80.4M
positions
15.5M
practically solved
290.75T
engine nodes
2.2M
analyses
3,428
in queue
3
active workers
22
active cores
5.1M
nodes / sec
4.7
positions / min
82
proof number
4,106
disproof number
Root conquest: 0/20 first moves solved · 19.3% of tree positions solved · last 24h: 283,569 closures, 4.56T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 over 219 open obligations, of which 41 (18.7%) 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 1.5h (median of 34) · measured at 2026-10-10 01:00 UTC
Closures by source, last 24h (283569 of 283569 labelled): USER 100.0% (283520) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.0% (49) · last 7d (1681687 of 1681687): USER 99.0% (1664916) · FILL 0.1% (2071) · AUTO 0.7% (11952) · SOLVE 0.0% (0) · NONE 0.2% (2748). 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 … Nxe5 20. f4 Bd2 21. c5 b6 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … 21. Bxa6 Be7 22. b4 Ne5 23. b5 (User) · 512.0M nodes · randomchampgamer-2026PC-atomicdb
- 1. Nf3 f6 2. e4 e6 … 15. Nf6 d5 16. d4 b6 17. Qh3 (User) · 512.0M 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 | 1094 | 2 | |
| g1h3 | unsolved | 820 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| e2e4 | unsolved | 400 | 2 | |
| d2d4 | unsolved | 379 | 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 41.4% of the fleet | 1.89T | 12,733 |
| 2 | BManBJ 32.2% of the fleet | 1.47T | 9,320 |
| 3 | randomchampgamer 14.5% of the fleet | 659.20B | 4,737 |
| 4 | RickEdinson 9.6% of the fleet | 436.26B | 2,743 |
| 5 | MoNiKaMaDnEsS 2.4% of the fleet | 107.50B | 662 |
| 6 | soothdest <0.1% of the fleet | 8.0M | 17 |
6 accounts · 4.56T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 31.1% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 15.3% of the fleet | 44.58T | 311,412 |
| 3 | tenzink 14.7% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.8% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 5.8% of the fleet | 16.96T | 124,275 |
| 6 | RickEdinson 3.9% of the fleet | 11.27T | 75,077 |
| 7 | JackIV 3.5% of the fleet | 10.06T | 67,859 |
| 8 | Torom 3.2% of the fleet | 9.26T | 68,482 |
| 9 | gannet 2.5% of the fleet | 7.24T | 46,848 |
| 10 | MoNiKaMaDnEsS 2.2% of the fleet | 6.31T | 42,670 |
and 25 more.
35 accounts · 290.81T 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 22 proposals · see every proposal
Milestones
- Oct 10 01:51 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … h4 38. a7 g2 39. Kg1 h3
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O Bd6 7. e5 Bb4 8. h3 Nh6 9. c3 Ng4 10. Kh1 O-O 11. Ng5 h6 12. Nh7 Kh8 13. hxg4 fxe5 14. Qg4 Qg5 15. Nxf8 b6 16. f4 Ba6 17. f5 Rf8 18. f6 g6 19. Qxg5 Ne5 20. Bxa6 Bd6 21. d3 Ng4 22. f7 Nf2 23. Rxf2 Bh2 24. b4 g5 25. Ba3 b5 26. g3 Bxg3 27. c4 Kg7 28. Rc1 h5 29. cxb5 Kh7 30. Rc8 Rxf7 31. b5 d6 32. b6 axb6 33. Rc7 Kg8 34. Bb2 e5 35. a4 g4 36. a5 g3 37. a6 h4 38. a7 g2 39. Kg1 h3 - Oct 10 01:51 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 37. a6 h4 38. a7 g2 39. Kg1
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O Bd6 7. e5 Bb4 8. h3 Nh6 9. c3 Ng4 10. Kh1 O-O 11. Ng5 h6 12. Nh7 Kh8 13. hxg4 fxe5 14. Qg4 Qg5 15. Nxf8 b6 16. f4 Ba6 17. f5 Rf8 18. f6 g6 19. Qxg5 Ne5 20. Bxa6 Bd6 21. d3 Ng4 22. f7 Nf2 23. Rxf2 Bh2 24. b4 g5 25. Ba3 b5 26. g3 Bxg3 27. c4 Kg7 28. Rc1 h5 29. cxb5 Kh7 30. Rc8 Rxf7 31. b5 d6 32. b6 axb6 33. Rc7 Kg8 34. Bb2 e5 35. a4 g4 36. a5 g3 37. a6 h4 38. a7 g2 39. Kg1 - Oct 10 01:51 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … g3 37. a6 h4 38. a7 g2
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O Bd6 7. e5 Bb4 8. h3 Nh6 9. c3 Ng4 10. Kh1 O-O 11. Ng5 h6 12. Nh7 Kh8 13. hxg4 fxe5 14. Qg4 Qg5 15. Nxf8 b6 16. f4 Ba6 17. f5 Rf8 18. f6 g6 19. Qxg5 Ne5 20. Bxa6 Bd6 21. d3 Ng4 22. f7 Nf2 23. Rxf2 Bh2 24. b4 g5 25. Ba3 b5 26. g3 Bxg3 27. c4 Kg7 28. Rc1 h5 29. cxb5 Kh7 30. Rc8 Rxf7 31. b5 d6 32. b6 axb6 33. Rc7 Kg8 34. Bb2 e5 35. a4 g4 36. a5 g3 37. a6 h4 38. a7 g2 - Oct 10 01:51 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 36. a5 g3 37. a6 h4 38. a7
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O Bd6 7. e5 Bb4 8. h3 Nh6 9. c3 Ng4 10. Kh1 O-O 11. Ng5 h6 12. Nh7 Kh8 13. hxg4 fxe5 14. Qg4 Qg5 15. Nxf8 b6 16. f4 Ba6 17. f5 Rf8 18. f6 g6 19. Qxg5 Ne5 20. Bxa6 Bd6 21. d3 Ng4 22. f7 Nf2 23. Rxf2 Bh2 24. b4 g5 25. Ba3 b5 26. g3 Bxg3 27. c4 Kg7 28. Rc1 h5 29. cxb5 Kh7 30. Rc8 Rxf7 31. b5 d6 32. b6 axb6 33. Rc7 Kg8 34. Bb2 e5 35. a4 g4 36. a5 g3 37. a6 h4 38. a7 - Oct 10 01:51 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … g4 36. a5 g3 37. a6 h4
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O Bd6 7. e5 Bb4 8. h3 Nh6 9. c3 Ng4 10. Kh1 O-O 11. Ng5 h6 12. Nh7 Kh8 13. hxg4 fxe5 14. Qg4 Qg5 15. Nxf8 b6 16. f4 Ba6 17. f5 Rf8 18. f6 g6 19. Qxg5 Ne5 20. Bxa6 Bd6 21. d3 Ng4 22. f7 Nf2 23. Rxf2 Bh2 24. b4 g5 25. Ba3 b5 26. g3 Bxg3 27. c4 Kg7 28. Rc1 h5 29. cxb5 Kh7 30. Rc8 Rxf7 31. b5 d6 32. b6 axb6 33. Rc7 Kg8 34. Bb2 e5 35. a4 g4 36. a5 g3 37. a6 h4 - Oct 10 01:51 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 35. a4 g4 36. a5 g3 37. a6
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O Bd6 7. e5 Bb4 8. h3 Nh6 9. c3 Ng4 10. Kh1 O-O 11. Ng5 h6 12. Nh7 Kh8 13. hxg4 fxe5 14. Qg4 Qg5 15. Nxf8 b6 16. f4 Ba6 17. f5 Rf8 18. f6 g6 19. Qxg5 Ne5 20. Bxa6 Bd6 21. d3 Ng4 22. f7 Nf2 23. Rxf2 Bh2 24. b4 g5 25. Ba3 b5 26. g3 Bxg3 27. c4 Kg7 28. Rc1 h5 29. cxb5 Kh7 30. Rc8 Rxf7 31. b5 d6 32. b6 axb6 33. Rc7 Kg8 34. Bb2 e5 35. a4 g4 36. a5 g3 37. a6 - Oct 10 01:51 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … e5 35. a4 g4 36. a5 g3
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O Bd6 7. e5 Bb4 8. h3 Nh6 9. c3 Ng4 10. Kh1 O-O 11. Ng5 h6 12. Nh7 Kh8 13. hxg4 fxe5 14. Qg4 Qg5 15. Nxf8 b6 16. f4 Ba6 17. f5 Rf8 18. f6 g6 19. Qxg5 Ne5 20. Bxa6 Bd6 21. d3 Ng4 22. f7 Nf2 23. Rxf2 Bh2 24. b4 g5 25. Ba3 b5 26. g3 Bxg3 27. c4 Kg7 28. Rc1 h5 29. cxb5 Kh7 30. Rc8 Rxf7 31. b5 d6 32. b6 axb6 33. Rc7 Kg8 34. Bb2 e5 35. a4 g4 36. a5 g3 - Oct 10 01:51 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 34. Bb2 e5 35. a4 g4 36. a5
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O Bd6 7. e5 Bb4 8. h3 Nh6 9. c3 Ng4 10. Kh1 O-O 11. Ng5 h6 12. Nh7 Kh8 13. hxg4 fxe5 14. Qg4 Qg5 15. Nxf8 b6 16. f4 Ba6 17. f5 Rf8 18. f6 g6 19. Qxg5 Ne5 20. Bxa6 Bd6 21. d3 Ng4 22. f7 Nf2 23. Rxf2 Bh2 24. b4 g5 25. Ba3 b5 26. g3 Bxg3 27. c4 Kg7 28. Rc1 h5 29. cxb5 Kh7 30. Rc8 Rxf7 31. b5 d6 32. b6 axb6 33. Rc7 Kg8 34. Bb2 e5 35. a4 g4 36. a5 - Oct 10 01:51 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Kg8 34. Bb2 e5 35. a4 g4
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O Bd6 7. e5 Bb4 8. h3 Nh6 9. c3 Ng4 10. Kh1 O-O 11. Ng5 h6 12. Nh7 Kh8 13. hxg4 fxe5 14. Qg4 Qg5 15. Nxf8 b6 16. f4 Ba6 17. f5 Rf8 18. f6 g6 19. Qxg5 Ne5 20. Bxa6 Bd6 21. d3 Ng4 22. f7 Nf2 23. Rxf2 Bh2 24. b4 g5 25. Ba3 b5 26. g3 Bxg3 27. c4 Kg7 28. Rc1 h5 29. cxb5 Kh7 30. Rc8 Rxf7 31. b5 d6 32. b6 axb6 33. Rc7 Kg8 34. Bb2 e5 35. a4 g4 - Oct 10 01:51 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 33. Rc7 Kg8 34. Bb2 e5 35. a4
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O Bd6 7. e5 Bb4 8. h3 Nh6 9. c3 Ng4 10. Kh1 O-O 11. Ng5 h6 12. Nh7 Kh8 13. hxg4 fxe5 14. Qg4 Qg5 15. Nxf8 b6 16. f4 Ba6 17. f5 Rf8 18. f6 g6 19. Qxg5 Ne5 20. Bxa6 Bd6 21. d3 Ng4 22. f7 Nf2 23. Rxf2 Bh2 24. b4 g5 25. Ba3 b5 26. g3 Bxg3 27. c4 Kg7 28. Rc1 h5 29. cxb5 Kh7 30. Rc8 Rxf7 31. b5 d6 32. b6 axb6 33. Rc7 Kg8 34. Bb2 e5 35. a4 - Oct 10 01:51 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … axb6 33. Rc7 Kg8 34. Bb2 e5
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O Bd6 7. e5 Bb4 8. h3 Nh6 9. c3 Ng4 10. Kh1 O-O 11. Ng5 h6 12. Nh7 Kh8 13. hxg4 fxe5 14. Qg4 Qg5 15. Nxf8 b6 16. f4 Ba6 17. f5 Rf8 18. f6 g6 19. Qxg5 Ne5 20. Bxa6 Bd6 21. d3 Ng4 22. f7 Nf2 23. Rxf2 Bh2 24. b4 g5 25. Ba3 b5 26. g3 Bxg3 27. c4 Kg7 28. Rc1 h5 29. cxb5 Kh7 30. Rc8 Rxf7 31. b5 d6 32. b6 axb6 33. Rc7 Kg8 34. Bb2 e5 - Oct 10 01:51 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 32. b6 axb6 33. Rc7 Kg8 34. Bb2
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O Bd6 7. e5 Bb4 8. h3 Nh6 9. c3 Ng4 10. Kh1 O-O 11. Ng5 h6 12. Nh7 Kh8 13. hxg4 fxe5 14. Qg4 Qg5 15. Nxf8 b6 16. f4 Ba6 17. f5 Rf8 18. f6 g6 19. Qxg5 Ne5 20. Bxa6 Bd6 21. d3 Ng4 22. f7 Nf2 23. Rxf2 Bh2 24. b4 g5 25. Ba3 b5 26. g3 Bxg3 27. c4 Kg7 28. Rc1 h5 29. cxb5 Kh7 30. Rc8 Rxf7 31. b5 d6 32. b6 axb6 33. Rc7 Kg8 34. Bb2