83.1M
positions
15.9M
practically solved
304.48T
engine nodes
2.3M
analyses
47
in queue
14
active workers
74
active cores
11.6M
nodes / sec
26.2
positions / min
85
proof number
4,551
disproof number
Root conquest: 0/20 first moves solved · 19.1% of tree positions solved · last 24h: 104,078 closures, 3.10T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 70 over 217 open obligations, of which 41 (18.9%) 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 8.0m (median of 2) · measured at 2026-10-13 10:00 UTC
Closures by source, last 24h (104127 of 104127 labelled): USER 99.5% (103562) · FILL 0.5% (487) · AUTO 0.0% (16) · SOLVE 0.0% (0) · NONE 0.1% (62) · last 7d (1369108 of 1369108): USER 97.6% (1336069) · FILL 0.2% (3129) · AUTO 2.2% (29497) · SOLVE 0.0% (0) · NONE 0.0% (413). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nf3 f6 2. e4 e6 … 14. d4 dxe4 15. d5 Nh6 16. a6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … d5 15. e5 f5 16. Nh4 gxh4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. e4 e6 … Qxc4 12. d4 g5 13. Rd1 h6 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nh3 d5 2. Nc3 h6 … Nf5 13. Nxe6 Qe8 14. Bf4 Ba3 (User) · 512.0M nodes · MoNiKaMaDnEsS-DESKTOP-VG9VPVH-atomicdb
- 1. Nf3 f6 2. e4 e6 … d5 15. e5 f5 16. Rg1 h4 (User) · 128.0M nodes · randomchampgamer-2026PC-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 | 1105 | 2 | |
| g1h3 | unsolved | 753 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| e2e4 | unsolved | 400 | 2 | |
| d2d4 | unsolved | 393 | 2 | |
| b1c3 | unsolved | 127 | 2 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b1a3 | unsolved | 0 | 3 | |
| 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 | BManBJ 44.0% of the fleet | 1.36T | 8,501 |
| 2 | Torom 27.7% of the fleet | 859.87B | 5,773 |
| 3 | RickEdinson 14.0% of the fleet | 432.85B | 2,716 |
| 4 | MoNiKaMaDnEsS 9.7% of the fleet | 301.52B | 1,990 |
| 5 | randomchampgamer 4.6% of the fleet | 143.45B | 879 |
5 accounts · 3.10T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 29.6% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 16.0% of the fleet | 48.87T | 339,116 |
| 3 | tenzink 14.1% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.3% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 6.0% of the fleet | 18.30T | 131,620 |
| 6 | Torom 5.0% of the fleet | 15.26T | 110,621 |
| 7 | RickEdinson 4.2% of the fleet | 12.68T | 83,770 |
| 8 | JackIV 3.3% of the fleet | 10.06T | 67,859 |
| 9 | gannet 2.4% of the fleet | 7.24T | 46,848 |
| 10 | MoNiKaMaDnEsS 2.3% of the fleet | 7.16T | 48,408 |
and 25 more.
35 accounts · 304.70T 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 13 10:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Rd8 24. Kf3 Bh4 25. Rh7 Kg5
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. c3 h5 8. Ne5 fxe5 9. Bg5 Nf6 10. d5 Bc5 11. f4 Bf2 12. Kf1 d6 13. dxe6 Qa5 14. Qxd6 axb5 15. Rd1 O-O 16. Be7 Kh7 17. g4 g5 18. Bxf8 gxf4 19. Ke2 hxg4 20. Rhg1 Bg4 21. Rxg4 Rf8 22. Rd7 Kh6 23. Rf7 Rd8 24. Kf3 Bh4 25. Rh7 Kg5 - Oct 13 10:45 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 26. e5 Rd3 27. Ke4 Re3 28. Kf5
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. c3 h5 8. Ne5 fxe5 9. Bg5 Nf6 10. d5 Bc5 11. f4 Bf2 12. Kf1 d6 13. dxe6 Qa5 14. Qxd6 axb5 15. Rd1 O-O 16. Be7 Kh7 17. g4 g5 18. Bxf8 gxf4 19. Ke2 hxg4 20. Rhg1 Bg4 21. Rxg4 Rf8 22. Rd7 Kg6 23. Rg7 Kh5 24. Rf7 Rd8 25. Kf3 Bb6 26. e5 Rd3 27. Ke4 Re3 28. Kf5 - Oct 13 10:45 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Bb6 26. e5 Rd3 27. Ke4 Re3
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. c3 h5 8. Ne5 fxe5 9. Bg5 Nf6 10. d5 Bc5 11. f4 Bf2 12. Kf1 d6 13. dxe6 Qa5 14. Qxd6 axb5 15. Rd1 O-O 16. Be7 Kh7 17. g4 g5 18. Bxf8 gxf4 19. Ke2 hxg4 20. Rhg1 Bg4 21. Rxg4 Rf8 22. Rd7 Kg6 23. Rg7 Kh5 24. Rf7 Rd8 25. Kf3 Bb6 26. e5 Rd3 27. Ke4 Re3 - Oct 13 10:45 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 25. Kf3 Bb6 26. e5 Rd3 27. Ke4
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. c3 h5 8. Ne5 fxe5 9. Bg5 Nf6 10. d5 Bc5 11. f4 Bf2 12. Kf1 d6 13. dxe6 Qa5 14. Qxd6 axb5 15. Rd1 O-O 16. Be7 Kh7 17. g4 g5 18. Bxf8 gxf4 19. Ke2 hxg4 20. Rhg1 Bg4 21. Rxg4 Rf8 22. Rd7 Kg6 23. Rg7 Kh5 24. Rf7 Rd8 25. Kf3 Bb6 26. e5 Rd3 27. Ke4 - Oct 13 10:45 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 27. Ke4 Bg3 28. hxg3 Re3 29. Kd5
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. c3 h5 8. Ne5 fxe5 9. Bg5 Nf6 10. d5 Bc5 11. f4 Bf2 12. Kf1 d6 13. dxe6 Qa5 14. Qxd6 axb5 15. Rd1 O-O 16. Be7 Kh7 17. g4 g5 18. Bxf8 gxf4 19. Ke2 hxg4 20. Rhg1 Bg4 21. Rxg4 Rf8 22. Rd7 Kg6 23. Rg7 Kh5 24. Rf7 Rd8 25. Kf3 Rd1 26. e5 Rd3 27. Ke4 Bg3 28. hxg3 Re3 29. Kd5 - Oct 13 10:45 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Rd3 27. Ke4 Bg3 28. hxg3 Re3
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. c3 h5 8. Ne5 fxe5 9. Bg5 Nf6 10. d5 Bc5 11. f4 Bf2 12. Kf1 d6 13. dxe6 Qa5 14. Qxd6 axb5 15. Rd1 O-O 16. Be7 Kh7 17. g4 g5 18. Bxf8 gxf4 19. Ke2 hxg4 20. Rhg1 Bg4 21. Rxg4 Rf8 22. Rd7 Kg6 23. Rg7 Kh5 24. Rf7 Rd8 25. Kf3 Rd1 26. e5 Rd3 27. Ke4 Bg3 28. hxg3 Re3 - Oct 13 10:45 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 26. e5 Rd3 27. Ke4 Bg3 28. hxg3
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. c3 h5 8. Ne5 fxe5 9. Bg5 Nf6 10. d5 Bc5 11. f4 Bf2 12. Kf1 d6 13. dxe6 Qa5 14. Qxd6 axb5 15. Rd1 O-O 16. Be7 Kh7 17. g4 g5 18. Bxf8 gxf4 19. Ke2 hxg4 20. Rhg1 Bg4 21. Rxg4 Rf8 22. Rd7 Kg6 23. Rg7 Kh5 24. Rf7 Rd8 25. Kf3 Rd1 26. e5 Rd3 27. Ke4 Bg3 28. hxg3 - Oct 13 10:45 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Rd1 26. e5 Rd3 27. Ke4 Bg3
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. c3 h5 8. Ne5 fxe5 9. Bg5 Nf6 10. d5 Bc5 11. f4 Bf2 12. Kf1 d6 13. dxe6 Qa5 14. Qxd6 axb5 15. Rd1 O-O 16. Be7 Kh7 17. g4 g5 18. Bxf8 gxf4 19. Ke2 hxg4 20. Rhg1 Bg4 21. Rxg4 Rf8 22. Rd7 Kg6 23. Rg7 Kh5 24. Rf7 Rd8 25. Kf3 Rd1 26. e5 Rd3 27. Ke4 Bg3 - Oct 13 10:45 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 25. Kf3 Rd1 26. e5 Rd3 27. Ke4
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. c3 h5 8. Ne5 fxe5 9. Bg5 Nf6 10. d5 Bc5 11. f4 Bf2 12. Kf1 d6 13. dxe6 Qa5 14. Qxd6 axb5 15. Rd1 O-O 16. Be7 Kh7 17. g4 g5 18. Bxf8 gxf4 19. Ke2 hxg4 20. Rhg1 Bg4 21. Rxg4 Rf8 22. Rd7 Kg6 23. Rg7 Kh5 24. Rf7 Rd8 25. Kf3 Rd1 26. e5 Rd3 27. Ke4 - Oct 13 10:45 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 27. Rg7 Rf8 28. Kg2 Rf2 29. Kh1
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. c3 h5 8. Ne5 fxe5 9. Bg5 Nf6 10. d5 Bc5 11. f4 Bf2 12. Kf1 d6 13. dxe6 Qa5 14. Qxd6 axb5 15. Rd1 O-O 16. Be7 Kh7 17. g4 g5 18. Bxf8 gxf4 19. Ke2 hxg4 20. Rhg1 Bg4 21. Rxg4 Rf8 22. Rd7 Kg6 23. Rg7 Kh5 24. Rf7 Rd8 25. Kf3 Bc5 26. b4 Rg8 27. Rg7 Rf8 28. Kg2 Rf2 29. Kh1 - Oct 13 10:45 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Rg8 27. Rg7 Rf8 28. Kg2 Rf2
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. c3 h5 8. Ne5 fxe5 9. Bg5 Nf6 10. d5 Bc5 11. f4 Bf2 12. Kf1 d6 13. dxe6 Qa5 14. Qxd6 axb5 15. Rd1 O-O 16. Be7 Kh7 17. g4 g5 18. Bxf8 gxf4 19. Ke2 hxg4 20. Rhg1 Bg4 21. Rxg4 Rf8 22. Rd7 Kg6 23. Rg7 Kh5 24. Rf7 Rd8 25. Kf3 Bc5 26. b4 Rg8 27. Rg7 Rf8 28. Kg2 Rf2 - Oct 13 10:45 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 26. b4 Rg8 27. Rg7 Rf8 28. Kg2
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. c3 h5 8. Ne5 fxe5 9. Bg5 Nf6 10. d5 Bc5 11. f4 Bf2 12. Kf1 d6 13. dxe6 Qa5 14. Qxd6 axb5 15. Rd1 O-O 16. Be7 Kh7 17. g4 g5 18. Bxf8 gxf4 19. Ke2 hxg4 20. Rhg1 Bg4 21. Rxg4 Rf8 22. Rd7 Kg6 23. Rg7 Kh5 24. Rf7 Rd8 25. Kf3 Bc5 26. b4 Rg8 27. Rg7 Rf8 28. Kg2