84.8M
positions
16.2M
practically solved
311.08T
engine nodes
2.4M
analyses
168
in queue
5
active workers
28
active cores
7.7M
nodes / sec
8.9
positions / min
124
proof number
4,635
disproof number
Root conquest: 0/20 first moves solved · 19.1% of tree positions solved · last 24h: 142,774 closures, 2.63T 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 00:00 UTC
Closures by source, last 24h (142774 of 142774 labelled): USER 81.3% (116088) · FILL 1.5% (2167) · AUTO 17.1% (24447) · SOLVE 0.0% (0) · NONE 0.1% (72) · last 7d (896101 of 896101): USER 94.2% (843710) · FILL 0.5% (4619) · 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 e5 2. Ng5 f5 … b5 6. Nxh7 g6 7. f4 exf3 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 c6 … Ng4 10. Kh1 h6 11. Ng5 Nb8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 e5 2. Ng5 f5 … 4. e3 d5 5. Na3 Nf6 6. Nb5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
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 52.8% of the fleet | 1.39T | 13,473 |
| 2 | randomchampgamer 19.3% of the fleet | 507.39B | 4,248 |
| 3 | RickEdinson 16.2% of the fleet | 426.29B | 3,898 |
| 4 | MoNiKaMaDnEsS 11.6% of the fleet | 305.10B | 2,484 |
| 5 | NeoArcturus <0.1% of the fleet | 144.9M | 4 |
5 accounts · 2.63T 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 | 51.43T | 359,991 |
| 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 | 13.73T | 91,292 |
| 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 · 311.15T 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 00:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Kf8 22. Re8 Kf7 23. Rf8 Ke7
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 a6 8. O-O h5 9. d5 axb5 10. Kh1 Qc7 11. Bf4 Qxc2 12. dxe6 Bb4 13. Rfd1 d5 14. Rac1 Kf8 15. exd5 Bg4 16. Rd7 Bxd7 17. Rc7 Nh6 18. Re7 Kg8 19. Rg7 Kf8 20. Nd4 Ke8 21. Re7 Kf8 22. Re8 Kf7 23. Rf8 Ke7 - Oct 16 00:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 21. Re7 Kf8 22. Re8 Kf7 23. Rf8
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 a6 8. O-O h5 9. d5 axb5 10. Kh1 Qc7 11. Bf4 Qxc2 12. dxe6 Bb4 13. Rfd1 d5 14. Rac1 Kf8 15. exd5 Bg4 16. Rd7 Bxd7 17. Rc7 Nh6 18. Re7 Kg8 19. Rg7 Kf8 20. Nd4 Ke8 21. Re7 Kf8 22. Re8 Kf7 23. Rf8 - Oct 16 00:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Ke8 21. Re7 Kf8 22. Re8 Kf7
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 a6 8. O-O h5 9. d5 axb5 10. Kh1 Qc7 11. Bf4 Qxc2 12. dxe6 Bb4 13. Rfd1 d5 14. Rac1 Kf8 15. exd5 Bg4 16. Rd7 Bxd7 17. Rc7 Nh6 18. Re7 Kg8 19. Rg7 Kf8 20. Nd4 Ke8 21. Re7 Kf8 22. Re8 Kf7 - Oct 16 00:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 20. Nd4 Ke8 21. Re7 Kf8 22. Re8
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 a6 8. O-O h5 9. d5 axb5 10. Kh1 Qc7 11. Bf4 Qxc2 12. dxe6 Bb4 13. Rfd1 d5 14. Rac1 Kf8 15. exd5 Bg4 16. Rd7 Bxd7 17. Rc7 Nh6 18. Re7 Kg8 19. Rg7 Kf8 20. Nd4 Ke8 21. Re7 Kf8 22. Re8 - Oct 16 00:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Kf8 20. Nd4 Ke8 21. Re7 Kf8
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 a6 8. O-O h5 9. d5 axb5 10. Kh1 Qc7 11. Bf4 Qxc2 12. dxe6 Bb4 13. Rfd1 d5 14. Rac1 Kf8 15. exd5 Bg4 16. Rd7 Bxd7 17. Rc7 Nh6 18. Re7 Kg8 19. Rg7 Kf8 20. Nd4 Ke8 21. Re7 Kf8 - Oct 16 00:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 19. Rg7 Kf8 20. Nd4 Ke8 21. Re7
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 a6 8. O-O h5 9. d5 axb5 10. Kh1 Qc7 11. Bf4 Qxc2 12. dxe6 Bb4 13. Rfd1 d5 14. Rac1 Kf8 15. exd5 Bg4 16. Rd7 Bxd7 17. Rc7 Nh6 18. Re7 Kg8 19. Rg7 Kf8 20. Nd4 Ke8 21. Re7 - Oct 16 00:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Kg8 19. Rg7 Kf8 20. Nd4 Ke8
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 a6 8. O-O h5 9. d5 axb5 10. Kh1 Qc7 11. Bf4 Qxc2 12. dxe6 Bb4 13. Rfd1 d5 14. Rac1 Kf8 15. exd5 Bg4 16. Rd7 Bxd7 17. Rc7 Nh6 18. Re7 Kg8 19. Rg7 Kf8 20. Nd4 Ke8 - Oct 16 00:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 18. Re7 Kg8 19. Rg7 Kf8 20. Nd4
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 a6 8. O-O h5 9. d5 axb5 10. Kh1 Qc7 11. Bf4 Qxc2 12. dxe6 Bb4 13. Rfd1 d5 14. Rac1 Kf8 15. exd5 Bg4 16. Rd7 Bxd7 17. Rc7 Nh6 18. Re7 Kg8 19. Rg7 Kf8 20. Nd4 - Oct 16 00:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Nh6 18. Re7 Kg8 19. Rg7 Kf8
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 a6 8. O-O h5 9. d5 axb5 10. Kh1 Qc7 11. Bf4 Qxc2 12. dxe6 Bb4 13. Rfd1 d5 14. Rac1 Kf8 15. exd5 Bg4 16. Rd7 Bxd7 17. Rc7 Nh6 18. Re7 Kg8 19. Rg7 Kf8 - Oct 16 00:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 17. Rc7 Nh6 18. Re7 Kg8 19. Rg7
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 a6 8. O-O h5 9. d5 axb5 10. Kh1 Qc7 11. Bf4 Qxc2 12. dxe6 Bb4 13. Rfd1 d5 14. Rac1 Kf8 15. exd5 Bg4 16. Rd7 Bxd7 17. Rc7 Nh6 18. Re7 Kg8 19. Rg7 - Oct 16 00:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Bxd7 17. Rc7 Nh6 18. Re7 Kg8
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 a6 8. O-O h5 9. d5 axb5 10. Kh1 Qc7 11. Bf4 Qxc2 12. dxe6 Bb4 13. Rfd1 d5 14. Rac1 Kf8 15. exd5 Bg4 16. Rd7 Bxd7 17. Rc7 Nh6 18. Re7 Kg8 - Oct 16 00:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 16. Rd7 Bxd7 17. Rc7 Nh6 18. Re7
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 a6 8. O-O h5 9. d5 axb5 10. Kh1 Qc7 11. Bf4 Qxc2 12. dxe6 Bb4 13. Rfd1 d5 14. Rac1 Kf8 15. exd5 Bg4 16. Rd7 Bxd7 17. Rc7 Nh6 18. Re7