84.7M
positions
16.2M
practically solved
310.91T
engine nodes
2.4M
analyses
732
in queue
5
active workers
28
active cores
0
nodes / sec
11.9
positions / min
124
proof number
4,635
disproof number
Root conquest: 0/20 first moves solved · 19.1% of tree positions solved · last 24h: 151,289 closures, 2.63T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 over 212 open obligations, of which 40 (18.9%) sit at or below dn 2, one unanswered question from falling over · 0 open nodes on impossible numbers · measured at 2026-10-15 22:00 UTC
Closures by source, last 24h (151289 of 151289 labelled): USER 78.3% (118512) · FILL 2.0% (2961) · AUTO 19.7% (29748) · SOLVE 0.0% (0) · NONE 0.0% (68) · last 7d (920108 of 920108): USER 94.3% (867713) · FILL 0.5% (4619) · AUTO 5.1% (47293) · SOLVE 0.0% (0) · NONE 0.1% (483). 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 e6 … 10. f4 Nf6 11. g4 h5 12. f5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 c6 … 15. a5 Ng4 16. Kh1 Bd6 17. a6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. Nc3 c6 … 15. a5 Ng4 16. Kh1 Bd6 17. hxg4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. Nc3 c6 … 15. a5 Ng4 16. Kh1 Bd6 17. f4 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 c6 … 15. a5 Ng4 16. Kh1 Bd6 17. Bc1 (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 | 1160 | 2 | |
| g1h3 | unsolved | 763 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 400 | 2 | |
| e2e4 | unsolved | 400 | 2 | |
| b1c3 | unsolved | 138 | 2 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b1a3 | unsolved | 0 | 3 | |
| b2b4 | unsolved | -65 | 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 51.5% of the fleet | 1.35T | 14,570 |
| 2 | randomchampgamer 21.0% of the fleet | 552.86B | 5,098 |
| 3 | RickEdinson 15.9% of the fleet | 416.87B | 4,256 |
| 4 | MoNiKaMaDnEsS 11.6% of the fleet | 305.10B | 2,484 |
| 5 | NeoArcturus <0.1% of the fleet | 144.9M | 4 |
5 accounts · 2.63T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 29.0% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 16.5% of the fleet | 51.29T | 359,111 |
| 3 | tenzink 13.8% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.1% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 6.4% of the fleet | 19.85T | 140,897 |
| 6 | Torom 5.0% of the fleet | 15.70T | 113,354 |
| 7 | RickEdinson 4.4% of the fleet | 13.69T | 91,001 |
| 8 | JackIV 3.2% of the fleet | 10.06T | 67,859 |
| 9 | MoNiKaMaDnEsS 2.6% of the fleet | 8.02T | 53,934 |
| 10 | gannet 2.3% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 310.97T 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 15 22:43 Solved: WHITE_WIN via MINIMAXview
1. e4 c6 2. Nf3 e5 … g5 27. Rd5 a5 28. f4 Kg7
1. e4 c6 2. Nf3 e5 3. Nc3 f6 4. Nd5 cxd5 5. Bb5 g6 6. d4 Nc6 7. Be3 Bb4 8. c3 Nh6 9. Ng5 d5 10. dxe5 Ng4 11. f3 Be6 12. Qxd5 Ke7 13. Bd7 Nxe3 14. Ne6 Qb6 15. Nc5 Qd6 16. e5 Kf8 17. Ne6 Kg8 18. Nf8 h5 19. Be6 Qxe5 20. O-O Bd6 21. g3 Bc5 22. Kh1 Rd8 23. Rfe1 Be3 24. Nd7 h4 25. h3 hxg3 26. Rad1 g5 27. Rd5 a5 28. f4 Kg7 - Oct 15 22:43 Solved: WHITE_WIN via MINIMAXview
1. e4 c6 2. Nf3 e5 … g5 27. Rd5 a5 28. f4 Kf7
1. e4 c6 2. Nf3 e5 3. Nc3 f6 4. Nd5 cxd5 5. Bb5 g6 6. d4 Nc6 7. Be3 Bb4 8. c3 Nh6 9. Ng5 d5 10. dxe5 Ng4 11. f3 Be6 12. Qxd5 Ke7 13. Bd7 Nxe3 14. Ne6 Qb6 15. Nc5 Qd6 16. e5 Kf8 17. Ne6 Kg8 18. Nf8 h5 19. Be6 Qxe5 20. O-O Bd6 21. g3 Bc5 22. Kh1 Rd8 23. Rfe1 Be3 24. Nd7 h4 25. h3 hxg3 26. Rad1 g5 27. Rd5 a5 28. f4 Kf7 - Oct 15 22:42 Solved: WHITE_WIN via MINIMAXview
1. e4 c6 2. Nf3 e5 … g5 27. Rd5 a5 28. f4 Rxh3
1. e4 c6 2. Nf3 e5 3. Nc3 f6 4. Nd5 cxd5 5. Bb5 g6 6. d4 Nc6 7. Be3 Bb4 8. c3 Nh6 9. Ng5 d5 10. dxe5 Ng4 11. f3 Be6 12. Qxd5 Ke7 13. Bd7 Nxe3 14. Ne6 Qb6 15. Nc5 Qd6 16. e5 Kf8 17. Ne6 Kg8 18. Nf8 h5 19. Be6 Qxe5 20. O-O Bd6 21. g3 Bc5 22. Kh1 Rd8 23. Rfe1 Be3 24. Nd7 h4 25. h3 hxg3 26. Rad1 g5 27. Rd5 a5 28. f4 Rxh3 - Oct 15 22:42 Solved: WHITE_WIN via MATE_PVview
1. e4 c6 2. Nf3 e5 … Kh8 40. a6 Kg8 41. a7 Kf8
1. e4 c6 2. Nf3 e5 3. Nc3 f6 4. Nd5 cxd5 5. Bb5 g6 6. d4 Nc6 7. Be3 Bb4 8. c3 Nh6 9. Ng5 d5 10. dxe5 Ng4 11. f3 Be6 12. Qxd5 Ke7 13. Bd7 Nxe3 14. Ne6 Qb6 15. Nc5 Qd6 16. e5 Kf8 17. Ne6 Kg8 18. Nf8 h5 19. Be6 Qxe5 20. O-O Bd6 21. g3 Bc5 22. Kh1 Rd8 23. Rfe1 Be3 24. Nd7 h4 25. h3 hxg3 26. Rad1 g5 27. Rd5 a5 28. f4 Rxh3 29. Nb6 Rd6 30. Kg2 Bxb6 31. Rxd6 gxf4 32. Re7 f5 33. c4 Kf8 34. Kf3 a4 35. c5 Kg8 36. b4 axb3 37. a4 f4 38. c6 bxc6 39. a5 Kh8 40. a6 Kg8 41. a7 Kf8 - Oct 15 22:42 Solved: WHITE_WIN via MATE_PVview
1. e4 c6 2. Nf3 e5 … 39. a5 Kh8 40. a6 Kg8 41. a7
1. e4 c6 2. Nf3 e5 3. Nc3 f6 4. Nd5 cxd5 5. Bb5 g6 6. d4 Nc6 7. Be3 Bb4 8. c3 Nh6 9. Ng5 d5 10. dxe5 Ng4 11. f3 Be6 12. Qxd5 Ke7 13. Bd7 Nxe3 14. Ne6 Qb6 15. Nc5 Qd6 16. e5 Kf8 17. Ne6 Kg8 18. Nf8 h5 19. Be6 Qxe5 20. O-O Bd6 21. g3 Bc5 22. Kh1 Rd8 23. Rfe1 Be3 24. Nd7 h4 25. h3 hxg3 26. Rad1 g5 27. Rd5 a5 28. f4 Rxh3 29. Nb6 Rd6 30. Kg2 Bxb6 31. Rxd6 gxf4 32. Re7 f5 33. c4 Kf8 34. Kf3 a4 35. c5 Kg8 36. b4 axb3 37. a4 f4 38. c6 bxc6 39. a5 Kh8 40. a6 Kg8 41. a7 - Oct 15 22:42 Solved: WHITE_WIN via MATE_PVview
1. e4 c6 2. Nf3 e5 … bxc6 39. a5 Kh8 40. a6 Kg8
1. e4 c6 2. Nf3 e5 3. Nc3 f6 4. Nd5 cxd5 5. Bb5 g6 6. d4 Nc6 7. Be3 Bb4 8. c3 Nh6 9. Ng5 d5 10. dxe5 Ng4 11. f3 Be6 12. Qxd5 Ke7 13. Bd7 Nxe3 14. Ne6 Qb6 15. Nc5 Qd6 16. e5 Kf8 17. Ne6 Kg8 18. Nf8 h5 19. Be6 Qxe5 20. O-O Bd6 21. g3 Bc5 22. Kh1 Rd8 23. Rfe1 Be3 24. Nd7 h4 25. h3 hxg3 26. Rad1 g5 27. Rd5 a5 28. f4 Rxh3 29. Nb6 Rd6 30. Kg2 Bxb6 31. Rxd6 gxf4 32. Re7 f5 33. c4 Kf8 34. Kf3 a4 35. c5 Kg8 36. b4 axb3 37. a4 f4 38. c6 bxc6 39. a5 Kh8 40. a6 Kg8 - Oct 15 22:42 Solved: WHITE_WIN via MATE_PVview
1. e4 c6 2. Nf3 e5 … 38. c6 bxc6 39. a5 Kh8 40. a6
1. e4 c6 2. Nf3 e5 3. Nc3 f6 4. Nd5 cxd5 5. Bb5 g6 6. d4 Nc6 7. Be3 Bb4 8. c3 Nh6 9. Ng5 d5 10. dxe5 Ng4 11. f3 Be6 12. Qxd5 Ke7 13. Bd7 Nxe3 14. Ne6 Qb6 15. Nc5 Qd6 16. e5 Kf8 17. Ne6 Kg8 18. Nf8 h5 19. Be6 Qxe5 20. O-O Bd6 21. g3 Bc5 22. Kh1 Rd8 23. Rfe1 Be3 24. Nd7 h4 25. h3 hxg3 26. Rad1 g5 27. Rd5 a5 28. f4 Rxh3 29. Nb6 Rd6 30. Kg2 Bxb6 31. Rxd6 gxf4 32. Re7 f5 33. c4 Kf8 34. Kf3 a4 35. c5 Kg8 36. b4 axb3 37. a4 f4 38. c6 bxc6 39. a5 Kh8 40. a6 - Oct 15 22:42 Solved: WHITE_WIN via MATE_PVview
1. e4 c6 2. Nf3 e5 … f4 38. c6 bxc6 39. a5 Kh8
1. e4 c6 2. Nf3 e5 3. Nc3 f6 4. Nd5 cxd5 5. Bb5 g6 6. d4 Nc6 7. Be3 Bb4 8. c3 Nh6 9. Ng5 d5 10. dxe5 Ng4 11. f3 Be6 12. Qxd5 Ke7 13. Bd7 Nxe3 14. Ne6 Qb6 15. Nc5 Qd6 16. e5 Kf8 17. Ne6 Kg8 18. Nf8 h5 19. Be6 Qxe5 20. O-O Bd6 21. g3 Bc5 22. Kh1 Rd8 23. Rfe1 Be3 24. Nd7 h4 25. h3 hxg3 26. Rad1 g5 27. Rd5 a5 28. f4 Rxh3 29. Nb6 Rd6 30. Kg2 Bxb6 31. Rxd6 gxf4 32. Re7 f5 33. c4 Kf8 34. Kf3 a4 35. c5 Kg8 36. b4 axb3 37. a4 f4 38. c6 bxc6 39. a5 Kh8 - Oct 15 22:42 Solved: WHITE_WIN via MATE_PVview
1. e4 c6 2. Nf3 e5 … 37. a4 f4 38. c6 bxc6 39. a5
1. e4 c6 2. Nf3 e5 3. Nc3 f6 4. Nd5 cxd5 5. Bb5 g6 6. d4 Nc6 7. Be3 Bb4 8. c3 Nh6 9. Ng5 d5 10. dxe5 Ng4 11. f3 Be6 12. Qxd5 Ke7 13. Bd7 Nxe3 14. Ne6 Qb6 15. Nc5 Qd6 16. e5 Kf8 17. Ne6 Kg8 18. Nf8 h5 19. Be6 Qxe5 20. O-O Bd6 21. g3 Bc5 22. Kh1 Rd8 23. Rfe1 Be3 24. Nd7 h4 25. h3 hxg3 26. Rad1 g5 27. Rd5 a5 28. f4 Rxh3 29. Nb6 Rd6 30. Kg2 Bxb6 31. Rxd6 gxf4 32. Re7 f5 33. c4 Kf8 34. Kf3 a4 35. c5 Kg8 36. b4 axb3 37. a4 f4 38. c6 bxc6 39. a5 - Oct 15 22:42 Solved: WHITE_WIN via MATE_PVview
1. e4 c6 2. Nf3 e5 … axb3 37. a4 f4 38. c6 bxc6
1. e4 c6 2. Nf3 e5 3. Nc3 f6 4. Nd5 cxd5 5. Bb5 g6 6. d4 Nc6 7. Be3 Bb4 8. c3 Nh6 9. Ng5 d5 10. dxe5 Ng4 11. f3 Be6 12. Qxd5 Ke7 13. Bd7 Nxe3 14. Ne6 Qb6 15. Nc5 Qd6 16. e5 Kf8 17. Ne6 Kg8 18. Nf8 h5 19. Be6 Qxe5 20. O-O Bd6 21. g3 Bc5 22. Kh1 Rd8 23. Rfe1 Be3 24. Nd7 h4 25. h3 hxg3 26. Rad1 g5 27. Rd5 a5 28. f4 Rxh3 29. Nb6 Rd6 30. Kg2 Bxb6 31. Rxd6 gxf4 32. Re7 f5 33. c4 Kf8 34. Kf3 a4 35. c5 Kg8 36. b4 axb3 37. a4 f4 38. c6 bxc6 - Oct 15 22:42 Solved: WHITE_WIN via MATE_PVview
1. e4 c6 2. Nf3 e5 … 36. b4 axb3 37. a4 f4 38. c6
1. e4 c6 2. Nf3 e5 3. Nc3 f6 4. Nd5 cxd5 5. Bb5 g6 6. d4 Nc6 7. Be3 Bb4 8. c3 Nh6 9. Ng5 d5 10. dxe5 Ng4 11. f3 Be6 12. Qxd5 Ke7 13. Bd7 Nxe3 14. Ne6 Qb6 15. Nc5 Qd6 16. e5 Kf8 17. Ne6 Kg8 18. Nf8 h5 19. Be6 Qxe5 20. O-O Bd6 21. g3 Bc5 22. Kh1 Rd8 23. Rfe1 Be3 24. Nd7 h4 25. h3 hxg3 26. Rad1 g5 27. Rd5 a5 28. f4 Rxh3 29. Nb6 Rd6 30. Kg2 Bxb6 31. Rxd6 gxf4 32. Re7 f5 33. c4 Kf8 34. Kf3 a4 35. c5 Kg8 36. b4 axb3 37. a4 f4 38. c6 - Oct 15 22:42 Solved: WHITE_WIN via MATE_PVview
1. e4 c6 2. Nf3 e5 … Kg8 36. b4 axb3 37. a4 f4
1. e4 c6 2. Nf3 e5 3. Nc3 f6 4. Nd5 cxd5 5. Bb5 g6 6. d4 Nc6 7. Be3 Bb4 8. c3 Nh6 9. Ng5 d5 10. dxe5 Ng4 11. f3 Be6 12. Qxd5 Ke7 13. Bd7 Nxe3 14. Ne6 Qb6 15. Nc5 Qd6 16. e5 Kf8 17. Ne6 Kg8 18. Nf8 h5 19. Be6 Qxe5 20. O-O Bd6 21. g3 Bc5 22. Kh1 Rd8 23. Rfe1 Be3 24. Nd7 h4 25. h3 hxg3 26. Rad1 g5 27. Rd5 a5 28. f4 Rxh3 29. Nb6 Rd6 30. Kg2 Bxb6 31. Rxd6 gxf4 32. Re7 f5 33. c4 Kf8 34. Kf3 a4 35. c5 Kg8 36. b4 axb3 37. a4 f4