75.6M
positions
14.2M
practically solved
271.57T
engine nodes
2.1M
analyses
5,130
in queue
9
active workers
48
active cores
7.6M
nodes / sec
14.6
positions / min
82
proof number
3,796
disproof number
Root conquest: 0/20 first moves solved · 18.7% of tree positions solved · last 24h: 231,121 closures, 3.30T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 67 over 216 open obligations, of which 42 (19.4%) 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 46s (median of 129) · measured at 2026-10-05 19:00 UTC
Closures by source, last 24h (231094 of 231094 labelled): USER 99.7% (230438) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.3% (656) · last 7d (2161857 of 2161859): USER 99.8% (2156801) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.2% (5056). 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 … 4. d4 g6 5. e4 Nf7 6. Bc4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. Ne5 fxe5 … Bh7 26. a4 Bg8 27. f4 h5 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. Nc3 Nh6 … 4. d4 g6 5. e4 Nf7 6. Bb5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. Nc3 Nh6 … 4. d4 g6 5. e4 Nf7 6. Bd3 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 Nh6 … 4. d4 g6 5. e4 Nf7 6. Bh3 (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 | 1026 | 2 | |
| g1h3 | unsolved | 820 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 441 | 2 | |
| e2e4 | unsolved | 418 | 2 | |
| b1c3 | unsolved | 105 | 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 | BManBJ 36.1% of the fleet | 1.19T | 7,602 |
| 2 | tenzink 21.6% of the fleet | 712.05B | 4,586 |
| 3 | randomchampgamer 20.3% of the fleet | 671.66B | 4,608 |
| 4 | RickEdinson 14.5% of the fleet | 477.87B | 3,068 |
| 5 | MoNiKaMaDnEsS 7.4% of the fleet | 244.44B | 1,634 |
| 6 | quasa 0.1% of the fleet | 3.35B | 27 |
| 7 | soothdest <0.1% of the fleet | 474.8M | 26 |
7 accounts · 3.30T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 33.2% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.2% of the fleet | 41.42T | 340,329 |
| 3 | BManBJ 14.0% of the fleet | 38.13T | 268,977 |
| 4 | auranvesdranor 11.6% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 5.2% of the fleet | 14.21T | 105,369 |
| 6 | JackIV 3.7% of the fleet | 10.06T | 67,859 |
| 7 | RickEdinson 3.4% of the fleet | 9.36T | 62,860 |
| 8 | gannet 2.7% of the fleet | 7.24T | 46,848 |
| 9 | MoNiKaMaDnEsS 2.0% of the fleet | 5.55T | 37,156 |
| 10 | NeoArcturus 1.5% of the fleet | 4.09T | 16,758 |
and 25 more.
35 accounts · 271.67T 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 21 proposals · see every proposal
Milestones
- Oct 05 19:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … Nh6 5. d4 Nf7 6. Nd5 f5
1. Nf3 f6 2. e4 c6 3. Nc3 g6 4. g4 Nh6 5. d4 Nf7 6. Nd5 f5 - Oct 05 19:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … Nh6 5. d4 Nf7 6. Nd5 c5
1. Nf3 f6 2. e4 c6 3. Nc3 g6 4. g4 Nh6 5. d4 Nf7 6. Nd5 c5 - Oct 05 19:45 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … g5 14. Nb5 Rc8 15. Bc4 Rb8
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 Nd7 11. Nc3 Kg7 12. e5 Nf8 13. Qd2 g5 14. Nb5 Rc8 15. Bc4 Rb8 - Oct 05 19:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … h3 28. g3 Kf7 29. Qg7 Ke8
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 Nd7 11. Nc3 Kg7 12. e5 Nf8 13. Qd2 g5 14. Nb5 Rc8 15. Bc4 Rb8 16. Nc7 Ne6 17. Ne8 Kh8 18. exd6 Rc8 19. Nc7 Rf8 20. Be6 Rf6 21. Bxf5 e5 22. Ne6 a5 23. d5 b5 24. O-O Kg8 25. Kh1 h4 26. Qd3 e4 27. Qd4 h3 28. g3 Kf7 29. Qg7 Ke8 - Oct 05 19:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 27. Qd4 h3 28. g3 Kf7 29. Qg7
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 Nd7 11. Nc3 Kg7 12. e5 Nf8 13. Qd2 g5 14. Nb5 Rc8 15. Bc4 Rb8 16. Nc7 Ne6 17. Ne8 Kh8 18. exd6 Rc8 19. Nc7 Rf8 20. Be6 Rf6 21. Bxf5 e5 22. Ne6 a5 23. d5 b5 24. O-O Kg8 25. Kh1 h4 26. Qd3 e4 27. Qd4 h3 28. g3 Kf7 29. Qg7 - Oct 05 19:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … e4 27. Qd4 h3 28. g3 Kf7
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 Nd7 11. Nc3 Kg7 12. e5 Nf8 13. Qd2 g5 14. Nb5 Rc8 15. Bc4 Rb8 16. Nc7 Ne6 17. Ne8 Kh8 18. exd6 Rc8 19. Nc7 Rf8 20. Be6 Rf6 21. Bxf5 e5 22. Ne6 a5 23. d5 b5 24. O-O Kg8 25. Kh1 h4 26. Qd3 e4 27. Qd4 h3 28. g3 Kf7 - Oct 05 19:44 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 26. Qd3 e4 27. Qd4 h3 28. g3
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 Nd7 11. Nc3 Kg7 12. e5 Nf8 13. Qd2 g5 14. Nb5 Rc8 15. Bc4 Rb8 16. Nc7 Ne6 17. Ne8 Kh8 18. exd6 Rc8 19. Nc7 Rf8 20. Be6 Rf6 21. Bxf5 e5 22. Ne6 a5 23. d5 b5 24. O-O Kg8 25. Kh1 h4 26. Qd3 e4 27. Qd4 h3 28. g3 - Oct 05 19:44 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … h4 26. Qd3 e4 27. Qd4 h3
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 Nd7 11. Nc3 Kg7 12. e5 Nf8 13. Qd2 g5 14. Nb5 Rc8 15. Bc4 Rb8 16. Nc7 Ne6 17. Ne8 Kh8 18. exd6 Rc8 19. Nc7 Rf8 20. Be6 Rf6 21. Bxf5 e5 22. Ne6 a5 23. d5 b5 24. O-O Kg8 25. Kh1 h4 26. Qd3 e4 27. Qd4 h3 - Oct 05 19:44 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 25. Kh1 h4 26. Qd3 e4 27. Qd4
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 Nd7 11. Nc3 Kg7 12. e5 Nf8 13. Qd2 g5 14. Nb5 Rc8 15. Bc4 Rb8 16. Nc7 Ne6 17. Ne8 Kh8 18. exd6 Rc8 19. Nc7 Rf8 20. Be6 Rf6 21. Bxf5 e5 22. Ne6 a5 23. d5 b5 24. O-O Kg8 25. Kh1 h4 26. Qd3 e4 27. Qd4 - Oct 05 19:44 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Kg8 25. Kh1 h4 26. Qd3 e4
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 Nd7 11. Nc3 Kg7 12. e5 Nf8 13. Qd2 g5 14. Nb5 Rc8 15. Bc4 Rb8 16. Nc7 Ne6 17. Ne8 Kh8 18. exd6 Rc8 19. Nc7 Rf8 20. Be6 Rf6 21. Bxf5 e5 22. Ne6 a5 23. d5 b5 24. O-O Kg8 25. Kh1 h4 26. Qd3 e4 - Oct 05 19:44 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 24. O-O Kg8 25. Kh1 h4 26. 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 Nd7 11. Nc3 Kg7 12. e5 Nf8 13. Qd2 g5 14. Nb5 Rc8 15. Bc4 Rb8 16. Nc7 Ne6 17. Ne8 Kh8 18. exd6 Rc8 19. Nc7 Rf8 20. Be6 Rf6 21. Bxf5 e5 22. Ne6 a5 23. d5 b5 24. O-O Kg8 25. Kh1 h4 26. Qd3 - Oct 05 19:44 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … b5 24. O-O Kg8 25. Kh1 h4
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 Nd7 11. Nc3 Kg7 12. e5 Nf8 13. Qd2 g5 14. Nb5 Rc8 15. Bc4 Rb8 16. Nc7 Ne6 17. Ne8 Kh8 18. exd6 Rc8 19. Nc7 Rf8 20. Be6 Rf6 21. Bxf5 e5 22. Ne6 a5 23. d5 b5 24. O-O Kg8 25. Kh1 h4