81.4M
positions
15.7M
practically solved
296.70T
engine nodes
2.3M
analyses
76
in queue
7
active workers
42
active cores
8.8M
nodes / sec
16.4
positions / min
99
proof number
4,519
disproof number
Root conquest: 0/20 first moves solved · 19.2% of tree positions solved · last 24h: 104,465 closures, 5.05T 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 08:00 UTC
Closures by source, last 24h (104429 of 104430 labelled): USER 84.1% (87848) · FILL 0.5% (490) · AUTO 15.4% (16036) · SOLVE 0.0% (0) · NONE 0.1% (55) · last 7d (1655097 of 1655103): USER 98.1% (1623008) · FILL 0.2% (2561) · AUTO 1.7% (28013) · SOLVE 0.0% (0) · NONE 0.1% (1515). 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 … Kg8 15. Kh1 cxb5 16. c4 Nd7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … 15. Kh1 Rc8 16. g3 cxb5 17. c4 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … Kg8 15. Kh1 cxb5 16. c4 Nh7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 d6 2. Ng5 f5 … Kg8 15. Kh1 cxb5 16. c4 Ne8 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Kg8 15. Kh1 cxb5 16. c4 Re8 (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 | 938 | 2 | |
| g1h3 | unsolved | 821 | 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 51.9% of the fleet | 2.62T | 18,593 |
| 2 | BManBJ 22.5% of the fleet | 1.14T | 9,482 |
| 3 | randomchampgamer 11.4% of the fleet | 576.08B | 3,602 |
| 4 | RickEdinson 7.5% of the fleet | 377.34B | 2,850 |
| 5 | MoNiKaMaDnEsS 6.7% of the fleet | 340.42B | 2,678 |
| 6 | soothdest <0.1% of the fleet | 25.3M | 4 |
6 accounts · 5.05T 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 | 46.08T | 322,429 |
| 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 | 17.75T | 128,747 |
| 6 | Torom 4.0% of the fleet | 11.88T | 87,075 |
| 7 | RickEdinson 4.0% of the fleet | 11.78T | 78,508 |
| 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 | 46,010 |
and 25 more.
35 accounts · 296.73T 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 08:53 Solved: BLACK_WIN via MATE_PVview
1. e3 c6 2. Qg4 e6 … 4. Qxe6 d5 5. Nh3 Qf6 6. a3
1. e3 c6 2. Qg4 e6 3. Qh3 g6 4. Qxe6 d5 5. Nh3 Qf6 6. a3 - Oct 11 08:53 Solved: WHITE_WIN via MINIMAXview
1. e3 e5 2. Qf3 Qf6 3. Bc4 d5 4. b4 d4
1. e3 e5 2. Qf3 Qf6 3. Bc4 d5 4. b4 d4 - Oct 11 08:53 Solved: WHITE_WIN via MATE_PVview
1. e3 e5 2. Qf3 Qf6 3. Bc4 d5 4. b4 d4 5. Be6 Qxf3
1. e3 e5 2. Qf3 Qf6 3. Bc4 d5 4. b4 d4 5. Be6 Qxf3 - Oct 11 08:53 Solved: WHITE_WIN via MATE_PVview
1. e3 e5 2. Qf3 Qf6 3. Bc4 d5 4. b4 d4 5. Be6
1. e3 e5 2. Qf3 Qf6 3. Bc4 d5 4. b4 d4 5. Be6 - Oct 11 08:53 Solved: BLACK_WIN via MATE_PVview
1. e3 c6 2. Qg4 e6 … 4. Qxe6 d5 5. Nh3 Qh4 6. c3
1. e3 c6 2. Qg4 e6 3. Qh3 g6 4. Qxe6 d5 5. Nh3 Qh4 6. c3 - Oct 11 08:53 Solved: BLACK_WIN via MATE_PVview
1. e3 c6 2. Qg4 e6 … 4. Qxe6 d5 5. Nh3 Qh4 6. b3
1. e3 c6 2. Qg4 e6 3. Qh3 g6 4. Qxe6 d5 5. Nh3 Qh4 6. b3 - Oct 11 08:53 Solved: BLACK_WIN via MATE_PVview
1. e3 c6 2. Qg4 e6 … 4. Qxe6 d5 5. Nh3 Qh4 6. a3
1. e3 c6 2. Qg4 e6 3. Qh3 g6 4. Qxe6 d5 5. Nh3 Qh4 6. a3 - Oct 11 08:53 Solved: BLACK_WIN via MATE_PVview
1. e3 c6 2. Qg4 e6 … 5. Nh3 Qh4 6. Kd1 Bg4 7. f3
1. e3 c6 2. Qg4 e6 3. Qh3 g6 4. Qxe6 d5 5. Nh3 Qh4 6. Kd1 Bg4 7. f3 - Oct 11 08:53 Solved: BLACK_WIN via MATE_PVview
1. e3 c6 2. Qg4 e6 … d5 5. Nh3 Qh4 6. Kd1 Bg4
1. e3 c6 2. Qg4 e6 3. Qh3 g6 4. Qxe6 d5 5. Nh3 Qh4 6. Kd1 Bg4 - Oct 11 08:53 Solved: BLACK_WIN via MATE_PVview
1. e3 c6 2. Qg4 e6 … 4. Qxe6 d5 5. Nh3 Qh4 6. Kd1
1. e3 c6 2. Qg4 e6 3. Qh3 g6 4. Qxe6 d5 5. Nh3 Qh4 6. Kd1 - Oct 11 08:53 Solved: WHITE_WIN via MINIMAXview
1. e3 e6 2. Qh5 g6 3. Qg5 Nc6 4. Qf5 exf5 5. Bc4 Nb4
1. e3 e6 2. Qh5 g6 3. Qg5 Nc6 4. Qf5 exf5 5. Bc4 Nb4 - Oct 11 08:53 Solved: BLACK_WIN via MATE_PVview
1. e3 c6 2. Qg4 e6 … 4. Qxe6 d5 5. Nh3 Qa5 6. b3
1. e3 c6 2. Qg4 e6 3. Qh3 g6 4. Qxe6 d5 5. Nh3 Qa5 6. b3