75.7M
positions
14.2M
practically solved
272.26T
engine nodes
2.1M
analyses
51
in queue
9
active workers
48
active cores
13.1M
nodes / sec
13.7
positions / min
82
proof number
3,796
disproof number
Root conquest: 0/20 first moves solved · 18.7% of tree positions solved · last 24h: 210,750 closures, 3.54T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 68 over 218 open obligations, of which 42 (19.3%) 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 44s (median of 150) · measured at 2026-10-06 00:00 UTC
Closures by source, last 24h (210695 of 210738 labelled): USER 99.7% (210080) · FILL 0.1% (189) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.2% (426) · last 7d (2097721 of 2097733): USER 99.8% (2092739) · FILL 0.0% (189) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.2% (4793). 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 f6 … Nh6 7. h3 a6 8. e4 g6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … Ng4 11. f5 Ne3 12. Bxe3 Qh4 (User) · 10.00B nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f6 … Nh6 7. h3 a6 8. e4 Rg8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 d6 2. Ng5 f6 … Nh6 7. h3 a6 8. e4 Rb8 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f6 … Nh6 7. h3 a6 8. e4 Rd8 (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 | 1026 | 2 | |
| g1h3 | unsolved | 820 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 441 | 2 | |
| e2e4 | unsolved | 418 | 2 | |
| b1c3 | unsolved | 105 | 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 | BManBJ 40.3% of the fleet | 1.42T | 8,635 |
| 2 | tenzink 19.9% of the fleet | 702.40B | 4,174 |
| 3 | randomchampgamer 18.9% of the fleet | 669.69B | 3,974 |
| 4 | RickEdinson 13.9% of the fleet | 490.91B | 2,964 |
| 5 | MoNiKaMaDnEsS 6.9% of the fleet | 244.44B | 1,634 |
| 6 | quasa 0.1% of the fleet | 3.35B | 27 |
| 7 | soothdest <0.1% of the fleet | 474.8M | 26 |
7 accounts · 3.54T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 33.2% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.3% of the fleet | 41.55T | 340,930 |
| 3 | BManBJ 14.1% of the fleet | 38.44T | 270,542 |
| 4 | auranvesdranor 11.5% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 5.3% of the fleet | 14.34T | 105,789 |
| 6 | JackIV 3.7% of the fleet | 10.06T | 67,859 |
| 7 | RickEdinson 3.5% of the fleet | 9.46T | 63,325 |
| 8 | gannet 2.7% of the fleet | 7.24T | 46,848 |
| 9 | MoNiKaMaDnEsS 2.0% of the fleet | 5.55T | 37,156 |
| 10 | NeoArcturus 1.5% of the fleet | 4.09T | 16,758 |
and 25 more.
35 accounts · 272.33T 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 21 proposals · see every proposal
Milestones
- Oct 06 00:43 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nc3 Na6 … Be7 8. Bb5 Kf8 9. Nxh8 Kg8
1. Nf3 f6 2. Nc3 Na6 3. Ng5 d6 4. Nf7 e6 5. Nb5 Nb8 6. Nxc7 f5 7. e4 Be7 8. Bb5 Kf8 9. Nxh8 Kg8 - Oct 06 00:43 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 Na6 … Kg8 10. Qh5 h6 11. Qf7 Kh8
1. Nf3 f6 2. Nc3 Na6 3. Ng5 d6 4. Nf7 e6 5. Nb5 Nb8 6. Nxc7 f5 7. e4 Be7 8. Bb5 Kf8 9. Nxh8 Kg8 10. Qh5 h6 11. Qf7 Kh8 - Oct 06 00:43 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 Na6 … 9. Nxh8 Kg8 10. Qh5 h6 11. Qf7
1. Nf3 f6 2. Nc3 Na6 3. Ng5 d6 4. Nf7 e6 5. Nb5 Nb8 6. Nxc7 f5 7. e4 Be7 8. Bb5 Kf8 9. Nxh8 Kg8 10. Qh5 h6 11. Qf7 - Oct 06 00:43 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 Na6 … Kf8 9. Nxh8 Kg8 10. Qh5 h6
1. Nf3 f6 2. Nc3 Na6 3. Ng5 d6 4. Nf7 e6 5. Nb5 Nb8 6. Nxc7 f5 7. e4 Be7 8. Bb5 Kf8 9. Nxh8 Kg8 10. Qh5 h6 - Oct 06 00:43 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 Na6 … 8. Bb5 Kf8 9. Nxh8 Kg8 10. Qh5
1. Nf3 f6 2. Nc3 Na6 3. Ng5 d6 4. Nf7 e6 5. Nb5 Nb8 6. Nxc7 f5 7. e4 Be7 8. Bb5 Kf8 9. Nxh8 Kg8 10. Qh5 - Oct 06 00:43 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nc3 Na6 … Be7 8. Bb5 Kf8 9. Nxh8 Rb8
1. Nf3 f6 2. Nc3 Na6 3. Ng5 d6 4. Nf7 e6 5. Nb5 Nb8 6. Nxc7 f5 7. e4 Be7 8. Bb5 Kf8 9. Nxh8 Rb8 - Oct 06 00:43 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 Na6 … 7. h3 Ng4 8. e4 a6 9. a3
1. Nf3 f6 2. Nc3 Na6 3. Ng5 d6 4. Nf7 e6 5. Nb5 Nb8 6. Nxc7 Nh6 7. h3 Ng4 8. e4 a6 9. a3 - Oct 06 00:43 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nc3 Na6 … Be7 8. Bb5 Kf8 9. Nxh8 Rd8
1. Nf3 f6 2. Nc3 Na6 3. Ng5 d6 4. Nf7 e6 5. Nb5 Nb8 6. Nxc7 f5 7. e4 Be7 8. Bb5 Kf8 9. Nxh8 Rd8 - Oct 06 00:43 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 Na6 … Bg5 12. exf5 g6 13. Qh6 Ke7
1. Nf3 f6 2. Nc3 Na6 3. Ng5 d6 4. Nf7 e6 5. Nb5 Nb8 6. Nxc7 f5 7. e4 Be7 8. Bb5 Kf8 9. Nxh8 Rd8 10. Qh5 Bh4 11. g3 Bg5 12. exf5 g6 13. Qh6 Ke7 - Oct 06 00:43 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 Na6 … 11. g3 Bg5 12. exf5 g6 13. Qh6
1. Nf3 f6 2. Nc3 Na6 3. Ng5 d6 4. Nf7 e6 5. Nb5 Nb8 6. Nxc7 f5 7. e4 Be7 8. Bb5 Kf8 9. Nxh8 Rd8 10. Qh5 Bh4 11. g3 Bg5 12. exf5 g6 13. Qh6 - Oct 06 00:43 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 Na6 … Bh4 11. g3 Bg5 12. exf5 g6
1. Nf3 f6 2. Nc3 Na6 3. Ng5 d6 4. Nf7 e6 5. Nb5 Nb8 6. Nxc7 f5 7. e4 Be7 8. Bb5 Kf8 9. Nxh8 Rd8 10. Qh5 Bh4 11. g3 Bg5 12. exf5 g6 - Oct 06 00:43 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 Na6 … 10. Qh5 Bh4 11. g3 Bg5 12. exf5
1. Nf3 f6 2. Nc3 Na6 3. Ng5 d6 4. Nf7 e6 5. Nb5 Nb8 6. Nxc7 f5 7. e4 Be7 8. Bb5 Kf8 9. Nxh8 Rd8 10. Qh5 Bh4 11. g3 Bg5 12. exf5