82.8M
positions
15.8M
practically solved
302.91T
engine nodes
2.3M
analyses
2,195
in queue
4
active workers
28
active cores
3.8M
nodes / sec
8.9
positions / min
85
proof number
4,552
disproof number
Root conquest: 0/20 first moves solved · 19.1% of tree positions solved · last 24h: 70,048 closures, 3.18T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 70 over 218 open obligations, of which 41 (18.8%) 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 48.1m (median of 20) · measured at 2026-10-13 03:00 UTC
Closures by source, last 24h (70048 of 70048 labelled): USER 98.7% (69153) · FILL 0.3% (240) · AUTO 0.9% (598) · SOLVE 0.0% (0) · NONE 0.1% (57) · last 7d (1425115 of 1425115): USER 97.7% (1392471) · FILL 0.2% (2747) · AUTO 2.1% (29481) · SOLVE 0.0% (0) · NONE 0.0% (416). 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. e4 e6 … b5 17. a4 e5 18. axb5 a6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 Nh6 … 8. h4 Nxg4 9. Bxf4 d5 10. b3 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 Nh6 … 8. h4 Nxg4 9. Bxf4 d5 10. f3 (User) · 128.0M 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 | 1128 | 2 | |
| g1h3 | unsolved | 753 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| e2e4 | unsolved | 400 | 2 | |
| d2d4 | unsolved | 393 | 2 | |
| b1c3 | unsolved | 127 | 2 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b1a3 | unsolved | 0 | 3 | |
| 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 43.2% of the fleet | 1.37T | 8,433 |
| 2 | Torom 37.8% of the fleet | 1.20T | 8,070 |
| 3 | RickEdinson 13.6% of the fleet | 432.48B | 2,701 |
| 4 | MoNiKaMaDnEsS 5.3% of the fleet | 169.83B | 1,152 |
4 accounts · 3.18T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 29.8% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 16.0% of the fleet | 48.45T | 336,417 |
| 3 | tenzink 14.1% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.4% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 6.0% of the fleet | 18.16T | 130,741 |
| 6 | Torom 4.8% of the fleet | 14.40T | 104,848 |
| 7 | RickEdinson 4.1% of the fleet | 12.55T | 82,956 |
| 8 | JackIV 3.3% of the fleet | 10.06T | 67,859 |
| 9 | gannet 2.4% of the fleet | 7.24T | 46,848 |
| 10 | MoNiKaMaDnEsS 2.3% of the fleet | 6.98T | 47,246 |
and 25 more.
35 accounts · 302.98T 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 13 03:53 MATE_RECERTIFIEDview
1. Nf3 f6 2. Nd4 d6 … Rb6 14. Qc5 Kd8 15. Qc8 Ke7
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 d5 7. e4 Bd6 8. exd5 g5 9. Qf3 Rd8 10. d4 g4 11. Qa3 Rd6 12. Qa5 g3 13. fxg3 Rb6 14. Qc5 Kd8 15. Qc8 Ke7 - Oct 13 03:53 MATE_RECERTIFIEDview
1. Nf3 f6 2. e4 e6 … 13. Qb3 Ng4 14. f3 Ne3 15. Bxh8
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Ba3 6. Bb5 Nc6 7. O-O a6 8. c3 Bd6 9. Ne5 Bxe5 10. Bh6 g6 11. Bg7 Nh6 12. h3 d6 13. Qb3 Ng4 14. f3 Ne3 15. Bxh8 - Oct 13 03:53 Solved: WHITE_WIN via MINIMAXview
deep line, ply ≥30 · … Qa4 Nh7 Bd7 Rb8
deep line, ply ≥30 · … Qa4 Nh7 Bd7 Rb8 - Oct 13 03:53 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥50 · … Qf7 g3 f3 b4
deep line, ply ≥50 · … Qf7 g3 f3 b4 - Oct 13 03:53 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥49 · … g4 Qf7 g3 f3
deep line, ply ≥49 · … g4 Qf7 g3 f3 - Oct 13 03:53 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥48 · … Bxb7 g4 Qf7 g3
deep line, ply ≥48 · … Bxb7 g4 Qf7 g3 - Oct 13 03:53 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥47 · … e6 Bxb7 g4 Qf7
deep line, ply ≥47 · … e6 Bxb7 g4 Qf7 - Oct 13 03:53 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥46 · … Bc8 e6 Bxb7 g4
deep line, ply ≥46 · … Bc8 e6 Bxb7 g4 - Oct 13 03:53 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥45 · … Rb7 Bc8 e6 Bxb7
deep line, ply ≥45 · … Rb7 Bc8 e6 Bxb7 - Oct 13 03:53 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥44 · … e5 Rb7 Bc8 e6
deep line, ply ≥44 · … e5 Rb7 Bc8 e6 - Oct 13 03:53 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥43 · … g5 e5 Rb7 Bc8
deep line, ply ≥43 · … g5 e5 Rb7 Bc8 - Oct 13 03:53 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥42 · … Qe8 g5 e5 Rb7
deep line, ply ≥42 · … Qe8 g5 e5 Rb7