69.4M
positions
12.6M
practically solved
249.67T
engine nodes
1.9M
analyses
6,953
in queue
21
active workers
134
active cores
22.5M
nodes / sec
42.8
positions / min
82
proof number
3,797
disproof number
Root conquest: 0/20 first moves solved · 18.1% of tree positions solved · last 24h: 433,882 closures, 6.97T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 80 over 198 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 3.8m (median of 103) · measured at 2026-09-30 17:00 UTC
Closures by source, last 24h (433823 of 433823 labelled): USER 99.9% (433587) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.1% (236) · last 7d (2255956 of 2256015): USER 98.1% (2212326) · FILL 0.4% (8795) · AUTO 1.4% (32065) · SOLVE 0.0% (0) · NONE 0.1% (2770). 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 … 18. cxd6 b4 19. Bb2 a5 20. e4 (User) · 128.0M nodes · auranvesdranor-admin-835912-atomicdb
- 1. Nh3 e6 2. e3 g6 … 11. d3 Nf6 12. Ba3 d6 13. Bxb4 (User) · 512.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … g5 13. Bd7 a6 14. Nc3 Kh7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … g5 13. Bd7 a6 14. Nc3 Kf7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … g5 13. Bd7 a6 14. Nc3 Kg7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
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 | 1101 | 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 41.9% of the fleet | 2.92T | 22,518 |
| 2 | BManBJ 21.3% of the fleet | 1.49T | 11,504 |
| 3 | auranvesdranor 14.9% of the fleet | 1.04T | 7,915 |
| 4 | randomchampgamer 8.7% of the fleet | 609.94B | 4,915 |
| 5 | tenzink 8.1% of the fleet | 565.73B | 3,984 |
| 6 | RickEdinson 2.7% of the fleet | 186.35B | 1,230 |
| 7 | MoNiKaMaDnEsS 2.3% of the fleet | 157.69B | 1,237 |
| 8 | soothdest <0.1% of the fleet | 192.9M | 28 |
8 accounts · 6.97T 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 | 37.97T | 315,737 |
| 3 | BManBJ 12.3% of the fleet | 30.80T | 214,565 |
| 4 | auranvesdranor 11.7% of the fleet | 29.20T | 211,201 |
| 5 | randomchampgamer 4.3% of the fleet | 10.84T | 80,123 |
| 6 | JackIV 4.0% of the fleet | 10.06T | 67,859 |
| 7 | RickEdinson 2.8% of the fleet | 6.99T | 46,366 |
| 8 | gannet 2.1% of the fleet | 5.33T | 32,149 |
| 9 | MoNiKaMaDnEsS 1.8% of the fleet | 4.57T | 29,875 |
| 10 | NeoArcturus 1.6% of the fleet | 4.09T | 16,758 |
and 25 more.
35 accounts · 249.93T 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 17:55 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nc3 g6 … b5 18. Qe7 Kc7 19. Qd8 Kd6
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kd8 9. d4 Rc8 10. Qe2 Rc7 11. Bd7 Rc4 12. Bd2 Rc7 13. Ba5 b6 14. Bb4 Bc5 15. Qa6 Rb7 16. Bxc5 g5 17. Qa3 b5 18. Qe7 Kc7 19. Qd8 Kd6 - Sep 30 17:55 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … g5 13. Bd7 a6 14. Nc3 Kf8
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 f4 11. h3 Kg8 12. Bb5 g5 13. Bd7 a6 14. Nc3 Kf8 - Sep 30 17:55 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … g3 20. f3 Ke8 21. Qe6 Kd8
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 f4 11. h3 Kg8 12. Bb5 g5 13. Bd7 a6 14. Nc3 Kf8 15. e5 Rc8 16. Bxc8 e6 17. exf6 e5 18. dxe5 g4 19. Qd5 g3 20. f3 Ke8 21. Qe6 Kd8 - Sep 30 17:55 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 19. Qd5 g3 20. f3 Ke8 21. Qe6
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 f4 11. h3 Kg8 12. Bb5 g5 13. Bd7 a6 14. Nc3 Kf8 15. e5 Rc8 16. Bxc8 e6 17. exf6 e5 18. dxe5 g4 19. Qd5 g3 20. f3 Ke8 21. Qe6 - Sep 30 17:55 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … g4 19. Qd5 g3 20. f3 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 f4 11. h3 Kg8 12. Bb5 g5 13. Bd7 a6 14. Nc3 Kf8 15. e5 Rc8 16. Bxc8 e6 17. exf6 e5 18. dxe5 g4 19. Qd5 g3 20. f3 Ke8 - Sep 30 17:55 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 18. dxe5 g4 19. Qd5 g3 20. 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 Kf8 10. Bxh6 f4 11. h3 Kg8 12. Bb5 g5 13. Bd7 a6 14. Nc3 Kf8 15. e5 Rc8 16. Bxc8 e6 17. exf6 e5 18. dxe5 g4 19. Qd5 g3 20. f3 - Sep 30 17:55 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … e5 18. dxe5 g4 19. Qd5 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 f4 11. h3 Kg8 12. Bb5 g5 13. Bd7 a6 14. Nc3 Kf8 15. e5 Rc8 16. Bxc8 e6 17. exf6 e5 18. dxe5 g4 19. Qd5 g3 - Sep 30 17:55 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 17. exf6 e5 18. dxe5 g4 19. Qd5
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 f4 11. h3 Kg8 12. Bb5 g5 13. Bd7 a6 14. Nc3 Kf8 15. e5 Rc8 16. Bxc8 e6 17. exf6 e5 18. dxe5 g4 19. Qd5 - Sep 30 17:55 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … e6 17. exf6 e5 18. dxe5 g4
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 f4 11. h3 Kg8 12. Bb5 g5 13. Bd7 a6 14. Nc3 Kf8 15. e5 Rc8 16. Bxc8 e6 17. exf6 e5 18. dxe5 g4 - Sep 30 17:55 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 16. Bxc8 e6 17. exf6 e5 18. dxe5
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 f4 11. h3 Kg8 12. Bb5 g5 13. Bd7 a6 14. Nc3 Kf8 15. e5 Rc8 16. Bxc8 e6 17. exf6 e5 18. dxe5 - Sep 30 17:55 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Rc8 16. Bxc8 e6 17. exf6 e5
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 f4 11. h3 Kg8 12. Bb5 g5 13. Bd7 a6 14. Nc3 Kf8 15. e5 Rc8 16. Bxc8 e6 17. exf6 e5 - Sep 30 17:55 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 15. e5 Rc8 16. Bxc8 e6 17. exf6
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 f4 11. h3 Kg8 12. Bb5 g5 13. Bd7 a6 14. Nc3 Kf8 15. e5 Rc8 16. Bxc8 e6 17. exf6