81.1M
positions
15.6M
practically solved
295.72T
engine nodes
2.3M
analyses
184
in queue
13
active workers
66
active cores
17.9M
nodes / sec
30.2
positions / min
82
proof number
4,106
disproof number
Root conquest: 0/20 first moves solved · 19.3% of tree positions solved · last 24h: 86,075 closures, 5.03T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 over 219 open obligations, of which 41 (18.7%) 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 13.7h (median of 3) · measured at 2026-10-11 03:00 UTC
Closures by source, last 24h (86072 of 86072 labelled): USER 99.9% (86010) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.1% (62) · last 7d (1657969 of 1657972): USER 99.0% (1642203) · FILL 0.1% (2071) · AUTO 0.7% (11952) · SOLVE 0.0% (0) · NONE 0.1% (1743). 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. Nc3 Nh6 … 16. Bxh3 Nd7 17. Rh7 Ne5 18. Re7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 Nh6 … Qg6 15. Qxh7 Bh3 16. Bxh3 Nd7 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 Nh6 … 17. Rh7 Ne5 18. Re7 Kf8 19. Bh6 (User) · 128.0M nodes · MoNiKaMaDnEsS-DESKTOP-VG9VPVH-atomicdb
- 1. Nf3 f6 2. Nc3 Nh6 … Ne5 18. Re7 Kf8 19. Bh6 Kg8 (User) · 128.0M nodes · randomchampgamer-2026PC-atomicdb
- 1. Nf3 f6 2. Nc3 Nh6 … 11. dxe5 Be6 12. Qe5 Qe7 13. Qf6 (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 | 1076 | 2 | |
| g1h3 | unsolved | 821 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| e2e4 | unsolved | 400 | 2 | |
| d2d4 | unsolved | 387 | 2 | |
| b1c3 | unsolved | 127 | 2 | |
| b1a3 | unsolved | 0 | 3 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| 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 | Torom 45.0% of the fleet | 2.26T | 14,797 |
| 2 | BManBJ 25.9% of the fleet | 1.30T | 6,388 |
| 3 | randomchampgamer 12.7% of the fleet | 639.64B | 2,553 |
| 4 | RickEdinson 8.3% of the fleet | 415.66B | 1,847 |
| 5 | MoNiKaMaDnEsS 8.1% of the fleet | 409.25B | 1,845 |
| 6 | soothdest <0.1% of the fleet | 25.3M | 4 |
6 accounts · 5.03T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 30.5% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 15.5% of the fleet | 45.91T | 317,939 |
| 3 | tenzink 14.5% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.6% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 6.0% of the fleet | 17.67T | 127,097 |
| 6 | RickEdinson 4.0% of the fleet | 11.73T | 77,089 |
| 7 | Torom 3.9% of the fleet | 11.52T | 83,279 |
| 8 | JackIV 3.4% 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 | 6.72T | 44,519 |
and 25 more.
35 accounts · 295.97T 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 · 17 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 11 03:57 Solved: WHITE_WIN via MATE_PVview
1. g4 e6 2. Nf3 f6 … Be6 12. Qe5 Qe7 13. Qc7 Qg7
1. g4 e6 2. Nf3 f6 3. Nc3 c6 4. d4 Nh6 5. e4 Bb4 6. e5 fxe5 7. Ng5 d5 8. h4 e5 9. Qe2 Nxg4 10. f3 g5 11. dxe5 Be6 12. Qe5 Qe7 13. Qc7 Qg7 - Oct 11 03:57 Solved: WHITE_WIN via MATE_PVview
1. g4 e6 2. Nf3 f6 … Be6 12. Qe5 Qe7 13. Qc7 Qc5
1. g4 e6 2. Nf3 f6 3. Nc3 c6 4. d4 Nh6 5. e4 Bb4 6. e5 fxe5 7. Ng5 d5 8. h4 e5 9. Qe2 Nxg4 10. f3 g5 11. dxe5 Be6 12. Qe5 Qe7 13. Qc7 Qc5 - Oct 11 03:57 Solved: WHITE_WIN via MATE_PVview
1. g4 e6 2. Nf3 f6 … Be6 12. Qe5 Qe7 13. Qc7 Qd6
1. g4 e6 2. Nf3 f6 3. Nc3 c6 4. d4 Nh6 5. e4 Bb4 6. e5 fxe5 7. Ng5 d5 8. h4 e5 9. Qe2 Nxg4 10. f3 g5 11. dxe5 Be6 12. Qe5 Qe7 13. Qc7 Qd6 - Oct 11 03:57 Solved: WHITE_WIN via MATE_PVview
1. g4 e6 2. Nf3 f6 … Ke7 28. Re1 Be5 29. Nd5 Kd6
1. g4 e6 2. Nf3 f6 3. Nc3 c6 4. d4 Nh6 5. e4 Bb4 6. e5 fxe5 7. Ng5 d5 8. h4 e5 9. Qe2 Nxg4 10. f3 g5 11. dxe5 Be6 12. Qe5 Qe7 13. Qc7 O-O 14. Qxe7 Na6 15. hxg5 Kf7 16. Rg1 Re8 17. Be3 Re4 18. Rg7 Ke8 19. Rg8 Ke7 20. Bh3 Rf4 21. Rg7 Kd8 22. Bxf4 d4 23. Kf1 Bd6 24. Rd7 Ke8 25. Re7 Kf8 26. Rf7 Ke8 27. Rf8 Ke7 28. Re1 Be5 29. Nd5 Kd6 - Oct 11 03:57 Solved: WHITE_WIN via MATE_PVview
1. g4 e6 2. Nf3 f6 … 27. Rf8 Ke7 28. Re1 Be5 29. Nd5
1. g4 e6 2. Nf3 f6 3. Nc3 c6 4. d4 Nh6 5. e4 Bb4 6. e5 fxe5 7. Ng5 d5 8. h4 e5 9. Qe2 Nxg4 10. f3 g5 11. dxe5 Be6 12. Qe5 Qe7 13. Qc7 O-O 14. Qxe7 Na6 15. hxg5 Kf7 16. Rg1 Re8 17. Be3 Re4 18. Rg7 Ke8 19. Rg8 Ke7 20. Bh3 Rf4 21. Rg7 Kd8 22. Bxf4 d4 23. Kf1 Bd6 24. Rd7 Ke8 25. Re7 Kf8 26. Rf7 Ke8 27. Rf8 Ke7 28. Re1 Be5 29. Nd5 - Oct 11 03:57 Solved: WHITE_WIN via MATE_PVview
1. g4 e6 2. Nf3 f6 … Ke8 27. Rf8 Ke7 28. Re1 Be5
1. g4 e6 2. Nf3 f6 3. Nc3 c6 4. d4 Nh6 5. e4 Bb4 6. e5 fxe5 7. Ng5 d5 8. h4 e5 9. Qe2 Nxg4 10. f3 g5 11. dxe5 Be6 12. Qe5 Qe7 13. Qc7 O-O 14. Qxe7 Na6 15. hxg5 Kf7 16. Rg1 Re8 17. Be3 Re4 18. Rg7 Ke8 19. Rg8 Ke7 20. Bh3 Rf4 21. Rg7 Kd8 22. Bxf4 d4 23. Kf1 Bd6 24. Rd7 Ke8 25. Re7 Kf8 26. Rf7 Ke8 27. Rf8 Ke7 28. Re1 Be5 - Oct 11 03:57 Solved: WHITE_WIN via MATE_PVview
1. g4 e6 2. Nf3 f6 … 26. Rf7 Ke8 27. Rf8 Ke7 28. Re1
1. g4 e6 2. Nf3 f6 3. Nc3 c6 4. d4 Nh6 5. e4 Bb4 6. e5 fxe5 7. Ng5 d5 8. h4 e5 9. Qe2 Nxg4 10. f3 g5 11. dxe5 Be6 12. Qe5 Qe7 13. Qc7 O-O 14. Qxe7 Na6 15. hxg5 Kf7 16. Rg1 Re8 17. Be3 Re4 18. Rg7 Ke8 19. Rg8 Ke7 20. Bh3 Rf4 21. Rg7 Kd8 22. Bxf4 d4 23. Kf1 Bd6 24. Rd7 Ke8 25. Re7 Kf8 26. Rf7 Ke8 27. Rf8 Ke7 28. Re1 - Oct 11 03:57 Solved: WHITE_WIN via MATE_PVview
1. g4 e6 2. Nf3 f6 … Kf8 26. Rf7 Ke8 27. Rf8 Ke7
1. g4 e6 2. Nf3 f6 3. Nc3 c6 4. d4 Nh6 5. e4 Bb4 6. e5 fxe5 7. Ng5 d5 8. h4 e5 9. Qe2 Nxg4 10. f3 g5 11. dxe5 Be6 12. Qe5 Qe7 13. Qc7 O-O 14. Qxe7 Na6 15. hxg5 Kf7 16. Rg1 Re8 17. Be3 Re4 18. Rg7 Ke8 19. Rg8 Ke7 20. Bh3 Rf4 21. Rg7 Kd8 22. Bxf4 d4 23. Kf1 Bd6 24. Rd7 Ke8 25. Re7 Kf8 26. Rf7 Ke8 27. Rf8 Ke7 - Oct 11 03:57 Solved: WHITE_WIN via MATE_PVview
1. g4 e6 2. Nf3 f6 … 25. Re7 Kf8 26. Rf7 Ke8 27. Rf8
1. g4 e6 2. Nf3 f6 3. Nc3 c6 4. d4 Nh6 5. e4 Bb4 6. e5 fxe5 7. Ng5 d5 8. h4 e5 9. Qe2 Nxg4 10. f3 g5 11. dxe5 Be6 12. Qe5 Qe7 13. Qc7 O-O 14. Qxe7 Na6 15. hxg5 Kf7 16. Rg1 Re8 17. Be3 Re4 18. Rg7 Ke8 19. Rg8 Ke7 20. Bh3 Rf4 21. Rg7 Kd8 22. Bxf4 d4 23. Kf1 Bd6 24. Rd7 Ke8 25. Re7 Kf8 26. Rf7 Ke8 27. Rf8 - Oct 11 03:57 Solved: WHITE_WIN via MATE_PVview
1. g4 e6 2. Nf3 f6 … Ke8 25. Re7 Kf8 26. Rf7 Ke8
1. g4 e6 2. Nf3 f6 3. Nc3 c6 4. d4 Nh6 5. e4 Bb4 6. e5 fxe5 7. Ng5 d5 8. h4 e5 9. Qe2 Nxg4 10. f3 g5 11. dxe5 Be6 12. Qe5 Qe7 13. Qc7 O-O 14. Qxe7 Na6 15. hxg5 Kf7 16. Rg1 Re8 17. Be3 Re4 18. Rg7 Ke8 19. Rg8 Ke7 20. Bh3 Rf4 21. Rg7 Kd8 22. Bxf4 d4 23. Kf1 Bd6 24. Rd7 Ke8 25. Re7 Kf8 26. Rf7 Ke8 - Oct 11 03:57 Solved: WHITE_WIN via MATE_PVview
1. g4 e6 2. Nf3 f6 … 24. Rd7 Ke8 25. Re7 Kf8 26. Rf7
1. g4 e6 2. Nf3 f6 3. Nc3 c6 4. d4 Nh6 5. e4 Bb4 6. e5 fxe5 7. Ng5 d5 8. h4 e5 9. Qe2 Nxg4 10. f3 g5 11. dxe5 Be6 12. Qe5 Qe7 13. Qc7 O-O 14. Qxe7 Na6 15. hxg5 Kf7 16. Rg1 Re8 17. Be3 Re4 18. Rg7 Ke8 19. Rg8 Ke7 20. Bh3 Rf4 21. Rg7 Kd8 22. Bxf4 d4 23. Kf1 Bd6 24. Rd7 Ke8 25. Re7 Kf8 26. Rf7 - Oct 11 03:57 Solved: WHITE_WIN via MATE_PVview
1. g4 e6 2. Nf3 f6 … Bd6 24. Rd7 Ke8 25. Re7 Kf8
1. g4 e6 2. Nf3 f6 3. Nc3 c6 4. d4 Nh6 5. e4 Bb4 6. e5 fxe5 7. Ng5 d5 8. h4 e5 9. Qe2 Nxg4 10. f3 g5 11. dxe5 Be6 12. Qe5 Qe7 13. Qc7 O-O 14. Qxe7 Na6 15. hxg5 Kf7 16. Rg1 Re8 17. Be3 Re4 18. Rg7 Ke8 19. Rg8 Ke7 20. Bh3 Rf4 21. Rg7 Kd8 22. Bxf4 d4 23. Kf1 Bd6 24. Rd7 Ke8 25. Re7 Kf8