94.4M
positions
19.3M
practically solved
343.37T
engine nodes
2.6M
analyses
94
in queue
6
active workers
36
active cores
47.4M
nodes / sec
24.7
positions / min
108
proof number
4,747
disproof number
Root conquest: 0/20 first moves solved · 20.5% of tree positions solved · last 24h: 1.1M closures, 6.44T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 70 over 210 open obligations, of which 40 (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 7.6m (median of 63) · measured at 2026-10-22 12:00 UTC
Closures by source, last 24h (1069064 of 1069147 labelled): USER 99.4% (1063019) · FILL 0.2% (2586) · AUTO 0.3% (3413) · SOLVE 0.0% (0) · NONE 0.0% (46) · last 7d (2979359 of 2979380): USER 97.9% (2916485) · FILL 0.4% (11324) · AUTO 1.6% (48687) · SOLVE 0.0% (0) · NONE 0.1% (2863). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- deep line, ply ≥29 · … c4 Kg8 c5 e6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- deep line, ply ≥29 · … c4 Kg8 c5 h4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- deep line, ply ≥29 · … c4 Kg8 c5 g5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- deep line, ply ≥29 · … c4 Kg8 c5 Ng4 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Bg7 10. Nxh8 Nbd7 11. O-O cxb5 (User) · 128.0M nodes · MoNiKaMaDnEsS-DESKTOP-VG9VPVH-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 | 1166 | 2 | |
| g1h3 | unsolved | 630 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 402 | 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 55.1% of the fleet | 3.55T | 26,470 |
| 2 | BManBJ 29.8% of the fleet | 1.92T | 15,139 |
| 3 | RickEdinson 7.7% of the fleet | 493.21B | 3,107 |
| 4 | MoNiKaMaDnEsS 6.9% of the fleet | 443.85B | 3,234 |
| 5 | soothdest 0.5% of the fleet | 33.49B | 199 |
5 accounts · 6.44T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 26.3% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 18.2% of the fleet | 62.35T | 442,678 |
| 3 | tenzink 12.5% of the fleet | 42.83T | 349,427 |
| 4 | Torom 9.4% of the fleet | 32.30T | 231,855 |
| 5 | auranvesdranor 9.1% of the fleet | 31.40T | 228,002 |
| 6 | randomchampgamer 5.8% of the fleet | 19.85T | 140,897 |
| 7 | RickEdinson 4.9% of the fleet | 16.76T | 110,841 |
| 8 | JackIV 2.9% of the fleet | 10.06T | 67,859 |
| 9 | MoNiKaMaDnEsS 2.8% of the fleet | 9.71T | 66,988 |
| 10 | gannet 2.1% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 343.48T 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 22 12:52 Solved: WHITE_WIN via MINIMAXview
deep line, ply ≥29 · … c4 Kg8 c5 Ne8
deep line, ply ≥29 · … c4 Kg8 c5 Ne8 - Oct 22 12:52 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥52 · … Qg8 Ke7 Qe8 Kd6
deep line, ply ≥52 · … Qg8 Ke7 Qe8 Kd6 - Oct 22 12:52 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥51 · … Kf7 Qg8 Ke7 Qe8
deep line, ply ≥51 · … Kf7 Qg8 Ke7 Qe8 - Oct 22 12:52 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥50 · … c8=Q Kf7 Qg8 Ke7
deep line, ply ≥50 · … c8=Q Kf7 Qg8 Ke7 - Oct 22 12:52 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥49 · … e5 c8=Q Kf7 Qg8
deep line, ply ≥49 · … e5 c8=Q Kf7 Qg8 - Oct 22 12:52 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥48 · … c7 e5 c8=Q Kf7
deep line, ply ≥48 · … c7 e5 c8=Q Kf7 - Oct 22 12:52 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥47 · … dxe4 c7 e5 c8=Q
deep line, ply ≥47 · … dxe4 c7 e5 c8=Q - Oct 22 12:52 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥46 · … c6 dxe4 c7 e5
deep line, ply ≥46 · … c6 dxe4 c7 e5 - Oct 22 12:52 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥45 · … Rxc8 c6 dxe4 c7
deep line, ply ≥45 · … Rxc8 c6 dxe4 c7 - Oct 22 12:52 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥44 · … Qc8 Rxc8 c6 dxe4
deep line, ply ≥44 · … Qc8 Rxc8 c6 dxe4 - Oct 22 12:52 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥43 · … Rc7 Qc8 Rxc8 c6
deep line, ply ≥43 · … Rc7 Qc8 Rxc8 c6 - Oct 22 12:52 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥42 · … Qb7 Rc7 Qc8 Rxc8
deep line, ply ≥42 · … Qb7 Rc7 Qc8 Rxc8