85.5M
positions
16.3M
practically solved
312.89T
engine nodes
2.4M
analyses
13
in queue
5
active workers
28
active cores
4.1M
nodes / sec
5.0
positions / min
151
proof number
4,735
disproof number
Root conquest: 0/20 first moves solved · 19.1% of tree positions solved · last 24h: 103,247 closures, 2.26T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 over 210 open obligations, of which 39 (18.6%) 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 35.1d (median of 3) · measured at 2026-10-16 19:00 UTC
Closures by source, last 24h (103247 of 103247 labelled): USER 65.1% (67235) · FILL 1.7% (1717) · AUTO 33.2% (34233) · SOLVE 0.0% (0) · NONE 0.1% (62) · last 7d (728400 of 728400): USER 88.4% (644144) · FILL 0.9% (6203) · AUTO 10.7% (77579) · SOLVE 0.0% (0) · NONE 0.1% (474). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nf3 f6 2. e4 c6 … 10. Nf7 Qa5 11. b4 Qa4 12. Nxh8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … g6 9. Qg5 Qf6 10. Qxg6 Ke7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nh3 d5 2. Nc3 h6 … 14. a4 g5 15. a5 Ne7 16. b4 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. e4 e6 … g6 9. Qg5 Qf6 10. Qxg6 Kf7 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. d4 c6 2. Nc3 d5 … g6 7. O-O e6 8. d5 Nd7 (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 | 1092 | 2 | |
| g1h3 | unsolved | 763 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 400 | 2 | |
| e2e4 | unsolved | 400 | 2 | |
| b1c3 | unsolved | 138 | 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 64.2% of the fleet | 1.45T | 17,065 |
| 2 | RickEdinson 18.6% of the fleet | 419.89B | 4,961 |
| 3 | MoNiKaMaDnEsS 15.7% of the fleet | 353.85B | 3,864 |
| 4 | randomchampgamer 1.6% of the fleet | 35.95B | 243 |
4 accounts · 2.26T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 28.9% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 16.8% of the fleet | 52.56T | 373,850 |
| 3 | tenzink 13.7% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.0% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 6.3% of the fleet | 19.85T | 140,897 |
| 6 | Torom 5.0% of the fleet | 15.70T | 113,354 |
| 7 | RickEdinson 4.5% of the fleet | 14.06T | 95,272 |
| 8 | JackIV 3.2% of the fleet | 10.06T | 67,859 |
| 9 | MoNiKaMaDnEsS 2.7% of the fleet | 8.35T | 57,610 |
| 10 | gannet 2.3% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 312.93T 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 16 19:38 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. e4 e6 … g6 9. Qg5 Qf6 10. Qxg6 Nd8
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 Nh6 7. Ne5 fxe5 8. Qh5 g6 9. Qg5 Qf6 10. Qxg6 Nd8 - Oct 16 19:38 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Qf6 10. Qxg6 Nd8 11. Bh6 Bxh6
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 Nh6 7. Ne5 fxe5 8. Qh5 g6 9. Qg5 Qf6 10. Qxg6 Nd8 11. Bh6 Bxh6 - Oct 16 19:38 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 9. Qg5 Qf6 10. Qxg6 Nd8 11. Bh6
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 Nh6 7. Ne5 fxe5 8. Qh5 g6 9. Qg5 Qf6 10. Qxg6 Nd8 11. Bh6 - Oct 16 19:38 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. e4 e6 … g6 9. Qg5 Qf6 10. Qxg6 Nb8
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 Nh6 7. Ne5 fxe5 8. Qh5 g6 9. Qg5 Qf6 10. Qxg6 Nb8 - Oct 16 19:38 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Qf6 10. Qxg6 Nb8 11. Bh6 Bxh6
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 Nh6 7. Ne5 fxe5 8. Qh5 g6 9. Qg5 Qf6 10. Qxg6 Nb8 11. Bh6 Bxh6 - Oct 16 19:38 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 9. Qg5 Qf6 10. Qxg6 Nb8 11. Bh6
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 Nh6 7. Ne5 fxe5 8. Qh5 g6 9. Qg5 Qf6 10. Qxg6 Nb8 11. Bh6 - Oct 16 19:38 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. e4 e6 … g6 9. Qg5 Qf6 10. Qxg6 Ne7
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 Nh6 7. Ne5 fxe5 8. Qh5 g6 9. Qg5 Qf6 10. Qxg6 Ne7 - Oct 16 19:38 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Qf6 10. Qxg6 Ne7 11. Bh6 Bxh6
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 Nh6 7. Ne5 fxe5 8. Qh5 g6 9. Qg5 Qf6 10. Qxg6 Ne7 11. Bh6 Bxh6 - Oct 16 19:38 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 9. Qg5 Qf6 10. Qxg6 Ne7 11. Bh6
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 Nh6 7. Ne5 fxe5 8. Qh5 g6 9. Qg5 Qf6 10. Qxg6 Ne7 11. Bh6 - Oct 16 19:38 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. e4 e6 … g6 9. Qg5 Qf6 10. Qxg6 Ne5
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 Nh6 7. Ne5 fxe5 8. Qh5 g6 9. Qg5 Qf6 10. Qxg6 Ne5 - Oct 16 19:38 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Qf6 10. Qxg6 Ne5 11. Bh6 Ng4
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 Nh6 7. Ne5 fxe5 8. Qh5 g6 9. Qg5 Qf6 10. Qxg6 Ne5 11. Bh6 Ng4 - Oct 16 19:38 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 9. Qg5 Qf6 10. Qxg6 Ne5 11. Bh6
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 Nh6 7. Ne5 fxe5 8. Qh5 g6 9. Qg5 Qf6 10. Qxg6 Ne5 11. Bh6