84.3M
positions
16.1M
practically solved
309.63T
engine nodes
2.4M
analyses
83
in queue
7
active workers
40
active cores
6.0M
nodes / sec
46.1
positions / min
126
proof number
4,648
disproof number
Root conquest: 0/20 first moves solved · 19.1% of tree positions solved · last 24h: 126,679 closures, 2.06T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 over 214 open obligations, of which 40 (18.7%) 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 2.0d (median of 6) · measured at 2026-10-15 11:00 UTC
Closures by source, last 24h (126648 of 126679 labelled): USER 83.2% (105321) · FILL 1.7% (2206) · AUTO 15.0% (19023) · SOLVE 0.0% (0) · NONE 0.1% (98) · last 7d (913271 of 913271): USER 95.5% (872546) · FILL 0.4% (3626) · AUTO 4.0% (36599) · SOLVE 0.0% (0) · NONE 0.1% (500). 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. Nc3 Nh6 … Qa3 15. O-O Re8 16. Ba6 Kf7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 Nh6 … Qa3 15. O-O Re8 16. Ba6 Qa5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. Nc3 Nh6 … Qa3 15. O-O Re8 16. Ba6 Qa4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. Nc3 Nh6 … e5 14. Bb5 Qa3 15. O-O c5 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 Nh6 … Qa3 15. O-O Re8 16. Ba6 Kf8 (User) · 128.0M nodes · MoNiKaMaDnEsS-DESKTOP-VG9VPVH-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 | 1123 | 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 34.4% of the fleet | 707.27B | 8,618 |
| 2 | randomchampgamer 29.7% of the fleet | 611.30B | 4,839 |
| 3 | RickEdinson 21.3% of the fleet | 438.29B | 3,503 |
| 4 | MoNiKaMaDnEsS 14.6% of the fleet | 300.74B | 2,179 |
4 accounts · 2.06T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 29.2% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 16.4% of the fleet | 50.64T | 353,159 |
| 3 | tenzink 13.8% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.1% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 6.3% of the fleet | 19.60T | 139,203 |
| 6 | Torom 5.1% of the fleet | 15.70T | 113,354 |
| 7 | RickEdinson 4.4% of the fleet | 13.49T | 89,366 |
| 8 | JackIV 3.2% of the fleet | 10.06T | 67,859 |
| 9 | MoNiKaMaDnEsS 2.5% of the fleet | 7.83T | 52,550 |
| 10 | gannet 2.3% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 309.68T 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 15 11:41 Solved: WHITE_WIN via MINIMAXview
1. e3 d6 2. Na3 Nc6 3. Bb5 d5
1. e3 d6 2. Na3 Nc6 3. Bb5 d5 - Oct 15 11:41 Solved: WHITE_WIN via MATE_PVview
1. e3 d6 2. Na3 Nc6 3. Bb5 d5 4. Qh5
1. e3 d6 2. Na3 Nc6 3. Bb5 d5 4. Qh5 - Oct 15 11:41 Solved: WHITE_WIN via MINIMAXview
1. Nf3 b5 2. g4 e6 3. g5 h6
1. Nf3 b5 2. g4 e6 3. g5 h6 - Oct 15 11:41 Solved: WHITE_WIN via MINIMAXview
1. Nh3 e6 2. e3 Bb4 … g5 5. Nxg5 Qf6 6. Bb5 Bc5
1. Nh3 e6 2. e3 Bb4 3. Qf3 Nf6 4. c3 g5 5. Nxg5 Qf6 6. Bb5 Bc5 - Oct 15 11:41 Solved: WHITE_WIN via MATE_PVview
1. Nf3 b5 2. g4 e6 3. g5 h6 4. Ne5 d5
1. Nf3 b5 2. g4 e6 3. g5 h6 4. Ne5 d5 - Oct 15 11:41 Solved: WHITE_WIN via MATE_PVview
1. Nf3 b5 2. g4 e6 3. g5 h6 4. Ne5
1. Nf3 b5 2. g4 e6 3. g5 h6 4. Ne5 - Oct 15 11:41 Solved: BLACK_WIN via MINIMAXview
1. Nf3 f6 2. e4 d5 3. Ng5 h5 4. exd5
1. Nf3 f6 2. e4 d5 3. Ng5 h5 4. exd5 - Oct 15 11:41 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 d5 3. Ng5 Bg4 4. exd5 h5 5. Ne6
1. Nf3 f6 2. e4 d5 3. Ng5 Bg4 4. exd5 h5 5. Ne6 - Oct 15 11:41 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 d5 3. Ng5 Bg4 4. exd5 h5
1. Nf3 f6 2. e4 d5 3. Ng5 Bg4 4. exd5 h5 - Oct 15 11:41 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 d5 3. Ng5 h5 4. exd5 Qd4 5. Ne6
1. Nf3 f6 2. e4 d5 3. Ng5 h5 4. exd5 Qd4 5. Ne6 - Oct 15 11:41 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 d5 3. Ng5 h5 4. exd5 Qd4
1. Nf3 f6 2. e4 d5 3. Ng5 h5 4. exd5 Qd4 - Oct 15 11:41 Solved: WHITE_WIN via MINIMAXview
1. Nh3 e6 2. e3 g6 … f6 6. Qd5 d6 7. c3 e5
1. Nh3 e6 2. e3 g6 3. Ng1 Nc6 4. Qh5 Nb8 5. Qg5 f6 6. Qd5 d6 7. c3 e5