54.7M
positions
8.6M
practically solved
198.43T
engine nodes
1.6M
analyses
5,356
in queue
12
active workers
64
active cores
16.1M
nodes / sec
21.5
positions / min
131
proof number
3,717
disproof number
Root conquest: 0/20 first moves solved · 15.7% of tree positions solved · last 24h: 306,278 closures, 4.15T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 74 over 169 open obligations, of which 30 (17.8%) 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 2.2h (median of 138) · measured at 2026-09-17 15:00 UTC
Closures by source, last 24h (306205 of 306205 labelled): USER 99.8% (305551) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.2% (654) · last 7d (1352659 of 1352662): USER 94.4% (1276897) · FILL 0.8% (10341) · AUTO 4.5% (61385) · SOLVE 0.0% (0) · NONE 0.3% (4036). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nh3 f5 2. e3 e6 … 11. g3 b5 12. Bd2 Be7 13. Nd6 (User) · 128.0M nodes · auranvesdranor-j-002-atomicdb
- 1. Nh3 f5 2. e3 e6 … 11. g3 b5 12. Bd2 Be7 13. f4 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 f6 2. e4 e6 … a5 20. h5 a4 21. b4 Nd8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … e6 9. Bd8 Ba6 10. c4 b5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … e6 9. Bd8 Ba6 10. c4 c5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
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 | 1100 | 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 35.8% of the fleet | 1.49T | 11,379 |
| 2 | BManBJ 33.3% of the fleet | 1.38T | 10,594 |
| 3 | tenzink 14.7% of the fleet | 610.86B | 2,974 |
| 4 | randomchampgamer 14.3% of the fleet | 594.17B | 4,657 |
| 5 | MoNiKaMaDnEsS 1.8% of the fleet | 76.16B | 442 |
5 accounts · 4.15T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 40.1% of the fleet | 79.65T | 677,611 |
| 2 | tenzink 16.8% of the fleet | 33.32T | 284,884 |
| 3 | auranvesdranor 10.5% of the fleet | 20.95T | 149,566 |
| 4 | BManBJ 10.2% of the fleet | 20.23T | 135,867 |
| 5 | JackIV 4.0% of the fleet | 7.94T | 56,572 |
| 6 | randomchampgamer 3.3% of the fleet | 6.59T | 46,583 |
| 7 | RickEdinson 3.2% of the fleet | 6.32T | 41,667 |
| 8 | NeoArcturus 2.1% of the fleet | 4.09T | 16,751 |
| 9 | ijh 1.8% of the fleet | 3.57T | 37,348 |
| 10 | MoNiKaMaDnEsS 1.7% of the fleet | 3.47T | 22,133 |
and 22 more.
32 accounts · 198.60T 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 17 16:04 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nd4 d6 … b5 8. a4 b4 9. d4 h6
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 d5 7. e4 b5 8. a4 b4 9. d4 h6 - Sep 17 16:04 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 d6 … Nf6 19. dxe5 f4 20. Be7 Kg7
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 d5 7. e4 b5 8. a4 b4 9. d4 h6 10. Ba6 g6 11. Qg4 Bd6 12. exd5 Ne7 13. Bb5 Kf8 14. Be8 f5 15. Qf4 e5 16. Qg5 hxg5 17. Bg5 Nd5 18. Bf7 Nf6 19. dxe5 f4 20. Be7 Kg7 - Sep 17 16:04 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 d6 … 18. Bf7 Nf6 19. dxe5 f4 20. Be7
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 d5 7. e4 b5 8. a4 b4 9. d4 h6 10. Ba6 g6 11. Qg4 Bd6 12. exd5 Ne7 13. Bb5 Kf8 14. Be8 f5 15. Qf4 e5 16. Qg5 hxg5 17. Bg5 Nd5 18. Bf7 Nf6 19. dxe5 f4 20. Be7 - Sep 17 16:04 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 d6 … Nd5 18. Bf7 Nf6 19. dxe5 f4
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 d5 7. e4 b5 8. a4 b4 9. d4 h6 10. Ba6 g6 11. Qg4 Bd6 12. exd5 Ne7 13. Bb5 Kf8 14. Be8 f5 15. Qf4 e5 16. Qg5 hxg5 17. Bg5 Nd5 18. Bf7 Nf6 19. dxe5 f4 - Sep 17 16:04 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 d6 … 17. Bg5 Nd5 18. Bf7 Nf6 19. dxe5
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 d5 7. e4 b5 8. a4 b4 9. d4 h6 10. Ba6 g6 11. Qg4 Bd6 12. exd5 Ne7 13. Bb5 Kf8 14. Be8 f5 15. Qf4 e5 16. Qg5 hxg5 17. Bg5 Nd5 18. Bf7 Nf6 19. dxe5 - Sep 17 16:04 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 d6 … hxg5 17. Bg5 Nd5 18. Bf7 Nf6
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 d5 7. e4 b5 8. a4 b4 9. d4 h6 10. Ba6 g6 11. Qg4 Bd6 12. exd5 Ne7 13. Bb5 Kf8 14. Be8 f5 15. Qf4 e5 16. Qg5 hxg5 17. Bg5 Nd5 18. Bf7 Nf6 - Sep 17 16:04 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 d6 … 16. Qg5 hxg5 17. Bg5 Nd5 18. Bf7
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 d5 7. e4 b5 8. a4 b4 9. d4 h6 10. Ba6 g6 11. Qg4 Bd6 12. exd5 Ne7 13. Bb5 Kf8 14. Be8 f5 15. Qf4 e5 16. Qg5 hxg5 17. Bg5 Nd5 18. Bf7 - Sep 17 16:04 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 d6 … e5 16. Qg5 hxg5 17. Bg5 Nd5
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 d5 7. e4 b5 8. a4 b4 9. d4 h6 10. Ba6 g6 11. Qg4 Bd6 12. exd5 Ne7 13. Bb5 Kf8 14. Be8 f5 15. Qf4 e5 16. Qg5 hxg5 17. Bg5 Nd5 - Sep 17 16:04 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 d6 … 15. Qf4 e5 16. Qg5 hxg5 17. Bg5
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 d5 7. e4 b5 8. a4 b4 9. d4 h6 10. Ba6 g6 11. Qg4 Bd6 12. exd5 Ne7 13. Bb5 Kf8 14. Be8 f5 15. Qf4 e5 16. Qg5 hxg5 17. Bg5 - Sep 17 16:04 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 d6 … f5 15. Qf4 e5 16. Qg5 hxg5
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 d5 7. e4 b5 8. a4 b4 9. d4 h6 10. Ba6 g6 11. Qg4 Bd6 12. exd5 Ne7 13. Bb5 Kf8 14. Be8 f5 15. Qf4 e5 16. Qg5 hxg5 - Sep 17 16:04 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 d6 … 14. Be8 f5 15. Qf4 e5 16. Qg5
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 d5 7. e4 b5 8. a4 b4 9. d4 h6 10. Ba6 g6 11. Qg4 Bd6 12. exd5 Ne7 13. Bb5 Kf8 14. Be8 f5 15. Qf4 e5 16. Qg5 - Sep 17 16:04 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 d6 … Kf8 14. Be8 f5 15. Qf4 e5
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 d5 7. e4 b5 8. a4 b4 9. d4 h6 10. Ba6 g6 11. Qg4 Bd6 12. exd5 Ne7 13. Bb5 Kf8 14. Be8 f5 15. Qf4 e5