81.6M
positions
15.7M
practically solved
297.07T
engine nodes
2.3M
analyses
1
in queue
6
active workers
34
active cores
5.0M
nodes / sec
6.7
positions / min
85
proof number
4,552
disproof number
Root conquest: 0/20 first moves solved · 19.2% of tree positions solved · last 24h: 97,658 closures, 4.97T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 70 over 218 open obligations, of which 41 (18.8%) 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 36s (median of 2) · measured at 2026-10-11 12:00 UTC
Closures by source, last 24h (97658 of 97658 labelled): USER 82.0% (80043) · FILL 0.6% (625) · AUTO 17.3% (16931) · SOLVE 0.0% (0) · NONE 0.1% (59) · last 7d (1649150 of 1649150): USER 98.0% (1616207) · FILL 0.2% (2696) · AUTO 1.8% (28883) · SOLVE 0.0% (0) · NONE 0.1% (1364). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nf3 d6 2. Ng5 f5 … Ra8 15. Bb5 h4 16. Be8 Rc8 (User) · 512.0M nodes · BManBJ-Blake-atomicdb
- deep line, ply ≥51 · … Bc1 h3 Kh8 Re5 (Fill) · 512.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nh3 d5 2. Nc3 h6 … Qxb5 14. a4 Bh6 15. Bxh6 dxe4 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#2
- deep line, ply ≥51 · … Be3 Re5 Bh6 Rf5 (Fill) · 2.00B nodes · BManBJ-Laptop-Blake-atomicdb
- deep line, ply ≥54 · … Kh8 Rb5 Bh6 Rd5 (Fill) · 512.0M 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 | 1016 | 2 | |
| g1h3 | unsolved | 753 | 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 52.8% of the fleet | 2.62T | 18,593 |
| 2 | BManBJ 23.3% of the fleet | 1.16T | 9,212 |
| 3 | randomchampgamer 11.7% of the fleet | 580.08B | 3,704 |
| 4 | RickEdinson 7.6% of the fleet | 376.59B | 2,903 |
| 5 | MoNiKaMaDnEsS 4.7% of the fleet | 235.46B | 2,070 |
| 6 | soothdest <0.1% of the fleet | 25.3M | 4 |
6 accounts · 4.97T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 30.4% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 15.6% of the fleet | 46.32T | 323,323 |
| 3 | tenzink 14.4% 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 | 17.86T | 129,133 |
| 6 | Torom 4.0% of the fleet | 11.88T | 87,075 |
| 7 | RickEdinson 4.0% of the fleet | 11.85T | 78,756 |
| 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 | 6.80T | 46,031 |
and 25 more.
35 accounts · 297.15T 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 11 12:47 Solved: WHITE_WIN via MINIMAXview
deep line, ply ≥28 · … Bb5 h4 Be8 f3
deep line, ply ≥28 · … Bb5 h4 Be8 f3 - Oct 11 12:47 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥42 · … O-O-O Rf5 Qh6 Kg8
deep line, ply ≥42 · … O-O-O Rf5 Qh6 Kg8 - Oct 11 12:47 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥41 · … fxg2 O-O-O Rf5 Qh6
deep line, ply ≥41 · … fxg2 O-O-O Rf5 Qh6 - Oct 11 12:47 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥40 · … Qg5 fxg2 O-O-O Rf5
deep line, ply ≥40 · … Qg5 fxg2 O-O-O Rf5 - Oct 11 12:47 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥39 · … Rf8 Qg5 fxg2 O-O-O
deep line, ply ≥39 · … Rf8 Qg5 fxg2 O-O-O - Oct 11 12:47 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥38 · … Qb5 Rf8 Qg5 fxg2
deep line, ply ≥38 · … Qb5 Rf8 Qg5 fxg2 - Oct 11 12:47 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥37 · … e6 Qb5 Rf8 Qg5
deep line, ply ≥37 · … e6 Qb5 Rf8 Qg5 - Oct 11 12:47 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥36 · … Bxd5 e6 Qb5 Rf8
deep line, ply ≥36 · … Bxd5 e6 Qb5 Rf8 - Oct 11 12:47 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥35 · … Kh8 Bxd5 e6 Qb5
deep line, ply ≥35 · … Kh8 Bxd5 e6 Qb5 - Oct 11 12:47 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥34 · … Bf7 Kh8 Bxd5 e6
deep line, ply ≥34 · … Bf7 Kh8 Bxd5 e6 - Oct 11 12:47 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥33 · … Nd5 Bf7 Kh8 Bxd5
deep line, ply ≥33 · … Nd5 Bf7 Kh8 Bxd5 - Oct 11 12:47 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥32 · … exd5 Nd5 Bf7 Kh8
deep line, ply ≥32 · … exd5 Nd5 Bf7 Kh8