85.9M
positions
16.3M
practically solved
315.55T
engine nodes
2.4M
analyses
236
in queue
13
active workers
60
active cores
4.7M
nodes / sec
31.5
positions / min
151
proof number
4,667
disproof number
Root conquest: 0/20 first moves solved · 19.0% of tree positions solved · last 24h: 26,495 closures, 2.48T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 70 over 210 open obligations, of which 38 (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 3.3m (median of 29) · measured at 2026-10-17 22:00 UTC
Closures by source, last 24h (26495 of 26495 labelled): USER 88.3% (23382) · FILL 2.3% (607) · AUTO 9.1% (2414) · SOLVE 0.0% (0) · NONE 0.3% (92) · last 7d (655999 of 655999): USER 86.6% (568090) · FILL 1.1% (6903) · AUTO 12.3% (80477) · SOLVE 0.0% (0) · NONE 0.1% (529). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nf3 f6 2. Nc3 c6 … 21. h5 a4 22. f7 Rh7 23. a3 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 c6 … d5 28. c6 e5 29. c7 Nb7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nh3 d5 2. Nc3 h6 … 13. Qb5 Qxb5 14. a4 Bc5 15. exd5 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. Nc3 c6 … e5 29. c7 Nb7 30. Rce1 exd4 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … h5 19. f5 Kh7 20. f6 Ba6 (User) · 128.0M nodes · Torom-torsten-pc-atomicdb#0
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 | 1111 | 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 | BManBJ 55.5% of the fleet | 1.38T | 6,797 |
| 2 | RickEdinson 19.8% of the fleet | 490.78B | 2,274 |
| 3 | Torom 19.4% of the fleet | 481.97B | 3,383 |
| 4 | MoNiKaMaDnEsS 5.4% of the fleet | 133.30B | 591 |
| 5 | soothdest <0.1% of the fleet | 256.7M | 3 |
5 accounts · 2.48T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 28.6% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 17.2% of the fleet | 54.17T | 381,516 |
| 3 | tenzink 13.6% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 9.9% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 6.3% of the fleet | 19.85T | 140,897 |
| 6 | Torom 5.1% of the fleet | 16.18T | 116,735 |
| 7 | RickEdinson 4.6% of the fleet | 14.61T | 97,814 |
| 8 | JackIV 3.2% of the fleet | 10.06T | 67,859 |
| 9 | MoNiKaMaDnEsS 2.7% of the fleet | 8.48T | 58,201 |
| 10 | gannet 2.3% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 315.71T 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 17 22:41 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥58 · … Rc1 Bc5 dxc5 Rd8
deep line, ply ≥58 · … Rc1 Bc5 dxc5 Rd8 - Oct 17 22:41 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥57 · … Kb8 Rc1 Bc5 dxc5
deep line, ply ≥57 · … Kb8 Rc1 Bc5 dxc5 - Oct 17 22:41 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥56 · … Ra7 Kb8 Rc1 Bc5
deep line, ply ≥56 · … Ra7 Kb8 Rc1 Bc5 - Oct 17 22:41 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥55 · … Kb7 Ra7 Kb8 Rc1
deep line, ply ≥55 · … Kb7 Ra7 Kb8 Rc1 - Oct 17 22:41 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥54 · … Ra8 Kb7 Ra7 Kb8
deep line, ply ≥54 · … Ra8 Kb7 Ra7 Kb8 - Oct 17 22:41 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥53 · … Ka7 Ra8 Kb7 Ra7
deep line, ply ≥53 · … Ka7 Ra8 Kb7 Ra7 - Oct 17 22:41 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥52 · … Rc8 Ka7 Ra8 Kb7
deep line, ply ≥52 · … Rc8 Ka7 Ra8 Kb7 - Oct 17 22:41 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥51 · … b5 Rc8 Ka7 Ra8
deep line, ply ≥51 · … b5 Rc8 Ka7 Ra8 - Oct 17 22:41 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥50 · … cxd8=Q b5 Rc8 Ka7
deep line, ply ≥50 · … cxd8=Q b5 Rc8 Ka7 - Oct 17 22:41 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥49 · … dxe4 cxd8=Q b5 Rc8
deep line, ply ≥49 · … dxe4 cxd8=Q b5 Rc8 - Oct 17 22:41 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥48 · … c7 dxe4 cxd8=Q b5
deep line, ply ≥48 · … c7 dxe4 cxd8=Q b5 - Oct 17 22:41 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥47 · … e5 c7 dxe4 cxd8=Q
deep line, ply ≥47 · … e5 c7 dxe4 cxd8=Q