105.3M
positions
22.4M
practically solved
390.33T
engine nodes
2.9M
analyses
1,319
in queue
active workers
124
active cores
136.6M
nodes / sec
58.5
positions / min
108
proof number
4,824
disproof number
Root conquest: 0/20 first moves solved · 21.3% of tree positions solved · last 24h: 202,626 closures, 5.65T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 72 over 199 open obligations, of which 37 (18.6%) 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 1.8m (median of 44) · measured at 2026-11-01 21:00 UTC
Closures by source, last 24h (202626 of 202626 labelled): USER 98.2% (198959) · FILL 1.5% (2952) · AUTO 0.3% (659) · SOLVE 0.0% (0) · NONE 0.0% (56) · last 7d (1291032 of 1291032): USER 97.7% (1261173) · FILL 1.0% (12524) · AUTO 1.3% (16852) · SOLVE 0.0% (0) · NONE 0.0% (483). 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 … 16. Nd8 Bh2 17. b4 O-O 18. Rd1 (User) · 128.0M nodes · acornwood
- 1. Nf3 d6 2. Ng5 f5 … c6 11. Bxc6 Nb4 12. Na3 b5 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#0
- 1. Nf3 d6 2. Ng5 f5 … f4 9. Bd2 a6 10. h3 Ra7 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … f4 9. Bd2 a6 10. h3 Nc6 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 d6 2. Ng5 f5 … f4 9. Bd2 a6 10. h3 d5 (User) · 512.0M nodes · BManBJ-Laptop-Blake-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 | 1112 | 2 | |
| g1h3 | unsolved | 738 | 2 | |
| d2d4 | unsolved | 443 | 2 | |
| e2e3 | unsolved | 437 | 3 | |
| e2e4 | unsolved | 400 | 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 | gannet 48.1% of the fleet | 2.72T | 18,610 |
| 2 | BManBJ 29.1% of the fleet | 1.65T | 6,872 |
| 3 | Torom 10.8% of the fleet | 608.05B | 4,110 |
| 4 | RickEdinson 8.1% of the fleet | 458.53B | 3,076 |
| 5 | MoNiKaMaDnEsS 3.2% of the fleet | 178.93B | 1,210 |
| 6 | soothdest 0.8% of the fleet | 45.48B | 271 |
6 accounts · 5.65T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 23.1% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 20.5% of the fleet | 80.04T | 536,765 |
| 3 | Torom 13.1% of the fleet | 51.15T | 367,632 |
| 4 | tenzink 11.0% of the fleet | 42.83T | 349,427 |
| 5 | auranvesdranor 8.0% of the fleet | 31.40T | 228,002 |
| 6 | RickEdinson 5.5% of the fleet | 21.63T | 141,781 |
| 7 | randomchampgamer 5.1% of the fleet | 19.85T | 140,897 |
| 8 | MoNiKaMaDnEsS 3.2% of the fleet | 12.69T | 87,688 |
| 9 | JackIV 2.6% of the fleet | 10.06T | 67,859 |
| 10 | gannet 2.5% of the fleet | 9.95T | 65,457 |
and 25 more.
35 accounts · 390.66T 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
- Nov 01 21:45 Solved: BLACK_WIN via MATE_PVview
1. Nh3 f6 2. e4 e5 … 12. Bc1 cxb5 13. Ng5 Ne1 14. b3
1. Nh3 f6 2. e4 e5 3. Na3 d5 4. d4 h6 5. Bf4 h5 6. c3 Na6 7. Nb5 Bg4 8. f3 Nb4 9. Nd6 Qxd6 10. Bb5 c6 11. O-O Nc2 12. Bc1 cxb5 13. Ng5 Ne1 14. b3 - Nov 01 21:45 Solved: BLACK_WIN via MATE_PVview
1. Nh3 f6 2. e4 e5 … 12. Bc1 cxb5 13. Ng5 Ne1 14. a3
1. Nh3 f6 2. e4 e5 3. Na3 d5 4. d4 h6 5. Bf4 h5 6. c3 Na6 7. Nb5 Bg4 8. f3 Nb4 9. Nd6 Qxd6 10. Bb5 c6 11. O-O Nc2 12. Bc1 cxb5 13. Ng5 Ne1 14. a3 - Nov 01 21:45 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … c6 11. Bxc6 Nb4 12. Na3 Rh7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Na6 6. Bg5 Nf6 7. Nd8 g6 8. Bc4 d5 9. Ne6 Bh6 10. Bb5 c6 11. Bxc6 Nb4 12. Na3 Rh7 - Nov 01 21:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … b4 26. Qa4 Kf8 27. Qe8 Kg7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Na6 6. Bg5 Nf6 7. Nd8 g6 8. Bc4 d5 9. Ne6 Bh6 10. Bb5 c6 11. Bxc6 Nb4 12. Na3 Rh7 13. e5 Bxg5 14. Nf8 Be6 15. Nb5 f4 16. a3 Bg4 17. f3 Nc6 18. c4 Nb4 19. Nc7 Kd8 20. axb4 a5 21. cxd5 Ra6 22. Nxa6 Be6 23. Nxe6 Ke8 24. Qa4 b5 25. Qa3 b4 26. Qa4 Kf8 27. Qe8 Kg7 - Nov 01 21:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 25. Qa3 b4 26. Qa4 Kf8 27. Qe8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Na6 6. Bg5 Nf6 7. Nd8 g6 8. Bc4 d5 9. Ne6 Bh6 10. Bb5 c6 11. Bxc6 Nb4 12. Na3 Rh7 13. e5 Bxg5 14. Nf8 Be6 15. Nb5 f4 16. a3 Bg4 17. f3 Nc6 18. c4 Nb4 19. Nc7 Kd8 20. axb4 a5 21. cxd5 Ra6 22. Nxa6 Be6 23. Nxe6 Ke8 24. Qa4 b5 25. Qa3 b4 26. Qa4 Kf8 27. Qe8 - Nov 01 21:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … b5 25. Qa3 b4 26. Qa4 Kf8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Na6 6. Bg5 Nf6 7. Nd8 g6 8. Bc4 d5 9. Ne6 Bh6 10. Bb5 c6 11. Bxc6 Nb4 12. Na3 Rh7 13. e5 Bxg5 14. Nf8 Be6 15. Nb5 f4 16. a3 Bg4 17. f3 Nc6 18. c4 Nb4 19. Nc7 Kd8 20. axb4 a5 21. cxd5 Ra6 22. Nxa6 Be6 23. Nxe6 Ke8 24. Qa4 b5 25. Qa3 b4 26. Qa4 Kf8 - Nov 01 21:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 24. Qa4 b5 25. Qa3 b4 26. Qa4
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Na6 6. Bg5 Nf6 7. Nd8 g6 8. Bc4 d5 9. Ne6 Bh6 10. Bb5 c6 11. Bxc6 Nb4 12. Na3 Rh7 13. e5 Bxg5 14. Nf8 Be6 15. Nb5 f4 16. a3 Bg4 17. f3 Nc6 18. c4 Nb4 19. Nc7 Kd8 20. axb4 a5 21. cxd5 Ra6 22. Nxa6 Be6 23. Nxe6 Ke8 24. Qa4 b5 25. Qa3 b4 26. Qa4 - Nov 01 21:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Ke8 24. Qa4 b5 25. Qa3 b4
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Na6 6. Bg5 Nf6 7. Nd8 g6 8. Bc4 d5 9. Ne6 Bh6 10. Bb5 c6 11. Bxc6 Nb4 12. Na3 Rh7 13. e5 Bxg5 14. Nf8 Be6 15. Nb5 f4 16. a3 Bg4 17. f3 Nc6 18. c4 Nb4 19. Nc7 Kd8 20. axb4 a5 21. cxd5 Ra6 22. Nxa6 Be6 23. Nxe6 Ke8 24. Qa4 b5 25. Qa3 b4 - Nov 01 21:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 23. Nxe6 Ke8 24. Qa4 b5 25. Qa3
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Na6 6. Bg5 Nf6 7. Nd8 g6 8. Bc4 d5 9. Ne6 Bh6 10. Bb5 c6 11. Bxc6 Nb4 12. Na3 Rh7 13. e5 Bxg5 14. Nf8 Be6 15. Nb5 f4 16. a3 Bg4 17. f3 Nc6 18. c4 Nb4 19. Nc7 Kd8 20. axb4 a5 21. cxd5 Ra6 22. Nxa6 Be6 23. Nxe6 Ke8 24. Qa4 b5 25. Qa3 - Nov 01 21:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Be6 23. Nxe6 Ke8 24. Qa4 b5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Na6 6. Bg5 Nf6 7. Nd8 g6 8. Bc4 d5 9. Ne6 Bh6 10. Bb5 c6 11. Bxc6 Nb4 12. Na3 Rh7 13. e5 Bxg5 14. Nf8 Be6 15. Nb5 f4 16. a3 Bg4 17. f3 Nc6 18. c4 Nb4 19. Nc7 Kd8 20. axb4 a5 21. cxd5 Ra6 22. Nxa6 Be6 23. Nxe6 Ke8 24. Qa4 b5 - Nov 01 21:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 22. Nxa6 Be6 23. Nxe6 Ke8 24. Qa4
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Na6 6. Bg5 Nf6 7. Nd8 g6 8. Bc4 d5 9. Ne6 Bh6 10. Bb5 c6 11. Bxc6 Nb4 12. Na3 Rh7 13. e5 Bxg5 14. Nf8 Be6 15. Nb5 f4 16. a3 Bg4 17. f3 Nc6 18. c4 Nb4 19. Nc7 Kd8 20. axb4 a5 21. cxd5 Ra6 22. Nxa6 Be6 23. Nxe6 Ke8 24. Qa4 - Nov 01 21:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Ra6 22. Nxa6 Be6 23. Nxe6 Ke8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Na6 6. Bg5 Nf6 7. Nd8 g6 8. Bc4 d5 9. Ne6 Bh6 10. Bb5 c6 11. Bxc6 Nb4 12. Na3 Rh7 13. e5 Bxg5 14. Nf8 Be6 15. Nb5 f4 16. a3 Bg4 17. f3 Nc6 18. c4 Nb4 19. Nc7 Kd8 20. axb4 a5 21. cxd5 Ra6 22. Nxa6 Be6 23. Nxe6 Ke8