75.8M
positions
14.2M
practically solved
272.84T
engine nodes
2.1M
analyses
2,931
in queue
9
active workers
48
active cores
23.0M
nodes / sec
17.0
positions / min
82
proof number
3,796
disproof number
Root conquest: 0/20 first moves solved · 18.8% of tree positions solved · last 24h: 231,257 closures, 3.69T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 68 over 218 open obligations, of which 42 (19.3%) 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 40.7m (median of 120) · measured at 2026-10-06 04:00 UTC
Closures by source, last 24h (231255 of 231255 labelled): USER 99.8% (230741) · FILL 0.1% (189) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.1% (325) · last 7d (2086600 of 2086602): USER 99.8% (2081668) · FILL 0.0% (189) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.2% (4743). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nf3 f6 2. Nc3 Na6 … 8. Nxh8 Be7 9. e3 Kf8 10. a4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … Ke5 30. cxb6 Kd4 31. Bf5 Be3 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. Nc3 Na6 … d5 8. Nxh8 f5 9. e4 h5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. Nc3 Na6 … d5 8. Nxh8 f5 9. e4 a5 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 Na6 … d5 8. Nxh8 f5 9. e4 g5 (User) · 128.0M nodes · randomchampgamer-2026PC-atomicdb
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 | 1026 | 2 | |
| g1h3 | unsolved | 820 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 441 | 2 | |
| e2e4 | unsolved | 418 | 2 | |
| b1c3 | unsolved | 105 | 2 | |
| b1a3 | unsolved | 0 | 3 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b2b4 | unsolved | -73 | 3 | |
| h2h3 | unsolved | -97 | 2 | |
| d2d3 | unsolved | -98 | 2 | |
| a2a3 | unsolved | -100 | 2 | |
| f2f3 | unsolved | -117 | 3 | |
| b2b3 | unsolved | -144 | 1 | |
| f2f4 | unsolved | -260 | 3 | |
| h2h4 | unsolved | -500 | 2 | |
| a2a4 | unsolved | -514 | 2 | |
| g2g4 | unsolved | -604 | 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 44.1% of the fleet | 1.62T | 9,840 |
| 2 | tenzink 19.1% of the fleet | 703.72B | 4,024 |
| 3 | randomchampgamer 18.4% of the fleet | 678.11B | 3,939 |
| 4 | RickEdinson 13.2% of the fleet | 488.17B | 2,817 |
| 5 | MoNiKaMaDnEsS 5.1% of the fleet | 189.40B | 1,201 |
| 6 | quasa 0.1% of the fleet | 3.35B | 27 |
| 7 | soothdest <0.1% of the fleet | 474.8M | 26 |
7 accounts · 3.69T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 33.1% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.3% of the fleet | 41.66T | 341,614 |
| 3 | BManBJ 14.2% of the fleet | 38.71T | 272,247 |
| 4 | auranvesdranor 11.5% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 5.3% of the fleet | 14.45T | 106,540 |
| 6 | JackIV 3.7% of the fleet | 10.06T | 67,859 |
| 7 | RickEdinson 3.5% of the fleet | 9.53T | 63,758 |
| 8 | gannet 2.7% of the fleet | 7.24T | 46,848 |
| 9 | MoNiKaMaDnEsS 2.0% of the fleet | 5.55T | 37,156 |
| 10 | NeoArcturus 1.5% of the fleet | 4.09T | 16,758 |
and 25 more.
35 accounts · 272.88T 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 · 17 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 · 5 votes
- The weaker of the two f-pawn advances for 1. ...d61. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4proposed by MoNiKaMaDnEsS · 4 votes
- Refuting 1... d61. Nf3 d6 2. Nc3proposed by randomchampgamer · 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 06 04:27 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f6 … f5 14. dxc6 Ke7 15. Qd7 Kf6
1. Nf3 d6 2. Ng5 f6 3. Na3 g6 4. Nb5 e6 5. Nxc7 h5 6. Nh7 Rxh7 7. d4 b5 8. Bh6 Bg7 9. e4 Bh8 10. Qf3 b4 11. Qb3 Rc8 12. Qa4 Rc6 13. d5 f5 14. dxc6 Ke7 15. Qd7 Kf6 - Oct 06 04:27 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f6 … 13. d5 f5 14. dxc6 Ke7 15. Qd7
1. Nf3 d6 2. Ng5 f6 3. Na3 g6 4. Nb5 e6 5. Nxc7 h5 6. Nh7 Rxh7 7. d4 b5 8. Bh6 Bg7 9. e4 Bh8 10. Qf3 b4 11. Qb3 Rc8 12. Qa4 Rc6 13. d5 f5 14. dxc6 Ke7 15. Qd7 - Oct 06 04:27 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f6 … Rc6 13. d5 f5 14. dxc6 Ke7
1. Nf3 d6 2. Ng5 f6 3. Na3 g6 4. Nb5 e6 5. Nxc7 h5 6. Nh7 Rxh7 7. d4 b5 8. Bh6 Bg7 9. e4 Bh8 10. Qf3 b4 11. Qb3 Rc8 12. Qa4 Rc6 13. d5 f5 14. dxc6 Ke7 - Oct 06 04:27 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f6 … 12. Qa4 Rc6 13. d5 f5 14. dxc6
1. Nf3 d6 2. Ng5 f6 3. Na3 g6 4. Nb5 e6 5. Nxc7 h5 6. Nh7 Rxh7 7. d4 b5 8. Bh6 Bg7 9. e4 Bh8 10. Qf3 b4 11. Qb3 Rc8 12. Qa4 Rc6 13. d5 f5 14. dxc6 - Oct 06 04:27 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f6 … Rc8 12. Qa4 Rc6 13. d5 f5
1. Nf3 d6 2. Ng5 f6 3. Na3 g6 4. Nb5 e6 5. Nxc7 h5 6. Nh7 Rxh7 7. d4 b5 8. Bh6 Bg7 9. e4 Bh8 10. Qf3 b4 11. Qb3 Rc8 12. Qa4 Rc6 13. d5 f5 - Oct 06 04:27 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f6 … 11. Qb3 Rc8 12. Qa4 Rc6 13. d5
1. Nf3 d6 2. Ng5 f6 3. Na3 g6 4. Nb5 e6 5. Nxc7 h5 6. Nh7 Rxh7 7. d4 b5 8. Bh6 Bg7 9. e4 Bh8 10. Qf3 b4 11. Qb3 Rc8 12. Qa4 Rc6 13. d5 - Oct 06 04:27 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f6 … b4 11. Qb3 Rc8 12. Qa4 Rc6
1. Nf3 d6 2. Ng5 f6 3. Na3 g6 4. Nb5 e6 5. Nxc7 h5 6. Nh7 Rxh7 7. d4 b5 8. Bh6 Bg7 9. e4 Bh8 10. Qf3 b4 11. Qb3 Rc8 12. Qa4 Rc6 - Oct 06 04:27 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f6 … 10. Qf3 b4 11. Qb3 Rc8 12. Qa4
1. Nf3 d6 2. Ng5 f6 3. Na3 g6 4. Nb5 e6 5. Nxc7 h5 6. Nh7 Rxh7 7. d4 b5 8. Bh6 Bg7 9. e4 Bh8 10. Qf3 b4 11. Qb3 Rc8 12. Qa4 - Oct 06 04:27 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f6 … Bh8 10. Qf3 b4 11. Qb3 Rc8
1. Nf3 d6 2. Ng5 f6 3. Na3 g6 4. Nb5 e6 5. Nxc7 h5 6. Nh7 Rxh7 7. d4 b5 8. Bh6 Bg7 9. e4 Bh8 10. Qf3 b4 11. Qb3 Rc8 - Oct 06 04:27 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f6 … 9. e4 Bh8 10. Qf3 b4 11. Qb3
1. Nf3 d6 2. Ng5 f6 3. Na3 g6 4. Nb5 e6 5. Nxc7 h5 6. Nh7 Rxh7 7. d4 b5 8. Bh6 Bg7 9. e4 Bh8 10. Qf3 b4 11. Qb3 - Oct 06 04:27 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f6 … Bg7 9. e4 Bh8 10. Qf3 b4
1. Nf3 d6 2. Ng5 f6 3. Na3 g6 4. Nb5 e6 5. Nxc7 h5 6. Nh7 Rxh7 7. d4 b5 8. Bh6 Bg7 9. e4 Bh8 10. Qf3 b4 - Oct 06 04:27 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f6 … 8. Bh6 Bg7 9. e4 Bh8 10. Qf3
1. Nf3 d6 2. Ng5 f6 3. Na3 g6 4. Nb5 e6 5. Nxc7 h5 6. Nh7 Rxh7 7. d4 b5 8. Bh6 Bg7 9. e4 Bh8 10. Qf3