84.8M
positions
16.2M
practically solved
311.17T
engine nodes
2.4M
analyses
3
in queue
5
active workers
28
active cores
4.4M
nodes / sec
6.2
positions / min
124
proof number
4,635
disproof number
Root conquest: 0/20 first moves solved · 19.1% of tree positions solved · last 24h: 140,963 closures, 2.62T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 over 212 open obligations, of which 40 (18.9%) sit at or below dn 2, one unanswered question from falling over · 0 open nodes on impossible numbers · measured at 2026-10-16 01:00 UTC
Closures by source, last 24h (140963 of 140963 labelled): USER 81.9% (115426) · FILL 1.7% (2385) · AUTO 16.4% (23087) · SOLVE 0.0% (0) · NONE 0.0% (65) · last 7d (887192 of 887192): USER 94.1% (834480) · FILL 0.6% (4940) · AUTO 5.3% (47293) · SOLVE 0.0% (0) · NONE 0.1% (479). 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 … 11. Ng5 Bxg5 12. f4 e5 13. g4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … Bxe5 7. h4 d6 8. f4 Bd7 (Fill) · 2.00B nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. Ne5 fxe5 … 13. Qc1 Qb8 14. Qe3 Nf6 15. Qa3 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. e4 e6 … 13. d4 O-O 14. g4 Nf5 15. exf5 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … 11. Ng5 Bxg5 12. f4 e5 13. fxe5 (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 | 1015 | 2 | |
| g1h3 | unsolved | 763 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 400 | 2 | |
| e2e4 | unsolved | 400 | 2 | |
| b1c3 | unsolved | 138 | 2 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b1a3 | unsolved | 0 | 3 | |
| b2b4 | unsolved | -65 | 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 53.2% of the fleet | 1.40T | 13,085 |
| 2 | randomchampgamer 18.8% of the fleet | 493.18B | 3,990 |
| 3 | RickEdinson 16.4% of the fleet | 428.97B | 3,771 |
| 4 | MoNiKaMaDnEsS 11.6% of the fleet | 305.10B | 2,484 |
| 5 | NeoArcturus <0.1% of the fleet | 144.9M | 4 |
5 accounts · 2.62T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 29.0% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 16.5% of the fleet | 51.47T | 360,269 |
| 3 | tenzink 13.8% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.1% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 6.4% of the fleet | 19.85T | 140,897 |
| 6 | Torom 5.0% of the fleet | 15.70T | 113,354 |
| 7 | RickEdinson 4.4% of the fleet | 13.74T | 91,369 |
| 8 | JackIV 3.2% of the fleet | 10.06T | 67,859 |
| 9 | MoNiKaMaDnEsS 2.6% of the fleet | 8.02T | 53,934 |
| 10 | gannet 2.3% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 311.20T 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 16 01:31 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. e4 e6 … Ng4 14. hxg4 g5 15. e5 dxe5
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O g6 7. h3 a6 8. Kh1 h5 9. Qe2 Bh6 10. Ng5 Bxg5 11. f4 d6 12. g3 Nh6 13. f5 Ng4 14. hxg4 g5 15. e5 dxe5 - Oct 16 01:31 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Kg7 27. Rg8 Kh7 28. Bd3 Kh6
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O g6 7. h3 a6 8. Kh1 h5 9. Qe2 Bh6 10. Ng5 Bxg5 11. f4 d6 12. g3 Nh6 13. f5 Ng4 14. hxg4 g5 15. e5 dxe5 16. fxe6 Qxd2 17. Rae1 Be6 18. Rxf6 Kf8 19. Re8 Kf7 20. Bc4 Kg6 21. Re6 Kf7 22. Re5 Kg7 23. Rf5 Rhc8 24. Rf7 Kg8 25. Rf8 Kh7 26. Rh8 Kg7 27. Rg8 Kh7 28. Bd3 Kh6 - Oct 16 01:31 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 26. Rh8 Kg7 27. Rg8 Kh7 28. Bd3
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O g6 7. h3 a6 8. Kh1 h5 9. Qe2 Bh6 10. Ng5 Bxg5 11. f4 d6 12. g3 Nh6 13. f5 Ng4 14. hxg4 g5 15. e5 dxe5 16. fxe6 Qxd2 17. Rae1 Be6 18. Rxf6 Kf8 19. Re8 Kf7 20. Bc4 Kg6 21. Re6 Kf7 22. Re5 Kg7 23. Rf5 Rhc8 24. Rf7 Kg8 25. Rf8 Kh7 26. Rh8 Kg7 27. Rg8 Kh7 28. Bd3 - Oct 16 01:31 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Kh7 26. Rh8 Kg7 27. Rg8 Kh7
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O g6 7. h3 a6 8. Kh1 h5 9. Qe2 Bh6 10. Ng5 Bxg5 11. f4 d6 12. g3 Nh6 13. f5 Ng4 14. hxg4 g5 15. e5 dxe5 16. fxe6 Qxd2 17. Rae1 Be6 18. Rxf6 Kf8 19. Re8 Kf7 20. Bc4 Kg6 21. Re6 Kf7 22. Re5 Kg7 23. Rf5 Rhc8 24. Rf7 Kg8 25. Rf8 Kh7 26. Rh8 Kg7 27. Rg8 Kh7 - Oct 16 01:31 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 25. Rf8 Kh7 26. Rh8 Kg7 27. Rg8
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O g6 7. h3 a6 8. Kh1 h5 9. Qe2 Bh6 10. Ng5 Bxg5 11. f4 d6 12. g3 Nh6 13. f5 Ng4 14. hxg4 g5 15. e5 dxe5 16. fxe6 Qxd2 17. Rae1 Be6 18. Rxf6 Kf8 19. Re8 Kf7 20. Bc4 Kg6 21. Re6 Kf7 22. Re5 Kg7 23. Rf5 Rhc8 24. Rf7 Kg8 25. Rf8 Kh7 26. Rh8 Kg7 27. Rg8 - Oct 16 01:31 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Kg8 25. Rf8 Kh7 26. Rh8 Kg7
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O g6 7. h3 a6 8. Kh1 h5 9. Qe2 Bh6 10. Ng5 Bxg5 11. f4 d6 12. g3 Nh6 13. f5 Ng4 14. hxg4 g5 15. e5 dxe5 16. fxe6 Qxd2 17. Rae1 Be6 18. Rxf6 Kf8 19. Re8 Kf7 20. Bc4 Kg6 21. Re6 Kf7 22. Re5 Kg7 23. Rf5 Rhc8 24. Rf7 Kg8 25. Rf8 Kh7 26. Rh8 Kg7 - Oct 16 01:31 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 24. Rf7 Kg8 25. Rf8 Kh7 26. Rh8
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O g6 7. h3 a6 8. Kh1 h5 9. Qe2 Bh6 10. Ng5 Bxg5 11. f4 d6 12. g3 Nh6 13. f5 Ng4 14. hxg4 g5 15. e5 dxe5 16. fxe6 Qxd2 17. Rae1 Be6 18. Rxf6 Kf8 19. Re8 Kf7 20. Bc4 Kg6 21. Re6 Kf7 22. Re5 Kg7 23. Rf5 Rhc8 24. Rf7 Kg8 25. Rf8 Kh7 26. Rh8 - Oct 16 01:31 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Rhc8 24. Rf7 Kg8 25. Rf8 Kh7
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O g6 7. h3 a6 8. Kh1 h5 9. Qe2 Bh6 10. Ng5 Bxg5 11. f4 d6 12. g3 Nh6 13. f5 Ng4 14. hxg4 g5 15. e5 dxe5 16. fxe6 Qxd2 17. Rae1 Be6 18. Rxf6 Kf8 19. Re8 Kf7 20. Bc4 Kg6 21. Re6 Kf7 22. Re5 Kg7 23. Rf5 Rhc8 24. Rf7 Kg8 25. Rf8 Kh7 - Oct 16 01:31 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 23. Rf5 Rhc8 24. Rf7 Kg8 25. Rf8
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O g6 7. h3 a6 8. Kh1 h5 9. Qe2 Bh6 10. Ng5 Bxg5 11. f4 d6 12. g3 Nh6 13. f5 Ng4 14. hxg4 g5 15. e5 dxe5 16. fxe6 Qxd2 17. Rae1 Be6 18. Rxf6 Kf8 19. Re8 Kf7 20. Bc4 Kg6 21. Re6 Kf7 22. Re5 Kg7 23. Rf5 Rhc8 24. Rf7 Kg8 25. Rf8 - Oct 16 01:31 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Kg7 23. Rf5 Rhc8 24. Rf7 Kg8
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O g6 7. h3 a6 8. Kh1 h5 9. Qe2 Bh6 10. Ng5 Bxg5 11. f4 d6 12. g3 Nh6 13. f5 Ng4 14. hxg4 g5 15. e5 dxe5 16. fxe6 Qxd2 17. Rae1 Be6 18. Rxf6 Kf8 19. Re8 Kf7 20. Bc4 Kg6 21. Re6 Kf7 22. Re5 Kg7 23. Rf5 Rhc8 24. Rf7 Kg8 - Oct 16 01:31 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 22. Re5 Kg7 23. Rf5 Rhc8 24. Rf7
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O g6 7. h3 a6 8. Kh1 h5 9. Qe2 Bh6 10. Ng5 Bxg5 11. f4 d6 12. g3 Nh6 13. f5 Ng4 14. hxg4 g5 15. e5 dxe5 16. fxe6 Qxd2 17. Rae1 Be6 18. Rxf6 Kf8 19. Re8 Kf7 20. Bc4 Kg6 21. Re6 Kf7 22. Re5 Kg7 23. Rf5 Rhc8 24. Rf7 - Oct 16 01:31 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Kf7 22. Re5 Kg7 23. Rf5 Rhc8
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O g6 7. h3 a6 8. Kh1 h5 9. Qe2 Bh6 10. Ng5 Bxg5 11. f4 d6 12. g3 Nh6 13. f5 Ng4 14. hxg4 g5 15. e5 dxe5 16. fxe6 Qxd2 17. Rae1 Be6 18. Rxf6 Kf8 19. Re8 Kf7 20. Bc4 Kg6 21. Re6 Kf7 22. Re5 Kg7 23. Rf5 Rhc8