59.8M
positions
10.0M
practically solved
215.28T
engine nodes
1.7M
analyses
4,042
in queue
12
active workers
84
active cores
8.6M
nodes / sec
28.5
positions / min
131
proof number
3,777
disproof number
Root conquest: 0/20 first moves solved · 16.8% of tree positions solved · last 24h: 427,313 closures, 5.52T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 78 over 171 open obligations, of which 28 (16.4%) 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 14.2m (median of 158) · measured at 2026-09-20 12:00 UTC
Closures by source, last 24h (427222 of 427222 labelled): USER 99.9% (426730) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.1% (492) · last 7d (2329987 of 2330039): USER 99.7% (2324088) · FILL 0.1% (1561) · AUTO 0.0% (559) · SOLVE 0.0% (0) · NONE 0.2% (3779). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nh3 f6 2. Nc3 h6 … Kf8 10. Bb5 f5 11. Bb2 Kf7 (User) · 128.0M nodes · auranvesdranor-admin-835912-atomicdb
- 1. Nh3 e6 2. Nc3 h6 … h5 8. e4 f6 9. c3 b5 (User) · 128.0M nodes · auranvesdranor-j-002-atomicdb
- 1. Nh3 f6 2. Nc3 h6 … Kf8 10. Bb5 f5 11. Bb2 Ke8 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … c5 16. c4 g5 17. g4 Kf7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … c5 16. c4 g5 17. g4 Re8 (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 | 1075 | 2 | |
| g1h3 | unsolved | 752 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 435 | 2 | |
| e2e4 | unsolved | 417 | 2 | |
| b1c3 | unsolved | 72 | 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 | BManBJ 27.4% of the fleet | 1.52T | 11,429 |
| 2 | auranvesdranor 23.3% of the fleet | 1.29T | 9,869 |
| 3 | JackIV 18.4% of the fleet | 1.02T | 5,138 |
| 4 | tenzink 11.1% of the fleet | 611.97B | 4,282 |
| 5 | randomchampgamer 9.2% of the fleet | 510.34B | 4,105 |
| 6 | Torom 8.4% of the fleet | 464.11B | 3,174 |
| 7 | MoNiKaMaDnEsS 2.2% of the fleet | 120.58B | 891 |
| 8 | soothdest <0.1% of the fleet | 1.04B | 9 |
8 accounts · 5.52T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 37.0% of the fleet | 79.65T | 677,611 |
| 2 | tenzink 16.3% of the fleet | 35.03T | 296,426 |
| 3 | auranvesdranor 11.5% of the fleet | 24.81T | 179,032 |
| 4 | BManBJ 11.3% of the fleet | 24.33T | 166,467 |
| 5 | JackIV 4.6% of the fleet | 9.88T | 66,703 |
| 6 | randomchampgamer 3.8% of the fleet | 8.21T | 59,302 |
| 7 | RickEdinson 2.9% of the fleet | 6.32T | 41,667 |
| 8 | NeoArcturus 1.9% of the fleet | 4.09T | 16,756 |
| 9 | MoNiKaMaDnEsS 1.8% of the fleet | 3.96T | 25,268 |
| 10 | ijh 1.7% of the fleet | 3.57T | 37,348 |
and 22 more.
32 accounts · 215.51T 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 19 proposals · see every proposal
Milestones
- Sep 20 13:06 Solved: WHITE_WIN via MINIMAXview
1. Nh3 f6 2. Nc3 h6 … Kf8 10. Bb5 f5 11. Bb2 Bxb4
1. Nh3 f6 2. Nc3 h6 3. Nd5 e6 4. e3 Na6 5. Nxc7 Ne7 6. Qh5 g6 7. Qb5 Ng8 8. Qxb7 Be7 9. b4 Kf8 10. Bb5 f5 11. Bb2 Bxb4 - Sep 20 13:06 Solved: WHITE_WIN via MATE_PVview
1. Nh3 f6 2. Nc3 h6 … 12. Rb1 Nf6 13. Bxf6 Kg7 14. Nf4
1. Nh3 f6 2. Nc3 h6 3. Nd5 e6 4. e3 Na6 5. Nxc7 Ne7 6. Qh5 g6 7. Qb5 Ng8 8. Qxb7 Be7 9. b4 Kf8 10. Bb5 f5 11. Bb2 Bxb4 12. Rb1 Nf6 13. Bxf6 Kg7 14. Nf4 - Sep 20 13:06 Solved: WHITE_WIN via MATE_PVview
1. Nh3 f6 2. Nc3 h6 … Bxb4 12. Rb1 Nf6 13. Bxf6 Kg7
1. Nh3 f6 2. Nc3 h6 3. Nd5 e6 4. e3 Na6 5. Nxc7 Ne7 6. Qh5 g6 7. Qb5 Ng8 8. Qxb7 Be7 9. b4 Kf8 10. Bb5 f5 11. Bb2 Bxb4 12. Rb1 Nf6 13. Bxf6 Kg7 - Sep 20 13:06 Solved: WHITE_WIN via MATE_PVview
1. Nh3 f6 2. Nc3 h6 … 11. Bb2 Bxb4 12. Rb1 Nf6 13. Bxf6
1. Nh3 f6 2. Nc3 h6 3. Nd5 e6 4. e3 Na6 5. Nxc7 Ne7 6. Qh5 g6 7. Qb5 Ng8 8. Qxb7 Be7 9. b4 Kf8 10. Bb5 f5 11. Bb2 Bxb4 12. Rb1 Nf6 13. Bxf6 - Sep 20 13:06 Solved: WHITE_WIN via MATE_PVview
1. Nh3 f6 2. Nc3 h6 … f5 11. Bb2 Bxb4 12. Rb1 Nf6
1. Nh3 f6 2. Nc3 h6 3. Nd5 e6 4. e3 Na6 5. Nxc7 Ne7 6. Qh5 g6 7. Qb5 Ng8 8. Qxb7 Be7 9. b4 Kf8 10. Bb5 f5 11. Bb2 Bxb4 12. Rb1 Nf6 - Sep 20 13:06 Solved: WHITE_WIN via MATE_PVview
1. Nh3 f6 2. Nc3 h6 … 10. Bb5 f5 11. Bb2 Bxb4 12. Rb1
1. Nh3 f6 2. Nc3 h6 3. Nd5 e6 4. e3 Na6 5. Nxc7 Ne7 6. Qh5 g6 7. Qb5 Ng8 8. Qxb7 Be7 9. b4 Kf8 10. Bb5 f5 11. Bb2 Bxb4 12. Rb1 - Sep 20 13:06 Solved: WHITE_WIN via MATE_PVview
1. Nh3 f6 2. Nc3 h6 … Kg5 24. Rg8 Kh4 25. h3 e5
1. Nh3 f6 2. Nc3 h6 3. Nd5 e6 4. e3 Na6 5. Nxc7 Ne7 6. Qh5 g6 7. Qb5 Ng8 8. Qxb7 Be7 9. b4 Kf8 10. Bb5 f5 11. Bb2 Bxb4 12. Nf4 Nf6 13. Bxf6 g5 14. Rb1 Kg7 15. Rb8 Rc8 16. Nh5 Kf7 17. O-O g4 18. Nf6 g3 19. fxg3 d5 20. Rxc8 f4 21. Rb1 f3 22. gxf3 Kg6 23. Rb8 Kg5 24. Rg8 Kh4 25. h3 e5 - Sep 20 13:06 Solved: WHITE_WIN via MATE_PVview
1. Nh3 f6 2. Nc3 h6 … 23. Rb8 Kg5 24. Rg8 Kh4 25. h3
1. Nh3 f6 2. Nc3 h6 3. Nd5 e6 4. e3 Na6 5. Nxc7 Ne7 6. Qh5 g6 7. Qb5 Ng8 8. Qxb7 Be7 9. b4 Kf8 10. Bb5 f5 11. Bb2 Bxb4 12. Nf4 Nf6 13. Bxf6 g5 14. Rb1 Kg7 15. Rb8 Rc8 16. Nh5 Kf7 17. O-O g4 18. Nf6 g3 19. fxg3 d5 20. Rxc8 f4 21. Rb1 f3 22. gxf3 Kg6 23. Rb8 Kg5 24. Rg8 Kh4 25. h3 - Sep 20 13:06 Solved: WHITE_WIN via MATE_PVview
1. Nh3 f6 2. Nc3 h6 … Kg6 23. Rb8 Kg5 24. Rg8 Kh4
1. Nh3 f6 2. Nc3 h6 3. Nd5 e6 4. e3 Na6 5. Nxc7 Ne7 6. Qh5 g6 7. Qb5 Ng8 8. Qxb7 Be7 9. b4 Kf8 10. Bb5 f5 11. Bb2 Bxb4 12. Nf4 Nf6 13. Bxf6 g5 14. Rb1 Kg7 15. Rb8 Rc8 16. Nh5 Kf7 17. O-O g4 18. Nf6 g3 19. fxg3 d5 20. Rxc8 f4 21. Rb1 f3 22. gxf3 Kg6 23. Rb8 Kg5 24. Rg8 Kh4 - Sep 20 13:06 Solved: WHITE_WIN via MATE_PVview
1. Nh3 f6 2. Nc3 h6 … 22. gxf3 Kg6 23. Rb8 Kg5 24. Rg8
1. Nh3 f6 2. Nc3 h6 3. Nd5 e6 4. e3 Na6 5. Nxc7 Ne7 6. Qh5 g6 7. Qb5 Ng8 8. Qxb7 Be7 9. b4 Kf8 10. Bb5 f5 11. Bb2 Bxb4 12. Nf4 Nf6 13. Bxf6 g5 14. Rb1 Kg7 15. Rb8 Rc8 16. Nh5 Kf7 17. O-O g4 18. Nf6 g3 19. fxg3 d5 20. Rxc8 f4 21. Rb1 f3 22. gxf3 Kg6 23. Rb8 Kg5 24. Rg8 - Sep 20 13:06 Solved: WHITE_WIN via MATE_PVview
1. Nh3 f6 2. Nc3 h6 … f3 22. gxf3 Kg6 23. Rb8 Kg5
1. Nh3 f6 2. Nc3 h6 3. Nd5 e6 4. e3 Na6 5. Nxc7 Ne7 6. Qh5 g6 7. Qb5 Ng8 8. Qxb7 Be7 9. b4 Kf8 10. Bb5 f5 11. Bb2 Bxb4 12. Nf4 Nf6 13. Bxf6 g5 14. Rb1 Kg7 15. Rb8 Rc8 16. Nh5 Kf7 17. O-O g4 18. Nf6 g3 19. fxg3 d5 20. Rxc8 f4 21. Rb1 f3 22. gxf3 Kg6 23. Rb8 Kg5 - Sep 20 13:06 Solved: WHITE_WIN via MATE_PVview
1. Nh3 f6 2. Nc3 h6 … 21. Rb1 f3 22. gxf3 Kg6 23. Rb8
1. Nh3 f6 2. Nc3 h6 3. Nd5 e6 4. e3 Na6 5. Nxc7 Ne7 6. Qh5 g6 7. Qb5 Ng8 8. Qxb7 Be7 9. b4 Kf8 10. Bb5 f5 11. Bb2 Bxb4 12. Nf4 Nf6 13. Bxf6 g5 14. Rb1 Kg7 15. Rb8 Rc8 16. Nh5 Kf7 17. O-O g4 18. Nf6 g3 19. fxg3 d5 20. Rxc8 f4 21. Rb1 f3 22. gxf3 Kg6 23. Rb8