76.4M
positions
14.4M
practically solved
275.16T
engine nodes
2.1M
analyses
701
in queue
17
active workers
80
active cores
16.1M
nodes / sec
31.4
positions / min
82
proof number
3,796
disproof number
Root conquest: 0/20 first moves solved · 18.8% of tree positions solved · last 24h: 234,187 closures, 3.80T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 69 over 220 open obligations, of which 42 (19.1%) 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 37s (median of 29) · measured at 2026-10-06 18:00 UTC
Closures by source, last 24h (234187 of 234187 labelled): USER 99.8% (233808) · FILL 0.1% (294) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.0% (85) · last 7d (2078728 of 2078728): USER 99.8% (2073671) · FILL 0.0% (294) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.2% (4763). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. d4 e6 2. Nf3 f6 … Qf7 10. Ng6 d5 11. Na3 b5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 c6 … 10. c4 Bh3 11. gxh3 e6 12. Qe1 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. e4 e6 … exd4 18. hxg5 Rh4 19. Rxh4 Bc5 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nh3 d5 2. Nc3 h6 … Nh6 16. Qc2 fxe4 17. g4 Ng6 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … 31. cxb6 Kd4 32. d6 Bg5 33. d7 (User) · 128.0M 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 | 1103 | 2 | |
| g1h3 | unsolved | 682 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 441 | 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 40.6% of the fleet | 1.54T | 9,535 |
| 2 | tenzink 17.5% of the fleet | 666.31B | 4,043 |
| 3 | randomchampgamer 16.6% of the fleet | 631.71B | 3,760 |
| 4 | RickEdinson 12.4% of the fleet | 472.85B | 2,789 |
| 5 | Torom 6.9% of the fleet | 262.87B | 1,839 |
| 6 | MoNiKaMaDnEsS 5.9% of the fleet | 225.02B | 1,447 |
6 accounts · 3.80T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 32.8% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.3% of the fleet | 42.05T | 344,204 |
| 3 | BManBJ 14.4% of the fleet | 39.60T | 278,081 |
| 4 | auranvesdranor 11.4% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 5.4% of the fleet | 14.81T | 108,972 |
| 6 | JackIV 3.7% of the fleet | 10.06T | 67,859 |
| 7 | RickEdinson 3.6% of the fleet | 9.81T | 65,536 |
| 8 | gannet 2.6% of the fleet | 7.24T | 46,848 |
| 9 | MoNiKaMaDnEsS 2.1% of the fleet | 5.77T | 38,603 |
| 10 | NeoArcturus 1.5% of the fleet | 4.09T | 16,758 |
and 25 more.
35 accounts · 275.30T 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 06 18:36 Solved: BLACK_WIN via MATE_PVview
deep line, ply ≥96 · … Rd2 Kf1 Re2 Kg1
deep line, ply ≥96 · … Rd2 Kf1 Re2 Kg1 - Oct 06 18:36 Solved: BLACK_WIN via MATE_PVview
deep line, ply ≥96 · … Ke1 Rd2 Kf1 Re2
deep line, ply ≥96 · … Ke1 Rd2 Kf1 Re2 - Oct 06 18:36 Solved: BLACK_WIN via MATE_PVview
deep line, ply ≥96 · … Rc2 Ke1 Rd2 Kf1
deep line, ply ≥96 · … Rc2 Ke1 Rd2 Kf1 - Oct 06 18:36 Solved: BLACK_WIN via MATE_PVview
deep line, ply ≥96 · … Kd1 Rc2 Ke1 Rd2
deep line, ply ≥96 · … Kd1 Rc2 Ke1 Rd2 - Oct 06 18:36 Solved: BLACK_WIN via MATE_PVview
deep line, ply ≥96 · … Rb2 Kd1 Rc2 Ke1
deep line, ply ≥96 · … Rb2 Kd1 Rc2 Ke1 - Oct 06 18:36 Solved: BLACK_WIN via MATE_PVview
deep line, ply ≥96 · … Kc1 Rb2 Kd1 Rc2
deep line, ply ≥96 · … Kc1 Rb2 Kd1 Rc2 - Oct 06 18:36 Solved: BLACK_WIN via MATE_PVview
deep line, ply ≥96 · … Nxg3 Kc1 Rb2 Kd1
deep line, ply ≥96 · … Nxg3 Kc1 Rb2 Kd1 - Oct 06 18:36 Solved: BLACK_WIN via MATE_PVview
deep line, ply ≥96 · … Kb1 Nxg3 Kc1 Rb2
deep line, ply ≥96 · … Kb1 Nxg3 Kc1 Rb2 - Oct 06 18:36 Solved: BLACK_WIN via MATE_PVview
deep line, ply ≥96 · … Ra2 Kb1 Nxg3 Kc1
deep line, ply ≥96 · … Ra2 Kb1 Nxg3 Kc1 - Oct 06 18:36 Solved: BLACK_WIN via MATE_PVview
deep line, ply ≥96 · … Rg3 Ra2 Kb1 Nxg3
deep line, ply ≥96 · … Rg3 Ra2 Kb1 Nxg3 - Oct 06 18:36 Solved: BLACK_WIN via MATE_PVview
deep line, ply ≥96 · … Rb2 Rg3 Ra2 Kb1
deep line, ply ≥96 · … Rb2 Rg3 Ra2 Kb1 - Oct 06 18:36 Solved: BLACK_WIN via MATE_PVview
deep line, ply ≥96 · … Ka1 Rb2 Rg3 Ra2
deep line, ply ≥96 · … Ka1 Rb2 Rg3 Ra2