78.9M
positions
15.1M
practically solved
284.37T
engine nodes
2.2M
analyses
7,123
in queue
15
active workers
74
active cores
25.2M
nodes / sec
33.5
positions / min
82
proof number
4,106
disproof number
Root conquest: 0/20 first moves solved · 19.2% of tree positions solved · last 24h: 401,729 closures, 5.98T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 69 over 218 open obligations, of which 41 (18.8%) 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 16.1m (median of 11) · measured at 2026-10-08 13:00 UTC
Closures by source, last 24h (401729 of 401729 labelled): USER 96.6% (388050) · FILL 0.4% (1651) · AUTO 3.0% (11927) · SOLVE 0.0% (0) · NONE 0.0% (101) · last 7d (1869543 of 1869543): USER 99.0% (1851371) · FILL 0.1% (2071) · AUTO 0.6% (11952) · SOLVE 0.0% (0) · NONE 0.2% (4149). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. d4 Nh6 2. f3 d5 3. Nh3 Ng4 4. c4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nh3 d5 2. Nc3 h6 … Rad8 14. g4 exd4 15. Bb5 Re4 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#1
- 1. d4 Nh6 2. f3 d5 3. Nh3 Ng4 4. fxg4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. d4 Nh6 2. f3 d5 3. Nh3 Ng4 4. a4 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … Be1 19. axb5 Ra5 20. Kh1 Ra4 (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 | 1063 | 2 | |
| g1h3 | unsolved | 820 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 403 | 2 | |
| e2e4 | unsolved | 403 | 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 49.3% of the fleet | 2.95T | 22,453 |
| 2 | BManBJ 25.6% of the fleet | 1.53T | 11,019 |
| 3 | randomchampgamer 11.1% of the fleet | 664.73B | 5,025 |
| 4 | RickEdinson 7.4% of the fleet | 441.32B | 3,121 |
| 5 | tenzink 4.1% of the fleet | 242.61B | 1,740 |
| 6 | MoNiKaMaDnEsS 2.5% of the fleet | 150.96B | 1,388 |
| 7 | soothdest <0.1% of the fleet | 2.73B | 31 |
| 8 | NeoArcturus <0.1% of the fleet | 546.0M | 5 |
8 accounts · 5.98T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 31.7% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.0% of the fleet | 42.83T | 349,427 |
| 3 | BManBJ 14.9% of the fleet | 42.37T | 297,315 |
| 4 | auranvesdranor 11.0% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 5.6% of the fleet | 15.97T | 117,342 |
| 6 | RickEdinson 3.7% of the fleet | 10.62T | 70,982 |
| 7 | JackIV 3.5% of the fleet | 10.06T | 67,859 |
| 8 | gannet 2.5% of the fleet | 7.24T | 46,848 |
| 9 | Torom 2.5% of the fleet | 7.14T | 54,156 |
| 10 | MoNiKaMaDnEsS 2.1% of the fleet | 6.11T | 41,332 |
and 25 more.
35 accounts · 284.64T 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 21 proposals · see every proposal
Milestones
- Oct 08 13:57 Solved: WHITE_WIN via MATE_PVview
1. Nc3 f6 2. e4 c6 … b3 20. axb3 Nd4 21. h6 Nc2
1. Nc3 f6 2. e4 c6 3. Nf3 d5 4. g4 Nh6 5. d4 e5 6. Nb5 Bb4 7. c3 O-O 8. Nh4 exd4 9. f4 Ba3 10. Ng6 hxg6 11. bxa3 cxb5 12. Ba3 Re8 13. Qa4 Qa5 14. Qxa5 b5 15. Be7 b4 16. h4 Nc6 17. h5 dxe4 18. Rd1 Ba6 19. Bb5 b3 20. axb3 Nd4 21. h6 Nc2 - Oct 08 13:57 Solved: WHITE_WIN via MATE_PVview
1. Nc3 f6 2. e4 c6 … b3 20. axb3 Nd4 21. h6 f5
1. Nc3 f6 2. e4 c6 3. Nf3 d5 4. g4 Nh6 5. d4 e5 6. Nb5 Bb4 7. c3 O-O 8. Nh4 exd4 9. f4 Ba3 10. Ng6 hxg6 11. bxa3 cxb5 12. Ba3 Re8 13. Qa4 Qa5 14. Qxa5 b5 15. Be7 b4 16. h4 Nc6 17. h5 dxe4 18. Rd1 Ba6 19. Bb5 b3 20. axb3 Nd4 21. h6 f5 - Oct 08 13:57 Solved: WHITE_WIN via MATE_PVview
1. Nc3 f6 2. e4 c6 … Nd4 21. h6 gxh6 22. Rh8 Kg7
1. Nc3 f6 2. e4 c6 3. Nf3 d5 4. g4 Nh6 5. d4 e5 6. Nb5 Bb4 7. c3 O-O 8. Nh4 exd4 9. f4 Ba3 10. Ng6 hxg6 11. bxa3 cxb5 12. Ba3 Re8 13. Qa4 Qa5 14. Qxa5 b5 15. Be7 b4 16. h4 Nc6 17. h5 dxe4 18. Rd1 Ba6 19. Bb5 b3 20. axb3 Nd4 21. h6 gxh6 22. Rh8 Kg7 - Oct 08 13:57 Solved: WHITE_WIN via MATE_PVview
1. Nc3 f6 2. e4 c6 … 20. axb3 Nd4 21. h6 gxh6 22. Rh8
1. Nc3 f6 2. e4 c6 3. Nf3 d5 4. g4 Nh6 5. d4 e5 6. Nb5 Bb4 7. c3 O-O 8. Nh4 exd4 9. f4 Ba3 10. Ng6 hxg6 11. bxa3 cxb5 12. Ba3 Re8 13. Qa4 Qa5 14. Qxa5 b5 15. Be7 b4 16. h4 Nc6 17. h5 dxe4 18. Rd1 Ba6 19. Bb5 b3 20. axb3 Nd4 21. h6 gxh6 22. Rh8 - Oct 08 13:57 Solved: WHITE_WIN via MATE_PVview
1. Nc3 f6 2. e4 c6 … b3 20. axb3 Nd4 21. h6 gxh6
1. Nc3 f6 2. e4 c6 3. Nf3 d5 4. g4 Nh6 5. d4 e5 6. Nb5 Bb4 7. c3 O-O 8. Nh4 exd4 9. f4 Ba3 10. Ng6 hxg6 11. bxa3 cxb5 12. Ba3 Re8 13. Qa4 Qa5 14. Qxa5 b5 15. Be7 b4 16. h4 Nc6 17. h5 dxe4 18. Rd1 Ba6 19. Bb5 b3 20. axb3 Nd4 21. h6 gxh6 - Oct 08 13:57 Solved: WHITE_WIN via MATE_PVview
1. Nc3 f6 2. e4 c6 … Bxg6 32. Rd8 Re8 33. Rg1 a6
1. Nc3 f6 2. e4 c6 3. Nf3 d5 4. g4 Nh6 5. d4 e5 6. Nb5 Bb4 7. c3 O-O 8. Nh4 exd4 9. f4 Ba3 10. Ng6 hxg6 11. bxa3 cxb5 12. Ba3 Re8 13. Qa4 Qa5 14. Qxa5 b5 15. Be7 b4 16. h4 Nc6 17. h5 dxe4 18. Rd1 Ba6 19. Bb5 b3 20. axb3 Nd4 21. h6 g5 22. h7 Kh8 23. O-O Nf3 24. Kh1 Rf8 25. fxg5 Ng5 26. Bxf6 Bb7 27. Bc6 Bc8 28. g5 Bf5 29. Bxa8 Be4 30. Kh2 Bf5 31. g6 Bxg6 32. Rd8 Re8 33. Rg1 a6 - Oct 08 13:57 Solved: WHITE_WIN via MATE_PVview
1. Nc3 f6 2. e4 c6 … 31. g6 Bxg6 32. Rd8 Re8 33. Rg1
1. Nc3 f6 2. e4 c6 3. Nf3 d5 4. g4 Nh6 5. d4 e5 6. Nb5 Bb4 7. c3 O-O 8. Nh4 exd4 9. f4 Ba3 10. Ng6 hxg6 11. bxa3 cxb5 12. Ba3 Re8 13. Qa4 Qa5 14. Qxa5 b5 15. Be7 b4 16. h4 Nc6 17. h5 dxe4 18. Rd1 Ba6 19. Bb5 b3 20. axb3 Nd4 21. h6 g5 22. h7 Kh8 23. O-O Nf3 24. Kh1 Rf8 25. fxg5 Ng5 26. Bxf6 Bb7 27. Bc6 Bc8 28. g5 Bf5 29. Bxa8 Be4 30. Kh2 Bf5 31. g6 Bxg6 32. Rd8 Re8 33. Rg1 - Oct 08 13:57 Solved: WHITE_WIN via MATE_PVview
1. Nc3 f6 2. e4 c6 … Bf5 31. g6 Bxg6 32. Rd8 Re8
1. Nc3 f6 2. e4 c6 3. Nf3 d5 4. g4 Nh6 5. d4 e5 6. Nb5 Bb4 7. c3 O-O 8. Nh4 exd4 9. f4 Ba3 10. Ng6 hxg6 11. bxa3 cxb5 12. Ba3 Re8 13. Qa4 Qa5 14. Qxa5 b5 15. Be7 b4 16. h4 Nc6 17. h5 dxe4 18. Rd1 Ba6 19. Bb5 b3 20. axb3 Nd4 21. h6 g5 22. h7 Kh8 23. O-O Nf3 24. Kh1 Rf8 25. fxg5 Ng5 26. Bxf6 Bb7 27. Bc6 Bc8 28. g5 Bf5 29. Bxa8 Be4 30. Kh2 Bf5 31. g6 Bxg6 32. Rd8 Re8 - Oct 08 13:57 Solved: WHITE_WIN via MATE_PVview
1. Nc3 f6 2. e4 c6 … 30. Kh2 Bf5 31. g6 Bxg6 32. Rd8
1. Nc3 f6 2. e4 c6 3. Nf3 d5 4. g4 Nh6 5. d4 e5 6. Nb5 Bb4 7. c3 O-O 8. Nh4 exd4 9. f4 Ba3 10. Ng6 hxg6 11. bxa3 cxb5 12. Ba3 Re8 13. Qa4 Qa5 14. Qxa5 b5 15. Be7 b4 16. h4 Nc6 17. h5 dxe4 18. Rd1 Ba6 19. Bb5 b3 20. axb3 Nd4 21. h6 g5 22. h7 Kh8 23. O-O Nf3 24. Kh1 Rf8 25. fxg5 Ng5 26. Bxf6 Bb7 27. Bc6 Bc8 28. g5 Bf5 29. Bxa8 Be4 30. Kh2 Bf5 31. g6 Bxg6 32. Rd8 - Oct 08 13:57 Solved: WHITE_WIN via MATE_PVview
1. Nc3 f6 2. e4 c6 … Be4 30. Kh2 Bf5 31. g6 Bxg6
1. Nc3 f6 2. e4 c6 3. Nf3 d5 4. g4 Nh6 5. d4 e5 6. Nb5 Bb4 7. c3 O-O 8. Nh4 exd4 9. f4 Ba3 10. Ng6 hxg6 11. bxa3 cxb5 12. Ba3 Re8 13. Qa4 Qa5 14. Qxa5 b5 15. Be7 b4 16. h4 Nc6 17. h5 dxe4 18. Rd1 Ba6 19. Bb5 b3 20. axb3 Nd4 21. h6 g5 22. h7 Kh8 23. O-O Nf3 24. Kh1 Rf8 25. fxg5 Ng5 26. Bxf6 Bb7 27. Bc6 Bc8 28. g5 Bf5 29. Bxa8 Be4 30. Kh2 Bf5 31. g6 Bxg6 - Oct 08 13:57 Solved: WHITE_WIN via MATE_PVview
1. Nc3 f6 2. e4 c6 … 29. Bxa8 Be4 30. Kh2 Bf5 31. g6
1. Nc3 f6 2. e4 c6 3. Nf3 d5 4. g4 Nh6 5. d4 e5 6. Nb5 Bb4 7. c3 O-O 8. Nh4 exd4 9. f4 Ba3 10. Ng6 hxg6 11. bxa3 cxb5 12. Ba3 Re8 13. Qa4 Qa5 14. Qxa5 b5 15. Be7 b4 16. h4 Nc6 17. h5 dxe4 18. Rd1 Ba6 19. Bb5 b3 20. axb3 Nd4 21. h6 g5 22. h7 Kh8 23. O-O Nf3 24. Kh1 Rf8 25. fxg5 Ng5 26. Bxf6 Bb7 27. Bc6 Bc8 28. g5 Bf5 29. Bxa8 Be4 30. Kh2 Bf5 31. g6 - Oct 08 13:57 Solved: WHITE_WIN via MATE_PVview
1. Nc3 f6 2. e4 c6 … Bf5 29. Bxa8 Be4 30. Kh2 Bf5
1. Nc3 f6 2. e4 c6 3. Nf3 d5 4. g4 Nh6 5. d4 e5 6. Nb5 Bb4 7. c3 O-O 8. Nh4 exd4 9. f4 Ba3 10. Ng6 hxg6 11. bxa3 cxb5 12. Ba3 Re8 13. Qa4 Qa5 14. Qxa5 b5 15. Be7 b4 16. h4 Nc6 17. h5 dxe4 18. Rd1 Ba6 19. Bb5 b3 20. axb3 Nd4 21. h6 g5 22. h7 Kh8 23. O-O Nf3 24. Kh1 Rf8 25. fxg5 Ng5 26. Bxf6 Bb7 27. Bc6 Bc8 28. g5 Bf5 29. Bxa8 Be4 30. Kh2 Bf5