79.2M
positions
15.2M
practically solved
285.94T
engine nodes
2.2M
analyses
6,911
in queue
6
active workers
34
active cores
10.1M
nodes / sec
12.8
positions / min
82
proof number
4,106
disproof number
Root conquest: 0/20 first moves solved · 19.2% of tree positions solved · last 24h: 273,004 closures, 5.45T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 69 over 217 open obligations, of which 41 (18.9%) 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 7.1m (median of 79) · measured at 2026-10-08 23:00 UTC
Closures by source, last 24h (272942 of 272942 labelled): USER 95.0% (259386) · FILL 0.6% (1549) · AUTO 4.4% (11927) · SOLVE 0.0% (0) · NONE 0.0% (80) · last 7d (1756428 of 1756490): USER 99.0% (1738607) · FILL 0.1% (2071) · AUTO 0.7% (11952) · SOLVE 0.0% (0) · NONE 0.2% (3798). 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. e4 e6 … 28. Rc1 Ba4 29. b3 Bd7 30. c5 (User) · 512.0M nodes · BManBJ-Blake-atomicdb
- 1. Nh3 h6 2. d4 a6 … 5. f3 Bxf3 6. e4 c6 7. Kf2 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. e4 e6 … Ba4 29. b3 Bd7 30. c5 Bc6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 d6 2. Ng5 f6 … 12. c4 Rb7 13. c5 a4 14. c6 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nh3 h6 2. d4 a6 … 6. e4 c6 7. Bb5 Qc8 8. a3 (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 | 1044 | 2 | |
| g1h3 | unsolved | 820 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| e2e4 | unsolved | 400 | 2 | |
| d2d4 | unsolved | 364 | 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 48.7% of the fleet | 2.65T | 20,725 |
| 2 | BManBJ 27.6% of the fleet | 1.50T | 10,456 |
| 3 | randomchampgamer 12.1% of the fleet | 660.52B | 4,579 |
| 4 | RickEdinson 8.0% of the fleet | 435.09B | 2,901 |
| 5 | MoNiKaMaDnEsS 3.5% of the fleet | 193.30B | 1,673 |
| 6 | soothdest 0.1% of the fleet | 2.73B | 31 |
| 7 | NeoArcturus <0.1% of the fleet | 546.0M | 5 |
7 accounts · 5.45T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 31.6% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 15.0% of the fleet | 42.99T | 301,231 |
| 3 | tenzink 15.0% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 11.0% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 5.7% of the fleet | 16.25T | 119,054 |
| 6 | RickEdinson 3.8% of the fleet | 10.80T | 72,101 |
| 7 | JackIV 3.5% of the fleet | 10.06T | 67,859 |
| 8 | Torom 2.6% of the fleet | 7.37T | 55,749 |
| 9 | gannet 2.5% of the fleet | 7.24T | 46,848 |
| 10 | MoNiKaMaDnEsS 2.2% of the fleet | 6.20T | 42,008 |
and 25 more.
35 accounts · 286.04T 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 08 23:57 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 a6 … 14. c6 Re7 15. c7 Kh8 16. c8=Q
1. Nf3 f6 2. Nc3 a6 3. Ne5 d6 4. Nf7 Qd7 5. Nd5 e6 6. Nxc7 a5 7. e3 b5 8. Nxh8 d5 9. Bxb5 Rb8 10. d4 g6 11. Bd2 Kf7 12. c4 Rb7 13. c5 Kg7 14. c6 Re7 15. c7 Kh8 16. c8=Q - Oct 08 23:57 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 a6 … Kg7 14. c6 Re7 15. c7 Kh8
1. Nf3 f6 2. Nc3 a6 3. Ne5 d6 4. Nf7 Qd7 5. Nd5 e6 6. Nxc7 a5 7. e3 b5 8. Nxh8 d5 9. Bxb5 Rb8 10. d4 g6 11. Bd2 Kf7 12. c4 Rb7 13. c5 Kg7 14. c6 Re7 15. c7 Kh8 - Oct 08 23:57 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 a6 … 13. c5 Kg7 14. c6 Re7 15. c7
1. Nf3 f6 2. Nc3 a6 3. Ne5 d6 4. Nf7 Qd7 5. Nd5 e6 6. Nxc7 a5 7. e3 b5 8. Nxh8 d5 9. Bxb5 Rb8 10. d4 g6 11. Bd2 Kf7 12. c4 Rb7 13. c5 Kg7 14. c6 Re7 15. c7 - Oct 08 23:57 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 a6 … Rb7 13. c5 Kg7 14. c6 Re7
1. Nf3 f6 2. Nc3 a6 3. Ne5 d6 4. Nf7 Qd7 5. Nd5 e6 6. Nxc7 a5 7. e3 b5 8. Nxh8 d5 9. Bxb5 Rb8 10. d4 g6 11. Bd2 Kf7 12. c4 Rb7 13. c5 Kg7 14. c6 Re7 - Oct 08 23:57 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 a6 … h5 21. Qe8 Bf8 22. Qf7 Bb4
1. Nf3 f6 2. Nc3 a6 3. Ne5 d6 4. Nf7 Qd7 5. Nd5 e6 6. Nxc7 a5 7. e3 b5 8. Nxh8 d5 9. Bxb5 Rb8 10. d4 g6 11. Bd2 Kf7 12. c4 Rb7 13. c5 Kg7 14. c6 Rf7 15. c7 Kh8 16. c8=Q Rc7 17. Qd7 Rxd7 18. Qa4 Bb4 19. O-O Bd6 20. g3 h5 21. Qe8 Bf8 22. Qf7 Bb4 - Oct 08 23:57 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 a6 … 20. g3 h5 21. Qe8 Bf8 22. Qf7
1. Nf3 f6 2. Nc3 a6 3. Ne5 d6 4. Nf7 Qd7 5. Nd5 e6 6. Nxc7 a5 7. e3 b5 8. Nxh8 d5 9. Bxb5 Rb8 10. d4 g6 11. Bd2 Kf7 12. c4 Rb7 13. c5 Kg7 14. c6 Rf7 15. c7 Kh8 16. c8=Q Rc7 17. Qd7 Rxd7 18. Qa4 Bb4 19. O-O Bd6 20. g3 h5 21. Qe8 Bf8 22. Qf7 - Oct 08 23:57 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 a6 … Bd6 20. g3 h5 21. Qe8 Bf8
1. Nf3 f6 2. Nc3 a6 3. Ne5 d6 4. Nf7 Qd7 5. Nd5 e6 6. Nxc7 a5 7. e3 b5 8. Nxh8 d5 9. Bxb5 Rb8 10. d4 g6 11. Bd2 Kf7 12. c4 Rb7 13. c5 Kg7 14. c6 Rf7 15. c7 Kh8 16. c8=Q Rc7 17. Qd7 Rxd7 18. Qa4 Bb4 19. O-O Bd6 20. g3 h5 21. Qe8 Bf8 - Oct 08 23:57 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 a6 … 19. O-O Bd6 20. g3 h5 21. Qe8
1. Nf3 f6 2. Nc3 a6 3. Ne5 d6 4. Nf7 Qd7 5. Nd5 e6 6. Nxc7 a5 7. e3 b5 8. Nxh8 d5 9. Bxb5 Rb8 10. d4 g6 11. Bd2 Kf7 12. c4 Rb7 13. c5 Kg7 14. c6 Rf7 15. c7 Kh8 16. c8=Q Rc7 17. Qd7 Rxd7 18. Qa4 Bb4 19. O-O Bd6 20. g3 h5 21. Qe8 - Oct 08 23:57 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 a6 … Bb4 19. O-O Bd6 20. g3 h5
1. Nf3 f6 2. Nc3 a6 3. Ne5 d6 4. Nf7 Qd7 5. Nd5 e6 6. Nxc7 a5 7. e3 b5 8. Nxh8 d5 9. Bxb5 Rb8 10. d4 g6 11. Bd2 Kf7 12. c4 Rb7 13. c5 Kg7 14. c6 Rf7 15. c7 Kh8 16. c8=Q Rc7 17. Qd7 Rxd7 18. Qa4 Bb4 19. O-O Bd6 20. g3 h5 - Oct 08 23:57 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 a6 … 18. Qa4 Bb4 19. O-O Bd6 20. g3
1. Nf3 f6 2. Nc3 a6 3. Ne5 d6 4. Nf7 Qd7 5. Nd5 e6 6. Nxc7 a5 7. e3 b5 8. Nxh8 d5 9. Bxb5 Rb8 10. d4 g6 11. Bd2 Kf7 12. c4 Rb7 13. c5 Kg7 14. c6 Rf7 15. c7 Kh8 16. c8=Q Rc7 17. Qd7 Rxd7 18. Qa4 Bb4 19. O-O Bd6 20. g3 - Oct 08 23:57 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 a6 … Rxd7 18. Qa4 Bb4 19. O-O Bd6
1. Nf3 f6 2. Nc3 a6 3. Ne5 d6 4. Nf7 Qd7 5. Nd5 e6 6. Nxc7 a5 7. e3 b5 8. Nxh8 d5 9. Bxb5 Rb8 10. d4 g6 11. Bd2 Kf7 12. c4 Rb7 13. c5 Kg7 14. c6 Rf7 15. c7 Kh8 16. c8=Q Rc7 17. Qd7 Rxd7 18. Qa4 Bb4 19. O-O Bd6 - Oct 08 23:57 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 a6 … 17. Qd7 Rxd7 18. Qa4 Bb4 19. O-O
1. Nf3 f6 2. Nc3 a6 3. Ne5 d6 4. Nf7 Qd7 5. Nd5 e6 6. Nxc7 a5 7. e3 b5 8. Nxh8 d5 9. Bxb5 Rb8 10. d4 g6 11. Bd2 Kf7 12. c4 Rb7 13. c5 Kg7 14. c6 Rf7 15. c7 Kh8 16. c8=Q Rc7 17. Qd7 Rxd7 18. Qa4 Bb4 19. O-O