75.5M
positions
14.1M
practically solved
271.08T
engine nodes
2.1M
analyses
5,148
in queue
10
active workers
56
active cores
15.6M
nodes / sec
16.2
positions / min
82
proof number
3,796
disproof number
Root conquest: 0/20 first moves solved · 18.7% of tree positions solved · last 24h: 225,955 closures, 3.22T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 67 over 215 open obligations, of which 42 (19.5%) 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 40s (median of 151) · measured at 2026-10-05 16:00 UTC
Closures by source, last 24h (225954 of 225954 labelled): USER 99.7% (225176) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.3% (778) · last 7d (2178524 of 2178525): USER 99.8% (2173336) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.2% (5188). 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 … 15. d3 d5 16. Be3 b6 17. f6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- deep line, ply ≥51 · … a5 Bf5 d6 Bd3 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- deep line, ply ≥49 · … f4 b6 a5 Kd7 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#2
- deep line, ply ≥50 · … a5 g5 f4 Nf7 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- deep line, ply ≥52 · … Kd7 h4 Bb1 h5 (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 | 1101 | 2 | |
| g1h3 | unsolved | 820 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 440 | 2 | |
| e2e4 | unsolved | 418 | 2 | |
| b1c3 | unsolved | 105 | 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 | BManBJ 35.2% of the fleet | 1.13T | 7,503 |
| 2 | tenzink 22.0% of the fleet | 708.88B | 4,775 |
| 3 | randomchampgamer 20.8% of the fleet | 670.98B | 4,777 |
| 4 | RickEdinson 14.7% of the fleet | 472.96B | 3,194 |
| 5 | MoNiKaMaDnEsS 7.2% of the fleet | 233.20B | 1,633 |
| 6 | quasa 0.1% of the fleet | 3.35B | 27 |
6 accounts · 3.22T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 33.3% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.2% of the fleet | 41.33T | 339,871 |
| 3 | BManBJ 14.0% of the fleet | 37.93T | 267,844 |
| 4 | auranvesdranor 11.6% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 5.2% of the fleet | 14.13T | 104,906 |
| 6 | JackIV 3.7% of the fleet | 10.06T | 67,859 |
| 7 | RickEdinson 3.4% of the fleet | 9.30T | 62,570 |
| 8 | gannet 2.7% of the fleet | 7.24T | 46,848 |
| 9 | MoNiKaMaDnEsS 2.0% of the fleet | 5.51T | 36,967 |
| 10 | NeoArcturus 1.5% of the fleet | 4.09T | 16,758 |
and 25 more.
35 accounts · 271.20T 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 · 17 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 21 proposals · see every proposal
Milestones
- Oct 05 16:44 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥67 · … d8=Q Kb7 Qb8 Kc6
deep line, ply ≥67 · … d8=Q Kb7 Qb8 Kc6 - Oct 05 16:44 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥66 · … Nxe5 d8=Q Kb7 Qb8
deep line, ply ≥66 · … Nxe5 d8=Q Kb7 Qb8 - Oct 05 16:44 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥65 · … Qe5 Nxe5 d8=Q Kb7
deep line, ply ≥65 · … Qe5 Nxe5 d8=Q Kb7 - Oct 05 16:44 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥64 · … Nc6 Qe5 Nxe5 d8=Q
deep line, ply ≥64 · … Nc6 Qe5 Nxe5 d8=Q - Oct 05 16:44 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥63 · … Qf6 Nc6 Qe5 Nxe5
deep line, ply ≥63 · … Qf6 Nc6 Qe5 Nxe5 - Oct 05 16:44 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥62 · … Bf5 Qf6 Nc6 Qe5
deep line, ply ≥62 · … Bf5 Qf6 Nc6 Qe5 - Oct 05 16:44 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥61 · … f8=Q Bf5 Qf6 Nc6
deep line, ply ≥61 · … f8=Q Bf5 Qf6 Nc6 - Oct 05 16:44 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥60 · … Bc2 f8=Q Bf5 Qf6
deep line, ply ≥60 · … Bc2 f8=Q Bf5 Qf6 - Oct 05 16:44 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥59 · … f7 Bc2 f8=Q Bf5
deep line, ply ≥59 · … f7 Bc2 f8=Q Bf5 - Oct 05 16:44 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥58 · … b5 f7 Bc2 f8=Q
deep line, ply ≥58 · … b5 f7 Bc2 f8=Q - Oct 05 16:44 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥57 · … f6 b5 f7 Bc2
deep line, ply ≥57 · … f6 b5 f7 Bc2 - Oct 05 16:44 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥56 · … Bb3 f6 b5 f7
deep line, ply ≥56 · … Bb3 f6 b5 f7