80.3M
positions
15.5M
practically solved
290.54T
engine nodes
2.2M
analyses
3,524
in queue
6
active workers
34
active cores
4.4M
nodes / sec
12.1
positions / min
82
proof number
4,106
disproof number
Root conquest: 0/20 first moves solved · 19.3% of tree positions solved · last 24h: 311,453 closures, 4.59T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 over 219 open obligations, of which 41 (18.7%) 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 1.5h (median of 71) · measured at 2026-10-09 23:00 UTC
Closures by source, last 24h (311453 of 311453 labelled): USER 100.0% (311393) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.0% (60) · last 7d (1703079 of 1703079): USER 99.0% (1686245) · FILL 0.1% (2071) · AUTO 0.7% (11952) · SOLVE 0.0% (0) · NONE 0.2% (2811). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nf3 d6 2. Ng5 f5 … 15. Bf6 c5 16. Qd2 Nc7 17. a4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 c6 … 11. Nf5 exf5 12. Re1 Bb4 13. c3 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. e4 e6 … 20. f5 Rfc8 21. Ra6 Be1 22. Bf4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. e4 e6 … 20. f5 Rfc8 21. Ra6 Be1 22. Be3 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 c6 … exf5 12. Re1 Bb4 13. c3 Ne7 (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 | 1108 | 2 | |
| g1h3 | unsolved | 820 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| e2e4 | unsolved | 400 | 2 | |
| d2d4 | unsolved | 379 | 2 | |
| b1c3 | unsolved | 127 | 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 | Torom 41.1% of the fleet | 1.89T | 12,733 |
| 2 | BManBJ 32.8% of the fleet | 1.51T | 9,811 |
| 3 | randomchampgamer 14.3% of the fleet | 657.47B | 4,968 |
| 4 | RickEdinson 9.4% of the fleet | 434.18B | 2,802 |
| 5 | MoNiKaMaDnEsS 2.3% of the fleet | 107.50B | 662 |
| 6 | soothdest <0.1% of the fleet | 8.0M | 17 |
6 accounts · 4.59T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 31.1% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 15.3% of the fleet | 44.49T | 311,032 |
| 3 | tenzink 14.7% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.8% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 5.8% of the fleet | 16.91T | 124,017 |
| 6 | RickEdinson 3.9% of the fleet | 11.23T | 74,900 |
| 7 | JackIV 3.5% of the fleet | 10.06T | 67,859 |
| 8 | Torom 3.2% of the fleet | 9.26T | 68,482 |
| 9 | gannet 2.5% of the fleet | 7.24T | 46,848 |
| 10 | MoNiKaMaDnEsS 2.2% of the fleet | 6.31T | 42,670 |
and 25 more.
35 accounts · 290.63T 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 22 proposals · see every proposal
Milestones
- Oct 09 23:57 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Na6 13. a3 Kf7 14. Be7 h4
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 e6 8. Nxh8 b6 9. Bg5 g6 10. c4 f4 11. O-O a5 12. h3 Na6 13. a3 Kf7 14. Be7 h4 - Oct 09 23:57 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Na6 13. a3 Kf7 14. Be7 a4
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 e6 8. Nxh8 b6 9. Bg5 g6 10. c4 f4 11. O-O a5 12. h3 Na6 13. a3 Kf7 14. Be7 a4 - Oct 09 23:57 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Na6 13. a3 Kf7 14. Be7 f3
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 e6 8. Nxh8 b6 9. Bg5 g6 10. c4 f4 11. O-O a5 12. h3 Na6 13. a3 Kf7 14. Be7 f3 - Oct 09 23:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … d5 12. Qh5 Ke7 13. Qf7 Kd6
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. O-O Bc5 8. h3 d6 9. Kh1 h6 10. Nh4 g6 11. Nxg6 d5 12. Qh5 Ke7 13. Qf7 Kd6 - Oct 09 23:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 11. Nxg6 d5 12. Qh5 Ke7 13. Qf7
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. O-O Bc5 8. h3 d6 9. Kh1 h6 10. Nh4 g6 11. Nxg6 d5 12. Qh5 Ke7 13. Qf7 - Oct 09 23:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … g6 11. Nxg6 d5 12. Qh5 Ke7
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. O-O Bc5 8. h3 d6 9. Kh1 h6 10. Nh4 g6 11. Nxg6 d5 12. Qh5 Ke7 - Oct 09 23:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 10. Nh4 g6 11. Nxg6 d5 12. Qh5
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. O-O Bc5 8. h3 d6 9. Kh1 h6 10. Nh4 g6 11. Nxg6 d5 12. Qh5 - Oct 09 23:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … h6 10. Nh4 g6 11. Nxg6 d5
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. O-O Bc5 8. h3 d6 9. Kh1 h6 10. Nh4 g6 11. Nxg6 d5 - Oct 09 23:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … axb5 12. Qh5 Kd7 13. Qf7 Ne7
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. O-O Bc5 8. h3 d6 9. Kh1 h6 10. Nh4 g6 11. Nxg6 axb5 12. Qh5 Kd7 13. Qf7 Ne7 - Oct 09 23:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 11. Nxg6 axb5 12. Qh5 Kd7 13. Qf7
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. O-O Bc5 8. h3 d6 9. Kh1 h6 10. Nh4 g6 11. Nxg6 axb5 12. Qh5 Kd7 13. Qf7 - Oct 09 23:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … g6 11. Nxg6 axb5 12. Qh5 Kd7
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. O-O Bc5 8. h3 d6 9. Kh1 h6 10. Nh4 g6 11. Nxg6 axb5 12. Qh5 Kd7 - Oct 09 23:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 10. Nh4 g6 11. Nxg6 axb5 12. Qh5
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. O-O Bc5 8. h3 d6 9. Kh1 h6 10. Nh4 g6 11. Nxg6 axb5 12. Qh5