83.2M
positions
15.9M
practically solved
304.82T
engine nodes
2.3M
analyses
12
in queue
14
active workers
74
active cores
37.1M
nodes / sec
35.9
positions / min
85
proof number
4,551
disproof number
Root conquest: 0/20 first moves solved · 19.1% of tree positions solved · last 24h: 110,947 closures, 3.35T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 70 over 216 open obligations, of which 41 (19.0%) 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 59s (median of 3) · measured at 2026-10-13 11:00 UTC
Closures by source, last 24h (110947 of 110947 labelled): USER 99.5% (110383) · FILL 0.4% (487) · AUTO 0.0% (16) · SOLVE 0.0% (0) · NONE 0.1% (61) · last 7d (1367757 of 1367757): USER 97.6% (1334724) · FILL 0.2% (3129) · AUTO 2.2% (29497) · SOLVE 0.0% (0) · NONE 0.0% (407). 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 … 12. d5 Qb7 13. Qe3 Bc5 14. Nc4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nh3 d5 2. Nc3 h6 … 17. Qg5 Qxg5 18. e4 g5 19. Rb1 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nh3 d5 2. Nc3 h6 … 14. h3 O-O-O 15. a4 Kb8 16. a5 (User) · 512.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … 5. Bb5 c6 6. exf5 e5 7. c3 (User) · 128.0M nodes · MoNiKaMaDnEsS-DESKTOP-VG9VPVH-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … 5. Bb5 c6 6. exf5 e5 7. d3 (User) · 128.0M nodes · randomchampgamer-2026PC-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 | 1050 | 2 | |
| g1h3 | unsolved | 753 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| e2e4 | unsolved | 400 | 2 | |
| d2d4 | unsolved | 393 | 2 | |
| b1c3 | unsolved | 127 | 2 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b1a3 | unsolved | 0 | 3 | |
| 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 | BManBJ 40.8% of the fleet | 1.37T | 8,511 |
| 2 | Torom 31.5% of the fleet | 1.05T | 7,270 |
| 3 | RickEdinson 12.9% of the fleet | 433.20B | 2,732 |
| 4 | MoNiKaMaDnEsS 9.8% of the fleet | 328.22B | 2,166 |
| 5 | randomchampgamer 5.0% of the fleet | 167.54B | 1,018 |
5 accounts · 3.35T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 29.6% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 16.0% of the fleet | 48.93T | 339,471 |
| 3 | tenzink 14.0% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.3% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 6.0% of the fleet | 18.33T | 131,759 |
| 6 | Torom 5.1% of the fleet | 15.46T | 112,118 |
| 7 | RickEdinson 4.2% of the fleet | 12.69T | 83,881 |
| 8 | JackIV 3.3% of the fleet | 10.06T | 67,859 |
| 9 | gannet 2.4% of the fleet | 7.24T | 46,848 |
| 10 | MoNiKaMaDnEsS 2.4% of the fleet | 7.18T | 48,584 |
and 25 more.
35 accounts · 305.02T 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 13 11:43 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … Kd8 12. Qa4 Kc7 13. Qd7 Kb6
1. Nf3 f6 2. e4 c6 3. Nc3 g6 4. Nd5 cxd5 5. d4 d6 6. Ng5 Bg4 7. f3 fxg5 8. Bg5 Nf6 9. Bc4 Qa5 10. c3 h6 11. Bf7 Kd8 12. Qa4 Kc7 13. Qd7 Kb6 - Oct 13 11:43 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … 11. Bf7 Kd8 12. Qa4 Kc7 13. Qd7
1. Nf3 f6 2. e4 c6 3. Nc3 g6 4. Nd5 cxd5 5. d4 d6 6. Ng5 Bg4 7. f3 fxg5 8. Bg5 Nf6 9. Bc4 Qa5 10. c3 h6 11. Bf7 Kd8 12. Qa4 Kc7 13. Qd7 - Oct 13 11:43 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … h6 11. Bf7 Kd8 12. Qa4 Kc7
1. Nf3 f6 2. e4 c6 3. Nc3 g6 4. Nd5 cxd5 5. d4 d6 6. Ng5 Bg4 7. f3 fxg5 8. Bg5 Nf6 9. Bc4 Qa5 10. c3 h6 11. Bf7 Kd8 12. Qa4 Kc7 - Oct 13 11:43 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … Bh6 9. Ng5 Na6 10. Nxh7 Kf8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 g6 7. Nc3 Bg4 8. f3 Bh6 9. Ng5 Na6 10. Nxh7 Kf8 - Oct 13 11:43 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Nf6 16. Qh3 Ng4 17. Qh7 Kf8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 g6 7. Nc3 Bg4 8. f3 Bh6 9. Ng5 Na6 10. Nxh7 Kf8 11. Nd5 Kg8 12. fxg4 Rf8 13. Nxe7 Nc5 14. Qf3 Ne4 15. d3 Nf6 16. Qh3 Ng4 17. Qh7 Kf8 - Oct 13 11:43 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 15. d3 Nf6 16. Qh3 Ng4 17. Qh7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 g6 7. Nc3 Bg4 8. f3 Bh6 9. Ng5 Na6 10. Nxh7 Kf8 11. Nd5 Kg8 12. fxg4 Rf8 13. Nxe7 Nc5 14. Qf3 Ne4 15. d3 Nf6 16. Qh3 Ng4 17. Qh7 - Oct 13 11:43 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Ne4 15. d3 Nf6 16. Qh3 Ng4
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 g6 7. Nc3 Bg4 8. f3 Bh6 9. Ng5 Na6 10. Nxh7 Kf8 11. Nd5 Kg8 12. fxg4 Rf8 13. Nxe7 Nc5 14. Qf3 Ne4 15. d3 Nf6 16. Qh3 Ng4 - Oct 13 11:43 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 14. Qf3 Ne4 15. d3 Nf6 16. Qh3
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 g6 7. Nc3 Bg4 8. f3 Bh6 9. Ng5 Na6 10. Nxh7 Kf8 11. Nd5 Kg8 12. fxg4 Rf8 13. Nxe7 Nc5 14. Qf3 Ne4 15. d3 Nf6 16. Qh3 - Oct 13 11:43 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Nc5 14. Qf3 Ne4 15. d3 Nf6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 g6 7. Nc3 Bg4 8. f3 Bh6 9. Ng5 Na6 10. Nxh7 Kf8 11. Nd5 Kg8 12. fxg4 Rf8 13. Nxe7 Nc5 14. Qf3 Ne4 15. d3 Nf6 - Oct 13 11:43 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 13. Nxe7 Nc5 14. Qf3 Ne4 15. d3
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 g6 7. Nc3 Bg4 8. f3 Bh6 9. Ng5 Na6 10. Nxh7 Kf8 11. Nd5 Kg8 12. fxg4 Rf8 13. Nxe7 Nc5 14. Qf3 Ne4 15. d3 - Oct 13 11:43 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Rf8 13. Nxe7 Nc5 14. Qf3 Ne4
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 g6 7. Nc3 Bg4 8. f3 Bh6 9. Ng5 Na6 10. Nxh7 Kf8 11. Nd5 Kg8 12. fxg4 Rf8 13. Nxe7 Nc5 14. Qf3 Ne4 - Oct 13 11:43 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 12. fxg4 Rf8 13. Nxe7 Nc5 14. Qf3
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 g6 7. Nc3 Bg4 8. f3 Bh6 9. Ng5 Na6 10. Nxh7 Kf8 11. Nd5 Kg8 12. fxg4 Rf8 13. Nxe7 Nc5 14. Qf3