55.5M
positions
8.8M
practically solved
201.06T
engine nodes
1.6M
analyses
5,031
in queue
14
active workers
88
active cores
13.3M
nodes / sec
34.9
positions / min
131
proof number
3,717
disproof number
Root conquest: 0/20 first moves solved · 15.8% of tree positions solved · last 24h: 375,686 closures, 5.15T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 75 over 168 open obligations, of which 30 (17.9%) 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 2.3m (median of 142) · measured at 2026-09-18 01:00 UTC
Closures by source, last 24h (375657 of 375657 labelled): USER 99.9% (375187) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.1% (470) · last 7d (1504085 of 1504114): USER 95.9% (1442261) · FILL 0.5% (7765) · AUTO 3.3% (50188) · SOLVE 0.0% (0) · NONE 0.3% (3871). 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 … b5 26. Rab1 g5 27. Rfd1 Kg7 (User) · 128.0M nodes · auranvesdranor-j-002-atomicdb
- 1. Nh3 e6 2. e3 g6 … b5 26. Rab1 g5 27. Rfd1 Kf8 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … h4 11. Nxb7 Bd7 12. Nc3 Kf7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … h4 11. Nxb7 Bd7 12. Nc3 Rh7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … h4 11. Nxb7 Bd7 12. Nc3 Kf8 (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 | 1091 | 2 | |
| g1h3 | unsolved | 820 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| e2e4 | unsolved | 415 | 2 | |
| d2d4 | unsolved | 408 | 2 | |
| b1c3 | unsolved | 71 | 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 31.2% of the fleet | 1.61T | 12,212 |
| 2 | BManBJ 26.7% of the fleet | 1.38T | 10,602 |
| 3 | Torom 15.1% of the fleet | 776.96B | 5,134 |
| 4 | tenzink 12.1% of the fleet | 621.10B | 3,391 |
| 5 | randomchampgamer 11.4% of the fleet | 588.47B | 4,687 |
| 6 | MoNiKaMaDnEsS 3.5% of the fleet | 179.55B | 1,066 |
6 accounts · 5.15T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 39.6% of the fleet | 79.65T | 677,611 |
| 2 | tenzink 16.7% of the fleet | 33.57T | 286,487 |
| 3 | auranvesdranor 10.7% of the fleet | 21.56T | 154,216 |
| 4 | BManBJ 10.3% of the fleet | 20.78T | 140,189 |
| 5 | JackIV 3.9% of the fleet | 7.94T | 56,572 |
| 6 | randomchampgamer 3.4% of the fleet | 6.82T | 48,446 |
| 7 | RickEdinson 3.1% of the fleet | 6.32T | 41,667 |
| 8 | NeoArcturus 2.0% of the fleet | 4.09T | 16,751 |
| 9 | MoNiKaMaDnEsS 1.8% of the fleet | 3.63T | 23,044 |
| 10 | ijh 1.8% of the fleet | 3.57T | 37,348 |
and 22 more.
32 accounts · 201.19T 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 19 proposals · see every proposal
Milestones
- Sep 18 01:34 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nc3 d6 … Bh4 12. g3 Kg8 13. Kh1 Rb8
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 f5 7. e4 Be7 8. d4 g6 9. Bb5 Kf7 10. Be8 Kf8 11. O-O Bh4 12. g3 Kg8 13. Kh1 Rb8 - Sep 18 01:34 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … Kf7 19. Rf8 Ke7 20. Re8 Kf7
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 f5 7. e4 Be7 8. d4 g6 9. Bb5 Kf7 10. Be8 Kf8 11. O-O Bh4 12. g3 Kg8 13. Kh1 Rb8 14. gxh4 Rc8 15. Bxg6 h5 16. Rg1 Kf7 17. Rg7 Kf8 18. Rg8 Kf7 19. Rf8 Ke7 20. Re8 Kf7 - Sep 18 01:34 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 18. Rg8 Kf7 19. Rf8 Ke7 20. Re8
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 f5 7. e4 Be7 8. d4 g6 9. Bb5 Kf7 10. Be8 Kf8 11. O-O Bh4 12. g3 Kg8 13. Kh1 Rb8 14. gxh4 Rc8 15. Bxg6 h5 16. Rg1 Kf7 17. Rg7 Kf8 18. Rg8 Kf7 19. Rf8 Ke7 20. Re8 - Sep 18 01:34 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … Kf8 18. Rg8 Kf7 19. Rf8 Ke7
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 f5 7. e4 Be7 8. d4 g6 9. Bb5 Kf7 10. Be8 Kf8 11. O-O Bh4 12. g3 Kg8 13. Kh1 Rb8 14. gxh4 Rc8 15. Bxg6 h5 16. Rg1 Kf7 17. Rg7 Kf8 18. Rg8 Kf7 19. Rf8 Ke7 - Sep 18 01:34 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 17. Rg7 Kf8 18. Rg8 Kf7 19. Rf8
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 f5 7. e4 Be7 8. d4 g6 9. Bb5 Kf7 10. Be8 Kf8 11. O-O Bh4 12. g3 Kg8 13. Kh1 Rb8 14. gxh4 Rc8 15. Bxg6 h5 16. Rg1 Kf7 17. Rg7 Kf8 18. Rg8 Kf7 19. Rf8 - Sep 18 01:34 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … Kf7 17. Rg7 Kf8 18. Rg8 Kf7
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 f5 7. e4 Be7 8. d4 g6 9. Bb5 Kf7 10. Be8 Kf8 11. O-O Bh4 12. g3 Kg8 13. Kh1 Rb8 14. gxh4 Rc8 15. Bxg6 h5 16. Rg1 Kf7 17. Rg7 Kf8 18. Rg8 Kf7 - Sep 18 01:34 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 16. Rg1 Kf7 17. Rg7 Kf8 18. Rg8
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 f5 7. e4 Be7 8. d4 g6 9. Bb5 Kf7 10. Be8 Kf8 11. O-O Bh4 12. g3 Kg8 13. Kh1 Rb8 14. gxh4 Rc8 15. Bxg6 h5 16. Rg1 Kf7 17. Rg7 Kf8 18. Rg8 - Sep 18 01:34 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … h5 16. Rg1 Kf7 17. Rg7 Kf8
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 f5 7. e4 Be7 8. d4 g6 9. Bb5 Kf7 10. Be8 Kf8 11. O-O Bh4 12. g3 Kg8 13. Kh1 Rb8 14. gxh4 Rc8 15. Bxg6 h5 16. Rg1 Kf7 17. Rg7 Kf8 - Sep 18 01:34 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 15. Bxg6 h5 16. Rg1 Kf7 17. Rg7
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 f5 7. e4 Be7 8. d4 g6 9. Bb5 Kf7 10. Be8 Kf8 11. O-O Bh4 12. g3 Kg8 13. Kh1 Rb8 14. gxh4 Rc8 15. Bxg6 h5 16. Rg1 Kf7 17. Rg7 - Sep 18 01:34 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … Rc8 15. Bxg6 h5 16. Rg1 Kf7
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 f5 7. e4 Be7 8. d4 g6 9. Bb5 Kf7 10. Be8 Kf8 11. O-O Bh4 12. g3 Kg8 13. Kh1 Rb8 14. gxh4 Rc8 15. Bxg6 h5 16. Rg1 Kf7 - Sep 18 01:34 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 14. gxh4 Rc8 15. Bxg6 h5 16. Rg1
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 f5 7. e4 Be7 8. d4 g6 9. Bb5 Kf7 10. Be8 Kf8 11. O-O Bh4 12. g3 Kg8 13. Kh1 Rb8 14. gxh4 Rc8 15. Bxg6 h5 16. Rg1 - Sep 18 01:34 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … Rb8 14. gxh4 Rc8 15. Bxg6 h5
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 f5 7. e4 Be7 8. d4 g6 9. Bb5 Kf7 10. Be8 Kf8 11. O-O Bh4 12. g3 Kg8 13. Kh1 Rb8 14. gxh4 Rc8 15. Bxg6 h5