88.4M
positions
16.8M
practically solved
326.03T
engine nodes
2.5M
analyses
49
in queue
13
active workers
60
active cores
22.3M
nodes / sec
29.8
positions / min
143
proof number
4,659
disproof number
Root conquest: 0/20 first moves solved · 19.1% of tree positions solved · last 24h: 327,644 closures, 6.02T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 70 over 204 open obligations, of which 37 (18.1%) 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 3.2m (median of 102) · measured at 2026-10-19 14:00 UTC
Closures by source, last 24h (327513 of 327613 labelled): USER 98.6% (323066) · FILL 0.3% (978) · AUTO 0.3% (1002) · SOLVE 0.0% (0) · NONE 0.8% (2467) · last 7d (977939 of 977970): USER 92.1% (900239) · FILL 0.8% (7588) · AUTO 6.9% (67149) · SOLVE 0.0% (0) · NONE 0.3% (2963). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nh3 f5 2. Ng5 d6 … Ng8 16. Be8 d5 17. Nb5 Ne7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nh3 f5 2. Ng5 d6 … Ng8 16. Be8 d5 17. Nb5 Rd8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nh3 f5 2. Ng5 d6 … Ng8 16. Be8 d5 17. Nb5 Ra7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nh3 f5 2. Ng5 d6 … Ng8 16. Be8 d5 17. Nb5 Rb8 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. Na3 g5 (User) · 10.00B 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 | 1089 | 2 | |
| g1h3 | unsolved | 821 | 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 | Torom 62.0% of the fleet | 3.73T | 26,984 |
| 2 | BManBJ 27.2% of the fleet | 1.64T | 12,197 |
| 3 | RickEdinson 7.6% of the fleet | 456.28B | 3,042 |
| 4 | MoNiKaMaDnEsS 2.7% of the fleet | 163.62B | 1,248 |
| 5 | soothdest 0.5% of the fleet | 29.81B | 189 |
5 accounts · 6.02T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 27.7% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 17.4% of the fleet | 56.90T | 400,842 |
| 3 | tenzink 13.1% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 9.6% of the fleet | 31.40T | 228,002 |
| 5 | Torom 7.0% of the fleet | 22.81T | 162,856 |
| 6 | randomchampgamer 6.1% of the fleet | 19.85T | 140,897 |
| 7 | RickEdinson 4.7% of the fleet | 15.39T | 102,739 |
| 8 | JackIV 3.1% of the fleet | 10.06T | 67,859 |
| 9 | MoNiKaMaDnEsS 2.7% of the fleet | 8.70T | 59,907 |
| 10 | gannet 2.2% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 326.11T 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 19 14:23 Solved: WHITE_WIN via MINIMAXview
deep line, ply ≥28 · … Nc3 Nh7 Nd5 e5
deep line, ply ≥28 · … Nc3 Nh7 Nd5 e5 - Oct 19 14:23 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥50 · … Rh7 Kg5 Rh5 Kf4
deep line, ply ≥50 · … Rh7 Kg5 Rh5 Kf4 - Oct 19 14:23 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥49 · … Kh4 Rh7 Kg5 Rh5
deep line, ply ≥49 · … Kh4 Rh7 Kg5 Rh5 - Oct 19 14:23 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥48 · … Rg7 Kh4 Rh7 Kg5
deep line, ply ≥48 · … Rg7 Kh4 Rh7 Kg5 - Oct 19 14:23 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥47 · … Kg5 Rg7 Kh4 Rh7
deep line, ply ≥47 · … Kg5 Rg7 Kh4 Rh7 - Oct 19 14:23 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥46 · … Rc7 Kg5 Rg7 Kh4
deep line, ply ≥46 · … Rc7 Kg5 Rg7 Kh4 - Oct 19 14:23 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥45 · … hxg3 Rc7 Kg5 Rg7
deep line, ply ≥45 · … hxg3 Rc7 Kg5 Rg7 - Oct 19 14:23 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥44 · … cxd6 hxg3 Rc7 Kg5
deep line, ply ≥44 · … cxd6 hxg3 Rc7 Kg5 - Oct 19 14:23 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥43 · … Kh6 cxd6 hxg3 Rc7
deep line, ply ≥43 · … Kh6 cxd6 hxg3 Rc7 - Oct 19 14:23 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥42 · … c5 Kh6 cxd6 hxg3
deep line, ply ≥42 · … c5 Kh6 cxd6 hxg3 - Oct 19 14:23 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥41 · … h4 c5 Kh6 cxd6
deep line, ply ≥41 · … h4 c5 Kh6 cxd6 - Oct 19 14:23 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥40 · … g3 h4 c5 Kh6
deep line, ply ≥40 · … g3 h4 c5 Kh6