86.0M
positions
16.4M
practically solved
316.67T
engine nodes
2.4M
analyses
98
in queue
13
active workers
60
active cores
14.5M
nodes / sec
32.8
positions / min
145
proof number
4,661
disproof number
Root conquest: 0/20 first moves solved · 19.0% of tree positions solved · last 24h: 37,614 closures, 3.33T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 70 over 209 open obligations, of which 38 (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 3.6m (median of 3) · measured at 2026-10-18 02:00 UTC
Closures by source, last 24h (37614 of 37614 labelled): USER 90.4% (33987) · FILL 0.9% (329) · AUTO 8.5% (3199) · SOLVE 0.0% (0) · NONE 0.3% (99) · last 7d (653500 of 653500): USER 86.0% (562064) · FILL 1.1% (7225) · AUTO 12.8% (83676) · SOLVE 0.0% (0) · NONE 0.1% (535). 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 … 10. f5 h6 11. b3 b6 12. Kd2 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … 20. Rh5 Ke5 21. Re1 Rg8 22. Rh8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. e4 e6 … Ke5 21. Rf1 Rg8 22. Rh8 Bh6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. e4 e6 … 21. Rh5 Kf4 22. g5 Bb7 23. Rh4 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … 22. Rc1 Bh6 23. g5 Bb7 24. Ke1 (User) · 128.0M 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 | 1112 | 2 | |
| g1h3 | unsolved | 821 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 400 | 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 | BManBJ 44.5% of the fleet | 1.48T | 6,831 |
| 2 | Torom 38.2% of the fleet | 1.27T | 8,336 |
| 3 | RickEdinson 14.2% of the fleet | 473.80B | 2,303 |
| 4 | MoNiKaMaDnEsS 3.0% of the fleet | 101.23B | 468 |
| 5 | soothdest <0.1% of the fleet | 256.7M | 3 |
5 accounts · 3.33T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 28.5% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 17.2% of the fleet | 54.45T | 382,950 |
| 3 | tenzink 13.5% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 9.9% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 6.3% of the fleet | 19.85T | 140,897 |
| 6 | Torom 5.4% of the fleet | 16.97T | 121,689 |
| 7 | RickEdinson 4.6% of the fleet | 14.69T | 98,305 |
| 8 | JackIV 3.2% of the fleet | 10.06T | 67,859 |
| 9 | MoNiKaMaDnEsS 2.7% of the fleet | 8.48T | 58,201 |
| 10 | gannet 2.3% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 316.86T 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 18 02:48 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … e5 22. Qg6 Ke7 23. Qf7 Kd6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 Bg6 9. f4 e6 10. f5 h6 11. b3 b6 12. Kf1 cxb5 13. Nc3 Be7 14. Nd5 Nxd5 15. Qf3 d5 16. f6 Bd6 17. Nd8 b5 18. Bb2 d4 19. fxg7 Bf4 20. Qb7 Bc7 21. Qe4 e5 22. Qg6 Ke7 23. Qf7 Kd6 - Oct 18 02:48 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 21. Qe4 e5 22. Qg6 Ke7 23. Qf7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 Bg6 9. f4 e6 10. f5 h6 11. b3 b6 12. Kf1 cxb5 13. Nc3 Be7 14. Nd5 Nxd5 15. Qf3 d5 16. f6 Bd6 17. Nd8 b5 18. Bb2 d4 19. fxg7 Bf4 20. Qb7 Bc7 21. Qe4 e5 22. Qg6 Ke7 23. Qf7 - Oct 18 02:48 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Bc7 21. Qe4 e5 22. Qg6 Ke7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 Bg6 9. f4 e6 10. f5 h6 11. b3 b6 12. Kf1 cxb5 13. Nc3 Be7 14. Nd5 Nxd5 15. Qf3 d5 16. f6 Bd6 17. Nd8 b5 18. Bb2 d4 19. fxg7 Bf4 20. Qb7 Bc7 21. Qe4 e5 22. Qg6 Ke7 - Oct 18 02:48 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 20. Qb7 Bc7 21. Qe4 e5 22. Qg6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 Bg6 9. f4 e6 10. f5 h6 11. b3 b6 12. Kf1 cxb5 13. Nc3 Be7 14. Nd5 Nxd5 15. Qf3 d5 16. f6 Bd6 17. Nd8 b5 18. Bb2 d4 19. fxg7 Bf4 20. Qb7 Bc7 21. Qe4 e5 22. Qg6 - Oct 18 02:48 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Bf4 20. Qb7 Bc7 21. Qe4 e5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 Bg6 9. f4 e6 10. f5 h6 11. b3 b6 12. Kf1 cxb5 13. Nc3 Be7 14. Nd5 Nxd5 15. Qf3 d5 16. f6 Bd6 17. Nd8 b5 18. Bb2 d4 19. fxg7 Bf4 20. Qb7 Bc7 21. Qe4 e5 - Oct 18 02:48 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 19. fxg7 Bf4 20. Qb7 Bc7 21. Qe4
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 Bg6 9. f4 e6 10. f5 h6 11. b3 b6 12. Kf1 cxb5 13. Nc3 Be7 14. Nd5 Nxd5 15. Qf3 d5 16. f6 Bd6 17. Nd8 b5 18. Bb2 d4 19. fxg7 Bf4 20. Qb7 Bc7 21. Qe4 - Oct 18 02:48 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … d4 19. fxg7 Bf4 20. Qb7 Bc7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 Bg6 9. f4 e6 10. f5 h6 11. b3 b6 12. Kf1 cxb5 13. Nc3 Be7 14. Nd5 Nxd5 15. Qf3 d5 16. f6 Bd6 17. Nd8 b5 18. Bb2 d4 19. fxg7 Bf4 20. Qb7 Bc7 - Oct 18 02:48 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 18. Bb2 d4 19. fxg7 Bf4 20. Qb7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 Bg6 9. f4 e6 10. f5 h6 11. b3 b6 12. Kf1 cxb5 13. Nc3 Be7 14. Nd5 Nxd5 15. Qf3 d5 16. f6 Bd6 17. Nd8 b5 18. Bb2 d4 19. fxg7 Bf4 20. Qb7 - Oct 18 02:48 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … b5 18. Bb2 d4 19. fxg7 Bf4
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 Bg6 9. f4 e6 10. f5 h6 11. b3 b6 12. Kf1 cxb5 13. Nc3 Be7 14. Nd5 Nxd5 15. Qf3 d5 16. f6 Bd6 17. Nd8 b5 18. Bb2 d4 19. fxg7 Bf4 - Oct 18 02:48 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 17. Nd8 b5 18. Bb2 d4 19. fxg7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 Bg6 9. f4 e6 10. f5 h6 11. b3 b6 12. Kf1 cxb5 13. Nc3 Be7 14. Nd5 Nxd5 15. Qf3 d5 16. f6 Bd6 17. Nd8 b5 18. Bb2 d4 19. fxg7 - Oct 18 02:48 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Bd6 17. Nd8 b5 18. Bb2 d4
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 Bg6 9. f4 e6 10. f5 h6 11. b3 b6 12. Kf1 cxb5 13. Nc3 Be7 14. Nd5 Nxd5 15. Qf3 d5 16. f6 Bd6 17. Nd8 b5 18. Bb2 d4 - Oct 18 02:48 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 16. f6 Bd6 17. Nd8 b5 18. Bb2
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 Bg6 9. f4 e6 10. f5 h6 11. b3 b6 12. Kf1 cxb5 13. Nc3 Be7 14. Nd5 Nxd5 15. Qf3 d5 16. f6 Bd6 17. Nd8 b5 18. Bb2