85.6M
positions
16.3M
practically solved
313.70T
engine nodes
2.4M
analyses
176
in queue
6
active workers
36
active cores
5.4M
nodes / sec
8.0
positions / min
151
proof number
4,667
disproof number
Root conquest: 0/20 first moves solved · 19.1% of tree positions solved · last 24h: 80,433 closures, 2.10T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 70 over 210 open obligations, of which 39 (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 26.6m (median of 18) · measured at 2026-10-17 05:00 UTC
Closures by source, last 24h (80418 of 80418 labelled): USER 64.4% (51809) · FILL 2.2% (1763) · AUTO 33.3% (26770) · SOLVE 0.0% (0) · NONE 0.1% (76) · last 7d (699143 of 699143): USER 87.4% (611262) · FILL 1.0% (6903) · AUTO 11.5% (80477) · SOLVE 0.0% (0) · NONE 0.1% (501). 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 … 19. d5 Be6 20. Kf2 a5 21. Ba6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … 19. a4 Rb8 20. Bxa6 Rc8 21. f7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. e4 e6 … 20. hxg5 Nb4 21. g5 Nd3 22. Bxd3 (User) · 512.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … Rh7 19. a4 Rb8 20. Bxa6 Rc8 (User) · 512.0M nodes · MoNiKaMaDnEsS-DESKTOP-VG9VPVH-atomicdb
- 1. Nf3 f6 2. e4 e6 … 19. a4 Rb8 20. hxg5 Nb4 21. g5 (User) · 512.0M 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 | 1159 | 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 61.2% of the fleet | 1.29T | 12,972 |
| 2 | RickEdinson 21.8% of the fleet | 457.83B | 3,934 |
| 3 | MoNiKaMaDnEsS 17.0% of the fleet | 357.46B | 3,135 |
3 accounts · 2.10T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 28.8% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 16.9% of the fleet | 53.02T | 376,366 |
| 3 | tenzink 13.7% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.0% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 6.3% of the fleet | 19.85T | 140,897 |
| 6 | Torom 5.0% of the fleet | 15.70T | 113,354 |
| 7 | RickEdinson 4.5% of the fleet | 14.27T | 96,266 |
| 8 | JackIV 3.2% of the fleet | 10.06T | 67,859 |
| 9 | MoNiKaMaDnEsS 2.7% of the fleet | 8.48T | 58,190 |
| 10 | gannet 2.3% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 313.75T 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 17 05:51 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Ka8 15. Ba6 bxa6 16. Qb3 Re8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 Bg6 9. f4 Rg8 10. O-O Nbd7 11. f5 e5 12. fxe6 O-O-O 13. Qe1 Kb8 14. Qe6 Ka8 15. Ba6 bxa6 16. Qb3 Re8 - Oct 17 05:51 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 14. Qe6 Ka8 15. Ba6 bxa6 16. Qb3
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 Bg6 9. f4 Rg8 10. O-O Nbd7 11. f5 e5 12. fxe6 O-O-O 13. Qe1 Kb8 14. Qe6 Ka8 15. Ba6 bxa6 16. Qb3 - Oct 17 05:51 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Kb8 14. Qe6 Ka8 15. Ba6 bxa6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 Bg6 9. f4 Rg8 10. O-O Nbd7 11. f5 e5 12. fxe6 O-O-O 13. Qe1 Kb8 14. Qe6 Ka8 15. Ba6 bxa6 - Oct 17 05:51 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 13. Qe1 Kb8 14. Qe6 Ka8 15. Ba6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 Bg6 9. f4 Rg8 10. O-O Nbd7 11. f5 e5 12. fxe6 O-O-O 13. Qe1 Kb8 14. Qe6 Ka8 15. Ba6 - Oct 17 05:51 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … O-O-O 13. Qe1 Kb8 14. Qe6 Ka8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 Bg6 9. f4 Rg8 10. O-O Nbd7 11. f5 e5 12. fxe6 O-O-O 13. Qe1 Kb8 14. Qe6 Ka8 - Oct 17 05:51 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 12. fxe6 O-O-O 13. Qe1 Kb8 14. Qe6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 Bg6 9. f4 Rg8 10. O-O Nbd7 11. f5 e5 12. fxe6 O-O-O 13. Qe1 Kb8 14. Qe6 - Oct 17 05:51 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … e5 12. fxe6 O-O-O 13. Qe1 Kb8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 Bg6 9. f4 Rg8 10. O-O Nbd7 11. f5 e5 12. fxe6 O-O-O 13. Qe1 Kb8 - Oct 17 05:51 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 11. f5 e5 12. fxe6 O-O-O 13. Qe1
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 Bg6 9. f4 Rg8 10. O-O Nbd7 11. f5 e5 12. fxe6 O-O-O 13. Qe1 - Oct 17 05:51 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Nbd7 11. f5 e5 12. fxe6 O-O-O
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 Bg6 9. f4 Rg8 10. O-O Nbd7 11. f5 e5 12. fxe6 O-O-O - Oct 17 05:51 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 10. O-O Nbd7 11. f5 e5 12. fxe6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 Bg6 9. f4 Rg8 10. O-O Nbd7 11. f5 e5 12. fxe6 - Oct 17 05:51 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Rg8 10. O-O Nbd7 11. f5 e5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 Bg6 9. f4 Rg8 10. O-O Nbd7 11. f5 e5 - Oct 17 05:51 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 9. f4 Rg8 10. O-O Nbd7 11. f5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 Bg6 9. f4 Rg8 10. O-O Nbd7 11. f5