104.3M
positions
22.2M
practically solved
385.38T
engine nodes
2.9M
analyses
656
in queue
active workers
24
active cores
20.1M
nodes / sec
5.5
positions / min
107
proof number
4,824
disproof number
Root conquest: 0/20 first moves solved · 21.3% of tree positions solved · last 24h: 119,799 closures, 2.27T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 over 202 open obligations, of which 37 (18.3%) 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 4.2m (median of 73) · measured at 2026-11-01 02:00 UTC
Closures by source, last 24h (119799 of 119799 labelled): USER 99.6% (119363) · FILL 0.3% (410) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.0% (26) · last 7d (1263461 of 1263461): USER 97.9% (1237195) · FILL 0.8% (9572) · AUTO 1.3% (16193) · SOLVE 0.0% (0) · NONE 0.0% (501). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing all workers
- 1. Nf3 d6 2. Ng5 f5 … Nb4 12. axb4 b5 13. h3 c5 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#0
- 1. Nf3 d6 2. Ng5 f5 … Nb4 12. axb4 b5 13. h3 e5 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … Nb4 12. axb4 b5 13. h3 Ra6 (User) · 512.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. e3 e6 2. Nf3 Qf6 … 6. Qc2 Qf5 7. e4 Bb4 8. Ne5 (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 | 1107 | 2 | |
| g1h3 | unsolved | 820 | 2 | |
| e2e3 | unsolved | 469 | 3 | |
| e2e4 | unsolved | 410 | 2 | |
| d2d4 | unsolved | 405 | 2 | |
| b1c3 | unsolved | 142 | 2 | |
| b1a3 | unsolved | 0 | 3 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b2b4 | unsolved | -59 | 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 71.3% of the fleet | 1.62T | 6,554 |
| 2 | RickEdinson 19.3% of the fleet | 437.75B | 2,916 |
| 3 | MoNiKaMaDnEsS 9.0% of the fleet | 205.60B | 1,355 |
| 4 | soothdest 0.4% of the fleet | 10.22B | 64 |
4 accounts · 2.27T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 23.4% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 20.4% of the fleet | 78.71T | 531,118 |
| 3 | Torom 13.1% of the fleet | 50.55T | 363,522 |
| 4 | tenzink 11.1% of the fleet | 42.83T | 349,427 |
| 5 | auranvesdranor 8.1% of the fleet | 31.40T | 228,002 |
| 6 | RickEdinson 5.5% of the fleet | 21.26T | 139,303 |
| 7 | randomchampgamer 5.2% of the fleet | 19.85T | 140,897 |
| 8 | MoNiKaMaDnEsS 3.2% of the fleet | 12.51T | 86,478 |
| 9 | JackIV 2.6% of the fleet | 10.06T | 67,859 |
| 10 | gannet 1.9% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 385.40T 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
- Nov 01 02:23 Solved: BLACK_WIN via MINIMAXview
1. c3 e6 2. Nf3 Qf6 … 6. Qc2 Qf5 7. e4 Bb4 8. Nh4
1. c3 e6 2. Nf3 Qf6 3. e3 Bc5 4. Bb5 Kf8 5. d4 Nh6 6. Qc2 Qf5 7. e4 Bb4 8. Nh4 - Nov 01 02:23 Solved: BLACK_WIN via MINIMAXview
1. c3 e6 2. Nf3 Qf6 … 6. Qc2 Qf5 7. e4 Bb4 8. Nfd2
1. c3 e6 2. Nf3 Qf6 3. e3 Bc5 4. Bb5 Kf8 5. d4 Nh6 6. Qc2 Qf5 7. e4 Bb4 8. Nfd2 - Nov 01 02:23 Solved: BLACK_WIN via MATE_PVview
1. c3 e6 2. Nf3 Qf6 … 10. g3 Qh3 11. Kd1 Qg2 12. Bxd7
1. c3 e6 2. Nf3 Qf6 3. e3 Bc5 4. Bb5 Kf8 5. d4 Nh6 6. Qc2 Qf5 7. e4 Bb4 8. Nfd2 Qg5 9. f4 Qh4 10. g3 Qh3 11. Kd1 Qg2 12. Bxd7 - Nov 01 02:23 Solved: BLACK_WIN via MATE_PVview
1. c3 e6 2. Nf3 Qf6 … Qh4 10. g3 Qh3 11. Kd1 Qg2
1. c3 e6 2. Nf3 Qf6 3. e3 Bc5 4. Bb5 Kf8 5. d4 Nh6 6. Qc2 Qf5 7. e4 Bb4 8. Nfd2 Qg5 9. f4 Qh4 10. g3 Qh3 11. Kd1 Qg2 - Nov 01 02:23 Solved: BLACK_WIN via MATE_PVview
1. c3 e6 2. Nf3 Qf6 … 9. f4 Qh4 10. g3 Qh3 11. Kd1
1. c3 e6 2. Nf3 Qf6 3. e3 Bc5 4. Bb5 Kf8 5. d4 Nh6 6. Qc2 Qf5 7. e4 Bb4 8. Nfd2 Qg5 9. f4 Qh4 10. g3 Qh3 11. Kd1 - Nov 01 02:23 Solved: BLACK_WIN via MATE_PVview
1. c3 e6 2. Nf3 Qf6 … Qg5 9. f4 Qh4 10. g3 Qh3
1. c3 e6 2. Nf3 Qf6 3. e3 Bc5 4. Bb5 Kf8 5. d4 Nh6 6. Qc2 Qf5 7. e4 Bb4 8. Nfd2 Qg5 9. f4 Qh4 10. g3 Qh3 - Nov 01 02:23 Solved: BLACK_WIN via MATE_PVview
1. c3 e6 2. Nf3 Qf6 … 8. Nfd2 Qg5 9. f4 Qh4 10. g3
1. c3 e6 2. Nf3 Qf6 3. e3 Bc5 4. Bb5 Kf8 5. d4 Nh6 6. Qc2 Qf5 7. e4 Bb4 8. Nfd2 Qg5 9. f4 Qh4 10. g3 - Nov 01 02:23 Solved: BLACK_WIN via MATE_PVview
1. c3 e6 2. Nf3 Qf6 … Bb4 8. Nfd2 Qg5 9. f4 Qh4
1. c3 e6 2. Nf3 Qf6 3. e3 Bc5 4. Bb5 Kf8 5. d4 Nh6 6. Qc2 Qf5 7. e4 Bb4 8. Nfd2 Qg5 9. f4 Qh4 - Nov 01 02:23 Solved: BLACK_WIN via MATE_PVview
1. c3 e6 2. Nf3 Qf6 … 7. e4 Bb4 8. Nfd2 Qg5 9. f4
1. c3 e6 2. Nf3 Qf6 3. e3 Bc5 4. Bb5 Kf8 5. d4 Nh6 6. Qc2 Qf5 7. e4 Bb4 8. Nfd2 Qg5 9. f4 - Nov 01 02:23 Solved: BLACK_WIN via MATE_PVview
1. c3 e6 2. Nf3 Qf6 … Qf5 7. e4 Bb4 8. Nfd2 Qg5
1. c3 e6 2. Nf3 Qf6 3. e3 Bc5 4. Bb5 Kf8 5. d4 Nh6 6. Qc2 Qf5 7. e4 Bb4 8. Nfd2 Qg5 - Nov 01 02:23 Solved: BLACK_WIN via MATE_PVview
1. c3 e6 2. Nf3 Qf6 … 10. Kd1 Ne3 11. Ke1 Nd1 12. Be3
1. c3 e6 2. Nf3 Qf6 3. e3 Bc5 4. Bb5 Kf8 5. d4 Nh6 6. Qc2 Qf5 7. e4 Bb4 8. Nfd2 Qh5 9. Nf3 Ng4 10. Kd1 Ne3 11. Ke1 Nd1 12. Be3 - Nov 01 02:23 Solved: BLACK_WIN via MATE_PVview
1. c3 e6 2. Nf3 Qf6 … Ng4 10. Kd1 Ne3 11. Ke1 Nd1
1. c3 e6 2. Nf3 Qf6 3. e3 Bc5 4. Bb5 Kf8 5. d4 Nh6 6. Qc2 Qf5 7. e4 Bb4 8. Nfd2 Qh5 9. Nf3 Ng4 10. Kd1 Ne3 11. Ke1 Nd1