83.9M
positions
16.0M
practically solved
308.54T
engine nodes
2.3M
analyses
55
in queue
5
active workers
34
active cores
15.0M
nodes / sec
11.5
positions / min
58
proof number
4,548
disproof number
Root conquest: 0/20 first moves solved · 19.1% of tree positions solved · last 24h: 102,822 closures, 1.83T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 over 216 open obligations, of which 40 (18.5%) 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 2.2m (median of 30) · measured at 2026-10-15 01:00 UTC
Closures by source, last 24h (102776 of 102776 labelled): USER 92.0% (94603) · FILL 1.2% (1222) · AUTO 6.6% (6819) · SOLVE 0.0% (0) · NONE 0.1% (132) · last 7d (999159 of 999205): USER 95.9% (958654) · FILL 0.4% (3708) · AUTO 3.6% (36291) · SOLVE 0.0% (0) · NONE 0.1% (506). 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 … Kh8 22. Kh1 e6 23. c4 Kg7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … f5 8. exf5 d6 9. O-O d5 (Fill) · 2.00B nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … e6 23. c4 Rf8 24. Rc1 Rb8 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … g4 15. c4 e5 16. Rd1 d6 (Fill) · 2.00B 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 | 1101 | 2 | |
| g1h3 | unsolved | 703 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| e2e4 | unsolved | 400 | 2 | |
| d2d4 | unsolved | 395 | 2 | |
| b1c3 | unsolved | 127 | 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 | randomchampgamer 36.5% of the fleet | 668.75B | 3,712 |
| 2 | MoNiKaMaDnEsS 22.6% of the fleet | 415.09B | 2,360 |
| 3 | RickEdinson 21.5% of the fleet | 394.18B | 2,596 |
| 4 | BManBJ 19.4% of the fleet | 355.79B | 3,964 |
4 accounts · 1.83T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 29.3% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 16.2% of the fleet | 50.10T | 347,362 |
| 3 | tenzink 13.9% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.2% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 6.3% of the fleet | 19.36T | 136,946 |
| 6 | Torom 5.1% of the fleet | 15.70T | 113,354 |
| 7 | RickEdinson 4.3% of the fleet | 13.32T | 87,646 |
| 8 | JackIV 3.3% of the fleet | 10.06T | 67,859 |
| 9 | MoNiKaMaDnEsS 2.5% of the fleet | 7.71T | 51,450 |
| 10 | gannet 2.3% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 308.61T 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 15 01:52 Solved: WHITE_WIN via MINIMAXview
deep line, ply ≥42 · … Kh1 e6 c4 Rc8
deep line, ply ≥42 · … Kh1 e6 c4 Rc8 - Oct 15 01:52 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥68 · … Qe6 Rxe6 Rc8 Kg7
deep line, ply ≥68 · … Qe6 Rxe6 Rc8 Kg7 - Oct 15 01:52 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥67 · … Re8 Qe6 Rxe6 Rc8
deep line, ply ≥67 · … Re8 Qe6 Rxe6 Rc8 - Oct 15 01:52 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥66 · … Qc8 Re8 Qe6 Rxe6
deep line, ply ≥66 · … Qc8 Re8 Qe6 Rxe6 - Oct 15 01:52 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥65 · … Re7 Qc8 Re8 Qe6
deep line, ply ≥65 · … Re7 Qc8 Re8 Qe6 - Oct 15 01:52 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥64 · … g3 Re7 Qc8 Re8
deep line, ply ≥64 · … g3 Re7 Qc8 Re8 - Oct 15 01:52 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥63 · … f3 g3 Re7 Qc8
deep line, ply ≥63 · … f3 g3 Re7 Qc8 - Oct 15 01:52 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥62 · … Qd7 f3 g3 Re7
deep line, ply ≥62 · … Qd7 f3 g3 Re7 - Oct 15 01:52 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥61 · … a3 Qd7 f3 g3
deep line, ply ≥61 · … a3 Qd7 f3 g3 - Oct 15 01:52 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥60 · … c8=Q a3 Qd7 f3
deep line, ply ≥60 · … c8=Q a3 Qd7 f3 - Oct 15 01:52 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥59 · … b3 c8=Q a3 Qd7
deep line, ply ≥59 · … b3 c8=Q a3 Qd7 - Oct 15 01:52 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥58 · … c7 b3 c8=Q a3
deep line, ply ≥58 · … c7 b3 c8=Q a3