104.1M
positions
22.1M
practically solved
384.34T
engine nodes
2.9M
analyses
0
in queue
active workers
36
active cores
26.0M
nodes / sec
5.0
positions / min
107
proof number
4,824
disproof number
Root conquest: 0/20 first moves solved · 21.3% of tree positions solved · last 24h: 154,237 closures, 2.28T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 over 202 open obligations, of which 37 (18.3%) 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 2.9m (median of 133) · measured at 2026-10-31 15:00 UTC
Closures by source, last 24h (154237 of 154237 labelled): USER 99.9% (154011) · FILL 0.1% (179) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.0% (47) · last 7d (1329163 of 1329163): USER 98.0% (1302561) · FILL 0.7% (9817) · AUTO 1.2% (16257) · SOLVE 0.0% (0) · NONE 0.0% (528). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing all workers
- 1. e4 d6 2. Nh3 f5 … Ba4 13. Qb7 Ng4 14. f3 Rb8 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#0
- 1. e4 d6 2. Nh3 f5 … Ba4 13. Qb7 Ng4 14. f3 Rc8 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#1
- deep line, ply ≥39 · … a4 e5 b4 Rh7 (Fill) · 2.00B nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. e4 e6 … Kh8 16. Bg5 Bd7 17. Bxc6 Qd7 (Fill) · 2.00B nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nh3 e6 2. e3 g6 … O-O-O 11. Bd2 Ne7 12. Bb4 Nc6 (Fill) · 2.00B 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 | 1110 | 2 | |
| g1h3 | unsolved | 820 | 2 | |
| e2e3 | unsolved | 469 | 3 | |
| e2e4 | unsolved | 410 | 2 | |
| d2d4 | unsolved | 405 | 2 | |
| b1c3 | unsolved | 142 | 2 | |
| b1a3 | unsolved | 0 | 3 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b2b4 | unsolved | -59 | 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 71.1% of the fleet | 1.62T | 6,684 |
| 2 | RickEdinson 17.9% of the fleet | 407.68B | 2,483 |
| 3 | MoNiKaMaDnEsS 10.6% of the fleet | 241.46B | 1,856 |
| 4 | soothdest 0.4% of the fleet | 9.70B | 63 |
4 accounts · 2.28T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 23.5% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 20.3% of the fleet | 77.99T | 528,324 |
| 3 | Torom 13.1% of the fleet | 50.55T | 363,522 |
| 4 | tenzink 11.1% of the fleet | 42.83T | 349,427 |
| 5 | auranvesdranor 8.2% of the fleet | 31.40T | 228,002 |
| 6 | RickEdinson 5.5% of the fleet | 21.06T | 138,018 |
| 7 | randomchampgamer 5.2% of the fleet | 19.85T | 140,897 |
| 8 | MoNiKaMaDnEsS 3.2% of the fleet | 12.44T | 86,159 |
| 9 | JackIV 2.6% of the fleet | 10.06T | 67,859 |
| 10 | gannet 1.9% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 384.41T 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 31 15:53 Solved: WHITE_WIN via MATE_PVview
1. Nh3 e6 2. e3 g6 … Ke7 32. Re8 Kf7 33. Rf8 Kg7
1. Nh3 e6 2. e3 g6 3. Bb5 c6 4. Qh5 h6 5. Nc3 Bb4 6. Qe5 Qf6 7. g3 Qf4 8. f3 Qxe5 9. O-O a5 10. Ba6 bxa6 11. Nb5 Kf8 12. c3 Na6 13. Nc7 Rb8 14. d3 f6 15. b3 g5 16. Ba3 Bxa3 17. Nf2 a4 18. Rab1 axb3 19. h4 Rb2 20. Rxb2 h5 21. Kh1 Nc5 22. Rg1 e5 23. e4 Na4 24. f4 g4 25. Nxg4 Nh6 26. g4 Nf7 27. gxh5 Ke7 28. Rg7 Kd8 29. Ne6 dxe6 30. Rd7 Ke8 31. Rd8 Ke7 32. Re8 Kf7 33. Rf8 Kg7 - Oct 31 15:53 Solved: WHITE_WIN via MATE_PVview
1. Nh3 e6 2. e3 g6 … 31. Rd8 Ke7 32. Re8 Kf7 33. Rf8
1. Nh3 e6 2. e3 g6 3. Bb5 c6 4. Qh5 h6 5. Nc3 Bb4 6. Qe5 Qf6 7. g3 Qf4 8. f3 Qxe5 9. O-O a5 10. Ba6 bxa6 11. Nb5 Kf8 12. c3 Na6 13. Nc7 Rb8 14. d3 f6 15. b3 g5 16. Ba3 Bxa3 17. Nf2 a4 18. Rab1 axb3 19. h4 Rb2 20. Rxb2 h5 21. Kh1 Nc5 22. Rg1 e5 23. e4 Na4 24. f4 g4 25. Nxg4 Nh6 26. g4 Nf7 27. gxh5 Ke7 28. Rg7 Kd8 29. Ne6 dxe6 30. Rd7 Ke8 31. Rd8 Ke7 32. Re8 Kf7 33. Rf8 - Oct 31 15:53 Solved: WHITE_WIN via MATE_PVview
1. Nh3 e6 2. e3 g6 … Ke8 31. Rd8 Ke7 32. Re8 Kf7
1. Nh3 e6 2. e3 g6 3. Bb5 c6 4. Qh5 h6 5. Nc3 Bb4 6. Qe5 Qf6 7. g3 Qf4 8. f3 Qxe5 9. O-O a5 10. Ba6 bxa6 11. Nb5 Kf8 12. c3 Na6 13. Nc7 Rb8 14. d3 f6 15. b3 g5 16. Ba3 Bxa3 17. Nf2 a4 18. Rab1 axb3 19. h4 Rb2 20. Rxb2 h5 21. Kh1 Nc5 22. Rg1 e5 23. e4 Na4 24. f4 g4 25. Nxg4 Nh6 26. g4 Nf7 27. gxh5 Ke7 28. Rg7 Kd8 29. Ne6 dxe6 30. Rd7 Ke8 31. Rd8 Ke7 32. Re8 Kf7 - Oct 31 15:53 Solved: WHITE_WIN via MATE_PVview
1. Nh3 e6 2. e3 g6 … 30. Rd7 Ke8 31. Rd8 Ke7 32. Re8
1. Nh3 e6 2. e3 g6 3. Bb5 c6 4. Qh5 h6 5. Nc3 Bb4 6. Qe5 Qf6 7. g3 Qf4 8. f3 Qxe5 9. O-O a5 10. Ba6 bxa6 11. Nb5 Kf8 12. c3 Na6 13. Nc7 Rb8 14. d3 f6 15. b3 g5 16. Ba3 Bxa3 17. Nf2 a4 18. Rab1 axb3 19. h4 Rb2 20. Rxb2 h5 21. Kh1 Nc5 22. Rg1 e5 23. e4 Na4 24. f4 g4 25. Nxg4 Nh6 26. g4 Nf7 27. gxh5 Ke7 28. Rg7 Kd8 29. Ne6 dxe6 30. Rd7 Ke8 31. Rd8 Ke7 32. Re8 - Oct 31 15:53 Solved: WHITE_WIN via MATE_PVview
1. Nh3 e6 2. e3 g6 … dxe6 30. Rd7 Ke8 31. Rd8 Ke7
1. Nh3 e6 2. e3 g6 3. Bb5 c6 4. Qh5 h6 5. Nc3 Bb4 6. Qe5 Qf6 7. g3 Qf4 8. f3 Qxe5 9. O-O a5 10. Ba6 bxa6 11. Nb5 Kf8 12. c3 Na6 13. Nc7 Rb8 14. d3 f6 15. b3 g5 16. Ba3 Bxa3 17. Nf2 a4 18. Rab1 axb3 19. h4 Rb2 20. Rxb2 h5 21. Kh1 Nc5 22. Rg1 e5 23. e4 Na4 24. f4 g4 25. Nxg4 Nh6 26. g4 Nf7 27. gxh5 Ke7 28. Rg7 Kd8 29. Ne6 dxe6 30. Rd7 Ke8 31. Rd8 Ke7 - Oct 31 15:53 Solved: WHITE_WIN via MATE_PVview
1. Nh3 e6 2. e3 g6 … 29. Ne6 dxe6 30. Rd7 Ke8 31. Rd8
1. Nh3 e6 2. e3 g6 3. Bb5 c6 4. Qh5 h6 5. Nc3 Bb4 6. Qe5 Qf6 7. g3 Qf4 8. f3 Qxe5 9. O-O a5 10. Ba6 bxa6 11. Nb5 Kf8 12. c3 Na6 13. Nc7 Rb8 14. d3 f6 15. b3 g5 16. Ba3 Bxa3 17. Nf2 a4 18. Rab1 axb3 19. h4 Rb2 20. Rxb2 h5 21. Kh1 Nc5 22. Rg1 e5 23. e4 Na4 24. f4 g4 25. Nxg4 Nh6 26. g4 Nf7 27. gxh5 Ke7 28. Rg7 Kd8 29. Ne6 dxe6 30. Rd7 Ke8 31. Rd8 - Oct 31 15:53 Solved: WHITE_WIN via MATE_PVview
1. Nh3 e6 2. e3 g6 … Kd8 29. Ne6 dxe6 30. Rd7 Ke8
1. Nh3 e6 2. e3 g6 3. Bb5 c6 4. Qh5 h6 5. Nc3 Bb4 6. Qe5 Qf6 7. g3 Qf4 8. f3 Qxe5 9. O-O a5 10. Ba6 bxa6 11. Nb5 Kf8 12. c3 Na6 13. Nc7 Rb8 14. d3 f6 15. b3 g5 16. Ba3 Bxa3 17. Nf2 a4 18. Rab1 axb3 19. h4 Rb2 20. Rxb2 h5 21. Kh1 Nc5 22. Rg1 e5 23. e4 Na4 24. f4 g4 25. Nxg4 Nh6 26. g4 Nf7 27. gxh5 Ke7 28. Rg7 Kd8 29. Ne6 dxe6 30. Rd7 Ke8 - Oct 31 15:53 Solved: WHITE_WIN via MATE_PVview
1. Nh3 e6 2. e3 g6 … 28. Rg7 Kd8 29. Ne6 dxe6 30. Rd7
1. Nh3 e6 2. e3 g6 3. Bb5 c6 4. Qh5 h6 5. Nc3 Bb4 6. Qe5 Qf6 7. g3 Qf4 8. f3 Qxe5 9. O-O a5 10. Ba6 bxa6 11. Nb5 Kf8 12. c3 Na6 13. Nc7 Rb8 14. d3 f6 15. b3 g5 16. Ba3 Bxa3 17. Nf2 a4 18. Rab1 axb3 19. h4 Rb2 20. Rxb2 h5 21. Kh1 Nc5 22. Rg1 e5 23. e4 Na4 24. f4 g4 25. Nxg4 Nh6 26. g4 Nf7 27. gxh5 Ke7 28. Rg7 Kd8 29. Ne6 dxe6 30. Rd7 - Oct 31 15:53 Solved: WHITE_WIN via MATE_PVview
1. Nh3 e6 2. e3 g6 … Ke7 28. Rg7 Kd8 29. Ne6 dxe6
1. Nh3 e6 2. e3 g6 3. Bb5 c6 4. Qh5 h6 5. Nc3 Bb4 6. Qe5 Qf6 7. g3 Qf4 8. f3 Qxe5 9. O-O a5 10. Ba6 bxa6 11. Nb5 Kf8 12. c3 Na6 13. Nc7 Rb8 14. d3 f6 15. b3 g5 16. Ba3 Bxa3 17. Nf2 a4 18. Rab1 axb3 19. h4 Rb2 20. Rxb2 h5 21. Kh1 Nc5 22. Rg1 e5 23. e4 Na4 24. f4 g4 25. Nxg4 Nh6 26. g4 Nf7 27. gxh5 Ke7 28. Rg7 Kd8 29. Ne6 dxe6 - Oct 31 15:53 Solved: WHITE_WIN via MATE_PVview
1. Nh3 e6 2. e3 g6 … 27. gxh5 Ke7 28. Rg7 Kd8 29. Ne6
1. Nh3 e6 2. e3 g6 3. Bb5 c6 4. Qh5 h6 5. Nc3 Bb4 6. Qe5 Qf6 7. g3 Qf4 8. f3 Qxe5 9. O-O a5 10. Ba6 bxa6 11. Nb5 Kf8 12. c3 Na6 13. Nc7 Rb8 14. d3 f6 15. b3 g5 16. Ba3 Bxa3 17. Nf2 a4 18. Rab1 axb3 19. h4 Rb2 20. Rxb2 h5 21. Kh1 Nc5 22. Rg1 e5 23. e4 Na4 24. f4 g4 25. Nxg4 Nh6 26. g4 Nf7 27. gxh5 Ke7 28. Rg7 Kd8 29. Ne6 - Oct 31 15:53 Solved: WHITE_WIN via MATE_PVview
1. Nh3 e6 2. e3 g6 … Nf7 27. gxh5 Ke7 28. Rg7 Kd8
1. Nh3 e6 2. e3 g6 3. Bb5 c6 4. Qh5 h6 5. Nc3 Bb4 6. Qe5 Qf6 7. g3 Qf4 8. f3 Qxe5 9. O-O a5 10. Ba6 bxa6 11. Nb5 Kf8 12. c3 Na6 13. Nc7 Rb8 14. d3 f6 15. b3 g5 16. Ba3 Bxa3 17. Nf2 a4 18. Rab1 axb3 19. h4 Rb2 20. Rxb2 h5 21. Kh1 Nc5 22. Rg1 e5 23. e4 Na4 24. f4 g4 25. Nxg4 Nh6 26. g4 Nf7 27. gxh5 Ke7 28. Rg7 Kd8 - Oct 31 15:53 Solved: WHITE_WIN via MATE_PVview
1. Nh3 e6 2. e3 g6 … 26. g4 Nf7 27. gxh5 Ke7 28. Rg7
1. Nh3 e6 2. e3 g6 3. Bb5 c6 4. Qh5 h6 5. Nc3 Bb4 6. Qe5 Qf6 7. g3 Qf4 8. f3 Qxe5 9. O-O a5 10. Ba6 bxa6 11. Nb5 Kf8 12. c3 Na6 13. Nc7 Rb8 14. d3 f6 15. b3 g5 16. Ba3 Bxa3 17. Nf2 a4 18. Rab1 axb3 19. h4 Rb2 20. Rxb2 h5 21. Kh1 Nc5 22. Rg1 e5 23. e4 Na4 24. f4 g4 25. Nxg4 Nh6 26. g4 Nf7 27. gxh5 Ke7 28. Rg7