79.2M
positions
15.2M
practically solved
285.73T
engine nodes
2.2M
analyses
7,289
in queue
6
active workers
34
active cores
14.7M
nodes / sec
10.6
positions / min
82
proof number
4,106
disproof number
Root conquest: 0/20 first moves solved · 19.2% of tree positions solved · last 24h: 316,071 closures, 5.84T 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 2.0m (median of 17) · measured at 2026-10-08 21:00 UTC
Closures by source, last 24h (316071 of 316071 labelled): USER 95.7% (302400) · FILL 0.5% (1651) · AUTO 3.8% (11927) · SOLVE 0.0% (0) · NONE 0.0% (93) · last 7d (1763855 of 1763855): USER 99.0% (1745946) · FILL 0.1% (2071) · AUTO 0.7% (11952) · SOLVE 0.0% (0) · NONE 0.2% (3886). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nh3 d5 2. Nc3 h6 … h4 16. Rg1 d3 17. Nd5 f5 (User) · 512.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 c6 … 13. Bf4 e5 14. Qb6 Nf6 15. Qxa6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. Nc3 c6 … 13. Bf4 e5 14. Qb6 Nf6 15. Qd6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. e4 e6 … 29. Bd3 Ke7 30. Kf1 a5 31. Ke1 (User) · 2.00B nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … 9. b4 Kf7 10. a4 Na6 11. a5 (User) · 128.0M nodes · randomchampgamer-2026PC-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 51.6% of the fleet | 3.01T | 23,128 |
| 2 | BManBJ 25.9% of the fleet | 1.51T | 10,430 |
| 3 | randomchampgamer 11.3% of the fleet | 660.63B | 4,639 |
| 4 | RickEdinson 7.5% of the fleet | 435.95B | 2,916 |
| 5 | MoNiKaMaDnEsS 3.3% of the fleet | 193.30B | 1,673 |
| 6 | tenzink 0.3% of the fleet | 17.02B | 86 |
| 7 | soothdest <0.1% of the fleet | 2.73B | 31 |
| 8 | NeoArcturus <0.1% of the fleet | 546.0M | 5 |
8 accounts · 5.84T 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 | 42.86T | 300,350 |
| 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 | 16.19T | 118,701 |
| 6 | RickEdinson 3.8% of the fleet | 10.76T | 71,871 |
| 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 · 285.82T 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 21 proposals · see every proposal
Milestones
- Oct 08 21:57 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … e5 14. Qb6 Nf6 15. Qc6 O-O-O
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. O-O axb5 8. h3 h5 9. Qd3 b5 10. Qc3 Qc7 11. Ne5 Ba6 12. Qa5 fxe5 13. Bf4 e5 14. Qb6 Nf6 15. Qc6 O-O-O - Oct 08 21:57 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … e5 14. Qb6 Nf6 15. Qc6 h4
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. O-O axb5 8. h3 h5 9. Qd3 b5 10. Qc3 Qc7 11. Ne5 Ba6 12. Qa5 fxe5 13. Bf4 e5 14. Qb6 Nf6 15. Qc6 h4 - Oct 08 21:57 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … e5 14. Qb6 Nf6 15. Qc6 b4
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. O-O axb5 8. h3 h5 9. Qd3 b5 10. Qc3 Qc7 11. Ne5 Ba6 12. Qa5 fxe5 13. Bf4 e5 14. Qb6 Nf6 15. Qc6 b4 - Oct 08 21:57 Solved: BLACK_WIN via MINIMAXview
1. Nf3 f6 2. e4 e6 … 13. Bf4 e5 14. Qb6 Nf6 15. Qxb5
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. O-O axb5 8. h3 h5 9. Qd3 b5 10. Qc3 Qc7 11. Ne5 Ba6 12. Qa5 fxe5 13. Bf4 e5 14. Qb6 Nf6 15. Qxb5 - Oct 08 21:57 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 26. Kg2 Qg1 27. Kf3 Qf2 28. Ke4
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. O-O axb5 8. h3 h5 9. Qd3 b5 10. Qc3 Qc7 11. Ne5 Ba6 12. Qa5 fxe5 13. Bf4 e5 14. Qb6 Nf6 15. Qxb5 exf4 16. f4 Qc4 17. Kh1 Qe2 18. Rf2 Qe3 19. g3 Rxa2 20. h4 Bd6 21. e5 Ne4 22. f5 Nxg3 23. e6 O-O 24. e7 Re8 25. f6 gxf6 26. Kg2 Qg1 27. Kf3 Qf2 28. Ke4 - Oct 08 21:57 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … gxf6 26. Kg2 Qg1 27. Kf3 Qf2
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. O-O axb5 8. h3 h5 9. Qd3 b5 10. Qc3 Qc7 11. Ne5 Ba6 12. Qa5 fxe5 13. Bf4 e5 14. Qb6 Nf6 15. Qxb5 exf4 16. f4 Qc4 17. Kh1 Qe2 18. Rf2 Qe3 19. g3 Rxa2 20. h4 Bd6 21. e5 Ne4 22. f5 Nxg3 23. e6 O-O 24. e7 Re8 25. f6 gxf6 26. Kg2 Qg1 27. Kf3 Qf2 - Oct 08 21:57 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 25. f6 gxf6 26. Kg2 Qg1 27. Kf3
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. O-O axb5 8. h3 h5 9. Qd3 b5 10. Qc3 Qc7 11. Ne5 Ba6 12. Qa5 fxe5 13. Bf4 e5 14. Qb6 Nf6 15. Qxb5 exf4 16. f4 Qc4 17. Kh1 Qe2 18. Rf2 Qe3 19. g3 Rxa2 20. h4 Bd6 21. e5 Ne4 22. f5 Nxg3 23. e6 O-O 24. e7 Re8 25. f6 gxf6 26. Kg2 Qg1 27. Kf3 - Oct 08 21:57 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Re8 25. f6 gxf6 26. Kg2 Qg1
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. O-O axb5 8. h3 h5 9. Qd3 b5 10. Qc3 Qc7 11. Ne5 Ba6 12. Qa5 fxe5 13. Bf4 e5 14. Qb6 Nf6 15. Qxb5 exf4 16. f4 Qc4 17. Kh1 Qe2 18. Rf2 Qe3 19. g3 Rxa2 20. h4 Bd6 21. e5 Ne4 22. f5 Nxg3 23. e6 O-O 24. e7 Re8 25. f6 gxf6 26. Kg2 Qg1 - Oct 08 21:57 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 24. e7 Re8 25. f6 gxf6 26. Kg2
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. O-O axb5 8. h3 h5 9. Qd3 b5 10. Qc3 Qc7 11. Ne5 Ba6 12. Qa5 fxe5 13. Bf4 e5 14. Qb6 Nf6 15. Qxb5 exf4 16. f4 Qc4 17. Kh1 Qe2 18. Rf2 Qe3 19. g3 Rxa2 20. h4 Bd6 21. e5 Ne4 22. f5 Nxg3 23. e6 O-O 24. e7 Re8 25. f6 gxf6 26. Kg2 - Oct 08 21:57 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … O-O 24. e7 Re8 25. f6 gxf6
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. O-O axb5 8. h3 h5 9. Qd3 b5 10. Qc3 Qc7 11. Ne5 Ba6 12. Qa5 fxe5 13. Bf4 e5 14. Qb6 Nf6 15. Qxb5 exf4 16. f4 Qc4 17. Kh1 Qe2 18. Rf2 Qe3 19. g3 Rxa2 20. h4 Bd6 21. e5 Ne4 22. f5 Nxg3 23. e6 O-O 24. e7 Re8 25. f6 gxf6 - Oct 08 21:57 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 23. e6 O-O 24. e7 Re8 25. f6
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. O-O axb5 8. h3 h5 9. Qd3 b5 10. Qc3 Qc7 11. Ne5 Ba6 12. Qa5 fxe5 13. Bf4 e5 14. Qb6 Nf6 15. Qxb5 exf4 16. f4 Qc4 17. Kh1 Qe2 18. Rf2 Qe3 19. g3 Rxa2 20. h4 Bd6 21. e5 Ne4 22. f5 Nxg3 23. e6 O-O 24. e7 Re8 25. f6 - Oct 08 21:57 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Nxg3 23. e6 O-O 24. e7 Re8
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. O-O axb5 8. h3 h5 9. Qd3 b5 10. Qc3 Qc7 11. Ne5 Ba6 12. Qa5 fxe5 13. Bf4 e5 14. Qb6 Nf6 15. Qxb5 exf4 16. f4 Qc4 17. Kh1 Qe2 18. Rf2 Qe3 19. g3 Rxa2 20. h4 Bd6 21. e5 Ne4 22. f5 Nxg3 23. e6 O-O 24. e7 Re8