85.3M
positions
16.3M
practically solved
312.28T
engine nodes
2.4M
analyses
14
in queue
5
active workers
28
active cores
7.6M
nodes / sec
6.8
positions / min
109
proof number
4,657
disproof number
Root conquest: 0/20 first moves solved · 19.1% of tree positions solved · last 24h: 106,553 closures, 2.43T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 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 2.3m (median of 9) · measured at 2026-10-16 13:00 UTC
Closures by source, last 24h (106553 of 106553 labelled): USER 72.8% (77588) · FILL 1.6% (1749) · AUTO 25.5% (27160) · SOLVE 0.0% (0) · NONE 0.1% (56) · last 7d (837881 of 837881): USER 91.0% (762590) · FILL 0.7% (5674) · AUTO 8.2% (69122) · SOLVE 0.0% (0) · NONE 0.1% (495). 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 … Rf8 24. Rg1 a5 25. Rc1 Rd8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Rf8 24. Rg1 a5 25. Rc1 Rb8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … Rf8 24. Rg1 a5 25. Rc1 Re8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 d6 2. Ng5 f5 … Rf8 24. Rg1 a5 25. Rc1 Rc8 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nh3 d5 2. Nc3 h6 … Nf6 15. h4 Nd5 16. c4 Rd8 (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 | 1129 | 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 59.1% of the fleet | 1.44T | 15,213 |
| 2 | RickEdinson 17.8% of the fleet | 431.52B | 4,185 |
| 3 | MoNiKaMaDnEsS 14.8% of the fleet | 360.28B | 3,331 |
| 4 | randomchampgamer 8.3% of the fleet | 202.23B | 1,190 |
4 accounts · 2.43T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 28.9% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 16.7% of the fleet | 52.19T | 369,982 |
| 3 | tenzink 13.7% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.1% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 6.4% 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 | 13.95T | 94,002 |
| 8 | JackIV 3.2% of the fleet | 10.06T | 67,859 |
| 9 | MoNiKaMaDnEsS 2.6% of the fleet | 8.22T | 56,311 |
| 10 | gannet 2.3% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 312.34T 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 16 13:42 Solved: WHITE_WIN via MINIMAXview
deep line, ply ≥46 · … Rg1 a5 Rc1 e6
deep line, ply ≥46 · … Rg1 a5 Rc1 e6 - Oct 16 13:42 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥66 · … Rc8 Kh7 Qd3 axb2
deep line, ply ≥66 · … Rc8 Kh7 Qd3 axb2 - Oct 16 13:42 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥65 · … a3 Rc8 Kh7 Qd3
deep line, ply ≥65 · … a3 Rc8 Kh7 Qd3 - Oct 16 13:42 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥64 · … Qxe7 a3 Rc8 Kh7
deep line, ply ≥64 · … Qxe7 a3 Rc8 Kh7 - Oct 16 13:42 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥63 · … Rf8 Qxe7 a3 Rc8
deep line, ply ≥63 · … Rf8 Qxe7 a3 Rc8 - Oct 16 13:42 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥62 · … Bf7 Rf8 Qxe7 a3
deep line, ply ≥62 · … Bf7 Rf8 Qxe7 a3 - Oct 16 13:42 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥61 · … a4 Bf7 Rf8 Qxe7
deep line, ply ≥61 · … a4 Bf7 Rf8 Qxe7 - Oct 16 13:42 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥60 · … Nf3 a4 Bf7 Rf8
deep line, ply ≥60 · … Nf3 a4 Bf7 Rf8 - Oct 16 13:42 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥59 · … Rg8 Nf3 a4 Bf7
deep line, ply ≥59 · … Rg8 Nf3 a4 Bf7 - Oct 16 13:42 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥58 · … Qc7 Rg8 Nf3 a4
deep line, ply ≥58 · … Qc7 Rg8 Nf3 a4 - Oct 16 13:42 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥57 · … Ne7 Qc7 Rg8 Nf3
deep line, ply ≥57 · … Ne7 Qc7 Rg8 Nf3 - Oct 16 13:42 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥56 · … c8=Q Ne7 Qc7 Rg8
deep line, ply ≥56 · … c8=Q Ne7 Qc7 Rg8