88.9M
positions
17.0M
practically solved
327.64T
engine nodes
2.5M
analyses
375
in queue
5
active workers
28
active cores
5.5M
nodes / sec
12.4
positions / min
143
proof number
4,658
disproof number
Root conquest: 0/20 first moves solved · 19.1% of tree positions solved · last 24h: 349,635 closures, 5.39T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 70 over 203 open obligations, of which 37 (18.2%) 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 2.3m (median of 139) · measured at 2026-10-20 00:00 UTC
Closures by source, last 24h (349571 of 349571 labelled): USER 98.9% (345592) · FILL 0.2% (533) · AUTO 0.3% (1002) · SOLVE 0.0% (0) · NONE 0.7% (2444) · last 7d (1104822 of 1104886): USER 93.0% (1027069) · FILL 0.7% (7648) · AUTO 6.1% (67149) · SOLVE 0.0% (0) · NONE 0.3% (2956). 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 … e6 13. e5 Ng7 14. Qe2 Rb8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … e6 13. e5 Ng7 14. Qe2 Re8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … e6 13. e5 Ng7 14. Qe2 Rf8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 d6 2. Ng5 f5 … e6 13. e5 Ng7 14. Qe2 Rc8 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … 18. Bxa6 a5 19. e5 d5 20. O-O (User) · 512.0M nodes · RickEdinson-MSI-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 | 1158 | 2 | |
| g1h3 | unsolved | 821 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 401 | 2 | |
| e2e4 | unsolved | 400 | 2 | |
| b1c3 | unsolved | 138 | 2 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b1a3 | unsolved | 0 | 3 | |
| b2b4 | unsolved | -65 | 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 57.9% of the fleet | 3.12T | 22,746 |
| 2 | BManBJ 30.2% of the fleet | 1.63T | 12,250 |
| 3 | RickEdinson 7.7% of the fleet | 413.59B | 2,555 |
| 4 | MoNiKaMaDnEsS 4.3% of the fleet | 230.93B | 1,758 |
4 accounts · 5.39T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 27.6% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 17.6% of the fleet | 57.63T | 406,292 |
| 3 | tenzink 13.1% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 9.6% of the fleet | 31.40T | 228,002 |
| 5 | Torom 7.2% of the fleet | 23.48T | 167,251 |
| 6 | randomchampgamer 6.1% of the fleet | 19.85T | 140,897 |
| 7 | RickEdinson 4.7% of the fleet | 15.54T | 103,546 |
| 8 | JackIV 3.1% of the fleet | 10.06T | 67,859 |
| 9 | MoNiKaMaDnEsS 2.7% of the fleet | 8.77T | 60,417 |
| 10 | gannet 2.2% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 327.72T 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 · 18 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 23 proposals · see every proposal
Milestones
- Oct 20 01:02 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … e6 13. e5 Ng7 14. Qe2 Kf8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Kf8 10. Bxh6 Ne8 11. Nc3 Kg8 12. Bb5 e6 13. e5 Ng7 14. Qe2 Kf8 - Oct 20 01:02 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … f4 20. Qd3 bxc6 21. Qg6 Kh8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Kf8 10. Bxh6 Ne8 11. Nc3 Kg8 12. Bb5 e6 13. e5 Ng7 14. Qe2 Kf8 15. Nd5 Rd8 16. Ne7 a6 17. Nxg6 Rc8 18. Bc6 Kg7 19. Qe3 f4 20. Qd3 bxc6 21. Qg6 Kh8 - Oct 20 01:02 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 19. Qe3 f4 20. Qd3 bxc6 21. Qg6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Kf8 10. Bxh6 Ne8 11. Nc3 Kg8 12. Bb5 e6 13. e5 Ng7 14. Qe2 Kf8 15. Nd5 Rd8 16. Ne7 a6 17. Nxg6 Rc8 18. Bc6 Kg7 19. Qe3 f4 20. Qd3 bxc6 21. Qg6 - Oct 20 01:02 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Kg7 19. Qe3 f4 20. Qd3 bxc6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Kf8 10. Bxh6 Ne8 11. Nc3 Kg8 12. Bb5 e6 13. e5 Ng7 14. Qe2 Kf8 15. Nd5 Rd8 16. Ne7 a6 17. Nxg6 Rc8 18. Bc6 Kg7 19. Qe3 f4 20. Qd3 bxc6 - Oct 20 01:02 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 18. Bc6 Kg7 19. Qe3 f4 20. Qd3
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Kf8 10. Bxh6 Ne8 11. Nc3 Kg8 12. Bb5 e6 13. e5 Ng7 14. Qe2 Kf8 15. Nd5 Rd8 16. Ne7 a6 17. Nxg6 Rc8 18. Bc6 Kg7 19. Qe3 f4 20. Qd3 - Oct 20 01:02 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Rc8 18. Bc6 Kg7 19. Qe3 f4
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Kf8 10. Bxh6 Ne8 11. Nc3 Kg8 12. Bb5 e6 13. e5 Ng7 14. Qe2 Kf8 15. Nd5 Rd8 16. Ne7 a6 17. Nxg6 Rc8 18. Bc6 Kg7 19. Qe3 f4 - Oct 20 01:02 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 17. Nxg6 Rc8 18. Bc6 Kg7 19. Qe3
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Kf8 10. Bxh6 Ne8 11. Nc3 Kg8 12. Bb5 e6 13. e5 Ng7 14. Qe2 Kf8 15. Nd5 Rd8 16. Ne7 a6 17. Nxg6 Rc8 18. Bc6 Kg7 19. Qe3 - Oct 20 01:02 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … a6 17. Nxg6 Rc8 18. Bc6 Kg7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Kf8 10. Bxh6 Ne8 11. Nc3 Kg8 12. Bb5 e6 13. e5 Ng7 14. Qe2 Kf8 15. Nd5 Rd8 16. Ne7 a6 17. Nxg6 Rc8 18. Bc6 Kg7 - Oct 20 01:02 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 16. Ne7 a6 17. Nxg6 Rc8 18. Bc6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Kf8 10. Bxh6 Ne8 11. Nc3 Kg8 12. Bb5 e6 13. e5 Ng7 14. Qe2 Kf8 15. Nd5 Rd8 16. Ne7 a6 17. Nxg6 Rc8 18. Bc6 - Oct 20 01:02 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Rd8 16. Ne7 a6 17. Nxg6 Rc8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Kf8 10. Bxh6 Ne8 11. Nc3 Kg8 12. Bb5 e6 13. e5 Ng7 14. Qe2 Kf8 15. Nd5 Rd8 16. Ne7 a6 17. Nxg6 Rc8 - Oct 20 01:02 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 15. Nd5 Rd8 16. Ne7 a6 17. Nxg6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Kf8 10. Bxh6 Ne8 11. Nc3 Kg8 12. Bb5 e6 13. e5 Ng7 14. Qe2 Kf8 15. Nd5 Rd8 16. Ne7 a6 17. Nxg6 - Oct 20 01:02 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Kf8 15. Nd5 Rd8 16. Ne7 a6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Kf8 10. Bxh6 Ne8 11. Nc3 Kg8 12. Bb5 e6 13. e5 Ng7 14. Qe2 Kf8 15. Nd5 Rd8 16. Ne7 a6