♟chessinsights

Openings — cross-tournament clusters

Every game in the DB replayed up to move 4, then grouped by the position reached. Transpositions across different tournaments and different move orders collapse into the same cluster — something a move-tree viewer like ChessBase cannot do natively.

Cluster at move
3456810
Showing 50 of 868 clusters (capped at 50)·2723 / 2734 games reached move 4
Position at move 4
137games
2 move orders17 tournaments

Seen in: European Individual Chess Championship 2026 | Boards 1-66, German Bundesliga 2025/26, 23rd Bangkok Chess Club Open 2026 | Classical +14 more

Reached via

  • ×1361.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6
  • ×11.Nf3 c5 2.e4 d6 3.d4 cxd4 4.Nxd4 Nf6

Games (137)

Position at move 4
115games
12 tournaments

Seen in: German Bundesliga 2025/26, European Individual Chess Championship 2026 | Boards 1-66, 4NCL Division 1 2025-2026 +9 more

Reached via

  • ×1151.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6

Games (115)

Position at move 4
57games
8 move orders13 tournaments

Seen in: European Individual Chess Championship 2026 | Boards 1-66, 23rd Bangkok Chess Club Open 2026 | Classical, 4NCL Division 1 2025-2026 +10 more

Reached via

  • ×481.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6
  • ×21.d4 Nf6 2.c4 d6 3.Nc3 g6 4.e4 Bg7
  • ×21.d4 Nf6 2.c4 g6 3.Nc3 d6 4.e4 Bg7
  • + 5 other orders

Games (57)

Position at move 4
53games
5 move orders10 tournaments

Seen in: German Bundesliga 2025/26, 4NCL Division 1 2025-2026, European Individual Chess Championship 2026 | Boards 1-66 +7 more

Reached via

  • ×231.d4 d5 2.c4 e6 3.Nc3 Nf6 4.cxd5 exd5
  • ×211.d4 Nf6 2.c4 e6 3.Nc3 d5 4.cxd5 exd5
  • ×71.c4 e6 2.Nc3 d5 3.d4 Nf6 4.cxd5 exd5
  • + 2 other orders

Games (53)

Position at move 4
41games
2 move orders9 tournaments

Seen in: European Individual Chess Championship 2026 | Boards 1-66, German Bundesliga 2025/26, 2026 Chinese Team Chess Championship | Men +6 more

Reached via

  • ×371.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6
  • ×41.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e6

Games (41)

Position at move 4
39games
6 tournaments

Seen in: German Bundesliga 2025/26, European Individual Chess Championship 2026 | Boards 1-66, 4NCL Division 1 2025-2026 +3 more

Reached via

  • ×391.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O

Games (39)

Position at move 4
36games
10 move orders6 tournaments

Seen in: European Individual Chess Championship 2026 | Boards 1-66, German Bundesliga 2025/26, 4NCL Division 1 2025-2026 +3 more

Reached via

  • ×111.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 c6
  • ×71.d4 d5 2.c4 e6 3.Nf3 Nf6 4.Nc3 c6
  • ×61.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 e6
  • + 7 other orders

Games (36)

Position at move 4
35games
8 tournaments

Seen in: German Bundesliga 2025/26, 23rd Bangkok Chess Club Open 2026 | Classical, 4NCL Division 1 2025-2026 +5 more

Reached via

  • ×351.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4

Games (35)

Position at move 4
33games
11 move orders10 tournaments

Seen in: European Individual Chess Championship 2026 | Boards 1-66, German Bundesliga 2025/26, FIDE Candidates 2026: Open +7 more

Reached via

  • ×141.d4 d5 2.c4 e6 3.Nf3 Nf6 4.Nc3 Be7
  • ×61.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Be7
  • ×31.d4 Nf6 2.Nf3 d5 3.c4 e6 4.Nc3 Be7
  • + 8 other orders

Games (33)

Position at move 4
31games
7 move orders6 tournaments

Seen in: German Bundesliga 2025/26, European Individual Chess Championship 2026 | Boards 1-66, 23rd Bangkok Chess Club Open 2026 | Classical +3 more

Reached via

  • ×211.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Bb4
  • ×31.d4 Nf6 2.Nf3 d5 3.c4 e6 4.Nc3 Bb4
  • ×21.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Nf3 d5
  • + 4 other orders

Games (31)

Position at move 4
30games
2 move orders11 tournaments

Seen in: German Bundesliga 2025/26, European Individual Chess Championship 2026 | Boards 1-66, II Rio Chess Masters 2026 (ITT) +8 more

Reached via

  • ×231.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d3 Bc5
  • ×71.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.d3 Nf6

Games (30)

Position at move 4
29games
2 move orders7 tournaments

Seen in: German Bundesliga 2025/26, European Individual Chess Championship 2026 | Boards 1-66, 4NCL Division 1 2025-2026 +4 more

Reached via

  • ×281.e4 e6 2.d4 d5 3.Nc3 Nf6 4.e5 Nfd7
  • ×11.d4 e6 2.e4 d5 3.Nc3 Nf6 4.e5 Nfd7

Games (29)

Position at move 4
27games
9 tournaments

Seen in: German Bundesliga 2025/26, European Individual Chess Championship 2026 | Boards 1-66, 4NCL Division 1 2025-2026 +6 more

Reached via

  • ×271.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6

Games (27)

Position at move 4
25games
9 tournaments

Seen in: European Individual Chess Championship 2026 | Boards 1-66, German Bundesliga 2025/26, 4NCL Division 1 2025-2026 +6 more

Reached via

  • ×251.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6

Games (25)

Position at move 4
25games
6 tournaments

Seen in: German Bundesliga 2025/26, European Individual Chess Championship 2026 | Boards 1-66, 2026 Chinese Team Chess Championship | Men +3 more

Reached via

  • ×251.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4

Games (25)

Position at move 4
24games
6 tournaments

Seen in: European Individual Chess Championship 2026 | Boards 1-66, German Bundesliga 2025/26, 23rd Bangkok Chess Club Open 2026 | Classical +3 more

Reached via

  • ×241.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6

Games (24)

Position at move 4
23games
7 move orders5 tournaments

Seen in: German Bundesliga 2025/26, 4NCL Division 1 2025-2026, European Individual Chess Championship 2026 | Boards 1-66 +2 more

Reached via

  • ×101.d4 d5 2.c4 e6 3.Nf3 Nf6 4.g3 Be7
  • ×41.d4 Nf6 2.c4 e6 3.Nf3 d5 4.g3 Be7
  • ×31.d4 Nf6 2.c4 e6 3.g3 d5 4.Nf3 Be7
  • + 4 other orders

Games (23)

Position at move 4
23games
4 tournaments

Seen in: European Individual Chess Championship 2026 | Boards 1-66, German Bundesliga 2025/26, 4NCL Division 1 2025-2026 +1 more

Reached via

  • ×231.e4 c6 2.d4 d5 3.e5 Bf5 4.Nf3 e6

Games (23)

Position at move 4
22games
4 tournaments

Seen in: European Individual Chess Championship 2026 | Boards 1-66, German Bundesliga 2025/26, 23rd Bangkok Chess Club Open 2026 | Classical +1 more

Reached via

  • ×221.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d3 Be7

Games (22)

Position at move 4
21games
7 tournaments

Seen in: European Individual Chess Championship 2026 | Boards 1-66, German Bundesliga 2025/26, 23rd Bangkok Chess Club Open 2026 | Classical +4 more

Reached via

  • ×211.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6

Games (21)

Position at move 4
20games
2 move orders10 tournaments

Seen in: German Bundesliga 2025/26, 4NCL Division 1 2025-2026, European Individual Chess Championship 2026 | Boards 1-66 +7 more

Reached via

  • ×191.e4 e6 2.d4 d5 3.e5 c5 4.c3 Nc6
  • ×11.e4 c5 2.c3 e6 3.d4 d5 4.e5 Nc6

Games (20)

Position at move 4
19games
6 move orders6 tournaments

Seen in: European Individual Chess Championship 2026 | Boards 1-66, FIDE Candidates 2026: Open, German Bundesliga 2025/26 +3 more

Reached via

  • ×61.c4 e6 2.g3 d5 3.Bg2 Nf6 4.Nf3 Be7
  • ×61.Nf3 Nf6 2.c4 e6 3.g3 d5 4.Bg2 Be7
  • ×31.Nf3 d5 2.c4 e6 3.g3 Nf6 4.Bg2 Be7
  • + 3 other orders

Games (19)

Position at move 4
19games
4 move orders7 tournaments

Seen in: German Bundesliga 2025/26, European Individual Chess Championship 2026 | Boards 1-66, 4NCL Division 1 2025-2026 +4 more

Reached via

  • ×121.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Nbd7
  • ×41.d4 d5 2.c4 e6 3.Nf3 Nf6 4.Nc3 Nbd7
  • ×21.d4 Nf6 2.Nf3 d5 3.c4 e6 4.Nc3 Nbd7
  • + 1 other order

Games (19)

Position at move 4
18games
6 move orders7 tournaments

Seen in: European Individual Chess Championship 2026 | Boards 1-66, German Bundesliga 2025/26, 4NCL Division 1 2025-2026 +4 more

Reached via

  • ×91.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 dxc4
  • ×41.d4 Nf6 2.Nf3 d5 3.c4 e6 4.Nc3 dxc4
  • ×21.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 dxc4
  • + 3 other orders

Games (18)

Position at move 4
18games
3 move orders4 tournaments

Seen in: European Individual Chess Championship 2026 | Boards 1-66, 4NCL Division 1 2025-2026, German Bundesliga 2025/26 +1 more

Reached via

  • ×151.Nf3 d5 2.g3 Nf6 3.Bg2 e6 4.O-O Be7
  • ×21.Nf3 Nf6 2.g3 d5 3.Bg2 e6 4.O-O Be7
  • ×11.Nf3 Nf6 2.g3 e6 3.Bg2 d5 4.O-O Be7

Games (18)

Position at move 4
17games
5 move orders5 tournaments

Seen in: German Bundesliga 2025/26, European Individual Chess Championship 2026 | Boards 1-66, 4NCL Division 1 2025-2026 +2 more

Reached via

  • ×101.d4 Nf6 2.c4 e6 3.Nf3 d5 4.g3 Bb4+
  • ×31.d4 d5 2.c4 e6 3.Nf3 Nf6 4.g3 Bb4+
  • ×21.d4 Nf6 2.Nf3 d5 3.c4 e6 4.g3 Bb4+
  • + 2 other orders

Games (17)

Position at move 4
17games
2 move orders5 tournaments

Seen in: European Individual Chess Championship 2026 | Boards 1-66, German Bundesliga 2025/26, 4NCL Division 1 2025-2026 +2 more

Reached via

  • ×131.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nf6
  • ×41.e4 c6 2.d4 d5 3.Nd2 dxe4 4.Nxe4 Nf6

Games (17)

Position at move 4
16games
6 tournaments

Seen in: European Individual Chess Championship 2026 | Boards 1-66, German Bundesliga 2025/26, 23rd Bangkok Chess Club Open 2026 | Classical +3 more

Reached via

  • ×161.e4 c6 2.d4 d5 3.e5 Bf5 4.h4 h5

Games (16)

Position at move 4
15games
5 tournaments

Seen in: European Individual Chess Championship 2026 | Boards 1-66, German Bundesliga 2025/26, 23rd Bangkok Chess Club Open 2026 | Classical +2 more

Reached via

  • ×151.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 b6

Games (15)

Position at move 4
15games
6 move orders6 tournaments

Seen in: European Individual Chess Championship 2026 | Boards 1-66, FIDE Candidates 2026: Open, German Bundesliga 2025/26 +3 more

Reached via

  • ×61.d4 d5 2.c4 e6 3.Nf3 Nf6 4.Nc3 h6
  • ×41.d4 d5 2.c4 e6 3.Nc3 h6 4.Nf3 Nf6
  • ×21.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 h6
  • + 3 other orders

Games (15)

Position at move 4
14games
3 move orders4 tournaments

Seen in: German Bundesliga 2025/26, European Individual Chess Championship 2026 | Boards 1-66, 2026 Chinese Team Chess Championship | Men +1 more

Reached via

  • ×121.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7
  • ×11.d4 e6 2.c4 b6 3.Nf3 Bb7 4.g3 Nf6
  • ×11.d4 Nf6 2.Nf3 e6 3.c4 b6 4.g3 Bb7

Games (14)

Position at move 4
14games
2 move orders6 tournaments

Seen in: German Bundesliga 2025/26, 4NCL Division 1 2025-2026, European Individual Chess Championship 2026 | Boards 1-66 +3 more

Reached via

  • ×121.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Ba6
  • ×21.d4 Nf6 2.Nf3 e6 3.c4 b6 4.g3 Ba6

Games (14)

Position at move 4
13games
8 tournaments

Seen in: European Individual Chess Championship 2026 | Boards 1-66, 4NCL Division 1 2025-2026, German Bundesliga 2025/26 +5 more

Reached via

  • ×131.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e5

Games (13)

Position at move 4
12games
3 move orders3 tournaments

Seen in: German Bundesliga 2025/26, European Individual Chess Championship 2026 | Boards 1-66, FIDE World Senior Team Championships 2026 - Senior 50+

Reached via

  • ×81.e4 d6 2.d4 Nf6 3.Nc3 e5 4.Nf3 Nbd7
  • ×31.d4 d6 2.e4 Nf6 3.Nc3 e5 4.Nf3 Nbd7
  • ×11.e4 e5 2.Nf3 Nf6 3.Nc3 d6 4.d4 Nbd7

Games (12)

Position at move 4
12games
5 move orders5 tournaments

Seen in: German Bundesliga 2025/26, European Individual Chess Championship 2026 | Boards 1-66, II Rio Chess Masters 2026 (ITT) +2 more

Reached via

  • ×71.d4 Nf6 2.c4 e6 3.Nf3 d5 4.g3 dxc4
  • ×21.d4 d5 2.c4 e6 3.Nf3 Nf6 4.g3 dxc4
  • ×11.d4 Nf6 2.c4 e6 3.g3 d5 4.Nf3 dxc4
  • + 2 other orders

Games (12)

Position at move 4
12games
7 tournaments

Seen in: 4NCL Division 1 2025-2026, European Individual Chess Championship 2026 | Boards 1-66, FIDE World Senior Team Championships 2026 - Senior 50+ +4 more

Reached via

  • ×121.e4 c6 2.d4 d5 3.exd5 cxd5 4.Bd3 Nc6

Games (12)

Position at move 4
12games
6 tournaments

Seen in: TCEC S29 AltSubfi Bonus, European Individual Chess Championship 2026 | Boards 1-66, German Bundesliga 2025/26 +3 more

Reached via

  • ×121.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5

Games (12)

Position at move 4
11games
6 move orders5 tournaments

Seen in: German Bundesliga 2025/26, European Individual Chess Championship 2026 | Boards 1-66, FIDE Candidates 2026: Open +2 more

Reached via

  • ×41.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 c5
  • ×31.d4 d5 2.c4 e6 3.Nf3 Nf6 4.Nc3 c5
  • ×11.Nf3 Nf6 2.c4 e6 3.Nc3 d5 4.d4 c5
  • + 3 other orders

Games (11)

Position at move 4
11games
2 move orders5 tournaments

Seen in: German Bundesliga 2025/26, European Individual Chess Championship 2026 | Boards 1-66, 23rd Bangkok Chess Club Open 2026 | Classical +2 more

Reached via

  • ×101.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 O-O
  • ×11.d4 e6 2.c4 Nf6 3.Nc3 Bb4 4.Qc2 O-O

Games (11)

Position at move 4
11games
5 tournaments

Seen in: European Individual Chess Championship 2026 | Boards 1-66, 4NCL Division 1 2025-2026, TCEC S29 AltSubfi Bonus +2 more

Reached via

  • ×111.e4 c5 2.Nf3 Nc6 3.Bb5 g6 4.O-O Bg7

Games (11)

Position at move 4
10games
4 tournaments

Seen in: 4NCL Division 1 2025-2026, European Individual Chess Championship 2026 | Boards 1-66, German Bundesliga 2025/26 +1 more

Reached via

  • ×101.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5

Games (10)

Position at move 4
10games
2 move orders5 tournaments

Seen in: 4NCL Division 1 2025-2026, European Individual Chess Championship 2026 | Boards 1-66, German Bundesliga 2025/26 +2 more

Reached via

  • ×71.d4 Nf6 2.c4 e6 3.Nf3 Bb4+ 4.Bd2 Qe7
  • ×31.d4 Nf6 2.Nf3 e6 3.c4 Bb4+ 4.Bd2 Qe7

Games (10)

Position at move 4
10games
6 tournaments

Seen in: German Bundesliga 2025/26, II Rio Chess Masters 2026 (ITT), European Individual Chess Championship 2026 | Boards 1-66 +3 more

Reached via

  • ×101.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Nf6

Games (10)

Position at move 4
10games
5 tournaments

Seen in: German Bundesliga 2025/26, European Individual Chess Championship 2026 | Boards 1-66, 23rd Bangkok Chess Club Open 2026 | Classical +2 more

Reached via

  • ×101.e4 e5 2.Nf3 Nf6 3.d4 Nxe4 4.Bd3 d5

Games (10)

Position at move 4
10games
7 move orders6 tournaments

Seen in: European Individual Chess Championship 2026 | Boards 1-66, German Bundesliga 2025/26, 2026 Chinese Team Chess Championship | Men +3 more

Reached via

  • ×31.Nf3 Nf6 2.c4 e6 3.g3 d5 4.Bg2 dxc4
  • ×21.Nf3 d5 2.c4 e6 3.g3 Nf6 4.Bg2 dxc4
  • ×11.c4 e6 2.g3 d5 3.Bg2 Nf6 4.Nf3 dxc4
  • + 4 other orders

Games (10)

Position at move 4
10games
3 move orders7 tournaments

Seen in: German Bundesliga 2025/26, French Youth Chess Championships 2026 | O20, 4NCL Division 1 2025-2026 +4 more

Reached via

  • ×61.Nf3 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6
  • ×31.c4 Nf6 2.Nf3 g6 3.Nc3 Bg7 4.e4 d6
  • ×11.c4 Nf6 2.Nc3 g6 3.Nf3 Bg7 4.e4 d6

Games (10)

Position at move 4
10games
5 tournaments

Seen in: 4NCL Division 1 2025-2026, 23rd Bangkok Chess Club Open 2026 | Classical, French Youth Chess Championships 2026 | G12 +2 more

Reached via

  • ×101.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6

Games (10)

Position at move 4
9games
4 move orders3 tournaments

Seen in: European Individual Chess Championship 2026 | Boards 1-66, German Bundesliga 2025/26, FIDE Candidates 2026: Open

Reached via

  • ×51.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6
  • ×21.d4 d5 2.c4 e6 3.Nf3 dxc4 4.e3 Nf6
  • ×11.d4 d5 2.Nf3 Nf6 3.c4 dxc4 4.e3 e6
  • + 1 other order

Games (9)

Position at move 4
9games
7 move orders4 tournaments

Seen in: European Individual Chess Championship 2026 | Boards 1-66, 23rd Bangkok Chess Club Open 2026 | Classical, 4NCL Division 1 2025-2026 +1 more

Reached via

  • ×21.c4 e6 2.g3 d5 3.Bg2 Nf6 4.Nf3 d4
  • ×21.c4 Nf6 2.Nf3 e6 3.g3 d5 4.Bg2 d4
  • ×11.c4 e6 2.Nf3 d5 3.g3 Nf6 4.Bg2 d4
  • + 4 other orders

Games (9)

Position at move 4
9games
5 tournaments

Seen in: European Individual Chess Championship 2026 | Boards 1-66, German Bundesliga 2025/26, 23rd Bangkok Chess Club Open 2026 | Classical +2 more

Reached via

  • ×91.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d3 h6

Games (9)