104.3M
positions
22.2M
practically solved
385.12T
engine nodes
2.9M
analyses
268
in queue
active workers
28
active cores
24.1M
nodes / sec
7.1
positions / min
107
proof number
4,824
disproof number
Root conquest: 0/20 first moves solved · 21.3% of tree positions solved · last 24h: 118,303 closures, 2.26T 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 2.6m (median of 72) · measured at 2026-10-31 23:00 UTC
Closures by source, last 24h (118303 of 118303 labelled): USER 99.6% (117866) · FILL 0.3% (410) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.0% (27) · last 7d (1257631 of 1257631): USER 97.9% (1231359) · FILL 0.8% (9572) · AUTO 1.3% (16193) · SOLVE 0.0% (0) · NONE 0.0% (507). 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 … Nb4 12. axb4 a4 13. h3 Nf6 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#0
- 1. Nf3 d6 2. Ng5 f5 … Nb4 12. axb4 a4 13. h3 Rb8 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … Nb4 12. axb4 a4 13. h3 Bd7 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 d6 2. Ng5 f5 … Nb4 12. axb4 a4 13. h3 Bg7 (User) · 512.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … 10. Qe5 Qxe5 11. f4 b5 12. c4 (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 | 1107 | 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 71.5% of the fleet | 1.61T | 6,612 |
| 2 | RickEdinson 19.0% of the fleet | 428.67B | 2,846 |
| 3 | MoNiKaMaDnEsS 9.1% of the fleet | 205.60B | 1,355 |
| 4 | soothdest 0.5% of the fleet | 10.22B | 64 |
4 accounts · 2.26T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 23.4% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 20.4% of the fleet | 78.54T | 530,429 |
| 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 | 21.21T | 138,966 |
| 7 | randomchampgamer 5.2% of the fleet | 19.85T | 140,897 |
| 8 | MoNiKaMaDnEsS 3.2% 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 · 385.19T 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 23:53 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … Nb4 12. axb4 a4 13. h3 Rh6
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 a5 10. O-O Na6 11. a3 Nb4 12. axb4 a4 13. h3 Rh6 - Oct 31 23:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Kf8 29. Rg8 Ke7 30. Re8 Kf7
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 a5 10. O-O Na6 11. a3 Nb4 12. axb4 a4 13. h3 Rh6 14. Be7 Bg7 15. Nxh6 b5 16. Qd2 f4 17. g3 bxc4 18. Qb4 Kf7 19. Qb6 Ba6 20. Rc1 Rc8 21. d5 Kg7 22. Bf6 Kh6 23. Qa7 Ne7 24. Bg5 Kh7 25. Bxe7 Rc7 26. dxc6 Bb7 27. Rc7 Kg8 28. Rg7 Kf8 29. Rg8 Ke7 30. Re8 Kf7 - Oct 31 23:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 28. Rg7 Kf8 29. Rg8 Ke7 30. Re8
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 a5 10. O-O Na6 11. a3 Nb4 12. axb4 a4 13. h3 Rh6 14. Be7 Bg7 15. Nxh6 b5 16. Qd2 f4 17. g3 bxc4 18. Qb4 Kf7 19. Qb6 Ba6 20. Rc1 Rc8 21. d5 Kg7 22. Bf6 Kh6 23. Qa7 Ne7 24. Bg5 Kh7 25. Bxe7 Rc7 26. dxc6 Bb7 27. Rc7 Kg8 28. Rg7 Kf8 29. Rg8 Ke7 30. Re8 - Oct 31 23:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Kg8 28. Rg7 Kf8 29. Rg8 Ke7
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 a5 10. O-O Na6 11. a3 Nb4 12. axb4 a4 13. h3 Rh6 14. Be7 Bg7 15. Nxh6 b5 16. Qd2 f4 17. g3 bxc4 18. Qb4 Kf7 19. Qb6 Ba6 20. Rc1 Rc8 21. d5 Kg7 22. Bf6 Kh6 23. Qa7 Ne7 24. Bg5 Kh7 25. Bxe7 Rc7 26. dxc6 Bb7 27. Rc7 Kg8 28. Rg7 Kf8 29. Rg8 Ke7 - Oct 31 23:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 27. Rc7 Kg8 28. Rg7 Kf8 29. Rg8
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 a5 10. O-O Na6 11. a3 Nb4 12. axb4 a4 13. h3 Rh6 14. Be7 Bg7 15. Nxh6 b5 16. Qd2 f4 17. g3 bxc4 18. Qb4 Kf7 19. Qb6 Ba6 20. Rc1 Rc8 21. d5 Kg7 22. Bf6 Kh6 23. Qa7 Ne7 24. Bg5 Kh7 25. Bxe7 Rc7 26. dxc6 Bb7 27. Rc7 Kg8 28. Rg7 Kf8 29. Rg8 - Oct 31 23:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Bb7 27. Rc7 Kg8 28. Rg7 Kf8
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 a5 10. O-O Na6 11. a3 Nb4 12. axb4 a4 13. h3 Rh6 14. Be7 Bg7 15. Nxh6 b5 16. Qd2 f4 17. g3 bxc4 18. Qb4 Kf7 19. Qb6 Ba6 20. Rc1 Rc8 21. d5 Kg7 22. Bf6 Kh6 23. Qa7 Ne7 24. Bg5 Kh7 25. Bxe7 Rc7 26. dxc6 Bb7 27. Rc7 Kg8 28. Rg7 Kf8 - Oct 31 23:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 26. dxc6 Bb7 27. Rc7 Kg8 28. Rg7
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 a5 10. O-O Na6 11. a3 Nb4 12. axb4 a4 13. h3 Rh6 14. Be7 Bg7 15. Nxh6 b5 16. Qd2 f4 17. g3 bxc4 18. Qb4 Kf7 19. Qb6 Ba6 20. Rc1 Rc8 21. d5 Kg7 22. Bf6 Kh6 23. Qa7 Ne7 24. Bg5 Kh7 25. Bxe7 Rc7 26. dxc6 Bb7 27. Rc7 Kg8 28. Rg7 - Oct 31 23:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Rc7 26. dxc6 Bb7 27. Rc7 Kg8
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 a5 10. O-O Na6 11. a3 Nb4 12. axb4 a4 13. h3 Rh6 14. Be7 Bg7 15. Nxh6 b5 16. Qd2 f4 17. g3 bxc4 18. Qb4 Kf7 19. Qb6 Ba6 20. Rc1 Rc8 21. d5 Kg7 22. Bf6 Kh6 23. Qa7 Ne7 24. Bg5 Kh7 25. Bxe7 Rc7 26. dxc6 Bb7 27. Rc7 Kg8 - Oct 31 23:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 25. Bxe7 Rc7 26. dxc6 Bb7 27. Rc7
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 a5 10. O-O Na6 11. a3 Nb4 12. axb4 a4 13. h3 Rh6 14. Be7 Bg7 15. Nxh6 b5 16. Qd2 f4 17. g3 bxc4 18. Qb4 Kf7 19. Qb6 Ba6 20. Rc1 Rc8 21. d5 Kg7 22. Bf6 Kh6 23. Qa7 Ne7 24. Bg5 Kh7 25. Bxe7 Rc7 26. dxc6 Bb7 27. Rc7 - Oct 31 23:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Kh7 25. Bxe7 Rc7 26. dxc6 Bb7
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 a5 10. O-O Na6 11. a3 Nb4 12. axb4 a4 13. h3 Rh6 14. Be7 Bg7 15. Nxh6 b5 16. Qd2 f4 17. g3 bxc4 18. Qb4 Kf7 19. Qb6 Ba6 20. Rc1 Rc8 21. d5 Kg7 22. Bf6 Kh6 23. Qa7 Ne7 24. Bg5 Kh7 25. Bxe7 Rc7 26. dxc6 Bb7 - Oct 31 23:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 24. Bg5 Kh7 25. Bxe7 Rc7 26. dxc6
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 a5 10. O-O Na6 11. a3 Nb4 12. axb4 a4 13. h3 Rh6 14. Be7 Bg7 15. Nxh6 b5 16. Qd2 f4 17. g3 bxc4 18. Qb4 Kf7 19. Qb6 Ba6 20. Rc1 Rc8 21. d5 Kg7 22. Bf6 Kh6 23. Qa7 Ne7 24. Bg5 Kh7 25. Bxe7 Rc7 26. dxc6 - Oct 31 23:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Ne7 24. Bg5 Kh7 25. Bxe7 Rc7
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 a5 10. O-O Na6 11. a3 Nb4 12. axb4 a4 13. h3 Rh6 14. Be7 Bg7 15. Nxh6 b5 16. Qd2 f4 17. g3 bxc4 18. Qb4 Kf7 19. Qb6 Ba6 20. Rc1 Rc8 21. d5 Kg7 22. Bf6 Kh6 23. Qa7 Ne7 24. Bg5 Kh7 25. Bxe7 Rc7