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London System · As White · updated October 2026

Play the London System like Jan-Krzysztof Duda

A repertoire in the London System built from 94 of Jan-Krzysztof Duda's public Chess.com blitz games. At every position you play the move Jan-Krzysztof Duda chose most often. Where Jan-Krzysztof Duda 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 Jan-Krzysztof Duda or Chess.com.

  • Jan-Krzysztof Duda was #9 in Chess.com blitz in October 2026 (3,296) and scored 82% against opponents averaging 3,010 in these games.
  • You play Jan-Krzysztof Duda's own move in 19 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.

Next: line 1

Free · first 5 lines need no account

Blitz rank

#9

Chess.com

Rating

3,296

Games

94

in this opening

Score

82%

in these games

Opponents

3,010

average rating

More about Jan-Krzysztof Duda

Use arrow keys to navigate the board. Press Enter to select a piece, then use arrow keys and Enter to move. Press Escape to cancel a move.
Line 1 after 12 moves

Lines to learn

  1. Line 1 · 10% at top level

    1…d5 2.Nf3 Nf6 3.Bf4 c5 4.e3 Nc6 5.c3 Qb6 6.Qc2 g6 7.Bd3

    Next

  2. Line 2 · 10% at top level

    1…Nf6 2.Nf3 e6 3.Bf4 b6 4.e3 Bb7 5.h3 Bd6 6.Bxd6 cxd6 7.Be2 d5 8.c4

    New

  3. Line 3 · 5% at top level

    1…Nf6 2.Nf3 e6 3.Bf4 c5 4.e3

    New

  4. Line 4 · 4% at top level

    1…d5 2.Nf3 Nf6 3.Bf4 Bf5 4.c4 e6 5.Nc3 Bb4 6.e3

    New

  5. Line 5 · 3% at top level

    1…Nf6 2.Nf3 d5 3.Bf4 c5 4.e3 e6 5.c3 Bd6 6.Bb5+

    New

  6. Line 6 · 3% at top level

    1…Nf6 2.Nf3 d5 3.Bf4 c6 4.e3

    New

  7. Line 7 · 3% at top level

    1…d5 2.Nf3 Nf6 3.Bf4 c5 4.e3 Nc6 5.c3 Qb6 6.Qc2 Nh5 7.dxc5

    New

  8. Line 8 · 3% at top level

    1…Nf6 2.Nf3 e6 3.Bf4 b6 4.e3 Bb7 5.h3 g6 6.c4

    New

  9. Line 9 · 3% at top level

    1…e6 2.Nf3 Nf6 3.Bf4 b6 4.e3 Bb7 5.h3

    New

  10. Line 10 · 3% at top level

    1…Nf6 2.Nf3 d5 3.Bf4 c5 4.e3 Nc6 5.c3 Qb6 6.Qc2 g6 7.Bd3

    New

  11. Line 11 · 3% at top level

    1…d5 2.Nf3 e6 3.Bf4 c5 4.e3

    New

  12. Line 12 · 3% at top level

    1…Nf6 2.Nf3 d5 3.Bf4 c5 4.e3 Nc6 5.c3 Nh5 6.dxc5

    New

  13. Line 13 · 3% at top level

    1…Nf6 2.Nf3 d5 3.Bf4 c5 4.e3 Nc6 5.c3 e6 6.Nbd2 Bd6 7.Bg3 O-O 8.Bd3 b6 9.e4

    New

  14. Line 14 · 2% at top level

    1…d5 2.Nf3 Nf6 3.Bf4 e6 4.e3 c5 5.c3 Nc6 6.Nbd2

    New

  15. Line 15 · 2% at top level

    1…Nf6 2.Nf3 e6 3.Bf4 d5 4.e3 c5 5.c3 Nc6 6.Nbd2

    New

  16. Line 16 · 2% at top level

    1…Nf6 2.Nf3 e6 3.Bf4 d5 4.e3 Bd6 5.Nbd2 O-O 6.Bd3

    New

  17. Line 17 · 2% at top level

    1…d5 2.Nf3 Nf6 3.Bf4 c5 4.e3 Nc6 5.c3 cxd4 6.exd4

    New

  18. Line 18 · 2% at top level

    1…d5 2.Nf3 Nf6 3.Bf4 c5 4.e3 Nc6 5.c3 e6 6.Nbd2

    New

  19. Line 19 · 2% at top level

    1…Nf6 2.Nf3 e6 3.Bf4 b6 4.e3 Bb7 5.h3 Be7 6.Nbd2 O-O 7.Bd3 c5 8.c3 Nc6 9.O-O Rc8 10.Re1

    New

  20. Line 20 · 2% at top level

    1…Nf6 2.Nf3 e6 3.Bf4 b6 4.e3 Bb7 5.h3 Be7 6.Nbd2 O-O 7.Bd3 c5 8.c3 Nc6 9.O-O cxd4 10.exd4

    New

Ordered by how often they come up in top-level games. Learned lines join your daily review.

Jan-Krzysztof Duda's main line in the London System, move by move

The most common line at top level: 1…d5 2.Nf3 Nf6 3.Bf4 c5 4.e3 Nc6 5.c3 Qb6 6.Qc2 g6 7.Bd3.

  1. 1…d5 Reply · Jan-Krzysztof Duda's games A common reply here is 1…d5. At top level, this comes up about 36% of the time.
  2. 2.Nf3 Your move · Jan-Krzysztof Duda's games Jan-Krzysztof Duda played 2.Nf3 in 25 games, scoring 78%.
  3. 2…Nf6 Reply · Jan-Krzysztof Duda's games A common reply here is 2…Nf6. At top level, this comes up about 30% of the time.
  4. 3.Bf4 Your move · Jan-Krzysztof Duda's games Jan-Krzysztof Duda played 3.Bf4 in 21 games, scoring 74%.
  5. 3…c5 Reply · Jan-Krzysztof Duda's games A common reply here is 3…c5. At top level, this comes up about 19% of the time.
  6. 4.e3 Your move · Jan-Krzysztof Duda's games Jan-Krzysztof Duda played 4.e3 in 12 games, scoring 79%.
  7. 4…Nc6 Reply · Jan-Krzysztof Duda's games A common reply here is 4…Nc6. At top level, this comes up about 17% of the time.
  8. 5.c3 Your move · Jan-Krzysztof Duda's games Jan-Krzysztof Duda played 5.c3 in 8 games, scoring 81%.
  9. 5…Qb6 Reply · Jan-Krzysztof Duda's games A common reply here is 5…Qb6. At top level, this comes up about 13% of the time.
  10. 6.Qc2 Your move · Jan-Krzysztof Duda's games Jan-Krzysztof Duda played 6.Qc2 in 4 games, scoring 100%.
  11. 6…g6 Reply · Jan-Krzysztof Duda's games A common reply here is 6…g6. At top level, this comes up about 10% of the time.
  12. 7.Bd3 Your move · Jan-Krzysztof Duda's games Jan-Krzysztof Duda played 7.Bd3 in 2 games, scoring 100%.

Questions about this course

How does Jan-Krzysztof Duda play the London System?
After 1.d4, Jan-Krzysztof Duda's most common line is 1…d5 2.Nf3 Nf6 3.Bf4 c5 4.e3 Nc6 5.c3 Qb6 6.Qc2 g6 7.Bd3. At top level it comes up about 10% of the time.
Is this Jan-Krzysztof Duda's course?
No. ChessDrills builds it automatically from Jan-Krzysztof Duda's public Chess.com blitz games.
What is this London System course based on?
94 of Jan-Krzysztof Duda's Chess.com blitz games in the London System as White, against opponents with an average rating of 3,010. Jan-Krzysztof Duda scored 82% in them.
How many lines does the course have?
20 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 Jan-Krzysztof Duda?
GM Jan-Krzysztof Duda was ranked number 9 on the Chess.com blitz leaderboard with a rating of 3,296 when this course was built.

More openings to play like Jan-Krzysztof Duda

Play the London System like other top players