80.7M
positions
15.6M
practically solved
293.33T
engine nodes
2.2M
analyses
3,603
in queue
12
active workers
58
active cores
8.6M
nodes / sec
32.8
positions / min
82
proof number
4,106
disproof number
Root conquest: 0/20 first moves solved · 19.3% of tree positions solved · last 24h: 92,139 closures, 4.13T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 70 over 220 open obligations, of which 41 (18.6%) 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 6.5m (median of 9) · measured at 2026-10-10 18:00 UTC
Closures by source, last 24h (92139 of 92139 labelled): USER 100.0% (92113) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.0% (26) · last 7d (1658256 of 1658256): USER 99.0% (1642153) · FILL 0.1% (2071) · AUTO 0.7% (11952) · SOLVE 0.0% (0) · NONE 0.1% (2080). 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 … Qxb5 13. b4 Ra4 14. h4 g5 (User) · 512.0M nodes · BManBJ-Blake-atomicdb
- 1. g4 e6 2. Nf3 f6 … 12. a4 Be7 13. axb5 a6 14. f4 (User) · 512.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … Bd7 20. Rc3 Nh6 21. f3 Bc6 (User) · 128.0M nodes · randomchampgamer-2026PC-atomicdb
- 1. Nf3 f6 2. e4 e6 … 21. h4 b5 22. Rg1 Rc2 23. hxg5 (User) · 128.0M nodes · RickEdinson-MSI-atomicdb
- 1. Nf3 f6 2. e4 e6 … 32. h4 b5 33. g3 Rc1 34. Kb2 (User) · 128.0M nodes · Torom-torsten-pc-atomicdb#0
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 | 1090 | 2 | |
| g1h3 | unsolved | 819 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| e2e4 | unsolved | 400 | 2 | |
| d2d4 | unsolved | 387 | 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 32.4% of the fleet | 1.34T | 8,999 |
| 2 | BManBJ 31.7% of the fleet | 1.31T | 6,313 |
| 3 | randomchampgamer 16.2% of the fleet | 667.49B | 3,126 |
| 4 | RickEdinson 10.4% of the fleet | 431.16B | 2,010 |
| 5 | MoNiKaMaDnEsS 9.3% of the fleet | 383.23B | 1,671 |
| 6 | soothdest <0.1% of the fleet | 25.3M | 4 |
6 accounts · 4.13T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 30.8% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 15.5% of the fleet | 45.49T | 315,520 |
| 3 | tenzink 14.6% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.7% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 5.9% of the fleet | 17.44T | 126,138 |
| 6 | RickEdinson 3.9% of the fleet | 11.58T | 76,333 |
| 7 | JackIV 3.4% of the fleet | 10.06T | 67,859 |
| 8 | Torom 3.4% of the fleet | 9.95T | 72,981 |
| 9 | gannet 2.5% of the fleet | 7.24T | 46,848 |
| 10 | MoNiKaMaDnEsS 2.3% of the fleet | 6.69T | 44,341 |
and 25 more.
35 accounts · 293.57T 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 23 proposals · see every proposal
Milestones
- Oct 10 18:56 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … b5 33. Nh7 Be7 34. Rg5 Kh8
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 h5 7. c3 Nh6 8. Ne5 fxe5 9. Bg5 Qf6 10. f4 Ng4 11. f5 Qxg5 12. Qxh5 g5 13. Rf1 e5 14. dxe5 d6 15. O-O-O d5 16. e5 g4 17. Rxd5 Kf7 18. Bc4 Kg7 19. f6 Kh7 20. e6 Bh6 21. Kb1 Bd2 22. f7 Bxe6 23. Bb5 Rhf8 24. Rf5 Rac8 25. c4 Bg5 26. b4 Rxc4 27. Rd5 Rc8 28. f8=N Kg8 29. Rc5 Re8 30. Re5 Rc8 31. a4 a5 32. h4 b5 33. Nh7 Be7 34. Rg5 Kh8 - Oct 10 18:56 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Be7 34. Rg5 Kf7 35. Rg7 Ke6
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 h5 7. c3 Nh6 8. Ne5 fxe5 9. Bg5 Qf6 10. f4 Ng4 11. f5 Qxg5 12. Qxh5 g5 13. Rf1 e5 14. dxe5 d6 15. O-O-O d5 16. e5 g4 17. Rxd5 Kf7 18. Bc4 Kg7 19. f6 Kh7 20. e6 Bh6 21. Kb1 Bd2 22. f7 Bxe6 23. Bb5 Rhf8 24. Rf5 Rac8 25. c4 Bg5 26. b4 Rxc4 27. Rd5 Rc8 28. f8=N Kg8 29. Rc5 Re8 30. Re5 Rc8 31. a4 a5 32. h4 b5 33. Nh7 Be7 34. Rg5 Kf7 35. Rg7 Ke6 - Oct 10 18:56 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 33. Nh7 Be7 34. Rg5 Kf7 35. Rg7
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 h5 7. c3 Nh6 8. Ne5 fxe5 9. Bg5 Qf6 10. f4 Ng4 11. f5 Qxg5 12. Qxh5 g5 13. Rf1 e5 14. dxe5 d6 15. O-O-O d5 16. e5 g4 17. Rxd5 Kf7 18. Bc4 Kg7 19. f6 Kh7 20. e6 Bh6 21. Kb1 Bd2 22. f7 Bxe6 23. Bb5 Rhf8 24. Rf5 Rac8 25. c4 Bg5 26. b4 Rxc4 27. Rd5 Rc8 28. f8=N Kg8 29. Rc5 Re8 30. Re5 Rc8 31. a4 a5 32. h4 b5 33. Nh7 Be7 34. Rg5 Kf7 35. Rg7 - Oct 10 18:56 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … b5 33. Nh7 Be7 34. Rg5 Kf7
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 h5 7. c3 Nh6 8. Ne5 fxe5 9. Bg5 Qf6 10. f4 Ng4 11. f5 Qxg5 12. Qxh5 g5 13. Rf1 e5 14. dxe5 d6 15. O-O-O d5 16. e5 g4 17. Rxd5 Kf7 18. Bc4 Kg7 19. f6 Kh7 20. e6 Bh6 21. Kb1 Bd2 22. f7 Bxe6 23. Bb5 Rhf8 24. Rf5 Rac8 25. c4 Bg5 26. b4 Rxc4 27. Rd5 Rc8 28. f8=N Kg8 29. Rc5 Re8 30. Re5 Rc8 31. a4 a5 32. h4 b5 33. Nh7 Be7 34. Rg5 Kf7 - Oct 10 18:56 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … b5 33. Nh7 Kg7 34. Re7 Kg6
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 h5 7. c3 Nh6 8. Ne5 fxe5 9. Bg5 Qf6 10. f4 Ng4 11. f5 Qxg5 12. Qxh5 g5 13. Rf1 e5 14. dxe5 d6 15. O-O-O d5 16. e5 g4 17. Rxd5 Kf7 18. Bc4 Kg7 19. f6 Kh7 20. e6 Bh6 21. Kb1 Bd2 22. f7 Bxe6 23. Bb5 Rhf8 24. Rf5 Rac8 25. c4 Bg5 26. b4 Rxc4 27. Rd5 Rc8 28. f8=N Kg8 29. Rc5 Re8 30. Re5 Rc8 31. a4 a5 32. h4 b5 33. Nh7 Kg7 34. Re7 Kg6 - Oct 10 18:56 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … b5 33. Nh7 Kg7 34. Re7 Kh6
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 h5 7. c3 Nh6 8. Ne5 fxe5 9. Bg5 Qf6 10. f4 Ng4 11. f5 Qxg5 12. Qxh5 g5 13. Rf1 e5 14. dxe5 d6 15. O-O-O d5 16. e5 g4 17. Rxd5 Kf7 18. Bc4 Kg7 19. f6 Kh7 20. e6 Bh6 21. Kb1 Bd2 22. f7 Bxe6 23. Bb5 Rhf8 24. Rf5 Rac8 25. c4 Bg5 26. b4 Rxc4 27. Rd5 Rc8 28. f8=N Kg8 29. Rc5 Re8 30. Re5 Rc8 31. a4 a5 32. h4 b5 33. Nh7 Kg7 34. Re7 Kh6 - Oct 10 18:56 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Kg7 34. Re7 Kg8 35. Rg7 Kh8
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 h5 7. c3 Nh6 8. Ne5 fxe5 9. Bg5 Qf6 10. f4 Ng4 11. f5 Qxg5 12. Qxh5 g5 13. Rf1 e5 14. dxe5 d6 15. O-O-O d5 16. e5 g4 17. Rxd5 Kf7 18. Bc4 Kg7 19. f6 Kh7 20. e6 Bh6 21. Kb1 Bd2 22. f7 Bxe6 23. Bb5 Rhf8 24. Rf5 Rac8 25. c4 Bg5 26. b4 Rxc4 27. Rd5 Rc8 28. f8=N Kg8 29. Rc5 Re8 30. Re5 Rc8 31. a4 a5 32. h4 b5 33. Nh7 Kg7 34. Re7 Kg8 35. Rg7 Kh8 - Oct 10 18:56 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 33. Nh7 Kg7 34. Re7 Kg8 35. Rg7
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 h5 7. c3 Nh6 8. Ne5 fxe5 9. Bg5 Qf6 10. f4 Ng4 11. f5 Qxg5 12. Qxh5 g5 13. Rf1 e5 14. dxe5 d6 15. O-O-O d5 16. e5 g4 17. Rxd5 Kf7 18. Bc4 Kg7 19. f6 Kh7 20. e6 Bh6 21. Kb1 Bd2 22. f7 Bxe6 23. Bb5 Rhf8 24. Rf5 Rac8 25. c4 Bg5 26. b4 Rxc4 27. Rd5 Rc8 28. f8=N Kg8 29. Rc5 Re8 30. Re5 Rc8 31. a4 a5 32. h4 b5 33. Nh7 Kg7 34. Re7 Kg8 35. Rg7 - Oct 10 18:56 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … b5 33. Nh7 Kg7 34. Re7 Kg8
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 h5 7. c3 Nh6 8. Ne5 fxe5 9. Bg5 Qf6 10. f4 Ng4 11. f5 Qxg5 12. Qxh5 g5 13. Rf1 e5 14. dxe5 d6 15. O-O-O d5 16. e5 g4 17. Rxd5 Kf7 18. Bc4 Kg7 19. f6 Kh7 20. e6 Bh6 21. Kb1 Bd2 22. f7 Bxe6 23. Bb5 Rhf8 24. Rf5 Rac8 25. c4 Bg5 26. b4 Rxc4 27. Rd5 Rc8 28. f8=N Kg8 29. Rc5 Re8 30. Re5 Rc8 31. a4 a5 32. h4 b5 33. Nh7 Kg7 34. Re7 Kg8 - Oct 10 18:56 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Kf7 35. Re7 Kg8 36. Rg7 Kh8
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 h5 7. c3 Nh6 8. Ne5 fxe5 9. Bg5 Qf6 10. f4 Ng4 11. f5 Qxg5 12. Qxh5 g5 13. Rf1 e5 14. dxe5 d6 15. O-O-O d5 16. e5 g4 17. Rxd5 Kf7 18. Bc4 Kg7 19. f6 Kh7 20. e6 Bh6 21. Kb1 Bd2 22. f7 Bxe6 23. Bb5 Rhf8 24. Rf5 Rac8 25. c4 Bg5 26. b4 Rxc4 27. Rd5 Rc8 28. f8=N Kg8 29. Rc5 Re8 30. Re5 Rc8 31. a4 a5 32. h4 b5 33. Nh7 Rc3 34. Re8 Kf7 35. Re7 Kg8 36. Rg7 Kh8 - Oct 10 18:56 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 34. Re8 Kf7 35. Re7 Kg8 36. Rg7
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 h5 7. c3 Nh6 8. Ne5 fxe5 9. Bg5 Qf6 10. f4 Ng4 11. f5 Qxg5 12. Qxh5 g5 13. Rf1 e5 14. dxe5 d6 15. O-O-O d5 16. e5 g4 17. Rxd5 Kf7 18. Bc4 Kg7 19. f6 Kh7 20. e6 Bh6 21. Kb1 Bd2 22. f7 Bxe6 23. Bb5 Rhf8 24. Rf5 Rac8 25. c4 Bg5 26. b4 Rxc4 27. Rd5 Rc8 28. f8=N Kg8 29. Rc5 Re8 30. Re5 Rc8 31. a4 a5 32. h4 b5 33. Nh7 Rc3 34. Re8 Kf7 35. Re7 Kg8 36. Rg7 - Oct 10 18:56 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Rc3 34. Re8 Kf7 35. Re7 Kg8
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 h5 7. c3 Nh6 8. Ne5 fxe5 9. Bg5 Qf6 10. f4 Ng4 11. f5 Qxg5 12. Qxh5 g5 13. Rf1 e5 14. dxe5 d6 15. O-O-O d5 16. e5 g4 17. Rxd5 Kf7 18. Bc4 Kg7 19. f6 Kh7 20. e6 Bh6 21. Kb1 Bd2 22. f7 Bxe6 23. Bb5 Rhf8 24. Rf5 Rac8 25. c4 Bg5 26. b4 Rxc4 27. Rd5 Rc8 28. f8=N Kg8 29. Rc5 Re8 30. Re5 Rc8 31. a4 a5 32. h4 b5 33. Nh7 Rc3 34. Re8 Kf7 35. Re7 Kg8