69.5M
positions
12.6M
practically solved
249.99T
engine nodes
1.9M
analyses
7,646
in queue
18
active workers
128
active cores
34.6M
nodes / sec
41.3
positions / min
82
proof number
3,797
disproof number
Root conquest: 0/20 first moves solved · 18.1% of tree positions solved · last 24h: 441,325 closures, 7.02T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 80 over 197 open obligations, of which 32 (16.2%) 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 109) · measured at 2026-09-30 18:00 UTC
Closures by source, last 24h (441325 of 441325 labelled): USER 99.9% (441081) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.1% (244) · last 7d (2269027 of 2269027): USER 98.1% (2225388) · FILL 0.4% (8795) · AUTO 1.4% (32065) · SOLVE 0.0% (0) · NONE 0.1% (2779). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nh3 e6 2. e3 g6 … 12. exf4 Nf6 13. Ne6 Kg8 14. Rb1 (User) · 128.0M nodes · auranvesdranor-admin-835912-atomicdb
- 1. Nh3 e6 2. e3 g6 … 12. exf4 Nf6 13. Ne6 Kg8 14. Rf1 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Kg8 14. h3 g5 15. Nd5 Kg7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Kg8 14. h3 g5 15. Nd5 Re8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … Kg8 14. h3 g5 15. Nd5 Rf8 (User) · 128.0M nodes · BManBJ-Laptop-Blake-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 | 1051 | 2 | |
| g1h3 | unsolved | 747 | 2 | |
| e2e3 | unsolved | 453 | 3 | |
| d2d4 | unsolved | 437 | 2 | |
| e2e4 | unsolved | 407 | 2 | |
| b1c3 | unsolved | 142 | 2 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b2b4 | unsolved | 0 | 3 | |
| b1a3 | unsolved | 0 | 3 | |
| h2h3 | unsolved | -98 | 2 | |
| a2a3 | unsolved | -103 | 2 | |
| d2d3 | unsolved | -116 | 2 | |
| f2f3 | unsolved | -117 | 3 | |
| b2b3 | unsolved | -169 | 1 | |
| f2f4 | unsolved | -302 | 3 | |
| h2h4 | unsolved | -500 | 2 | |
| a2a4 | unsolved | -510 | 2 | |
| g2g4 | unsolved | -600 | 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 | gannet 42.1% of the fleet | 2.95T | 22,729 |
| 2 | BManBJ 21.3% of the fleet | 1.49T | 11,548 |
| 3 | auranvesdranor 14.9% of the fleet | 1.04T | 7,928 |
| 4 | randomchampgamer 8.7% of the fleet | 613.01B | 4,944 |
| 5 | tenzink 8.0% of the fleet | 562.79B | 3,964 |
| 6 | RickEdinson 2.6% of the fleet | 180.59B | 1,206 |
| 7 | MoNiKaMaDnEsS 2.4% of the fleet | 171.16B | 1,351 |
| 8 | soothdest <0.1% of the fleet | 192.9M | 28 |
8 accounts · 7.02T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 36.1% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.2% of the fleet | 37.98T | 315,820 |
| 3 | BManBJ 12.3% of the fleet | 30.85T | 214,911 |
| 4 | auranvesdranor 11.7% of the fleet | 29.23T | 211,433 |
| 5 | randomchampgamer 4.3% of the fleet | 10.86T | 80,277 |
| 6 | JackIV 4.0% of the fleet | 10.06T | 67,859 |
| 7 | RickEdinson 2.8% of the fleet | 6.99T | 46,405 |
| 8 | gannet 2.2% of the fleet | 5.44T | 32,996 |
| 9 | MoNiKaMaDnEsS 1.8% of the fleet | 4.59T | 29,990 |
| 10 | NeoArcturus 1.6% of the fleet | 4.09T | 16,758 |
and 25 more.
35 accounts · 250.16T 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 · 16 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
- Refuting 1... d61. Nf3 d6 2. Nc3proposed by randomchampgamer · 3 votes
- The weaker of the two f-pawn advances for 1. ...d61. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4proposed by MoNiKaMaDnEsS · 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
- Is Nh3 h6 e3 e6 Nc3 a draw?1. Nh3 e6 2. e3 h6 3. Nc3proposed by soothdest · 3 votes
Showing the 6 most voted of 21 proposals · see every proposal
Milestones
- Sep 30 18:39 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … Kg8 14. h3 g5 15. Nd5 Kh7
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 Rc8 10. Nc3 a6 11. Bxh6 Kf8 12. Bb5 f4 13. Bd7 Kg8 14. h3 g5 15. Nd5 Kh7 - Sep 30 18:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … dxe4 22. Qc7 Kg6 23. Qh7 Kf6
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 Rc8 10. Nc3 a6 11. Bxh6 Kf8 12. Bb5 f4 13. Bd7 Kg8 14. h3 g5 15. Nd5 Kh7 16. Bxc8 e5 17. Nxf6 g4 18. c3 d5 19. Qa4 b5 20. Qa5 g3 21. f3 dxe4 22. Qc7 Kg6 23. Qh7 Kf6 - Sep 30 18:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 21. f3 dxe4 22. Qc7 Kg6 23. Qh7
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 Rc8 10. Nc3 a6 11. Bxh6 Kf8 12. Bb5 f4 13. Bd7 Kg8 14. h3 g5 15. Nd5 Kh7 16. Bxc8 e5 17. Nxf6 g4 18. c3 d5 19. Qa4 b5 20. Qa5 g3 21. f3 dxe4 22. Qc7 Kg6 23. Qh7 - Sep 30 18:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … g3 21. f3 dxe4 22. Qc7 Kg6
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 Rc8 10. Nc3 a6 11. Bxh6 Kf8 12. Bb5 f4 13. Bd7 Kg8 14. h3 g5 15. Nd5 Kh7 16. Bxc8 e5 17. Nxf6 g4 18. c3 d5 19. Qa4 b5 20. Qa5 g3 21. f3 dxe4 22. Qc7 Kg6 - Sep 30 18:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 20. Qa5 g3 21. f3 dxe4 22. Qc7
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 Rc8 10. Nc3 a6 11. Bxh6 Kf8 12. Bb5 f4 13. Bd7 Kg8 14. h3 g5 15. Nd5 Kh7 16. Bxc8 e5 17. Nxf6 g4 18. c3 d5 19. Qa4 b5 20. Qa5 g3 21. f3 dxe4 22. Qc7 - Sep 30 18:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … b5 20. Qa5 g3 21. f3 dxe4
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 Rc8 10. Nc3 a6 11. Bxh6 Kf8 12. Bb5 f4 13. Bd7 Kg8 14. h3 g5 15. Nd5 Kh7 16. Bxc8 e5 17. Nxf6 g4 18. c3 d5 19. Qa4 b5 20. Qa5 g3 21. f3 dxe4 - Sep 30 18:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 19. Qa4 b5 20. Qa5 g3 21. f3
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 Rc8 10. Nc3 a6 11. Bxh6 Kf8 12. Bb5 f4 13. Bd7 Kg8 14. h3 g5 15. Nd5 Kh7 16. Bxc8 e5 17. Nxf6 g4 18. c3 d5 19. Qa4 b5 20. Qa5 g3 21. f3 - Sep 30 18:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … d5 19. Qa4 b5 20. Qa5 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 Rc8 10. Nc3 a6 11. Bxh6 Kf8 12. Bb5 f4 13. Bd7 Kg8 14. h3 g5 15. Nd5 Kh7 16. Bxc8 e5 17. Nxf6 g4 18. c3 d5 19. Qa4 b5 20. Qa5 g3 - Sep 30 18:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 18. c3 d5 19. Qa4 b5 20. Qa5
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 Rc8 10. Nc3 a6 11. Bxh6 Kf8 12. Bb5 f4 13. Bd7 Kg8 14. h3 g5 15. Nd5 Kh7 16. Bxc8 e5 17. Nxf6 g4 18. c3 d5 19. Qa4 b5 20. Qa5 - Sep 30 18:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … g4 18. c3 d5 19. Qa4 b5
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 Rc8 10. Nc3 a6 11. Bxh6 Kf8 12. Bb5 f4 13. Bd7 Kg8 14. h3 g5 15. Nd5 Kh7 16. Bxc8 e5 17. Nxf6 g4 18. c3 d5 19. Qa4 b5 - Sep 30 18:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 17. Nxf6 g4 18. c3 d5 19. Qa4
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 Rc8 10. Nc3 a6 11. Bxh6 Kf8 12. Bb5 f4 13. Bd7 Kg8 14. h3 g5 15. Nd5 Kh7 16. Bxc8 e5 17. Nxf6 g4 18. c3 d5 19. Qa4 - Sep 30 18:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … e5 17. Nxf6 g4 18. c3 d5
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 Rc8 10. Nc3 a6 11. Bxh6 Kf8 12. Bb5 f4 13. Bd7 Kg8 14. h3 g5 15. Nd5 Kh7 16. Bxc8 e5 17. Nxf6 g4 18. c3 d5