53.7M
positions
8.3M
practically solved
195.17T
engine nodes
1.5M
analyses
3,507
in queue
11
active workers
72
active cores
9.0M
nodes / sec
22.1
positions / min
131
proof number
3,716
disproof number
Root conquest: 0/20 first moves solved · 15.4% of tree positions solved · last 24h: 328,518 closures, 4.78T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 72 over 164 open obligations, of which 30 (18.3%) sit at or below dn 2, one unanswered question from falling over · 0 open nodes on impossible numbers · positions a visitor asked for close in 7.1h (median of 114) · measured at 2026-09-16 20:00 UTC
Closures by source, last 24h (328450 of 328450 labelled): USER 99.8% (327861) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.2% (589) · last 7d (1231210 of 1231278): USER 90.9% (1118753) · FILL 1.3% (16449) · AUTO 7.5% (92096) · SOLVE 0.0% (0) · NONE 0.3% (3912). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nh3 e6 2. Nc3 h6 … 6. Nf4 Kb8 7. Nh5 g6 8. Nf6 (User) · 128.0M nodes · auranvesdranor-admin-835912-atomicdb
- 1. Nh3 e6 2. Nc3 h6 … 6. Nf4 Kb8 7. Nh5 g6 8. Bb5 (User) · 128.0M nodes · auranvesdranor-j-002-atomicdb
- 1. Nh3 f6 2. Nc3 h6 … d5 6. Bb5 Kd8 7. b4 Ke7 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … 8. Bg5 Ngf6 9. Nd8 e5 10. Ne6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … h5 8. Bg5 Ngf6 9. Nd8 b5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
Play to explore drag a piece or click two squares
Keyboard move list
First moves from the starting position
| move | state | eval | visits | |
|---|---|---|---|---|
| g1f3 | unsolved | 1083 | 2 | |
| g1h3 | unsolved | 820 | 2 | |
| e2e3 | unsolved | 502 | 3 | |
| e2e4 | unsolved | 409 | 2 | |
| d2d4 | unsolved | 408 | 2 | |
| b1c3 | unsolved | 74 | 2 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b2b4 | unsolved | 0 | 3 | |
| b1a3 | unsolved | 0 | 3 | |
| h2h3 | unsolved | -100 | 2 | |
| a2a3 | unsolved | -103 | 2 | |
| f2f3 | unsolved | -110 | 2 | |
| d2d3 | unsolved | -116 | 2 | |
| b2b3 | unsolved | -119 | 1 | |
| f2f4 | unsolved | -223 | 3 | |
| h2h4 | unsolved | -500 | 2 | |
| a2a4 | unsolved | -502 | 2 | |
| g2g4 | unsolved | -600 | 2 | |
| c2c4 | unsolved | -700 | 3 |
Contributors by engine nodes
Every position in this tree was searched by somebody's machine. Ties share a place, and the share is measured against everything the whole fleet searched in that window.
Last 24 hours
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | auranvesdranor 30.8% of the fleet | 1.47T | 11,355 |
| 2 | BManBJ 28.7% of the fleet | 1.37T | 10,211 |
| 3 | tenzink 13.6% of the fleet | 652.14B | 4,150 |
| 4 | randomchampgamer 11.8% of the fleet | 565.97B | 4,456 |
| 5 | MoNiKaMaDnEsS 7.1% of the fleet | 341.08B | 2,184 |
| 6 | JackIV 6.2% of the fleet | 295.46B | 1,826 |
| 7 | NeoArcturus 1.8% of the fleet | 85.13B | 244 |
7 accounts · 4.78T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 40.8% of the fleet | 79.65T | 677,611 |
| 2 | tenzink 16.8% of the fleet | 32.83T | 282,518 |
| 3 | auranvesdranor 10.1% of the fleet | 19.69T | 139,964 |
| 4 | BManBJ 9.8% of the fleet | 19.12T | 127,324 |
| 5 | JackIV 4.1% of the fleet | 7.94T | 56,572 |
| 6 | RickEdinson 3.2% of the fleet | 6.32T | 41,667 |
| 7 | randomchampgamer 3.1% of the fleet | 6.11T | 42,783 |
| 8 | NeoArcturus 2.1% of the fleet | 4.09T | 16,751 |
| 9 | ijh 1.8% of the fleet | 3.57T | 37,348 |
| 10 | MoNiKaMaDnEsS 1.8% of the fleet | 3.45T | 21,978 |
and 22 more.
32 accounts · 195.25T nodes searched by the whole fleet.
Proposed campaigns
Anyone can put a line up and vote for it. The site owner decides which one the solver actually runs.
- Should be easiest proof for nf3 e51. Nf3 e5 2. e4proposed by quasa · 15 votes
- Pls nh4 is more solvable than c31. Nf3 f6 2. e4 e6 3. Nc3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. d4 g6 7. Nh4proposed by 67king · 6 votes
- Refuting 1... d61. Nf3 d6 2. Nc3proposed by randomchampgamer · 3 votes
- The weaker of the two f-pawn advances for 1. ...d61. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4proposed by MoNiKaMaDnEsS · 3 votes
- Let's solve Qc8 in 2N Nh6 mainline and/or use it as a benchmark1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 Bb4 6. e5 fxe5 7. Ng5 d5 8. h4 e5 9. Qe2 Nxg4 10. f3 Bg4 11. Bh3 Qc8 12. Bh6proposed by soothdest · 3 votes
- Is Nh3 h6 e3 e6 Nc3 a draw?1. Nh3 e6 2. e3 h6 3. Nc3proposed by soothdest · 3 votes
Showing the 6 most voted of 18 proposals · see every proposal
Milestones
- Sep 16 20:35 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nd4 d6 … d5 9. e4 Ba3 10. axb5 Rf8
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 Nh6 7. h3 b5 8. a4 d5 9. e4 Ba3 10. axb5 Rf8 - Sep 16 20:35 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 d6 … Kd7 18. Bc8 Ke8 19. Bd7 Kf7
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 Nh6 7. h3 b5 8. a4 d5 9. e4 Ba3 10. axb5 Rf8 11. bxa3 O-O-O 12. Ba6 Kc7 13. Ba3 Ng4 14. hxg4 Rb8 15. Bd6 Kd8 16. Be7 Kc7 17. Bd8 Kd7 18. Bc8 Ke8 19. Bd7 Kf7 - Sep 16 20:35 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 d6 … 17. Bd8 Kd7 18. Bc8 Ke8 19. Bd7
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 Nh6 7. h3 b5 8. a4 d5 9. e4 Ba3 10. axb5 Rf8 11. bxa3 O-O-O 12. Ba6 Kc7 13. Ba3 Ng4 14. hxg4 Rb8 15. Bd6 Kd8 16. Be7 Kc7 17. Bd8 Kd7 18. Bc8 Ke8 19. Bd7 - Sep 16 20:35 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 d6 … Kc7 17. Bd8 Kd7 18. Bc8 Ke8
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 Nh6 7. h3 b5 8. a4 d5 9. e4 Ba3 10. axb5 Rf8 11. bxa3 O-O-O 12. Ba6 Kc7 13. Ba3 Ng4 14. hxg4 Rb8 15. Bd6 Kd8 16. Be7 Kc7 17. Bd8 Kd7 18. Bc8 Ke8 - Sep 16 20:35 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 d6 … 16. Be7 Kc7 17. Bd8 Kd7 18. Bc8
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 Nh6 7. h3 b5 8. a4 d5 9. e4 Ba3 10. axb5 Rf8 11. bxa3 O-O-O 12. Ba6 Kc7 13. Ba3 Ng4 14. hxg4 Rb8 15. Bd6 Kd8 16. Be7 Kc7 17. Bd8 Kd7 18. Bc8 - Sep 16 20:35 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 d6 … Kd8 16. Be7 Kc7 17. Bd8 Kd7
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 Nh6 7. h3 b5 8. a4 d5 9. e4 Ba3 10. axb5 Rf8 11. bxa3 O-O-O 12. Ba6 Kc7 13. Ba3 Ng4 14. hxg4 Rb8 15. Bd6 Kd8 16. Be7 Kc7 17. Bd8 Kd7 - Sep 16 20:35 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 d6 … 15. Bd6 Kd8 16. Be7 Kc7 17. Bd8
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 Nh6 7. h3 b5 8. a4 d5 9. e4 Ba3 10. axb5 Rf8 11. bxa3 O-O-O 12. Ba6 Kc7 13. Ba3 Ng4 14. hxg4 Rb8 15. Bd6 Kd8 16. Be7 Kc7 17. Bd8 - Sep 16 20:35 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 d6 … Rb8 15. Bd6 Kd8 16. Be7 Kc7
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 Nh6 7. h3 b5 8. a4 d5 9. e4 Ba3 10. axb5 Rf8 11. bxa3 O-O-O 12. Ba6 Kc7 13. Ba3 Ng4 14. hxg4 Rb8 15. Bd6 Kd8 16. Be7 Kc7 - Sep 16 20:35 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 d6 … 14. hxg4 Rb8 15. Bd6 Kd8 16. Be7
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 Nh6 7. h3 b5 8. a4 d5 9. e4 Ba3 10. axb5 Rf8 11. bxa3 O-O-O 12. Ba6 Kc7 13. Ba3 Ng4 14. hxg4 Rb8 15. Bd6 Kd8 16. Be7 - Sep 16 20:35 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 d6 … Ng4 14. hxg4 Rb8 15. Bd6 Kd8
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 Nh6 7. h3 b5 8. a4 d5 9. e4 Ba3 10. axb5 Rf8 11. bxa3 O-O-O 12. Ba6 Kc7 13. Ba3 Ng4 14. hxg4 Rb8 15. Bd6 Kd8 - Sep 16 20:35 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 d6 … 13. Ba3 Ng4 14. hxg4 Rb8 15. Bd6
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 Nh6 7. h3 b5 8. a4 d5 9. e4 Ba3 10. axb5 Rf8 11. bxa3 O-O-O 12. Ba6 Kc7 13. Ba3 Ng4 14. hxg4 Rb8 15. Bd6 - Sep 16 20:35 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 d6 … Kc7 13. Ba3 Ng4 14. hxg4 Rb8
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 Nh6 7. h3 b5 8. a4 d5 9. e4 Ba3 10. axb5 Rf8 11. bxa3 O-O-O 12. Ba6 Kc7 13. Ba3 Ng4 14. hxg4 Rb8