103.3M
positions
21.8M
practically solved
379.95T
engine nodes
2.8M
analyses
716
in queue
active workers
28
active cores
23.7M
nodes / sec
4.2
positions / min
107
proof number
4,824
disproof number
Root conquest: 0/20 first moves solved · 21.1% of tree positions solved · last 24h: 198,761 closures, 5.20T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 over 200 open obligations, of which 36 (18.0%) 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 50s (median of 38) · measured at 2026-10-29 19:00 UTC
Closures by source, last 24h (198761 of 198761 labelled): USER 96.9% (192664) · FILL 2.1% (4167) · AUTO 0.9% (1824) · SOLVE 0.0% (0) · NONE 0.1% (106) · last 7d (1898418 of 1898418): USER 98.6% (1871982) · FILL 0.5% (9638) · AUTO 0.9% (16257) · SOLVE 0.0% (0) · NONE 0.0% (541). 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 … g6 10. c4 Bh6 11. O-O Bg7 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#0
- 1. Nf3 d6 2. Ng5 f5 … g6 10. c4 Nd7 11. O-O Nb8 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … g6 10. c4 Bh6 11. O-O Bxg5 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 d6 2. Ng5 f5 … g6 10. c4 Bh6 11. O-O d5 (User) · 512.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nh3 f6 2. e4 e5 … Rf7 14. Ng7 Qf8 15. Qb4 Bg4 (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 | 1202 | 2 | |
| g1h3 | unsolved | 820 | 2 | |
| e2e3 | unsolved | 469 | 3 | |
| d2d4 | unsolved | 405 | 2 | |
| e2e4 | unsolved | 401 | 2 | |
| b1c3 | unsolved | 141 | 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 | Torom 55.9% of the fleet | 2.91T | 18,380 |
| 2 | BManBJ 32.3% of the fleet | 1.68T | 5,617 |
| 3 | RickEdinson 9.2% of the fleet | 476.43B | 3,112 |
| 4 | MoNiKaMaDnEsS 2.6% of the fleet | 136.53B | 921 |
4 accounts · 5.20T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 23.8% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 19.7% of the fleet | 74.95T | 516,712 |
| 3 | Torom 13.3% of the fleet | 50.55T | 363,522 |
| 4 | tenzink 11.3% of the fleet | 42.83T | 349,427 |
| 5 | auranvesdranor 8.3% of the fleet | 31.40T | 228,002 |
| 6 | RickEdinson 5.3% of the fleet | 20.27T | 132,879 |
| 7 | randomchampgamer 5.2% of the fleet | 19.85T | 140,897 |
| 8 | MoNiKaMaDnEsS 3.1% of the fleet | 11.85T | 81,529 |
| 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 · 379.98T 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 29 19:28 Solved: BLACK_WIN via MATE_PVview
1. Nh3 f6 2. e4 e5 … 12. Qa4 Qb5 13. Kd1 Qe2 14. Kc1
1. Nh3 f6 2. e4 e5 3. Na3 d5 4. d4 h6 5. Bf4 b5 6. c3 Bg4 7. f3 Ne7 8. Bxb5 Kf7 9. Bd2 Bc8 10. Nb5 Qe8 11. Nxa7 Kg8 12. Qa4 Qb5 13. Kd1 Qe2 14. Kc1 - Oct 29 19:28 Solved: BLACK_WIN via MATE_PVview
1. Nh3 f6 2. e4 e5 … Kg8 12. Qa4 Qb5 13. Kd1 Qe2
1. Nh3 f6 2. e4 e5 3. Na3 d5 4. d4 h6 5. Bf4 b5 6. c3 Bg4 7. f3 Ne7 8. Bxb5 Kf7 9. Bd2 Bc8 10. Nb5 Qe8 11. Nxa7 Kg8 12. Qa4 Qb5 13. Kd1 Qe2 - Oct 29 19:28 Solved: BLACK_WIN via MATE_PVview
1. Nh3 f6 2. e4 e5 … 11. Nxa7 Kg8 12. Qa4 Qb5 13. Kd1
1. Nh3 f6 2. e4 e5 3. Na3 d5 4. d4 h6 5. Bf4 b5 6. c3 Bg4 7. f3 Ne7 8. Bxb5 Kf7 9. Bd2 Bc8 10. Nb5 Qe8 11. Nxa7 Kg8 12. Qa4 Qb5 13. Kd1 - Oct 29 19:28 Solved: BLACK_WIN via MATE_PVview
1. Nh3 f6 2. e4 e5 … 12. Qa4 Qb5 13. Kf2 Qe2 14. Kg1
1. Nh3 f6 2. e4 e5 3. Na3 d5 4. d4 h6 5. Bf4 b5 6. c3 Bg4 7. f3 Ne7 8. Bxb5 Kf7 9. Bd2 Bc8 10. Nb5 Qe8 11. Nxa7 Kg8 12. Qa4 Qb5 13. Kf2 Qe2 14. Kg1 - Oct 29 19:28 Solved: BLACK_WIN via MATE_PVview
1. Nh3 f6 2. e4 e5 … Kg8 12. Qa4 Qb5 13. Kf2 Qe2
1. Nh3 f6 2. e4 e5 3. Na3 d5 4. d4 h6 5. Bf4 b5 6. c3 Bg4 7. f3 Ne7 8. Bxb5 Kf7 9. Bd2 Bc8 10. Nb5 Qe8 11. Nxa7 Kg8 12. Qa4 Qb5 13. Kf2 Qe2 - Oct 29 19:28 Solved: BLACK_WIN via MATE_PVview
1. Nh3 f6 2. e4 e5 … 11. Nxa7 Kg8 12. Qa4 Qb5 13. Kf2
1. Nh3 f6 2. e4 e5 3. Na3 d5 4. d4 h6 5. Bf4 b5 6. c3 Bg4 7. f3 Ne7 8. Bxb5 Kf7 9. Bd2 Bc8 10. Nb5 Qe8 11. Nxa7 Kg8 12. Qa4 Qb5 13. Kf2 - Oct 29 19:28 Solved: BLACK_WIN via MATE_PVview
1. Nh3 f6 2. e4 e5 … 16. Bxh6 Qb4 17. Ke2 Qd2 18. Kf1
1. Nh3 f6 2. e4 e5 3. Na3 d5 4. d4 h6 5. Bf4 b5 6. c3 Bg4 7. f3 Ne7 8. Bxb5 Kf7 9. Bd2 Bc8 10. Nb5 Qe8 11. Nxa7 Kg8 12. Qa4 Qb5 13. Qc4 exd4 14. c4 Qb6 15. Kd1 dxc4 16. Bxh6 Qb4 17. Ke2 Qd2 18. Kf1 - Oct 29 19:28 Solved: BLACK_WIN via MATE_PVview
1. Nh3 f6 2. e4 e5 … dxc4 16. Bxh6 Qb4 17. Ke2 Qd2
1. Nh3 f6 2. e4 e5 3. Na3 d5 4. d4 h6 5. Bf4 b5 6. c3 Bg4 7. f3 Ne7 8. Bxb5 Kf7 9. Bd2 Bc8 10. Nb5 Qe8 11. Nxa7 Kg8 12. Qa4 Qb5 13. Qc4 exd4 14. c4 Qb6 15. Kd1 dxc4 16. Bxh6 Qb4 17. Ke2 Qd2 - Oct 29 19:28 Solved: BLACK_WIN via MATE_PVview
1. Nh3 f6 2. e4 e5 … 15. Kd1 dxc4 16. Bxh6 Qb4 17. Ke2
1. Nh3 f6 2. e4 e5 3. Na3 d5 4. d4 h6 5. Bf4 b5 6. c3 Bg4 7. f3 Ne7 8. Bxb5 Kf7 9. Bd2 Bc8 10. Nb5 Qe8 11. Nxa7 Kg8 12. Qa4 Qb5 13. Qc4 exd4 14. c4 Qb6 15. Kd1 dxc4 16. Bxh6 Qb4 17. Ke2 - Oct 29 19:28 Solved: BLACK_WIN via MATE_PVview
1. Nh3 f6 2. e4 e5 … Qb6 15. Kd1 dxc4 16. Bxh6 Qb4
1. Nh3 f6 2. e4 e5 3. Na3 d5 4. d4 h6 5. Bf4 b5 6. c3 Bg4 7. f3 Ne7 8. Bxb5 Kf7 9. Bd2 Bc8 10. Nb5 Qe8 11. Nxa7 Kg8 12. Qa4 Qb5 13. Qc4 exd4 14. c4 Qb6 15. Kd1 dxc4 16. Bxh6 Qb4 - Oct 29 19:28 Solved: BLACK_WIN via MATE_PVview
1. Nh3 f6 2. e4 e5 … 14. c4 Qb6 15. Kd1 dxc4 16. Bxh6
1. Nh3 f6 2. e4 e5 3. Na3 d5 4. d4 h6 5. Bf4 b5 6. c3 Bg4 7. f3 Ne7 8. Bxb5 Kf7 9. Bd2 Bc8 10. Nb5 Qe8 11. Nxa7 Kg8 12. Qa4 Qb5 13. Qc4 exd4 14. c4 Qb6 15. Kd1 dxc4 16. Bxh6 - Oct 29 19:28 Solved: BLACK_WIN via MATE_PVview
1. Nh3 f6 2. e4 e5 … exd4 14. c4 Qb6 15. Kd1 dxc4
1. Nh3 f6 2. e4 e5 3. Na3 d5 4. d4 h6 5. Bf4 b5 6. c3 Bg4 7. f3 Ne7 8. Bxb5 Kf7 9. Bd2 Bc8 10. Nb5 Qe8 11. Nxa7 Kg8 12. Qa4 Qb5 13. Qc4 exd4 14. c4 Qb6 15. Kd1 dxc4