60.2M
positions
10.1M
practically solved
216.62T
engine nodes
1.7M
analyses
3,312
in queue
9
active workers
46
active cores
12.7M
nodes / sec
10.5
positions / min
131
proof number
3,777
disproof number
Root conquest: 0/20 first moves solved · 16.8% of tree positions solved · last 24h: 6,965 closures, 144.98B nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 76 over 172 open obligations, of which 29 (16.9%) 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 5.2m (median of 137) · measured at 2026-09-25 14:00 UTC
Closures by source, last 24h (6963 of 6963 labelled): USER 99.8% (6952) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.2% (11) · last 7d (1036468 of 1036469): USER 99.9% (1035068) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.1% (1400). 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 … Bd7 9. Nxh8 e6 10. Bh6 Kd8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … Bd7 9. Nxh8 e6 10. Bh6 Be7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 d6 2. Ng5 f5 … Bd7 9. Nxh8 e6 10. Bh6 Ke7 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 c6 … Be6 12. exd5 O-O-O 13. O-O Bd6 (User) · 128.0M nodes · rhaxier-sectorcorruptor-atomicdb
- 1. Nf3 f6 2. Ne5 Nh6 … g6 9. Qh4 Rg8 10. Bd3 Ba3 (User) · 128.0M nodes · soothdest-DESKTOP-DC7DLU0-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 | 1083 | 2 | |
| g1h3 | unsolved | 773 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 435 | 2 | |
| e2e4 | unsolved | 417 | 2 | |
| b1c3 | unsolved | 72 | 2 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b2b4 | unsolved | 0 | 3 | |
| b1a3 | unsolved | 0 | 3 | |
| h2h3 | unsolved | -100 | 2 | |
| a2a3 | unsolved | -103 | 2 | |
| f2f3 | unsolved | -110 | 2 | |
| d2d3 | unsolved | -116 | 2 | |
| b2b3 | unsolved | -119 | 1 | |
| f2f4 | unsolved | -223 | 3 | |
| h2h4 | unsolved | -500 | 2 | |
| a2a4 | unsolved | -502 | 2 | |
| g2g4 | unsolved | -600 | 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 59.9% of the fleet | 86.85B | 472 |
| 2 | tenzink 24.9% of the fleet | 36.14B | 279 |
| 3 | rhaxier 14.2% of the fleet | 20.55B | 112 |
| 4 | soothdest 1.0% of the fleet | 1.45B | 13 |
4 accounts · 144.98B nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 36.8% of the fleet | 79.65T | 677,611 |
| 2 | tenzink 16.2% of the fleet | 35.17T | 297,314 |
| 3 | auranvesdranor 11.6% of the fleet | 25.14T | 181,535 |
| 4 | BManBJ 11.4% of the fleet | 24.68T | 168,957 |
| 5 | JackIV 4.6% of the fleet | 10.06T | 67,859 |
| 6 | randomchampgamer 3.8% of the fleet | 8.31T | 60,138 |
| 7 | RickEdinson 2.9% of the fleet | 6.32T | 41,667 |
| 8 | NeoArcturus 1.9% of the fleet | 4.09T | 16,756 |
| 9 | MoNiKaMaDnEsS 1.8% of the fleet | 3.96T | 25,268 |
| 10 | ijh 1.6% of the fleet | 3.57T | 37,348 |
and 22 more.
32 accounts · 216.62T 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 · 16 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
- Refuting 1... d61. Nf3 d6 2. Nc3proposed by randomchampgamer · 3 votes
- The weaker of the two f-pawn advances for 1. ...d61. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4proposed by MoNiKaMaDnEsS · 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
- Is Nh3 h6 e3 e6 Nc3 a draw?1. Nh3 e6 2. e3 h6 3. Nc3proposed by soothdest · 3 votes
Showing the 6 most voted of 20 proposals · see every proposal
Milestones
- Sep 25 14:07 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … Bd7 9. Nxh8 e6 10. Bh6 Kf7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 g6 6. d4 h5 7. Bxc6 Nc6 8. Qe2 Bd7 9. Nxh8 e6 10. Bh6 Kf7 - Sep 25 14:07 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … e6 10. Bh6 Kf7 11. Qg4 hxg4
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 g6 6. d4 h5 7. Bxc6 Nc6 8. Qe2 Bd7 9. Nxh8 e6 10. Bh6 Kf7 11. Qg4 hxg4 - Sep 25 14:07 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 9. Nxh8 e6 10. Bh6 Kf7 11. Qg4
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 g6 6. d4 h5 7. Bxc6 Nc6 8. Qe2 Bd7 9. Nxh8 e6 10. Bh6 Kf7 11. Qg4 - Sep 25 14:07 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … e6 10. Bh6 Kf7 11. d5 Bxh6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 g6 6. d4 h5 7. Bxc6 Nc6 8. Qe2 Bd7 9. Nxh8 e6 10. Bh6 Kf7 11. d5 Bxh6 - Sep 25 14:07 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 9. Nxh8 e6 10. Bh6 Kf7 11. d5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 g6 6. d4 h5 7. Bxc6 Nc6 8. Qe2 Bd7 9. Nxh8 e6 10. Bh6 Kf7 11. d5 - Sep 25 14:07 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … e6 10. Bh6 Kf7 11. exf5 Bxh6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 g6 6. d4 h5 7. Bxc6 Nc6 8. Qe2 Bd7 9. Nxh8 e6 10. Bh6 Kf7 11. exf5 Bxh6 - Sep 25 14:07 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 9. Nxh8 e6 10. Bh6 Kf7 11. exf5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 g6 6. d4 h5 7. Bxc6 Nc6 8. Qe2 Bd7 9. Nxh8 e6 10. Bh6 Kf7 11. exf5 - Sep 25 14:07 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … e6 10. Bh6 Kf7 11. Qc4 Bxh6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 g6 6. d4 h5 7. Bxc6 Nc6 8. Qe2 Bd7 9. Nxh8 e6 10. Bh6 Kf7 11. Qc4 Bxh6 - Sep 25 14:07 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 9. Nxh8 e6 10. Bh6 Kf7 11. Qc4
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 g6 6. d4 h5 7. Bxc6 Nc6 8. Qe2 Bd7 9. Nxh8 e6 10. Bh6 Kf7 11. Qc4 - Sep 25 14:07 Solved: BLACK_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f6 … 8. Na4 Qb4 9. h3 Bd5 10. e5
1. Nf3 d6 2. Ng5 f6 3. f3 Bg4 4. Nxh7 c6 5. Nc3 Qa5 6. e4 Be6 7. g4 Qb5 8. Na4 Qb4 9. h3 Bd5 10. e5 - Sep 25 14:07 Solved: BLACK_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f6 … 10. c4 Bd5 11. Ba3 Qd3 12. Nc5
1. Nf3 d6 2. Ng5 f6 3. f3 Bg4 4. Nxh7 c6 5. Nc3 Bf5 6. e4 Qb6 7. b4 Be6 8. Be2 Qe3 9. Na4 Na6 10. c4 Bd5 11. Ba3 Qd3 12. Nc5 - Sep 25 14:07 Solved: BLACK_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f6 … 10. c4 Qd3 11. Qb3 Nd7 12. a4
1. Nf3 d6 2. Ng5 f6 3. f3 Bg4 4. Nxh7 c6 5. Nc3 Qa5 6. e4 Be6 7. b4 Qa3 8. Nb5 Bh3 9. Bb2 a6 10. c4 Qd3 11. Qb3 Nd7 12. a4