83.4M
positions
15.9M
practically solved
306.04T
engine nodes
2.3M
analyses
1,947
in queue
5
active workers
34
active cores
0
nodes / sec
10.2
positions / min
85
proof number
4,551
disproof number
Root conquest: 0/20 first moves solved · 19.1% of tree positions solved · last 24h: 100,893 closures, 3.78T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 70 over 216 open obligations, of which 41 (19.0%) 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 3.8h (median of 1) · measured at 2026-10-13 18:00 UTC
Closures by source, last 24h (100893 of 100893 labelled): USER 99.4% (100269) · FILL 0.5% (553) · AUTO 0.0% (16) · SOLVE 0.0% (0) · NONE 0.1% (55) · last 7d (1343940 of 1343940): USER 97.5% (1310839) · FILL 0.2% (3195) · AUTO 2.2% (29497) · SOLVE 0.0% (0) · NONE 0.0% (409). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nh3 d5 2. Nc3 h6 … 12. Bb2 g4 13. g3 Qd7 14. b5 (User) · 512.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. e3 e6 … Bb4 6. c3 c6 7. h3 Kf8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. e3 e6 … Bb4 6. c3 c6 7. h3 Kf7 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 c6 … 30. Rd5 Bf6 31. h3 Be5 32. b4 (User) · 128.0M nodes · randomchampgamer-2026PC-atomicdb
- 1. Nf3 f6 2. e4 e6 … 10. d4 axb5 11. a4 b5 12. c4 (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 | 1084 | 2 | |
| g1h3 | unsolved | 753 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| e2e4 | unsolved | 400 | 2 | |
| d2d4 | unsolved | 395 | 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 36.5% of the fleet | 1.38T | 8,012 |
| 2 | Torom 34.2% of the fleet | 1.29T | 8,506 |
| 3 | RickEdinson 11.1% of the fleet | 420.36B | 2,469 |
| 4 | randomchampgamer 9.5% of the fleet | 357.31B | 1,780 |
| 5 | MoNiKaMaDnEsS 8.7% of the fleet | 330.24B | 1,980 |
5 accounts · 3.78T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 29.5% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 16.1% of the fleet | 49.37T | 341,400 |
| 3 | tenzink 14.0% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.3% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 6.0% of the fleet | 18.52T | 132,521 |
| 6 | Torom 5.1% of the fleet | 15.70T | 113,354 |
| 7 | RickEdinson 4.2% of the fleet | 12.81T | 84,326 |
| 8 | JackIV 3.3% of the fleet | 10.06T | 67,859 |
| 9 | MoNiKaMaDnEsS 2.4% of the fleet | 7.30T | 49,090 |
| 10 | gannet 2.4% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 306.12T 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 18:50 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nd4 Nh6 … Bb4 6. c3 c6 7. h3 Ne5
1. Nf3 f6 2. Nd4 Nh6 3. f4 Ng4 4. e3 e6 5. Nb5 Bb4 6. c3 c6 7. h3 Ne5 - Oct 13 18:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 Nh6 … f5 11. Nxg7 Kd6 12. Qf7 Qh4
1. Nf3 f6 2. Nd4 Nh6 3. f4 Ng4 4. e3 e6 5. Nb5 Bb4 6. c3 c6 7. h3 Ne5 8. Nd6 Ke7 9. Qh5 Ng6 10. Ne8 f5 11. Nxg7 Kd6 12. Qf7 Qh4 - Oct 13 18:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 Nh6 … 10. Ne8 f5 11. Nxg7 Kd6 12. Qf7
1. Nf3 f6 2. Nd4 Nh6 3. f4 Ng4 4. e3 e6 5. Nb5 Bb4 6. c3 c6 7. h3 Ne5 8. Nd6 Ke7 9. Qh5 Ng6 10. Ne8 f5 11. Nxg7 Kd6 12. Qf7 - Oct 13 18:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 Nh6 … Ng6 10. Ne8 f5 11. Nxg7 Kd6
1. Nf3 f6 2. Nd4 Nh6 3. f4 Ng4 4. e3 e6 5. Nb5 Bb4 6. c3 c6 7. h3 Ne5 8. Nd6 Ke7 9. Qh5 Ng6 10. Ne8 f5 11. Nxg7 Kd6 - Oct 13 18:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 Nh6 … 9. Qh5 Ng6 10. Ne8 f5 11. Nxg7
1. Nf3 f6 2. Nd4 Nh6 3. f4 Ng4 4. e3 e6 5. Nb5 Bb4 6. c3 c6 7. h3 Ne5 8. Nd6 Ke7 9. Qh5 Ng6 10. Ne8 f5 11. Nxg7 - Oct 13 18:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 Nh6 … Ke7 9. Qh5 Ng6 10. Ne8 f5
1. Nf3 f6 2. Nd4 Nh6 3. f4 Ng4 4. e3 e6 5. Nb5 Bb4 6. c3 c6 7. h3 Ne5 8. Nd6 Ke7 9. Qh5 Ng6 10. Ne8 f5 - Oct 13 18:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 Nh6 … 8. Nd6 Ke7 9. Qh5 Ng6 10. Ne8
1. Nf3 f6 2. Nd4 Nh6 3. f4 Ng4 4. e3 e6 5. Nb5 Bb4 6. c3 c6 7. h3 Ne5 8. Nd6 Ke7 9. Qh5 Ng6 10. Ne8 - Oct 13 18:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 Nh6 … Ne5 8. Nd6 Ke7 9. Qh5 Ng6
1. Nf3 f6 2. Nd4 Nh6 3. f4 Ng4 4. e3 e6 5. Nb5 Bb4 6. c3 c6 7. h3 Ne5 8. Nd6 Ke7 9. Qh5 Ng6 - Oct 13 18:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 Nh6 … 7. h3 Ne5 8. Nd6 Ke7 9. Qh5
1. Nf3 f6 2. Nd4 Nh6 3. f4 Ng4 4. e3 e6 5. Nb5 Bb4 6. c3 c6 7. h3 Ne5 8. Nd6 Ke7 9. Qh5 - Oct 13 18:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 Nh6 … c6 7. h3 Ne5 8. Nd6 Ke7
1. Nf3 f6 2. Nd4 Nh6 3. f4 Ng4 4. e3 e6 5. Nb5 Bb4 6. c3 c6 7. h3 Ne5 8. Nd6 Ke7 - Oct 13 18:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 Nh6 … 6. c3 c6 7. h3 Ne5 8. Nd6
1. Nf3 f6 2. Nd4 Nh6 3. f4 Ng4 4. e3 e6 5. Nb5 Bb4 6. c3 c6 7. h3 Ne5 8. Nd6 - Oct 13 18:50 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nd4 Nh6 … Bb4 6. c3 c6 7. h3 Nxe3
1. Nf3 f6 2. Nd4 Nh6 3. f4 Ng4 4. e3 e6 5. Nb5 Bb4 6. c3 c6 7. h3 Nxe3