53.8M
positions
8.3M
practically solved
195.35T
engine nodes
1.6M
analyses
3,079
in queue
11
active workers
72
active cores
24.9M
nodes / sec
22.0
positions / min
131
proof number
3,716
disproof number
Root conquest: 0/20 first moves solved · 15.5% of tree positions solved · last 24h: 337,300 closures, 4.76T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 72 over 164 open obligations, of which 30 (18.3%) 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 8.2h (median of 124) · measured at 2026-09-16 21:00 UTC
Closures by source, last 24h (337245 of 337300 labelled): USER 99.8% (336650) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.2% (595) · last 7d (1247579 of 1247579): USER 91.0% (1135109) · FILL 1.3% (16449) · AUTO 7.4% (92096) · SOLVE 0.0% (0) · NONE 0.3% (3925). 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 … Rc8 10. c4 h5 11. b5 a5 (User) · 128.0M nodes · auranvesdranor-admin-835912-atomicdb
- 1. Nh3 f6 2. Nc3 h6 … Rc8 10. c4 h5 11. b5 b6 (User) · 128.0M nodes · auranvesdranor-j-002-atomicdb
- 1. Nh3 f6 2. Nc3 h6 … Rc8 10. c4 h5 11. b5 a6 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 f6 2. Nd4 d6 … Be7 9. axb5 g6 10. e3 Nf7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. Nd4 d6 … g6 9. e3 Nf7 10. axb5 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 | 1079 | 2 | |
| g1h3 | unsolved | 820 | 2 | |
| e2e3 | unsolved | 502 | 3 | |
| e2e4 | unsolved | 409 | 2 | |
| d2d4 | unsolved | 408 | 2 | |
| b1c3 | unsolved | 74 | 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 31.6% of the fleet | 1.50T | 11,597 |
| 2 | BManBJ 28.7% of the fleet | 1.37T | 10,300 |
| 3 | tenzink 13.7% of the fleet | 653.33B | 4,074 |
| 4 | randomchampgamer 11.9% of the fleet | 565.83B | 4,451 |
| 5 | MoNiKaMaDnEsS 7.2% of the fleet | 341.08B | 2,184 |
| 6 | JackIV 5.1% of the fleet | 241.37B | 1,396 |
| 7 | NeoArcturus 1.8% of the fleet | 85.13B | 244 |
7 accounts · 4.76T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 40.7% of the fleet | 79.65T | 677,611 |
| 2 | tenzink 16.8% of the fleet | 32.86T | 282,620 |
| 3 | auranvesdranor 10.1% of the fleet | 19.78T | 140,598 |
| 4 | BManBJ 9.8% of the fleet | 19.19T | 127,833 |
| 5 | JackIV 4.1% of the fleet | 7.94T | 56,572 |
| 6 | RickEdinson 3.2% of the fleet | 6.32T | 41,667 |
| 7 | randomchampgamer 3.1% of the fleet | 6.14T | 43,011 |
| 8 | NeoArcturus 2.1% of the fleet | 4.09T | 16,751 |
| 9 | ijh 1.8% of the fleet | 3.57T | 37,348 |
| 10 | MoNiKaMaDnEsS 1.8% of the fleet | 3.45T | 21,978 |
and 22 more.
32 accounts · 195.46T 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 18 proposals · see every proposal
Milestones
- Sep 16 21:43 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nd4 d6 … g6 9. e3 Nf7 10. axb5 Ke7
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 Nh6 7. h3 b5 8. a4 g6 9. e3 Nf7 10. axb5 Ke7 - Sep 16 21:43 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 d6 … Ne4 15. Bxe4 Kf7 16. Qd7 Be7
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 Nh6 7. h3 b5 8. a4 g6 9. e3 Nf7 10. axb5 Ke7 11. Qe2 Ne5 12. Qb5 Nc4 13. d4 Nd2 14. Bd3 Ne4 15. Bxe4 Kf7 16. Qd7 Be7 - Sep 16 21:43 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 d6 … 14. Bd3 Ne4 15. Bxe4 Kf7 16. Qd7
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 Nh6 7. h3 b5 8. a4 g6 9. e3 Nf7 10. axb5 Ke7 11. Qe2 Ne5 12. Qb5 Nc4 13. d4 Nd2 14. Bd3 Ne4 15. Bxe4 Kf7 16. Qd7 - Sep 16 21:43 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 d6 … Nd2 14. Bd3 Ne4 15. Bxe4 Kf7
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 Nh6 7. h3 b5 8. a4 g6 9. e3 Nf7 10. axb5 Ke7 11. Qe2 Ne5 12. Qb5 Nc4 13. d4 Nd2 14. Bd3 Ne4 15. Bxe4 Kf7 - Sep 16 21:43 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 d6 … 13. d4 Nd2 14. Bd3 Ne4 15. Bxe4
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 Nh6 7. h3 b5 8. a4 g6 9. e3 Nf7 10. axb5 Ke7 11. Qe2 Ne5 12. Qb5 Nc4 13. d4 Nd2 14. Bd3 Ne4 15. Bxe4 - Sep 16 21:43 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 d6 … Nc4 13. d4 Nd2 14. Bd3 Ne4
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 Nh6 7. h3 b5 8. a4 g6 9. e3 Nf7 10. axb5 Ke7 11. Qe2 Ne5 12. Qb5 Nc4 13. d4 Nd2 14. Bd3 Ne4 - Sep 16 21:43 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 d6 … 12. Qb5 Nc4 13. d4 Nd2 14. Bd3
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 Nh6 7. h3 b5 8. a4 g6 9. e3 Nf7 10. axb5 Ke7 11. Qe2 Ne5 12. Qb5 Nc4 13. d4 Nd2 14. Bd3 - Sep 16 21:43 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 d6 … Ne5 12. Qb5 Nc4 13. d4 Nd2
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 Nh6 7. h3 b5 8. a4 g6 9. e3 Nf7 10. axb5 Ke7 11. Qe2 Ne5 12. Qb5 Nc4 13. d4 Nd2 - Sep 16 21:43 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 d6 … 11. Qe2 Ne5 12. Qb5 Nc4 13. d4
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 Nh6 7. h3 b5 8. a4 g6 9. e3 Nf7 10. axb5 Ke7 11. Qe2 Ne5 12. Qb5 Nc4 13. d4 - Sep 16 21:43 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 d6 … Ke7 11. Qe2 Ne5 12. Qb5 Nc4
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 Nh6 7. h3 b5 8. a4 g6 9. e3 Nf7 10. axb5 Ke7 11. Qe2 Ne5 12. Qb5 Nc4 - Sep 16 21:43 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 d6 … 10. axb5 Ke7 11. Qe2 Ne5 12. Qb5
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 Nh6 7. h3 b5 8. a4 g6 9. e3 Nf7 10. axb5 Ke7 11. Qe2 Ne5 12. Qb5 - Sep 16 21:43 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 d6 … Nf7 10. axb5 Ke7 11. Qe2 Ne5
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 Nh6 7. h3 b5 8. a4 g6 9. e3 Nf7 10. axb5 Ke7 11. Qe2 Ne5