A common reply here is 2…g6. At top level, this comes up about 42% of the time.
- 3.Bf4 Your move · Sam Sevian's games Sam Sevian played 3.Bf4 in 8 games, scoring 81%.
- 3…Bg7 Reply · Sam Sevian's games A common reply here is 3…Bg7. At top level, this comes up about 36% of the time.
- 4.e3 Your move · Sam Sevian's games Sam Sevian played 4.e3 in 4 games, scoring 63%.
- 4…O-O Reply · Sam Sevian's games A common reply here is 4…O-O.
- 5.h3 Your move · Sam Sevian's games Sam Sevian played 5.h3 in 3 games, scoring 67%.
- 5…d6 Reply · Sam Sevian's games A common reply here is 5…d6.
- 6.c4 Your move · Sam Sevian's games Sam Sevian played 6.c4 in 1 game, scoring 100%.
Questions about this course
- How does Sam Sevian play the London System?
- After 1.d4, Sam Sevian's most common line is 1…Nf6 2.Nf3 g6 3.Bf4 Bg7 4.e3 O-O 5.h3 d6 6.c4. At top level it comes up about 36% of the time.
- Is this Sam Sevian's course?
- No. ChessDrills builds it automatically from Sam Sevian's public Chess.com blitz games.
- What is this London System course based on?
- 37 of Sam Sevian's Chess.com blitz games in the London System as White, against opponents with an average rating of 2,990. Sam Sevian scored 69% in them.
- How many lines does the course have?
- 18 lines covering 40 positions, ordered by how often they come up in top-level games. The first 5 lines need no account; saving your progress with an email unlocks the rest, free.
- Who is Sam Sevian?
- GM Sam Sevian was ranked number 24 on the Chess.com blitz leaderboard with a rating of 3,241 when this course was built.