83.7M
positions
16.0M
practically solved
307.95T
engine nodes
2.3M
analyses
57
in queue
3
active workers
20
active cores
0
nodes / sec
7.7
positions / min
85
proof number
4,551
disproof number
Root conquest: 0/20 first moves solved · 19.1% of tree positions solved · last 24h: 101,398 closures, 2.11T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 over 217 open obligations, of which 41 (18.9%) 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 1.8h (median of 12) · measured at 2026-10-14 16:00 UTC
Closures by source, last 24h (101398 of 101398 labelled): USER 99.7% (101049) · FILL 0.2% (186) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.2% (163) · last 7d (1154625 of 1154625): USER 97.1% (1121388) · FILL 0.3% (3255) · AUTO 2.6% (29472) · SOLVE 0.0% (0) · NONE 0.0% (510). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nf3 d6 2. Ng5 f5 … Bxh6 11. O-O Nbd7 12. fxe4 Ne5 (User) · 128.0M nodes · MoNiKaMaDnEsS-DESKTOP-VG9VPVH-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Bxh6 11. O-O Nbd7 12. fxe4 Nc5 (User) · 128.0M nodes · randomchampgamer-2026PC-atomicdb
- 1. Nh3 d5 2. Nc3 h6 … Kh8 21. Be2 Qg8 22. Bb2 Rd8 (User) · 512.0M 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 | 1134 | 2 | |
| g1h3 | unsolved | 703 | 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 | -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 33.0% of the fleet | 694.90B | 3,739 |
| 2 | randomchampgamer 32.2% of the fleet | 677.82B | 2,715 |
| 3 | RickEdinson 18.1% of the fleet | 381.59B | 2,053 |
| 4 | MoNiKaMaDnEsS 16.7% of the fleet | 352.90B | 1,958 |
4 accounts · 2.11T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 29.3% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 16.2% of the fleet | 49.94T | 344,541 |
| 3 | tenzink 13.9% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.2% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 6.2% of the fleet | 19.14T | 135,012 |
| 6 | Torom 5.1% of the fleet | 15.70T | 113,354 |
| 7 | RickEdinson 4.3% of the fleet | 13.15T | 86,258 |
| 8 | JackIV 3.3% of the fleet | 10.06T | 67,859 |
| 9 | MoNiKaMaDnEsS 2.5% of the fleet | 7.65T | 51,047 |
| 10 | gannet 2.3% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 308.00T 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 14 16:45 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … Bxh6 11. O-O Nbd7 12. fxe4 Nd5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 Be4 9. f3 g6 10. Bh6 Bxh6 11. O-O Nbd7 12. fxe4 Nd5 - Oct 14 16:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … b5 17. Nc3 h6 18. Re1 h5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 Be4 9. f3 g6 10. Bh6 Bxh6 11. O-O Nbd7 12. fxe4 Nd5 13. Nxd6 O-O-O 14. Qe1 Rhf8 15. Qxe7 cxb5 16. Rf7 b5 17. Nc3 h6 18. Re1 h5 - Oct 14 16:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 16. Rf7 b5 17. Nc3 h6 18. Re1
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 Be4 9. f3 g6 10. Bh6 Bxh6 11. O-O Nbd7 12. fxe4 Nd5 13. Nxd6 O-O-O 14. Qe1 Rhf8 15. Qxe7 cxb5 16. Rf7 b5 17. Nc3 h6 18. Re1 - Oct 14 16:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … cxb5 16. Rf7 b5 17. Nc3 h6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 Be4 9. f3 g6 10. Bh6 Bxh6 11. O-O Nbd7 12. fxe4 Nd5 13. Nxd6 O-O-O 14. Qe1 Rhf8 15. Qxe7 cxb5 16. Rf7 b5 17. Nc3 h6 - Oct 14 16:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 15. Qxe7 cxb5 16. Rf7 b5 17. Nc3
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 Be4 9. f3 g6 10. Bh6 Bxh6 11. O-O Nbd7 12. fxe4 Nd5 13. Nxd6 O-O-O 14. Qe1 Rhf8 15. Qxe7 cxb5 16. Rf7 b5 17. Nc3 - Oct 14 16:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Rhf8 15. Qxe7 cxb5 16. Rf7 b5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 Be4 9. f3 g6 10. Bh6 Bxh6 11. O-O Nbd7 12. fxe4 Nd5 13. Nxd6 O-O-O 14. Qe1 Rhf8 15. Qxe7 cxb5 16. Rf7 b5 - Oct 14 16:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 14. Qe1 Rhf8 15. Qxe7 cxb5 16. Rf7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 Be4 9. f3 g6 10. Bh6 Bxh6 11. O-O Nbd7 12. fxe4 Nd5 13. Nxd6 O-O-O 14. Qe1 Rhf8 15. Qxe7 cxb5 16. Rf7 - Oct 14 16:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … O-O-O 14. Qe1 Rhf8 15. Qxe7 cxb5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 Be4 9. f3 g6 10. Bh6 Bxh6 11. O-O Nbd7 12. fxe4 Nd5 13. Nxd6 O-O-O 14. Qe1 Rhf8 15. Qxe7 cxb5 - Oct 14 16:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 13. Nxd6 O-O-O 14. Qe1 Rhf8 15. Qxe7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 Be4 9. f3 g6 10. Bh6 Bxh6 11. O-O Nbd7 12. fxe4 Nd5 13. Nxd6 O-O-O 14. Qe1 Rhf8 15. Qxe7 - Oct 14 16:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Nd5 13. Nxd6 O-O-O 14. Qe1 Rhf8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 Be4 9. f3 g6 10. Bh6 Bxh6 11. O-O Nbd7 12. fxe4 Nd5 13. Nxd6 O-O-O 14. Qe1 Rhf8 - Oct 14 16:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 12. fxe4 Nd5 13. Nxd6 O-O-O 14. Qe1
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 Be4 9. f3 g6 10. Bh6 Bxh6 11. O-O Nbd7 12. fxe4 Nd5 13. Nxd6 O-O-O 14. Qe1 - Oct 14 16:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Nbd7 12. fxe4 Nd5 13. Nxd6 O-O-O
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 Be4 9. f3 g6 10. Bh6 Bxh6 11. O-O Nbd7 12. fxe4 Nd5 13. Nxd6 O-O-O