80.4M
positions
15.5M
practically solved
291.26T
engine nodes
2.2M
analyses
2,844
in queue
7
active workers
42
active cores
14.5M
nodes / sec
10.3
positions / min
82
proof number
4,106
disproof number
Root conquest: 0/20 first moves solved · 19.3% of tree positions solved · last 24h: 246,341 closures, 4.60T 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 4.5d (median of 25) · measured at 2026-10-10 06:00 UTC
Closures by source, last 24h (246341 of 246341 labelled): USER 100.0% (246283) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.0% (58) · last 7d (1662743 of 1662743): USER 99.0% (1646155) · FILL 0.1% (2071) · AUTO 0.7% (11952) · SOLVE 0.0% (0) · NONE 0.2% (2565). 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 … Be1 21. Rxa8 Ra8 22. f5 Ra4 (User) · 512.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … 22. f7 e5 23. a4 Nf2 24. Rxf2 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. e4 e6 … Rc4 23. e5 Rb4 24. Bc1 d6 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. e4 e6 … h4 22. f5 Ra8 23. Bd2 Kf8 (User) · 512.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … e5 23. a4 Nf2 24. Rxf2 Bb8 (User) · 128.0M nodes · MoNiKaMaDnEsS-DESKTOP-VG9VPVH-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 | 1080 | 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 41.0% of the fleet | 1.89T | 12,733 |
| 2 | BManBJ 30.1% of the fleet | 1.39T | 8,215 |
| 3 | randomchampgamer 14.8% of the fleet | 682.56B | 4,335 |
| 4 | RickEdinson 9.7% of the fleet | 447.81B | 2,601 |
| 5 | MoNiKaMaDnEsS 4.3% of the fleet | 200.08B | 1,075 |
| 6 | soothdest <0.1% of the fleet | 8.0M | 17 |
6 accounts · 4.60T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 31.0% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 15.4% of the fleet | 44.81T | 312,461 |
| 3 | tenzink 14.7% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.8% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 5.9% of the fleet | 17.12T | 124,957 |
| 6 | RickEdinson 3.9% of the fleet | 11.37T | 75,542 |
| 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 | 6.40T | 43,083 |
and 25 more.
35 accounts · 291.39T 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 06:56 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Kf6 38. Qh6 Ke5 39. Qd6 Kd4
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 Bg3 24. Bf4 e5 25. c4 Bf2 26. c5 g5 27. Bg3 Kh7 28. c6 Be3 29. c7 h5 30. c8=Q h4 31. Bf2 a5 32. Bxe3 a4 33. Qc4 e4 34. dxe4 h3 35. g4 d5 36. Qd3 Kg7 37. Qh7 Kf6 38. Qh6 Ke5 39. Qd6 Kd4 - Oct 10 06:56 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 37. Qh7 Kf6 38. Qh6 Ke5 39. Qd6
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 Bg3 24. Bf4 e5 25. c4 Bf2 26. c5 g5 27. Bg3 Kh7 28. c6 Be3 29. c7 h5 30. c8=Q h4 31. Bf2 a5 32. Bxe3 a4 33. Qc4 e4 34. dxe4 h3 35. g4 d5 36. Qd3 Kg7 37. Qh7 Kf6 38. Qh6 Ke5 39. Qd6 - Oct 10 06:56 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Kg7 37. Qh7 Kf6 38. Qh6 Ke5
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 Bg3 24. Bf4 e5 25. c4 Bf2 26. c5 g5 27. Bg3 Kh7 28. c6 Be3 29. c7 h5 30. c8=Q h4 31. Bf2 a5 32. Bxe3 a4 33. Qc4 e4 34. dxe4 h3 35. g4 d5 36. Qd3 Kg7 37. Qh7 Kf6 38. Qh6 Ke5 - Oct 10 06:56 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 36. Qd3 Kg7 37. Qh7 Kf6 38. Qh6
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 Bg3 24. Bf4 e5 25. c4 Bf2 26. c5 g5 27. Bg3 Kh7 28. c6 Be3 29. c7 h5 30. c8=Q h4 31. Bf2 a5 32. Bxe3 a4 33. Qc4 e4 34. dxe4 h3 35. g4 d5 36. Qd3 Kg7 37. Qh7 Kf6 38. Qh6 - Oct 10 06:56 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … d5 36. Qd3 Kg7 37. Qh7 Kf6
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 Bg3 24. Bf4 e5 25. c4 Bf2 26. c5 g5 27. Bg3 Kh7 28. c6 Be3 29. c7 h5 30. c8=Q h4 31. Bf2 a5 32. Bxe3 a4 33. Qc4 e4 34. dxe4 h3 35. g4 d5 36. Qd3 Kg7 37. Qh7 Kf6 - Oct 10 06:56 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 35. g4 d5 36. Qd3 Kg7 37. Qh7
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 Bg3 24. Bf4 e5 25. c4 Bf2 26. c5 g5 27. Bg3 Kh7 28. c6 Be3 29. c7 h5 30. c8=Q h4 31. Bf2 a5 32. Bxe3 a4 33. Qc4 e4 34. dxe4 h3 35. g4 d5 36. Qd3 Kg7 37. Qh7 - Oct 10 06:56 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … h3 35. g4 d5 36. Qd3 Kg7
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 Bg3 24. Bf4 e5 25. c4 Bf2 26. c5 g5 27. Bg3 Kh7 28. c6 Be3 29. c7 h5 30. c8=Q h4 31. Bf2 a5 32. Bxe3 a4 33. Qc4 e4 34. dxe4 h3 35. g4 d5 36. Qd3 Kg7 - Oct 10 06:56 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 34. dxe4 h3 35. g4 d5 36. Qd3
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 Bg3 24. Bf4 e5 25. c4 Bf2 26. c5 g5 27. Bg3 Kh7 28. c6 Be3 29. c7 h5 30. c8=Q h4 31. Bf2 a5 32. Bxe3 a4 33. Qc4 e4 34. dxe4 h3 35. g4 d5 36. Qd3 - Oct 10 06:56 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … e4 34. dxe4 h3 35. g4 d5
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 Bg3 24. Bf4 e5 25. c4 Bf2 26. c5 g5 27. Bg3 Kh7 28. c6 Be3 29. c7 h5 30. c8=Q h4 31. Bf2 a5 32. Bxe3 a4 33. Qc4 e4 34. dxe4 h3 35. g4 d5 - Oct 10 06:56 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 33. Qc4 e4 34. dxe4 h3 35. 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 Bg3 24. Bf4 e5 25. c4 Bf2 26. c5 g5 27. Bg3 Kh7 28. c6 Be3 29. c7 h5 30. c8=Q h4 31. Bf2 a5 32. Bxe3 a4 33. Qc4 e4 34. dxe4 h3 35. g4 - Oct 10 06:56 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … a4 33. Qc4 e4 34. dxe4 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 Bg3 24. Bf4 e5 25. c4 Bf2 26. c5 g5 27. Bg3 Kh7 28. c6 Be3 29. c7 h5 30. c8=Q h4 31. Bf2 a5 32. Bxe3 a4 33. Qc4 e4 34. dxe4 h3 - Oct 10 06:56 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 32. Bxe3 a4 33. Qc4 e4 34. dxe4
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 Bg3 24. Bf4 e5 25. c4 Bf2 26. c5 g5 27. Bg3 Kh7 28. c6 Be3 29. c7 h5 30. c8=Q h4 31. Bf2 a5 32. Bxe3 a4 33. Qc4 e4 34. dxe4