71.0M
positions
13.0M
practically solved
255.15T
engine nodes
2.0M
analyses
3,683
in queue
17
active workers
94
active cores
22.4M
nodes / sec
29.7
positions / min
82
proof number
3,797
disproof number
Root conquest: 0/20 first moves solved · 18.3% of tree positions solved · last 24h: 490,133 closures, 7.19T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 81 over 199 open obligations, of which 30 (15.1%) 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 2.3h (median of 120) · measured at 2026-10-01 11:00 UTC
Closures by source, last 24h (489999 of 490036 labelled): USER 99.9% (489544) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.1% (455) · last 7d (2638211 of 2638308): USER 98.3% (2594131) · FILL 0.3% (8795) · AUTO 1.2% (32065) · SOLVE 0.0% (0) · NONE 0.1% (3220). 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 … 19. Ne6 Kg8 20. Nf2 a4 21. Nxg5 (User) · 128.0M nodes · auranvesdranor-admin-835912-atomicdb
- 1. Nh3 e6 2. e3 g6 … 19. Ne6 Kg8 20. Nf2 a4 21. Nf4 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 f6 2. Ne5 fxe5 … 19. Be2 Kh6 20. Bf3 Rf6 21. b4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nh3 e6 2. e3 g6 … 19. Ne6 Kg8 20. Nf2 a4 21. Nc5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. Ne5 fxe5 … 19. Be2 Kh6 20. Rb1 Rf6 21. Bf3 (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 | 1101 | 2 | |
| g1h3 | unsolved | 792 | 2 | |
| e2e3 | unsolved | 457 | 3 | |
| d2d4 | unsolved | 434 | 2 | |
| e2e4 | unsolved | 417 | 2 | |
| b1c3 | unsolved | 187 | 2 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b2b4 | unsolved | 0 | 3 | |
| b1a3 | unsolved | 0 | 3 | |
| h2h3 | unsolved | -98 | 2 | |
| d2d3 | unsolved | -116 | 2 | |
| f2f3 | unsolved | -117 | 3 | |
| a2a3 | unsolved | -127 | 2 | |
| b2b3 | unsolved | -169 | 1 | |
| f2f4 | unsolved | -302 | 3 | |
| h2h4 | unsolved | -500 | 2 | |
| a2a4 | unsolved | -510 | 2 | |
| g2g4 | unsolved | -602 | 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 | gannet 37.9% of the fleet | 2.72T | 20,909 |
| 2 | BManBJ 20.2% of the fleet | 1.45T | 11,246 |
| 3 | auranvesdranor 14.5% of the fleet | 1.04T | 7,917 |
| 4 | randomchampgamer 8.6% of the fleet | 619.13B | 4,979 |
| 5 | tenzink 8.3% of the fleet | 598.71B | 4,282 |
| 6 | RickEdinson 5.0% of the fleet | 358.52B | 2,556 |
| 7 | MoNiKaMaDnEsS 4.7% of the fleet | 341.30B | 2,640 |
| 8 | quasa 0.8% of the fleet | 54.11B | 417 |
| 9 | soothdest <0.1% of the fleet | 1.47B | 35 |
9 accounts · 7.19T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 35.4% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.1% of the fleet | 38.46T | 319,405 |
| 3 | BManBJ 12.5% of the fleet | 31.89T | 223,055 |
| 4 | auranvesdranor 11.7% of the fleet | 29.98T | 217,099 |
| 5 | randomchampgamer 4.4% of the fleet | 11.31T | 83,837 |
| 6 | JackIV 3.9% of the fleet | 10.06T | 67,859 |
| 7 | RickEdinson 2.9% of the fleet | 7.32T | 48,750 |
| 8 | gannet 2.8% of the fleet | 7.24T | 46,848 |
| 9 | MoNiKaMaDnEsS 1.9% of the fleet | 4.87T | 32,119 |
| 10 | NeoArcturus 1.6% of the fleet | 4.09T | 16,758 |
and 25 more.
35 accounts · 255.33T 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
- Is Nh3 h6 e3 e6 Nc3 a draw?1. Nh3 e6 2. e3 h6 3. Nc3proposed by soothdest · 4 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
Showing the 6 most voted of 21 proposals · see every proposal
Milestones
- Oct 01 11:52 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nc3 g6 … Bf8 12. e4 Ra8 13. Be8 dxe4
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kd8 9. d4 Bb4 10. c3 Rc8 11. Qe2 Bf8 12. e4 Ra8 13. Be8 dxe4 - Oct 01 11:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … Kc8 16. Qe8 Kc7 17. Qd7 Kb8
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kd8 9. d4 Bb4 10. c3 Rc8 11. Qe2 Bf8 12. e4 Ra8 13. Be8 dxe4 14. Bf7 a6 15. Bxe6 Kc8 16. Qe8 Kc7 17. Qd7 Kb8 - Oct 01 11:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 15. Bxe6 Kc8 16. Qe8 Kc7 17. Qd7
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kd8 9. d4 Bb4 10. c3 Rc8 11. Qe2 Bf8 12. e4 Ra8 13. Be8 dxe4 14. Bf7 a6 15. Bxe6 Kc8 16. Qe8 Kc7 17. Qd7 - Oct 01 11:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … a6 15. Bxe6 Kc8 16. Qe8 Kc7
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kd8 9. d4 Bb4 10. c3 Rc8 11. Qe2 Bf8 12. e4 Ra8 13. Be8 dxe4 14. Bf7 a6 15. Bxe6 Kc8 16. Qe8 Kc7 - Oct 01 11:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 14. Bf7 a6 15. Bxe6 Kc8 16. Qe8
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kd8 9. d4 Bb4 10. c3 Rc8 11. Qe2 Bf8 12. e4 Ra8 13. Be8 dxe4 14. Bf7 a6 15. Bxe6 Kc8 16. Qe8 - Oct 01 11:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … dxe4 14. Bf7 a6 15. Bxe6 Kc8
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kd8 9. d4 Bb4 10. c3 Rc8 11. Qe2 Bf8 12. e4 Ra8 13. Be8 dxe4 14. Bf7 a6 15. Bxe6 Kc8 - Oct 01 11:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 13. Be8 dxe4 14. Bf7 a6 15. Bxe6
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kd8 9. d4 Bb4 10. c3 Rc8 11. Qe2 Bf8 12. e4 Ra8 13. Be8 dxe4 14. Bf7 a6 15. Bxe6 - Oct 01 11:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … Ra8 13. Be8 dxe4 14. Bf7 a6
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kd8 9. d4 Bb4 10. c3 Rc8 11. Qe2 Bf8 12. e4 Ra8 13. Be8 dxe4 14. Bf7 a6 - Oct 01 11:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 12. e4 Ra8 13. Be8 dxe4 14. Bf7
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kd8 9. d4 Bb4 10. c3 Rc8 11. Qe2 Bf8 12. e4 Ra8 13. Be8 dxe4 14. Bf7 - Oct 01 11:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … Bd6 16. Qb7 Bg3 17. fxg3 e5
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kd8 9. d4 Bb4 10. c3 Rc8 11. Qe2 Bf8 12. e4 Ra8 13. Be8 dxe4 14. Bxg6 b5 15. Qe4 Bd6 16. Qb7 Bg3 17. fxg3 e5 - Oct 01 11:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 15. Qe4 Bd6 16. Qb7 Bg3 17. fxg3
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kd8 9. d4 Bb4 10. c3 Rc8 11. Qe2 Bf8 12. e4 Ra8 13. Be8 dxe4 14. Bxg6 b5 15. Qe4 Bd6 16. Qb7 Bg3 17. fxg3 - Oct 01 11:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … b5 15. Qe4 Bd6 16. Qb7 Bg3
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kd8 9. d4 Bb4 10. c3 Rc8 11. Qe2 Bf8 12. e4 Ra8 13. Be8 dxe4 14. Bxg6 b5 15. Qe4 Bd6 16. Qb7 Bg3