104.2M
positions
22.2M
practically solved
384.77T
engine nodes
2.9M
analyses
248
in queue
active workers
28
active cores
23.3M
nodes / sec
4.9
positions / min
107
proof number
4,824
disproof number
Root conquest: 0/20 first moves solved · 21.3% of tree positions solved · last 24h: 119,007 closures, 2.25T 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 4.2m (median of 56) · measured at 2026-10-31 19:00 UTC
Closures by source, last 24h (119007 of 119007 labelled): USER 99.6% (118568) · FILL 0.3% (410) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.0% (29) · last 7d (1266484 of 1266484): USER 97.9% (1239663) · FILL 0.8% (10048) · AUTO 1.3% (16257) · SOLVE 0.0% (0) · NONE 0.0% (516). 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. Nf3 d6 2. Ng5 f5 … Kf7 16. Bd2 Kg7 17. O-O Bd7 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#0
- 1. Nf3 d6 2. Ng5 f5 … Kf7 16. Bd2 Kg7 17. O-O b4 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … Kf7 16. Bd2 Kg7 17. O-O f4 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 d6 2. Ng5 f5 … Kf7 16. Bd2 Kg7 17. O-O Kh8 (User) · 512.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. e4 d5 … 17. f3 Nb6 18. c4 Na4 19. Qd2 (User) · 128.0M 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 | 1159 | 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 72.0% of the fleet | 1.62T | 6,653 |
| 2 | RickEdinson 18.4% of the fleet | 413.69B | 2,645 |
| 3 | MoNiKaMaDnEsS 9.2% of the fleet | 205.60B | 1,355 |
| 4 | soothdest 0.4% of the fleet | 9.70B | 63 |
4 accounts · 2.25T 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 | 78.26T | 529,336 |
| 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 | 21.13T | 138,435 |
| 7 | randomchampgamer 5.2% of the fleet | 19.85T | 140,897 |
| 8 | MoNiKaMaDnEsS 3.3% of the fleet | 12.51T | 86,478 |
| 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 · 384.82T 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 19:42 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … Kf7 16. Bd2 Kg7 17. O-O Be7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 e6 6. Bxc6 h5 7. d4 g5 8. c4 Na6 9. Qa4 b5 10. Qa5 Nc7 11. c5 Rb8 12. Nc3 Rb6 13. cxd6 Bb4 14. Nxh8 Bf8 15. e5 Kf7 16. Bd2 Kg7 17. O-O Be7 - Oct 31 19:42 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Kf7 34. e8=R Kg6 35. Re6 Kh5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 e6 6. Bxc6 h5 7. d4 g5 8. c4 Na6 9. Qa4 b5 10. Qa5 Nc7 11. c5 Rb8 12. Nc3 Rb6 13. cxd6 Bb4 14. Nxh8 Bf8 15. e5 Kf7 16. Bd2 Kg7 17. O-O Be7 18. Rac1 h4 19. Nd5 exd5 20. Rc6 Bd7 21. Rg6 Kh8 22. Rg8 Kh7 23. Rg7 Kh8 24. Rh7 Kg8 25. Rxe7 Re6 26. Rc1 h3 27. gxh3 a6 28. Qd8 Re8 29. Qe7 Rxe7 30. Rc8 Kg7 31. e6 g4 32. Rc7 Kf8 33. e7 Kf7 34. e8=R Kg6 35. Re6 Kh5 - Oct 31 19:42 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 33. e7 Kf7 34. e8=R Kg6 35. Re6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 e6 6. Bxc6 h5 7. d4 g5 8. c4 Na6 9. Qa4 b5 10. Qa5 Nc7 11. c5 Rb8 12. Nc3 Rb6 13. cxd6 Bb4 14. Nxh8 Bf8 15. e5 Kf7 16. Bd2 Kg7 17. O-O Be7 18. Rac1 h4 19. Nd5 exd5 20. Rc6 Bd7 21. Rg6 Kh8 22. Rg8 Kh7 23. Rg7 Kh8 24. Rh7 Kg8 25. Rxe7 Re6 26. Rc1 h3 27. gxh3 a6 28. Qd8 Re8 29. Qe7 Rxe7 30. Rc8 Kg7 31. e6 g4 32. Rc7 Kf8 33. e7 Kf7 34. e8=R Kg6 35. Re6 - Oct 31 19:42 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Kf8 33. e7 Kf7 34. e8=R Kg6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 e6 6. Bxc6 h5 7. d4 g5 8. c4 Na6 9. Qa4 b5 10. Qa5 Nc7 11. c5 Rb8 12. Nc3 Rb6 13. cxd6 Bb4 14. Nxh8 Bf8 15. e5 Kf7 16. Bd2 Kg7 17. O-O Be7 18. Rac1 h4 19. Nd5 exd5 20. Rc6 Bd7 21. Rg6 Kh8 22. Rg8 Kh7 23. Rg7 Kh8 24. Rh7 Kg8 25. Rxe7 Re6 26. Rc1 h3 27. gxh3 a6 28. Qd8 Re8 29. Qe7 Rxe7 30. Rc8 Kg7 31. e6 g4 32. Rc7 Kf8 33. e7 Kf7 34. e8=R Kg6 - Oct 31 19:42 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 32. Rc7 Kf8 33. e7 Kf7 34. e8=R
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 e6 6. Bxc6 h5 7. d4 g5 8. c4 Na6 9. Qa4 b5 10. Qa5 Nc7 11. c5 Rb8 12. Nc3 Rb6 13. cxd6 Bb4 14. Nxh8 Bf8 15. e5 Kf7 16. Bd2 Kg7 17. O-O Be7 18. Rac1 h4 19. Nd5 exd5 20. Rc6 Bd7 21. Rg6 Kh8 22. Rg8 Kh7 23. Rg7 Kh8 24. Rh7 Kg8 25. Rxe7 Re6 26. Rc1 h3 27. gxh3 a6 28. Qd8 Re8 29. Qe7 Rxe7 30. Rc8 Kg7 31. e6 g4 32. Rc7 Kf8 33. e7 Kf7 34. e8=R - Oct 31 19:42 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … g4 32. Rc7 Kf8 33. e7 Kf7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 e6 6. Bxc6 h5 7. d4 g5 8. c4 Na6 9. Qa4 b5 10. Qa5 Nc7 11. c5 Rb8 12. Nc3 Rb6 13. cxd6 Bb4 14. Nxh8 Bf8 15. e5 Kf7 16. Bd2 Kg7 17. O-O Be7 18. Rac1 h4 19. Nd5 exd5 20. Rc6 Bd7 21. Rg6 Kh8 22. Rg8 Kh7 23. Rg7 Kh8 24. Rh7 Kg8 25. Rxe7 Re6 26. Rc1 h3 27. gxh3 a6 28. Qd8 Re8 29. Qe7 Rxe7 30. Rc8 Kg7 31. e6 g4 32. Rc7 Kf8 33. e7 Kf7 - Oct 31 19:42 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 31. e6 g4 32. Rc7 Kf8 33. e7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 e6 6. Bxc6 h5 7. d4 g5 8. c4 Na6 9. Qa4 b5 10. Qa5 Nc7 11. c5 Rb8 12. Nc3 Rb6 13. cxd6 Bb4 14. Nxh8 Bf8 15. e5 Kf7 16. Bd2 Kg7 17. O-O Be7 18. Rac1 h4 19. Nd5 exd5 20. Rc6 Bd7 21. Rg6 Kh8 22. Rg8 Kh7 23. Rg7 Kh8 24. Rh7 Kg8 25. Rxe7 Re6 26. Rc1 h3 27. gxh3 a6 28. Qd8 Re8 29. Qe7 Rxe7 30. Rc8 Kg7 31. e6 g4 32. Rc7 Kf8 33. e7 - Oct 31 19:42 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Kg7 31. e6 g4 32. Rc7 Kf8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 e6 6. Bxc6 h5 7. d4 g5 8. c4 Na6 9. Qa4 b5 10. Qa5 Nc7 11. c5 Rb8 12. Nc3 Rb6 13. cxd6 Bb4 14. Nxh8 Bf8 15. e5 Kf7 16. Bd2 Kg7 17. O-O Be7 18. Rac1 h4 19. Nd5 exd5 20. Rc6 Bd7 21. Rg6 Kh8 22. Rg8 Kh7 23. Rg7 Kh8 24. Rh7 Kg8 25. Rxe7 Re6 26. Rc1 h3 27. gxh3 a6 28. Qd8 Re8 29. Qe7 Rxe7 30. Rc8 Kg7 31. e6 g4 32. Rc7 Kf8 - Oct 31 19:42 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 30. Rc8 Kg7 31. e6 g4 32. Rc7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 e6 6. Bxc6 h5 7. d4 g5 8. c4 Na6 9. Qa4 b5 10. Qa5 Nc7 11. c5 Rb8 12. Nc3 Rb6 13. cxd6 Bb4 14. Nxh8 Bf8 15. e5 Kf7 16. Bd2 Kg7 17. O-O Be7 18. Rac1 h4 19. Nd5 exd5 20. Rc6 Bd7 21. Rg6 Kh8 22. Rg8 Kh7 23. Rg7 Kh8 24. Rh7 Kg8 25. Rxe7 Re6 26. Rc1 h3 27. gxh3 a6 28. Qd8 Re8 29. Qe7 Rxe7 30. Rc8 Kg7 31. e6 g4 32. Rc7 - Oct 31 19:42 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Rxe7 30. Rc8 Kg7 31. e6 g4
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 e6 6. Bxc6 h5 7. d4 g5 8. c4 Na6 9. Qa4 b5 10. Qa5 Nc7 11. c5 Rb8 12. Nc3 Rb6 13. cxd6 Bb4 14. Nxh8 Bf8 15. e5 Kf7 16. Bd2 Kg7 17. O-O Be7 18. Rac1 h4 19. Nd5 exd5 20. Rc6 Bd7 21. Rg6 Kh8 22. Rg8 Kh7 23. Rg7 Kh8 24. Rh7 Kg8 25. Rxe7 Re6 26. Rc1 h3 27. gxh3 a6 28. Qd8 Re8 29. Qe7 Rxe7 30. Rc8 Kg7 31. e6 g4 - Oct 31 19:42 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 29. Qe7 Rxe7 30. Rc8 Kg7 31. e6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 e6 6. Bxc6 h5 7. d4 g5 8. c4 Na6 9. Qa4 b5 10. Qa5 Nc7 11. c5 Rb8 12. Nc3 Rb6 13. cxd6 Bb4 14. Nxh8 Bf8 15. e5 Kf7 16. Bd2 Kg7 17. O-O Be7 18. Rac1 h4 19. Nd5 exd5 20. Rc6 Bd7 21. Rg6 Kh8 22. Rg8 Kh7 23. Rg7 Kh8 24. Rh7 Kg8 25. Rxe7 Re6 26. Rc1 h3 27. gxh3 a6 28. Qd8 Re8 29. Qe7 Rxe7 30. Rc8 Kg7 31. e6 - Oct 31 19:42 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Re8 29. Qe7 Rxe7 30. Rc8 Kg7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 e6 6. Bxc6 h5 7. d4 g5 8. c4 Na6 9. Qa4 b5 10. Qa5 Nc7 11. c5 Rb8 12. Nc3 Rb6 13. cxd6 Bb4 14. Nxh8 Bf8 15. e5 Kf7 16. Bd2 Kg7 17. O-O Be7 18. Rac1 h4 19. Nd5 exd5 20. Rc6 Bd7 21. Rg6 Kh8 22. Rg8 Kh7 23. Rg7 Kh8 24. Rh7 Kg8 25. Rxe7 Re6 26. Rc1 h3 27. gxh3 a6 28. Qd8 Re8 29. Qe7 Rxe7 30. Rc8 Kg7