73.0M
positions
13.6M
practically solved
261.21T
engine nodes
2.0M
analyses
11,166
in queue
11
active workers
72
active cores
18.9M
nodes / sec
23.7
positions / min
82
proof number
3,797
disproof number
Root conquest: 0/20 first moves solved · 18.6% of tree positions solved · last 24h: 349,903 closures, 4.32T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 78 over 200 open obligations, of which 33 (16.5%) 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 3.5h (median of 111) · measured at 2026-10-02 19:00 UTC
Closures by source, last 24h (349801 of 349801 labelled): USER 99.7% (348696) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.3% (1105) · last 7d (2910954 of 2911056): USER 98.5% (2867890) · FILL 0.3% (8721) · AUTO 1.0% (29959) · SOLVE 0.0% (0) · NONE 0.2% (4384). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nh3 f5 2. e3 e6 … Be7 12. c4 b5 13. c5 Bg5 (User) · 128.0M nodes · auranvesdranor-admin-835912-atomicdb
- 1. Nh3 f5 2. e3 e6 … Be7 12. c4 b5 13. c5 Bxc5 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. d4 d5 2. Nc3 Nf6 … c6 5. Nh3 e5 6. Nb5 cxb5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nh3 h6 2. d4 e6 … 9. Be3 O-O 10. Bxb5 Nbc6 11. Rf1 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nh3 f6 2. d4 Nc6 … 9. Rc1 g5 10. e4 b5 11. Nf4 (User) · 512.0M 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 | 725 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 439 | 2 | |
| e2e4 | unsolved | 417 | 2 | |
| b1c3 | unsolved | 112 | 2 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b2b4 | unsolved | 0 | 3 | |
| b1a3 | unsolved | 0 | 3 | |
| h2h3 | unsolved | -97 | 2 | |
| d2d3 | unsolved | -98 | 2 | |
| a2a3 | unsolved | -100 | 2 | |
| f2f3 | unsolved | -117 | 3 | |
| b2b3 | unsolved | -144 | 1 | |
| f2f4 | unsolved | -305 | 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 34.7% of the fleet | 1.50T | 11,620 |
| 2 | auranvesdranor 23.0% of the fleet | 995.42B | 7,632 |
| 3 | tenzink 14.7% of the fleet | 635.77B | 4,724 |
| 4 | randomchampgamer 14.5% of the fleet | 628.06B | 4,947 |
| 5 | RickEdinson 10.3% of the fleet | 443.40B | 3,299 |
| 6 | MoNiKaMaDnEsS 2.4% of the fleet | 105.86B | 829 |
| 7 | quasa 0.2% of the fleet | 7.94B | 62 |
| 8 | soothdest 0.1% of the fleet | 5.48B | 51 |
8 accounts · 4.32T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 34.6% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.0% of the fleet | 39.31T | 325,599 |
| 3 | BManBJ 13.0% of the fleet | 33.88T | 238,496 |
| 4 | auranvesdranor 12.0% of the fleet | 31.31T | 227,290 |
| 5 | randomchampgamer 4.6% of the fleet | 12.14T | 90,361 |
| 6 | JackIV 3.8% of the fleet | 10.06T | 67,859 |
| 7 | RickEdinson 3.0% of the fleet | 7.91T | 53,019 |
| 8 | gannet 2.8% of the fleet | 7.24T | 46,848 |
| 9 | MoNiKaMaDnEsS 2.0% of the fleet | 5.17T | 34,516 |
| 10 | NeoArcturus 1.6% of the fleet | 4.09T | 16,758 |
and 25 more.
35 accounts · 261.31T 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
- Is Nh3 h6 e3 e6 Nc3 a draw?1. Nh3 e6 2. e3 h6 3. Nc3proposed by soothdest · 4 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
Showing the 6 most voted of 21 proposals · see every proposal
Milestones
- Oct 02 19:37 Solved: WHITE_WIN via MINIMAXview
1. Na3 e5 2. Nf3 Qg5 … Kd8 8. h3 g5 9. Qh5 f5
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 Rc8 6. e4 Nh6 7. Bb5 Kd8 8. h3 g5 9. Qh5 f5 - Oct 02 19:37 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … Kc7 22. Rc8 Kb6 23. Be3 Ka6
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 Rc8 6. e4 Nh6 7. Bb5 Kd8 8. h3 g5 9. Qh5 f5 10. d4 Kc7 11. Bd7 Rd8 12. Bd2 Ng4 13. exf5 b6 14. Bc6 Be7 15. O-O g4 16. Kh1 Rhf8 17. Qe8 Kb8 18. Qxe7 a5 19. dxe5 b5 20. Rae1 b4 21. Re8 Kc7 22. Rc8 Kb6 23. Be3 Ka6 - Oct 02 19:37 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … 21. Re8 Kc7 22. Rc8 Kb6 23. Be3
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 Rc8 6. e4 Nh6 7. Bb5 Kd8 8. h3 g5 9. Qh5 f5 10. d4 Kc7 11. Bd7 Rd8 12. Bd2 Ng4 13. exf5 b6 14. Bc6 Be7 15. O-O g4 16. Kh1 Rhf8 17. Qe8 Kb8 18. Qxe7 a5 19. dxe5 b5 20. Rae1 b4 21. Re8 Kc7 22. Rc8 Kb6 23. Be3 - Oct 02 19:37 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … b4 21. Re8 Kc7 22. Rc8 Kb6
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 Rc8 6. e4 Nh6 7. Bb5 Kd8 8. h3 g5 9. Qh5 f5 10. d4 Kc7 11. Bd7 Rd8 12. Bd2 Ng4 13. exf5 b6 14. Bc6 Be7 15. O-O g4 16. Kh1 Rhf8 17. Qe8 Kb8 18. Qxe7 a5 19. dxe5 b5 20. Rae1 b4 21. Re8 Kc7 22. Rc8 Kb6 - Oct 02 19:37 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … 20. Rae1 b4 21. Re8 Kc7 22. Rc8
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 Rc8 6. e4 Nh6 7. Bb5 Kd8 8. h3 g5 9. Qh5 f5 10. d4 Kc7 11. Bd7 Rd8 12. Bd2 Ng4 13. exf5 b6 14. Bc6 Be7 15. O-O g4 16. Kh1 Rhf8 17. Qe8 Kb8 18. Qxe7 a5 19. dxe5 b5 20. Rae1 b4 21. Re8 Kc7 22. Rc8 - Oct 02 19:37 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … b5 20. Rae1 b4 21. Re8 Kc7
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 Rc8 6. e4 Nh6 7. Bb5 Kd8 8. h3 g5 9. Qh5 f5 10. d4 Kc7 11. Bd7 Rd8 12. Bd2 Ng4 13. exf5 b6 14. Bc6 Be7 15. O-O g4 16. Kh1 Rhf8 17. Qe8 Kb8 18. Qxe7 a5 19. dxe5 b5 20. Rae1 b4 21. Re8 Kc7 - Oct 02 19:37 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … 19. dxe5 b5 20. Rae1 b4 21. Re8
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 Rc8 6. e4 Nh6 7. Bb5 Kd8 8. h3 g5 9. Qh5 f5 10. d4 Kc7 11. Bd7 Rd8 12. Bd2 Ng4 13. exf5 b6 14. Bc6 Be7 15. O-O g4 16. Kh1 Rhf8 17. Qe8 Kb8 18. Qxe7 a5 19. dxe5 b5 20. Rae1 b4 21. Re8 - Oct 02 19:37 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … a5 19. dxe5 b5 20. Rae1 b4
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 Rc8 6. e4 Nh6 7. Bb5 Kd8 8. h3 g5 9. Qh5 f5 10. d4 Kc7 11. Bd7 Rd8 12. Bd2 Ng4 13. exf5 b6 14. Bc6 Be7 15. O-O g4 16. Kh1 Rhf8 17. Qe8 Kb8 18. Qxe7 a5 19. dxe5 b5 20. Rae1 b4 - Oct 02 19:37 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … 18. Qxe7 a5 19. dxe5 b5 20. Rae1
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 Rc8 6. e4 Nh6 7. Bb5 Kd8 8. h3 g5 9. Qh5 f5 10. d4 Kc7 11. Bd7 Rd8 12. Bd2 Ng4 13. exf5 b6 14. Bc6 Be7 15. O-O g4 16. Kh1 Rhf8 17. Qe8 Kb8 18. Qxe7 a5 19. dxe5 b5 20. Rae1 - Oct 02 19:37 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … Kb8 18. Qxe7 a5 19. dxe5 b5
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 Rc8 6. e4 Nh6 7. Bb5 Kd8 8. h3 g5 9. Qh5 f5 10. d4 Kc7 11. Bd7 Rd8 12. Bd2 Ng4 13. exf5 b6 14. Bc6 Be7 15. O-O g4 16. Kh1 Rhf8 17. Qe8 Kb8 18. Qxe7 a5 19. dxe5 b5 - Oct 02 19:37 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … 17. Qe8 Kb8 18. Qxe7 a5 19. dxe5
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 Rc8 6. e4 Nh6 7. Bb5 Kd8 8. h3 g5 9. Qh5 f5 10. d4 Kc7 11. Bd7 Rd8 12. Bd2 Ng4 13. exf5 b6 14. Bc6 Be7 15. O-O g4 16. Kh1 Rhf8 17. Qe8 Kb8 18. Qxe7 a5 19. dxe5 - Oct 02 19:37 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … Rhf8 17. Qe8 Kb8 18. Qxe7 a5
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 Rc8 6. e4 Nh6 7. Bb5 Kd8 8. h3 g5 9. Qh5 f5 10. d4 Kc7 11. Bd7 Rd8 12. Bd2 Ng4 13. exf5 b6 14. Bc6 Be7 15. O-O g4 16. Kh1 Rhf8 17. Qe8 Kb8 18. Qxe7 a5