103.5M
positions
21.9M
practically solved
381.32T
engine nodes
2.8M
analyses
268
in queue
active workers
36
active cores
33.3M
nodes / sec
8.7
positions / min
107
proof number
4,824
disproof number
Root conquest: 0/20 first moves solved · 21.1% of tree positions solved · last 24h: 244,815 closures, 4.40T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 over 200 open obligations, of which 36 (18.0%) 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 7.0m (median of 94) · measured at 2026-10-30 09:00 UTC
Closures by source, last 24h (244815 of 244815 labelled): USER 97.6% (239002) · FILL 1.6% (3936) · AUTO 0.7% (1824) · SOLVE 0.0% (0) · NONE 0.0% (53) · last 7d (1415175 of 1415175): USER 98.1% (1388747) · FILL 0.7% (9638) · AUTO 1.1% (16257) · SOLVE 0.0% (0) · NONE 0.0% (533). 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 f6 2. e4 e6 … f5 11. g3 Nh6 12. a3 O-O (User) · 128.0M nodes · BManBJ-Blake-atomicdb#0
- 1. Nf3 d6 2. Ng5 f5 … Na6 12. a3 b6 13. g3 f4 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … Na6 12. a3 b6 13. g3 a4 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 d6 2. Ng5 f5 … Nd7 14. Ke2 Bd8 15. b3 a5 (User) · 128.0M nodes · MoNiKaMaDnEsS-DESKTOP-VG9VPVH-atomicdb
- 1. Nh3 f6 2. Nc3 h6 … Kd8 15. Nxh5 g5 16. h4 Na6 (User) · 512.0M 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 | 1165 | 2 | |
| g1h3 | unsolved | 820 | 2 | |
| e2e3 | unsolved | 469 | 3 | |
| e2e4 | unsolved | 410 | 2 | |
| d2d4 | unsolved | 405 | 2 | |
| b1c3 | unsolved | 141 | 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 | Torom 44.2% of the fleet | 1.95T | 11,779 |
| 2 | BManBJ 38.2% of the fleet | 1.68T | 5,679 |
| 3 | RickEdinson 10.5% of the fleet | 460.86B | 3,035 |
| 4 | MoNiKaMaDnEsS 7.1% of the fleet | 311.56B | 2,294 |
4 accounts · 4.40T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 23.7% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 19.9% of the fleet | 75.95T | 520,164 |
| 3 | Torom 13.3% of the fleet | 50.55T | 363,522 |
| 4 | tenzink 11.2% of the fleet | 42.83T | 349,427 |
| 5 | auranvesdranor 8.2% of the fleet | 31.40T | 228,002 |
| 6 | RickEdinson 5.4% of the fleet | 20.53T | 134,773 |
| 7 | randomchampgamer 5.2% of the fleet | 19.85T | 140,897 |
| 8 | MoNiKaMaDnEsS 3.2% of the fleet | 12.03T | 82,902 |
| 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 · 381.42T 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 30 09:57 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … Nd7 14. Ke2 Bd8 15. b3 h6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Na6 7. Nd8 e5 8. Nxb7 Nf6 9. f4 e4 10. Bxc6 Be7 11. Qe2 O-O 12. Qb5 d5 13. d4 Nd7 14. Ke2 Bd8 15. b3 h6 - Oct 30 09:57 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Kg8 29. Rf1 Bf6 30. Rh8 Kf7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Na6 7. Nd8 e5 8. Nxb7 Nf6 9. f4 e4 10. Bxc6 Be7 11. Qe2 O-O 12. Qb5 d5 13. d4 Nd7 14. Ke2 Bd8 15. b3 h6 16. Ba3 Rf6 17. f5 a6 18. Qc6 Rxc6 19. f6 gxf6 20. Rf1 h5 21. Rf8 Kg7 22. Rf7 Kg8 23. Nc3 Bh4 24. g3 Be7 25. Rf8 Kg7 26. Rg8 Kh7 27. Rh8 Kg7 28. Rh7 Kg8 29. Rf1 Bf6 30. Rh8 Kf7 - Oct 30 09:57 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 28. Rh7 Kg8 29. Rf1 Bf6 30. Rh8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Na6 7. Nd8 e5 8. Nxb7 Nf6 9. f4 e4 10. Bxc6 Be7 11. Qe2 O-O 12. Qb5 d5 13. d4 Nd7 14. Ke2 Bd8 15. b3 h6 16. Ba3 Rf6 17. f5 a6 18. Qc6 Rxc6 19. f6 gxf6 20. Rf1 h5 21. Rf8 Kg7 22. Rf7 Kg8 23. Nc3 Bh4 24. g3 Be7 25. Rf8 Kg7 26. Rg8 Kh7 27. Rh8 Kg7 28. Rh7 Kg8 29. Rf1 Bf6 30. Rh8 - Oct 30 09:57 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Kg7 28. Rh7 Kg8 29. Rf1 Bf6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Na6 7. Nd8 e5 8. Nxb7 Nf6 9. f4 e4 10. Bxc6 Be7 11. Qe2 O-O 12. Qb5 d5 13. d4 Nd7 14. Ke2 Bd8 15. b3 h6 16. Ba3 Rf6 17. f5 a6 18. Qc6 Rxc6 19. f6 gxf6 20. Rf1 h5 21. Rf8 Kg7 22. Rf7 Kg8 23. Nc3 Bh4 24. g3 Be7 25. Rf8 Kg7 26. Rg8 Kh7 27. Rh8 Kg7 28. Rh7 Kg8 29. Rf1 Bf6 - Oct 30 09:57 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 27. Rh8 Kg7 28. Rh7 Kg8 29. Rf1
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Na6 7. Nd8 e5 8. Nxb7 Nf6 9. f4 e4 10. Bxc6 Be7 11. Qe2 O-O 12. Qb5 d5 13. d4 Nd7 14. Ke2 Bd8 15. b3 h6 16. Ba3 Rf6 17. f5 a6 18. Qc6 Rxc6 19. f6 gxf6 20. Rf1 h5 21. Rf8 Kg7 22. Rf7 Kg8 23. Nc3 Bh4 24. g3 Be7 25. Rf8 Kg7 26. Rg8 Kh7 27. Rh8 Kg7 28. Rh7 Kg8 29. Rf1 - Oct 30 09:57 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Kh7 27. Rh8 Kg7 28. Rh7 Kg8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Na6 7. Nd8 e5 8. Nxb7 Nf6 9. f4 e4 10. Bxc6 Be7 11. Qe2 O-O 12. Qb5 d5 13. d4 Nd7 14. Ke2 Bd8 15. b3 h6 16. Ba3 Rf6 17. f5 a6 18. Qc6 Rxc6 19. f6 gxf6 20. Rf1 h5 21. Rf8 Kg7 22. Rf7 Kg8 23. Nc3 Bh4 24. g3 Be7 25. Rf8 Kg7 26. Rg8 Kh7 27. Rh8 Kg7 28. Rh7 Kg8 - Oct 30 09:57 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 26. Rg8 Kh7 27. Rh8 Kg7 28. Rh7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Na6 7. Nd8 e5 8. Nxb7 Nf6 9. f4 e4 10. Bxc6 Be7 11. Qe2 O-O 12. Qb5 d5 13. d4 Nd7 14. Ke2 Bd8 15. b3 h6 16. Ba3 Rf6 17. f5 a6 18. Qc6 Rxc6 19. f6 gxf6 20. Rf1 h5 21. Rf8 Kg7 22. Rf7 Kg8 23. Nc3 Bh4 24. g3 Be7 25. Rf8 Kg7 26. Rg8 Kh7 27. Rh8 Kg7 28. Rh7 - Oct 30 09:57 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Kg7 26. Rg8 Kh7 27. Rh8 Kg7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Na6 7. Nd8 e5 8. Nxb7 Nf6 9. f4 e4 10. Bxc6 Be7 11. Qe2 O-O 12. Qb5 d5 13. d4 Nd7 14. Ke2 Bd8 15. b3 h6 16. Ba3 Rf6 17. f5 a6 18. Qc6 Rxc6 19. f6 gxf6 20. Rf1 h5 21. Rf8 Kg7 22. Rf7 Kg8 23. Nc3 Bh4 24. g3 Be7 25. Rf8 Kg7 26. Rg8 Kh7 27. Rh8 Kg7 - Oct 30 09:57 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 25. Rf8 Kg7 26. Rg8 Kh7 27. Rh8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Na6 7. Nd8 e5 8. Nxb7 Nf6 9. f4 e4 10. Bxc6 Be7 11. Qe2 O-O 12. Qb5 d5 13. d4 Nd7 14. Ke2 Bd8 15. b3 h6 16. Ba3 Rf6 17. f5 a6 18. Qc6 Rxc6 19. f6 gxf6 20. Rf1 h5 21. Rf8 Kg7 22. Rf7 Kg8 23. Nc3 Bh4 24. g3 Be7 25. Rf8 Kg7 26. Rg8 Kh7 27. Rh8 - Oct 30 09:57 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Be7 25. Rf8 Kg7 26. Rg8 Kh7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Na6 7. Nd8 e5 8. Nxb7 Nf6 9. f4 e4 10. Bxc6 Be7 11. Qe2 O-O 12. Qb5 d5 13. d4 Nd7 14. Ke2 Bd8 15. b3 h6 16. Ba3 Rf6 17. f5 a6 18. Qc6 Rxc6 19. f6 gxf6 20. Rf1 h5 21. Rf8 Kg7 22. Rf7 Kg8 23. Nc3 Bh4 24. g3 Be7 25. Rf8 Kg7 26. Rg8 Kh7 - Oct 30 09:57 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 24. g3 Be7 25. Rf8 Kg7 26. Rg8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Na6 7. Nd8 e5 8. Nxb7 Nf6 9. f4 e4 10. Bxc6 Be7 11. Qe2 O-O 12. Qb5 d5 13. d4 Nd7 14. Ke2 Bd8 15. b3 h6 16. Ba3 Rf6 17. f5 a6 18. Qc6 Rxc6 19. f6 gxf6 20. Rf1 h5 21. Rf8 Kg7 22. Rf7 Kg8 23. Nc3 Bh4 24. g3 Be7 25. Rf8 Kg7 26. Rg8 - Oct 30 09:57 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Bh4 24. g3 Be7 25. Rf8 Kg7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Na6 7. Nd8 e5 8. Nxb7 Nf6 9. f4 e4 10. Bxc6 Be7 11. Qe2 O-O 12. Qb5 d5 13. d4 Nd7 14. Ke2 Bd8 15. b3 h6 16. Ba3 Rf6 17. f5 a6 18. Qc6 Rxc6 19. f6 gxf6 20. Rf1 h5 21. Rf8 Kg7 22. Rf7 Kg8 23. Nc3 Bh4 24. g3 Be7 25. Rf8 Kg7