64.7M
positions
11.5M
practically solved
232.21T
engine nodes
1.8M
analyses
7,741
in queue
10
active workers
64
active cores
2.4M
nodes / sec
20.5
positions / min
125
proof number
3,777
disproof number
Root conquest: 0/20 first moves solved · 17.8% of tree positions solved · last 24h: 333,470 closures, 4.57T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 81 over 191 open obligations, of which 30 (15.7%) 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 2.6m (median of 102) · measured at 2026-09-27 17:00 UTC
Closures by source, last 24h (333409 of 333409 labelled): USER 96.8% (322753) · FILL 0.7% (2429) · AUTO 2.3% (7673) · SOLVE 0.0% (0) · NONE 0.2% (554) · last 7d (1276089 of 1276139): USER 96.7% (1233534) · FILL 0.7% (8795) · AUTO 2.5% (32065) · SOLVE 0.0% (0) · NONE 0.1% (1695). 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. e3 g6 … Bc8 17. b4 Re8 18. O-O Rg8 (User) · 128.0M nodes · auranvesdranor-admin-835912-atomicdb
- 1. Nh3 e6 2. e3 g6 … Bc8 17. b4 Re8 18. O-O Rh8 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nh3 d5 2. Nc3 h6 … e5 12. axb4 Rac8 13. Bb5 Rc7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … 7. d5 h4 8. Nc3 Qb5 9. Nxb5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … 8. Nc3 Qb5 9. Bxb5 g6 10. e5 (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 | 1012 | 2 | |
| g1h3 | unsolved | 704 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 435 | 2 | |
| e2e4 | unsolved | 417 | 2 | |
| b1c3 | unsolved | 183 | 2 | |
| c2c3 | unsolved | 19 | 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 | -301 | 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 | NitroColoraze 29.4% of the fleet | 1.34T | 8,333 |
| 2 | BManBJ 24.1% of the fleet | 1.10T | 7,442 |
| 3 | auranvesdranor 18.8% of the fleet | 859.98B | 5,189 |
| 4 | tenzink 12.6% of the fleet | 575.97B | 3,560 |
| 5 | randomchampgamer 12.1% of the fleet | 550.93B | 4,049 |
| 6 | MoNiKaMaDnEsS 2.4% of the fleet | 108.83B | 743 |
| 7 | soothdest 0.3% of the fleet | 15.98B | 122 |
| 8 | RandomMatrix 0.2% of the fleet | 10.11B | 76 |
| 9 | rhaxier <0.1% of the fleet | 1.66B | 13 |
| 10 | bricerichmond <0.1% of the fleet | 700.3M | 6 |
10 accounts · 4.57T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 38.9% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.6% of the fleet | 36.30T | 304,705 |
| 3 | BManBJ 11.4% of the fleet | 26.48T | 181,808 |
| 4 | auranvesdranor 11.2% of the fleet | 26.06T | 187,232 |
| 5 | JackIV 4.3% of the fleet | 10.06T | 67,859 |
| 6 | randomchampgamer 3.9% of the fleet | 9.07T | 65,855 |
| 7 | RickEdinson 2.8% of the fleet | 6.50T | 43,070 |
| 8 | MoNiKaMaDnEsS 1.8% of the fleet | 4.14T | 26,565 |
| 9 | NeoArcturus 1.8% of the fleet | 4.09T | 16,756 |
| 10 | ijh 1.5% of the fleet | 3.57T | 37,348 |
and 23 more.
33 accounts · 232.29T 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 · 16 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 21 proposals · see every proposal
Milestones
- Sep 27 17:41 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nc3 d6 … b5 11. d4 a5 12. Bd2 bxc4
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Be7 7. e3 h5 8. Bb5 Kf8 9. c4 a6 10. Be8 b5 11. d4 a5 12. Bd2 bxc4 - Sep 27 17:41 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … Rxc8 18. Qe8 g5 19. Qh8 Kf7
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Be7 7. e3 h5 8. Bb5 Kf8 9. c4 a6 10. Be8 b5 11. d4 a5 12. Bd2 bxc4 13. Bxh5 g6 14. Qa4 Kg7 15. Rc1 d5 16. Rc8 Bb4 17. Bc3 Rxc8 18. Qe8 g5 19. Qh8 Kf7 - Sep 27 17:41 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 17. Bc3 Rxc8 18. Qe8 g5 19. Qh8
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Be7 7. e3 h5 8. Bb5 Kf8 9. c4 a6 10. Be8 b5 11. d4 a5 12. Bd2 bxc4 13. Bxh5 g6 14. Qa4 Kg7 15. Rc1 d5 16. Rc8 Bb4 17. Bc3 Rxc8 18. Qe8 g5 19. Qh8 - Sep 27 17:41 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … Bb4 17. Bc3 Rxc8 18. Qe8 g5
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Be7 7. e3 h5 8. Bb5 Kf8 9. c4 a6 10. Be8 b5 11. d4 a5 12. Bd2 bxc4 13. Bxh5 g6 14. Qa4 Kg7 15. Rc1 d5 16. Rc8 Bb4 17. Bc3 Rxc8 18. Qe8 g5 - Sep 27 17:41 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 16. Rc8 Bb4 17. Bc3 Rxc8 18. Qe8
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Be7 7. e3 h5 8. Bb5 Kf8 9. c4 a6 10. Be8 b5 11. d4 a5 12. Bd2 bxc4 13. Bxh5 g6 14. Qa4 Kg7 15. Rc1 d5 16. Rc8 Bb4 17. Bc3 Rxc8 18. Qe8 - Sep 27 17:41 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … d5 16. Rc8 Bb4 17. Bc3 Rxc8
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Be7 7. e3 h5 8. Bb5 Kf8 9. c4 a6 10. Be8 b5 11. d4 a5 12. Bd2 bxc4 13. Bxh5 g6 14. Qa4 Kg7 15. Rc1 d5 16. Rc8 Bb4 17. Bc3 Rxc8 - Sep 27 17:41 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 15. Rc1 d5 16. Rc8 Bb4 17. Bc3
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Be7 7. e3 h5 8. Bb5 Kf8 9. c4 a6 10. Be8 b5 11. d4 a5 12. Bd2 bxc4 13. Bxh5 g6 14. Qa4 Kg7 15. Rc1 d5 16. Rc8 Bb4 17. Bc3 - Sep 27 17:41 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … Kg7 15. Rc1 d5 16. Rc8 Bb4
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Be7 7. e3 h5 8. Bb5 Kf8 9. c4 a6 10. Be8 b5 11. d4 a5 12. Bd2 bxc4 13. Bxh5 g6 14. Qa4 Kg7 15. Rc1 d5 16. Rc8 Bb4 - Sep 27 17:41 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 14. Qa4 Kg7 15. Rc1 d5 16. Rc8
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Be7 7. e3 h5 8. Bb5 Kf8 9. c4 a6 10. Be8 b5 11. d4 a5 12. Bd2 bxc4 13. Bxh5 g6 14. Qa4 Kg7 15. Rc1 d5 16. Rc8 - Sep 27 17:41 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … g6 14. Qa4 Kg7 15. Rc1 d5
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Be7 7. e3 h5 8. Bb5 Kf8 9. c4 a6 10. Be8 b5 11. d4 a5 12. Bd2 bxc4 13. Bxh5 g6 14. Qa4 Kg7 15. Rc1 d5 - Sep 27 17:41 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 13. Bxh5 g6 14. Qa4 Kg7 15. Rc1
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Be7 7. e3 h5 8. Bb5 Kf8 9. c4 a6 10. Be8 b5 11. d4 a5 12. Bd2 bxc4 13. Bxh5 g6 14. Qa4 Kg7 15. Rc1 - Sep 27 17:41 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … bxc4 13. Bxh5 g6 14. Qa4 Kg7
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Be7 7. e3 h5 8. Bb5 Kf8 9. c4 a6 10. Be8 b5 11. d4 a5 12. Bd2 bxc4 13. Bxh5 g6 14. Qa4 Kg7