85.5M
positions
16.3M
practically solved
312.78T
engine nodes
2.4M
analyses
16
in queue
6
active workers
36
active cores
8.9M
nodes / sec
21.2
positions / min
152
proof number
4,740
disproof number
Root conquest: 0/20 first moves solved · 19.1% of tree positions solved · last 24h: 102,519 closures, 2.30T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 over 210 open obligations, of which 39 (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 1.2m (median of 5) · measured at 2026-10-16 18:00 UTC
Closures by source, last 24h (102519 of 102519 labelled): USER 65.2% (66846) · FILL 1.8% (1796) · AUTO 33.0% (33818) · SOLVE 0.0% (0) · NONE 0.1% (59) · last 7d (744084 of 744084): USER 88.8% (660475) · FILL 0.8% (6179) · AUTO 10.3% (76958) · SOLVE 0.0% (0) · NONE 0.1% (472). 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 … d5 17. O-O Bf5 18. g4 Rb8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … 9. e5 f5 10. g5 b4 11. Nb5 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. e4 e6 … d5 17. O-O Bf5 18. g4 Re8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. e4 e6 … d5 17. O-O Bf5 18. g4 Rd8 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nh3 d5 2. Nc3 h6 … a5 15. g3 Be1 16. f3 d3 (User) · 512.0M 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 | 1122 | 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 63.0% of the fleet | 1.45T | 17,094 |
| 2 | RickEdinson 18.2% of the fleet | 419.88B | 4,939 |
| 3 | MoNiKaMaDnEsS 16.0% of the fleet | 368.68B | 3,939 |
| 4 | randomchampgamer 2.8% of the fleet | 63.58B | 374 |
4 accounts · 2.30T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 28.9% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 16.8% of the fleet | 52.49T | 373,546 |
| 3 | tenzink 13.7% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.0% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 6.3% of the fleet | 19.85T | 140,897 |
| 6 | Torom 5.0% of the fleet | 15.70T | 113,354 |
| 7 | RickEdinson 4.5% of the fleet | 14.04T | 95,157 |
| 8 | JackIV 3.2% of the fleet | 10.06T | 67,859 |
| 9 | MoNiKaMaDnEsS 2.7% of the fleet | 8.34T | 57,551 |
| 10 | gannet 2.3% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 312.84T 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 16 18:38 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … f5 10. g5 b4 11. Qh5 Kd7
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 Bd6 6. Ne5 Bxe5 7. h4 d6 8. Bd3 b5 9. e5 f5 10. g5 b4 11. Qh5 Kd7 - Oct 16 18:38 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … f5 10. g5 b4 11. Qh5 Ke7
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 Bd6 6. Ne5 Bxe5 7. h4 d6 8. Bd3 b5 9. e5 f5 10. g5 b4 11. Qh5 Ke7 - Oct 16 18:38 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … f5 10. g5 b4 11. Qh5 Kf8
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 Bd6 6. Ne5 Bxe5 7. h4 d6 8. Bd3 b5 9. e5 f5 10. g5 b4 11. Qh5 Kf8 - Oct 16 18:37 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. e4 e6 … d5 17. O-O Bf5 18. g4 Nxg4
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Bb4 6. c3 h5 7. Bb5 Nc6 8. Ne5 Nh6 9. h3 fxe5 10. Bg5 O-O 11. f4 Rf6 12. f5 Qf8 13. Qf3 Kh8 14. fxe6 Qf4 15. Bf6 gxf6 16. Qxf4 d5 17. O-O Bf5 18. g4 Nxg4 - Oct 16 18:37 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥96 · … Kg3 Ke2 Kf3 Qde3
deep line, ply ≥96 · … Kg3 Ke2 Kf3 Qde3 - Oct 16 18:37 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥96 · … a3 Kg3 Ke2 Kf3
deep line, ply ≥96 · … a3 Kg3 Ke2 Kf3 - Oct 16 18:37 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥96 · … Kg2 a3 Kg3 Ke2
deep line, ply ≥96 · … Kg2 a3 Kg3 Ke2 - Oct 16 18:37 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥96 · … Kf3 Kg2 a3 Kg3
deep line, ply ≥96 · … Kf3 Kg2 a3 Kg3 - Oct 16 18:37 Solved: WHITE_WIN via MATE_PVview
… Nf3 e6 Na3 c6 Nb5 cxb5 d4 Bb4 c3 h5 Bb5 Nc6 Ne5 Nh6 h3 fxe5 Bg5 O-O f4 Rf6 f5 Qf8 Qf3 Kh8 fxe6 Qf4 Bf6 gxf6 Qxf4 d5 O-O Bf5 g4 Nxg4 Rf6 Rg8 Rg6 Rxg6 exd5 Bd6 Kh1 a6 Be8 Kg7 Rg1 Bg3 Rf1 Bf2 d5 Kf6 d6 Ke5 Bf7 b5 d7 Bb6 Rf5 Ke4 Rxb5 Kf3 c4 Kf2 d8=Q Kg2 c5 Kg3 Qf6 Kh2 c6 Kg2 c7 Kg1 Qf2 Kg2 Kg1 Kh2 c8=Q Kg2 Bd5 Kf1 Kg2 a5 Qc1 Kg1 Kf1 Kg2 h4 Kg1 Ke2 Kf1 Qd2 a4 Kf3 Kg2 a3
… Nf3 e6 Na3 c6 Nb5 cxb5 d4 Bb4 c3 h5 Bb5 Nc6 Ne5 Nh6 h3 fxe5 Bg5 O-O f4 Rf6 f5 Qf8 Qf3 Kh8 fxe6 Qf4 Bf6 gxf6 Qxf4 d5 O-O Bf5 g4 Nxg4 Rf6 Rg8 Rg6 Rxg6 exd5 Bd6 Kh1 a6 Be8 Kg7 Rg1 Bg3 Rf1 Bf2 d5 Kf6 d6 Ke5 Bf7 b5 d7 Bb6 Rf5 Ke4 Rxb5 Kf3 c4 Kf2 d8=Q Kg2 c5 Kg3 Qf6 Kh2 c6 Kg2 c7 Kg1 Qf2 Kg2 Kg1 Kh2 c8=Q Kg2 Bd5 Kf1 Kg2 a5 Qc1 Kg1 Kf1 Kg2 h4 Kg1 Ke2 Kf1 Qd2 a4 Kf3 Kg2 a3 - Oct 16 18:37 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Kf1 47. Qd2 a4 48. Kf3 Kg2
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Bb4 6. c3 h5 7. Bb5 Nc6 8. Ne5 Nh6 9. h3 fxe5 10. Bg5 O-O 11. f4 Rf6 12. f5 Qf8 13. Qf3 Kh8 14. fxe6 Qf4 15. Bf6 gxf6 16. Qxf4 d5 17. O-O Bf5 18. g4 Nxg4 19. Rf6 Rg8 20. Rg6 Rxg6 21. exd5 Bd6 22. Kh1 a6 23. Be8 Kg7 24. Rg1 Bg3 25. Rf1 Bf2 26. d5 Kf6 27. d6 Ke5 28. Bf7 b5 29. d7 Bb6 30. Rf5 Ke4 31. Rxb5 Kf3 32. c4 Kf2 33. d8=Q Kg2 34. c5 Kg3 35. Qf6 Kh2 36. c6 Kg2 37. c7 Kg1 38. Qf2 Kg2 39. Kg1 Kh2 40. c8=Q Kg2 41. Bd5 Kf1 42. Kg2 a5 43. Qc1 Kg1 44. Kf1 Kg2 45. h4 Kg1 46. Ke2 Kf1 47. Qd2 a4 48. Kf3 Kg2 - Oct 16 18:37 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 46. Ke2 Kf1 47. Qd2 a4 48. Kf3
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Bb4 6. c3 h5 7. Bb5 Nc6 8. Ne5 Nh6 9. h3 fxe5 10. Bg5 O-O 11. f4 Rf6 12. f5 Qf8 13. Qf3 Kh8 14. fxe6 Qf4 15. Bf6 gxf6 16. Qxf4 d5 17. O-O Bf5 18. g4 Nxg4 19. Rf6 Rg8 20. Rg6 Rxg6 21. exd5 Bd6 22. Kh1 a6 23. Be8 Kg7 24. Rg1 Bg3 25. Rf1 Bf2 26. d5 Kf6 27. d6 Ke5 28. Bf7 b5 29. d7 Bb6 30. Rf5 Ke4 31. Rxb5 Kf3 32. c4 Kf2 33. d8=Q Kg2 34. c5 Kg3 35. Qf6 Kh2 36. c6 Kg2 37. c7 Kg1 38. Qf2 Kg2 39. Kg1 Kh2 40. c8=Q Kg2 41. Bd5 Kf1 42. Kg2 a5 43. Qc1 Kg1 44. Kf1 Kg2 45. h4 Kg1 46. Ke2 Kf1 47. Qd2 a4 48. Kf3 - Oct 16 18:37 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Kg1 46. Ke2 Kf1 47. Qd2 a4
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Bb4 6. c3 h5 7. Bb5 Nc6 8. Ne5 Nh6 9. h3 fxe5 10. Bg5 O-O 11. f4 Rf6 12. f5 Qf8 13. Qf3 Kh8 14. fxe6 Qf4 15. Bf6 gxf6 16. Qxf4 d5 17. O-O Bf5 18. g4 Nxg4 19. Rf6 Rg8 20. Rg6 Rxg6 21. exd5 Bd6 22. Kh1 a6 23. Be8 Kg7 24. Rg1 Bg3 25. Rf1 Bf2 26. d5 Kf6 27. d6 Ke5 28. Bf7 b5 29. d7 Bb6 30. Rf5 Ke4 31. Rxb5 Kf3 32. c4 Kf2 33. d8=Q Kg2 34. c5 Kg3 35. Qf6 Kh2 36. c6 Kg2 37. c7 Kg1 38. Qf2 Kg2 39. Kg1 Kh2 40. c8=Q Kg2 41. Bd5 Kf1 42. Kg2 a5 43. Qc1 Kg1 44. Kf1 Kg2 45. h4 Kg1 46. Ke2 Kf1 47. Qd2 a4