83.6M
positions
15.9M
practically solved
307.05T
engine nodes
2.3M
analyses
669
in queue
6
active workers
40
active cores
6.7M
nodes / sec
12.6
positions / min
85
proof number
4,551
disproof number
Root conquest: 0/20 first moves solved · 19.1% of tree positions solved · last 24h: 121,121 closures, 4.06T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 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 3.6m (median of 4) · measured at 2026-10-14 04:00 UTC
Closures by source, last 24h (121121 of 121121 labelled): USER 99.4% (120438) · FILL 0.5% (553) · AUTO 0.0% (16) · SOLVE 0.0% (0) · NONE 0.1% (114) · last 7d (1266463 of 1266463): USER 97.4% (1233446) · FILL 0.2% (3075) · AUTO 2.3% (29472) · SOLVE 0.0% (0) · NONE 0.0% (470). 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 d5 3. Nc3 Bg4 4. d4 Qd6 (User) · 10.00B nodes · BManBJ-Blake-atomicdb
- 1. b4 d5 2. d4 Nh6 … 12. Rd1 Bh6 13. Qg5 Nf6 14. Qc5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … h5 13. Qe2 O-O 14. h3 Bc5 (User) · 128.0M nodes · MoNiKaMaDnEsS-DESKTOP-VG9VPVH-atomicdb
- 1. Nh3 h6 2. d4 d5 … 6. e4 e6 7. exd5 Bd6 8. Bd2 (User) · 128.0M nodes · randomchampgamer-2026PC-atomicdb
- 1. Nf3 f6 2. Nc3 Nh6 … Ng8 6. Nb5 cxb5 7. e4 a5 (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 | 1112 | 2 | |
| g1h3 | unsolved | 703 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| e2e4 | unsolved | 400 | 2 | |
| d2d4 | unsolved | 395 | 2 | |
| b1c3 | unsolved | 127 | 2 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b1a3 | unsolved | 0 | 3 | |
| b2b4 | unsolved | -87 | 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 34.6% of the fleet | 1.40T | 7,623 |
| 2 | Torom 31.8% of the fleet | 1.29T | 8,506 |
| 3 | randomchampgamer 14.9% of the fleet | 603.22B | 2,613 |
| 4 | RickEdinson 10.1% of the fleet | 409.87B | 2,314 |
| 5 | MoNiKaMaDnEsS 8.7% of the fleet | 351.76B | 2,150 |
5 accounts · 4.06T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 29.4% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 16.3% of the fleet | 49.92T | 344,486 |
| 3 | tenzink 13.9% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.2% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 6.1% of the fleet | 18.77T | 133,390 |
| 6 | Torom 5.1% of the fleet | 15.70T | 113,354 |
| 7 | RickEdinson 4.2% of the fleet | 12.98T | 85,409 |
| 8 | JackIV 3.3% of the fleet | 10.06T | 67,859 |
| 9 | MoNiKaMaDnEsS 2.4% of the fleet | 7.35T | 49,552 |
| 10 | gannet 2.4% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 307.14T 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 · 18 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 23 proposals · see every proposal
Milestones
- Oct 14 04:50 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … h5 13. Qe2 O-O 14. h3 Bxc3
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 e5 7. d4 e4 8. Nd8 Be7 9. Bg5 Nf6 10. Nxb7 d5 11. f4 Bb4 12. Nc3 h5 13. Qe2 O-O 14. h3 Bxc3 - Oct 14 04:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Rd7 22. Qf8 g5 23. Qh8 Kg6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 e5 7. d4 e4 8. Nd8 Be7 9. Bg5 Nf6 10. Nxb7 d5 11. f4 Bb4 12. Nc3 h5 13. Qe2 O-O 14. h3 Bxc3 15. Ba4 Kh8 16. Qa6 g6 17. Bxc6 Nd7 18. Qe6 Rf7 19. Bh6 Nf6 20. Bg7 Kh7 21. Qd6 Rd7 22. Qf8 g5 23. Qh8 Kg6 - Oct 14 04:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 21. Qd6 Rd7 22. Qf8 g5 23. Qh8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 e5 7. d4 e4 8. Nd8 Be7 9. Bg5 Nf6 10. Nxb7 d5 11. f4 Bb4 12. Nc3 h5 13. Qe2 O-O 14. h3 Bxc3 15. Ba4 Kh8 16. Qa6 g6 17. Bxc6 Nd7 18. Qe6 Rf7 19. Bh6 Nf6 20. Bg7 Kh7 21. Qd6 Rd7 22. Qf8 g5 23. Qh8 - Oct 14 04:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Kh7 21. Qd6 Rd7 22. Qf8 g5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 e5 7. d4 e4 8. Nd8 Be7 9. Bg5 Nf6 10. Nxb7 d5 11. f4 Bb4 12. Nc3 h5 13. Qe2 O-O 14. h3 Bxc3 15. Ba4 Kh8 16. Qa6 g6 17. Bxc6 Nd7 18. Qe6 Rf7 19. Bh6 Nf6 20. Bg7 Kh7 21. Qd6 Rd7 22. Qf8 g5 - Oct 14 04:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 20. Bg7 Kh7 21. Qd6 Rd7 22. Qf8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 e5 7. d4 e4 8. Nd8 Be7 9. Bg5 Nf6 10. Nxb7 d5 11. f4 Bb4 12. Nc3 h5 13. Qe2 O-O 14. h3 Bxc3 15. Ba4 Kh8 16. Qa6 g6 17. Bxc6 Nd7 18. Qe6 Rf7 19. Bh6 Nf6 20. Bg7 Kh7 21. Qd6 Rd7 22. Qf8 - Oct 14 04:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Nf6 20. Bg7 Kh7 21. Qd6 Rd7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 e5 7. d4 e4 8. Nd8 Be7 9. Bg5 Nf6 10. Nxb7 d5 11. f4 Bb4 12. Nc3 h5 13. Qe2 O-O 14. h3 Bxc3 15. Ba4 Kh8 16. Qa6 g6 17. Bxc6 Nd7 18. Qe6 Rf7 19. Bh6 Nf6 20. Bg7 Kh7 21. Qd6 Rd7 - Oct 14 04:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 19. Bh6 Nf6 20. Bg7 Kh7 21. Qd6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 e5 7. d4 e4 8. Nd8 Be7 9. Bg5 Nf6 10. Nxb7 d5 11. f4 Bb4 12. Nc3 h5 13. Qe2 O-O 14. h3 Bxc3 15. Ba4 Kh8 16. Qa6 g6 17. Bxc6 Nd7 18. Qe6 Rf7 19. Bh6 Nf6 20. Bg7 Kh7 21. Qd6 - Oct 14 04:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Rf7 19. Bh6 Nf6 20. Bg7 Kh7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 e5 7. d4 e4 8. Nd8 Be7 9. Bg5 Nf6 10. Nxb7 d5 11. f4 Bb4 12. Nc3 h5 13. Qe2 O-O 14. h3 Bxc3 15. Ba4 Kh8 16. Qa6 g6 17. Bxc6 Nd7 18. Qe6 Rf7 19. Bh6 Nf6 20. Bg7 Kh7 - Oct 14 04:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 18. Qe6 Rf7 19. Bh6 Nf6 20. Bg7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 e5 7. d4 e4 8. Nd8 Be7 9. Bg5 Nf6 10. Nxb7 d5 11. f4 Bb4 12. Nc3 h5 13. Qe2 O-O 14. h3 Bxc3 15. Ba4 Kh8 16. Qa6 g6 17. Bxc6 Nd7 18. Qe6 Rf7 19. Bh6 Nf6 20. Bg7 - Oct 14 04:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Nd7 18. Qe6 Rf7 19. Bh6 Nf6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 e5 7. d4 e4 8. Nd8 Be7 9. Bg5 Nf6 10. Nxb7 d5 11. f4 Bb4 12. Nc3 h5 13. Qe2 O-O 14. h3 Bxc3 15. Ba4 Kh8 16. Qa6 g6 17. Bxc6 Nd7 18. Qe6 Rf7 19. Bh6 Nf6 - Oct 14 04:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 17. Bxc6 Nd7 18. Qe6 Rf7 19. Bh6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 e5 7. d4 e4 8. Nd8 Be7 9. Bg5 Nf6 10. Nxb7 d5 11. f4 Bb4 12. Nc3 h5 13. Qe2 O-O 14. h3 Bxc3 15. Ba4 Kh8 16. Qa6 g6 17. Bxc6 Nd7 18. Qe6 Rf7 19. Bh6 - Oct 14 04:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … g6 17. Bxc6 Nd7 18. Qe6 Rf7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 e5 7. d4 e4 8. Nd8 Be7 9. Bg5 Nf6 10. Nxb7 d5 11. f4 Bb4 12. Nc3 h5 13. Qe2 O-O 14. h3 Bxc3 15. Ba4 Kh8 16. Qa6 g6 17. Bxc6 Nd7 18. Qe6 Rf7