81.6M
positions
15.7M
practically solved
296.76T
engine nodes
2.3M
analyses
2
in queue
6
active workers
34
active cores
12.8M
nodes / sec
6.7
positions / min
85
proof number
4,553
disproof number
Root conquest: 0/20 first moves solved · 19.2% of tree positions solved · last 24h: 102,623 closures, 5.04T 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 · measured at 2026-10-11 09:00 UTC
Closures by source, last 24h (102623 of 102623 labelled): USER 82.8% (85017) · FILL 0.6% (622) · AUTO 16.5% (16930) · SOLVE 0.0% (0) · NONE 0.1% (54) · last 7d (1654898 of 1654898): USER 98.0% (1621837) · FILL 0.2% (2693) · AUTO 1.7% (28882) · SOLVE 0.0% (0) · NONE 0.1% (1486). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nh3 f6 2. Nc3 c6 … 10. c3 Ndf6 11. e5 Qc7 12. Qa4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nh3 d5 2. Nc3 h6 … Nd2 13. e4 f4 14. Nf7 Be7 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nh3 f6 2. Nc3 c6 … 10. c3 Qc7 11. Bg5 Ndf6 12. e5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nh3 f6 2. Nc3 c6 … 10. c3 Ndf6 11. Bh3 Ng4 12. Bxg4 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nh3 f6 2. Nc3 c6 … 10. Be2 Qc7 11. c3 Ndf6 12. e5 (User) · 128.0M nodes · randomchampgamer-2026PC-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 | 1020 | 2 | |
| g1h3 | unsolved | 753 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| e2e4 | unsolved | 400 | 2 | |
| d2d4 | unsolved | 387 | 2 | |
| b1c3 | unsolved | 127 | 2 | |
| b1a3 | unsolved | 0 | 3 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| 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 | Torom 52.0% of the fleet | 2.62T | 18,593 |
| 2 | BManBJ 22.6% of the fleet | 1.14T | 9,536 |
| 3 | randomchampgamer 11.4% of the fleet | 574.94B | 3,595 |
| 4 | RickEdinson 7.6% of the fleet | 383.67B | 2,935 |
| 5 | MoNiKaMaDnEsS 6.3% of the fleet | 316.96B | 2,540 |
| 6 | soothdest <0.1% of the fleet | 25.3M | 4 |
6 accounts · 5.04T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 30.4% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 15.5% of the fleet | 46.14T | 322,736 |
| 3 | tenzink 14.4% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.6% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 6.0% of the fleet | 17.78T | 128,882 |
| 6 | Torom 4.0% of the fleet | 11.88T | 87,075 |
| 7 | RickEdinson 4.0% of the fleet | 11.80T | 78,595 |
| 8 | JackIV 3.4% 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 | 6.80T | 46,031 |
and 25 more.
35 accounts · 296.83T 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 · 17 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 11 09:50 Solved: WHITE_WIN via MATE_PVview
1. Nh3 f6 2. Nc3 c6 … Ndf6 11. Bh3 Ng4 12. Qa4 Qd7
1. Nh3 f6 2. Nc3 c6 3. e3 d5 4. Ng5 Bg4 5. f3 fxg5 6. d4 e6 7. Nb5 cxb5 8. e4 a6 9. g3 Nd7 10. c3 Ndf6 11. Bh3 Ng4 12. Qa4 Qd7 - Oct 11 09:50 Solved: WHITE_WIN via MATE_PVview
1. Nh3 f6 2. Nc3 c6 … Ng4 12. Qa4 Ke7 13. Qe8 Kd6
1. Nh3 f6 2. Nc3 c6 3. e3 d5 4. Ng5 Bg4 5. f3 fxg5 6. d4 e6 7. Nb5 cxb5 8. e4 a6 9. g3 Nd7 10. c3 Ndf6 11. Bh3 Ng4 12. Qa4 Ke7 13. Qe8 Kd6 - Oct 11 09:50 Solved: WHITE_WIN via MATE_PVview
1. Nh3 f6 2. Nc3 c6 … 11. Bh3 Ng4 12. Qa4 Ke7 13. Qe8
1. Nh3 f6 2. Nc3 c6 3. e3 d5 4. Ng5 Bg4 5. f3 fxg5 6. d4 e6 7. Nb5 cxb5 8. e4 a6 9. g3 Nd7 10. c3 Ndf6 11. Bh3 Ng4 12. Qa4 Ke7 13. Qe8 - Oct 11 09:50 Solved: WHITE_WIN via MATE_PVview
1. Nh3 f6 2. Nc3 c6 … Ndf6 11. Bh3 Ng4 12. Qa4 Ke7
1. Nh3 f6 2. Nc3 c6 3. e3 d5 4. Ng5 Bg4 5. f3 fxg5 6. d4 e6 7. Nb5 cxb5 8. e4 a6 9. g3 Nd7 10. c3 Ndf6 11. Bh3 Ng4 12. Qa4 Ke7 - Oct 11 09:50 Solved: WHITE_WIN via MATE_PVview
1. Nh3 f6 2. Nc3 c6 … Ng4 12. Qa4 Kf7 13. Qe8 Kf6
1. Nh3 f6 2. Nc3 c6 3. e3 d5 4. Ng5 Bg4 5. f3 fxg5 6. d4 e6 7. Nb5 cxb5 8. e4 a6 9. g3 Nd7 10. c3 Ndf6 11. Bh3 Ng4 12. Qa4 Kf7 13. Qe8 Kf6 - Oct 11 09:50 Solved: WHITE_WIN via MATE_PVview
1. Nh3 f6 2. Nc3 c6 … 11. Bh3 Ng4 12. Qa4 Kf7 13. Qe8
1. Nh3 f6 2. Nc3 c6 3. e3 d5 4. Ng5 Bg4 5. f3 fxg5 6. d4 e6 7. Nb5 cxb5 8. e4 a6 9. g3 Nd7 10. c3 Ndf6 11. Bh3 Ng4 12. Qa4 Kf7 13. Qe8 - Oct 11 09:50 Solved: WHITE_WIN via MATE_PVview
1. Nh3 f6 2. Nc3 c6 … Ndf6 11. Bh3 Ng4 12. Qa4 Kf7
1. Nh3 f6 2. Nc3 c6 3. e3 d5 4. Ng5 Bg4 5. f3 fxg5 6. d4 e6 7. Nb5 cxb5 8. e4 a6 9. g3 Nd7 10. c3 Ndf6 11. Bh3 Ng4 12. Qa4 Kf7 - Oct 11 09:48 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … c5 9. d5 c4 10. Ng5 b4
1. Nh3 d5 2. Nc3 h6 3. d4 c6 4. e3 Bg4 5. f3 b5 6. e4 e6 7. exd5 Bd6 8. g3 c5 9. d5 c4 10. Ng5 b4 - Oct 11 09:48 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … Qxg5 11. dxe6 f5 12. Qd8 Kf7
1. Nh3 d5 2. Nc3 h6 3. d4 c6 4. e3 Bg4 5. f3 b5 6. e4 e6 7. exd5 Bd6 8. g3 c5 9. d5 c4 10. Ng5 Qxg5 11. dxe6 f5 12. Qd8 Kf7 - Oct 11 09:48 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … 10. Ng5 Qxg5 11. dxe6 f5 12. Qd8
1. Nh3 d5 2. Nc3 h6 3. d4 c6 4. e3 Bg4 5. f3 b5 6. e4 e6 7. exd5 Bd6 8. g3 c5 9. d5 c4 10. Ng5 Qxg5 11. dxe6 f5 12. Qd8 - Oct 11 09:48 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … c4 10. Ng5 Qxg5 11. dxe6 f5
1. Nh3 d5 2. Nc3 h6 3. d4 c6 4. e3 Bg4 5. f3 b5 6. e4 e6 7. exd5 Bd6 8. g3 c5 9. d5 c4 10. Ng5 Qxg5 11. dxe6 f5 - Oct 11 09:48 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … 9. d5 c4 10. Ng5 Qxg5 11. dxe6
1. Nh3 d5 2. Nc3 h6 3. d4 c6 4. e3 Bg4 5. f3 b5 6. e4 e6 7. exd5 Bd6 8. g3 c5 9. d5 c4 10. Ng5 Qxg5 11. dxe6