81.7M
positions
15.7M
practically solved
297.69T
engine nodes
2.3M
analyses
4,135
in queue
4
active workers
26
active cores
11.9M
nodes / sec
7.2
positions / min
85
proof number
4,552
disproof number
Root conquest: 0/20 first moves solved · 19.2% of tree positions solved · last 24h: 102,288 closures, 4.19T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 70 over 218 open obligations, of which 41 (18.8%) 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 2.6m (median of 21) · measured at 2026-10-11 18:00 UTC
Closures by source, last 24h (102288 of 102288 labelled): USER 82.8% (84665) · FILL 0.6% (625) · AUTO 16.6% (16931) · SOLVE 0.0% (0) · NONE 0.1% (67) · last 7d (1622620 of 1622620): USER 98.0% (1589959) · FILL 0.2% (2696) · AUTO 1.8% (28883) · SOLVE 0.0% (0) · NONE 0.1% (1082). 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 Nh6 … 17. dxc6 Bc5 18. Kh1 Bd4 19. Nb5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 Nh6 … Nd7 17. dxc6 Bc5 18. Kh1 Bd4 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. Ne5 fxe5 … 9. gxh3 g6 10. Bg5 Nf6 11. Qe2 (User) · 128.0M nodes · randomchampgamer-2026PC-atomicdb
- 1. Nh3 d5 2. Nc3 h6 … Qd6 19. c4 Qc7 20. Qd2 Rb8 (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 | 1133 | 2 | |
| g1h3 | unsolved | 753 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| e2e4 | unsolved | 400 | 2 | |
| d2d4 | unsolved | 389 | 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 46.3% of the fleet | 1.94T | 14,165 |
| 2 | BManBJ 27.9% of the fleet | 1.17T | 9,657 |
| 3 | randomchampgamer 13.8% of the fleet | 576.81B | 3,668 |
| 4 | RickEdinson 9.3% of the fleet | 387.87B | 2,953 |
| 5 | MoNiKaMaDnEsS 2.7% of the fleet | 114.56B | 1,690 |
5 accounts · 4.19T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 30.3% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 15.7% of the fleet | 46.66T | 325,174 |
| 3 | tenzink 14.4% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.5% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 6.0% of the fleet | 18.01T | 129,801 |
| 6 | RickEdinson 4.0% of the fleet | 11.97T | 79,283 |
| 7 | Torom 4.0% of the fleet | 11.88T | 87,075 |
| 8 | JackIV 3.4% of the fleet | 10.06T | 67,859 |
| 9 | gannet 2.4% of the fleet | 7.24T | 46,848 |
| 10 | MoNiKaMaDnEsS 2.3% of the fleet | 6.80T | 46,031 |
and 25 more.
35 accounts · 297.75T 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 11 18:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Bc5 17. Kh1 h6 18. Rd8 Ke7
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 f5 6. h4 fxg4 7. Bxh6 Bb4 8. e5 Rf8 9. f4 d6 10. Qf3 dxe5 11. Bh3 Qa5 12. Rd1 Qh5 13. d5 Rxf4 14. O-O Qf3 15. Rxf3 Nd7 16. dxc6 Bc5 17. Kh1 h6 18. Rd8 Ke7 - Oct 11 18:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 16. dxc6 Bc5 17. Kh1 h6 18. Rd8
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 f5 6. h4 fxg4 7. Bxh6 Bb4 8. e5 Rf8 9. f4 d6 10. Qf3 dxe5 11. Bh3 Qa5 12. Rd1 Qh5 13. d5 Rxf4 14. O-O Qf3 15. Rxf3 Nd7 16. dxc6 Bc5 17. Kh1 h6 18. Rd8 - Oct 11 18:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Nd7 16. dxc6 Bc5 17. Kh1 h6
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 f5 6. h4 fxg4 7. Bxh6 Bb4 8. e5 Rf8 9. f4 d6 10. Qf3 dxe5 11. Bh3 Qa5 12. Rd1 Qh5 13. d5 Rxf4 14. O-O Qf3 15. Rxf3 Nd7 16. dxc6 Bc5 17. Kh1 h6 - Oct 11 18:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Bc5 17. Kh1 a5 18. Rd8 Ke7
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 f5 6. h4 fxg4 7. Bxh6 Bb4 8. e5 Rf8 9. f4 d6 10. Qf3 dxe5 11. Bh3 Qa5 12. Rd1 Qh5 13. d5 Rxf4 14. O-O Qf3 15. Rxf3 Nd7 16. dxc6 Bc5 17. Kh1 a5 18. Rd8 Ke7 - Oct 11 18:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 16. dxc6 Bc5 17. Kh1 a5 18. Rd8
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 f5 6. h4 fxg4 7. Bxh6 Bb4 8. e5 Rf8 9. f4 d6 10. Qf3 dxe5 11. Bh3 Qa5 12. Rd1 Qh5 13. d5 Rxf4 14. O-O Qf3 15. Rxf3 Nd7 16. dxc6 Bc5 17. Kh1 a5 18. Rd8 - Oct 11 18:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Nd7 16. dxc6 Bc5 17. Kh1 a5
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 f5 6. h4 fxg4 7. Bxh6 Bb4 8. e5 Rf8 9. f4 d6 10. Qf3 dxe5 11. Bh3 Qa5 12. Rd1 Qh5 13. d5 Rxf4 14. O-O Qf3 15. Rxf3 Nd7 16. dxc6 Bc5 17. Kh1 a5 - Oct 11 18:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Ke7 20. Re8 Kf7 21. Re7 Kf8
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 f5 6. h4 fxg4 7. Bxh6 Bb4 8. e5 Rf8 9. f4 d6 10. Qf3 dxe5 11. Bh3 Qa5 12. Rd1 Qh5 13. d5 Rxf4 14. O-O Qf3 15. Rxf3 Nd7 16. dxc6 Bc5 17. Kh1 e5 18. Rd8 Kf7 19. Rf8 Ke7 20. Re8 Kf7 21. Re7 Kf8 - Oct 11 18:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 19. Rf8 Ke7 20. Re8 Kf7 21. Re7
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 f5 6. h4 fxg4 7. Bxh6 Bb4 8. e5 Rf8 9. f4 d6 10. Qf3 dxe5 11. Bh3 Qa5 12. Rd1 Qh5 13. d5 Rxf4 14. O-O Qf3 15. Rxf3 Nd7 16. dxc6 Bc5 17. Kh1 e5 18. Rd8 Kf7 19. Rf8 Ke7 20. Re8 Kf7 21. Re7 - Oct 11 18:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Kf7 19. Rf8 Ke7 20. Re8 Kf7
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 f5 6. h4 fxg4 7. Bxh6 Bb4 8. e5 Rf8 9. f4 d6 10. Qf3 dxe5 11. Bh3 Qa5 12. Rd1 Qh5 13. d5 Rxf4 14. O-O Qf3 15. Rxf3 Nd7 16. dxc6 Bc5 17. Kh1 e5 18. Rd8 Kf7 19. Rf8 Ke7 20. Re8 Kf7 - Oct 11 18:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 18. Rd8 Kf7 19. Rf8 Ke7 20. Re8
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 f5 6. h4 fxg4 7. Bxh6 Bb4 8. e5 Rf8 9. f4 d6 10. Qf3 dxe5 11. Bh3 Qa5 12. Rd1 Qh5 13. d5 Rxf4 14. O-O Qf3 15. Rxf3 Nd7 16. dxc6 Bc5 17. Kh1 e5 18. Rd8 Kf7 19. Rf8 Ke7 20. Re8 - Oct 11 18:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … e5 18. Rd8 Kf7 19. Rf8 Ke7
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 f5 6. h4 fxg4 7. Bxh6 Bb4 8. e5 Rf8 9. f4 d6 10. Qf3 dxe5 11. Bh3 Qa5 12. Rd1 Qh5 13. d5 Rxf4 14. O-O Qf3 15. Rxf3 Nd7 16. dxc6 Bc5 17. Kh1 e5 18. Rd8 Kf7 19. Rf8 Ke7 - Oct 11 18:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 17. Kh1 e5 18. Rd8 Kf7 19. Rf8
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 f5 6. h4 fxg4 7. Bxh6 Bb4 8. e5 Rf8 9. f4 d6 10. Qf3 dxe5 11. Bh3 Qa5 12. Rd1 Qh5 13. d5 Rxf4 14. O-O Qf3 15. Rxf3 Nd7 16. dxc6 Bc5 17. Kh1 e5 18. Rd8 Kf7 19. Rf8