85.4M
positions
16.3M
practically solved
312.45T
engine nodes
2.4M
analyses
221
in queue
6
active workers
36
active cores
25.1M
nodes / sec
9.2
positions / min
154
proof number
4,668
disproof number
Root conquest: 0/20 first moves solved · 19.1% of tree positions solved · last 24h: 102,891 closures, 2.32T 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 · measured at 2026-10-16 15:00 UTC
Closures by source, last 24h (102483 of 102483 labelled): USER 68.9% (70659) · FILL 1.5% (1539) · AUTO 29.5% (30232) · SOLVE 0.0% (0) · NONE 0.1% (53) · last 7d (787169 of 787169): USER 89.9% (707398) · FILL 0.8% (5922) · AUTO 9.3% (73372) · SOLVE 0.0% (0) · NONE 0.1% (477). 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 … 6. exf5 Bf5 7. d3 Nf6 8. Rf1 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nh3 d5 2. Nc3 h6 … 9. h3 Nf6 10. c3 Nh5 11. g3 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 e5 2. e4 Be7 … f5 6. exf5 Kf8 7. Qxd7 h6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nh3 h6 2. Nc3 e6 … 8. f3 Qxe5 9. O-O a5 10. e4 (User) · 10.00B nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 e5 2. e4 Be7 … f5 6. exf5 Kf8 7. Qxd7 e4 (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 | 1109 | 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 60.9% of the fleet | 1.41T | 16,340 |
| 2 | RickEdinson 18.2% of the fleet | 421.63B | 4,555 |
| 3 | MoNiKaMaDnEsS 15.1% of the fleet | 350.86B | 3,629 |
| 4 | randomchampgamer 5.8% of the fleet | 134.90B | 778 |
4 accounts · 2.32T 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 16.7% of the fleet | 52.33T | 372,004 |
| 3 | tenzink 13.7% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.0% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 6.4% 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 | 13.99T | 94,606 |
| 8 | JackIV 3.2% of the fleet | 10.06T | 67,859 |
| 9 | MoNiKaMaDnEsS 2.6% of the fleet | 8.27T | 56,943 |
| 10 | gannet 2.3% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 312.56T 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 16:07 Solved: WHITE_WIN via MATE_PVview
1. g3 e5 2. Nh3 Qg5 … Nf5 6. Qg5 Bb4 7. c3 Ncd4
1. g3 e5 2. Nh3 Qg5 3. Nxg5 Nc6 4. e4 Nh6 5. Qg4 Nf5 6. Qg5 Bb4 7. c3 Ncd4 - Oct 16 16:07 Solved: WHITE_WIN via MATE_PVview
1. g3 e5 2. Nh3 Qg5 … Nf5 6. Qg5 Bb4 7. c3 b5
1. g3 e5 2. Nh3 Qg5 3. Nxg5 Nc6 4. e4 Nh6 5. Qg4 Nf5 6. Qg5 Bb4 7. c3 b5 - Oct 16 16:07 Solved: WHITE_WIN via MATE_PVview
1. g3 e5 2. Nh3 Qg5 … f6 9. Qg4 f5 10. Qg5 d5
1. g3 e5 2. Nh3 Qg5 3. Nxg5 Nc6 4. e4 Nh6 5. Qg4 Nf5 6. Qg5 Bb4 7. c3 Ne3 8. fxe3 f6 9. Qg4 f5 10. Qg5 d5 - Oct 16 16:07 Solved: WHITE_WIN via MATE_PVview
1. g3 e5 2. Nh3 Qg5 … 8. fxe3 f6 9. Qg4 f5 10. Qg5
1. g3 e5 2. Nh3 Qg5 3. Nxg5 Nc6 4. e4 Nh6 5. Qg4 Nf5 6. Qg5 Bb4 7. c3 Ne3 8. fxe3 f6 9. Qg4 f5 10. Qg5 - Oct 16 16:07 Solved: WHITE_WIN via MATE_PVview
1. g3 e5 2. Nh3 Qg5 … Ne3 8. fxe3 f6 9. Qg4 f5
1. g3 e5 2. Nh3 Qg5 3. Nxg5 Nc6 4. e4 Nh6 5. Qg4 Nf5 6. Qg5 Bb4 7. c3 Ne3 8. fxe3 f6 9. Qg4 f5 - Oct 16 16:07 Solved: WHITE_WIN via MATE_PVview
1. g3 e5 2. Nh3 Qg5 … 7. c3 Ne3 8. fxe3 f6 9. Qg4
1. g3 e5 2. Nh3 Qg5 3. Nxg5 Nc6 4. e4 Nh6 5. Qg4 Nf5 6. Qg5 Bb4 7. c3 Ne3 8. fxe3 f6 9. Qg4 - Oct 16 16:07 Solved: WHITE_WIN via MATE_PVview
1. g3 e5 2. Nh3 Qg5 … Nf5 6. Qg5 Bb4 7. c3 Ne3
1. g3 e5 2. Nh3 Qg5 3. Nxg5 Nc6 4. e4 Nh6 5. Qg4 Nf5 6. Qg5 Bb4 7. c3 Ne3 - Oct 16 16:04 Solved: BLACK_WIN via MINIMAXview
1. Nf3 f6 2. Ne5 fxe5 … 8. Qxc7 Kd8 9. f3 Ng4 10. Ke2
1. Nf3 f6 2. Ne5 fxe5 3. Nc3 d5 4. e3 b5 5. Qh5 g6 6. Qe5 Be6 7. b3 Nf6 8. Qxc7 Kd8 9. f3 Ng4 10. Ke2 - Oct 16 16:03 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Ne5 fxe5 … Kd8 9. f3 Ng4 10. Ba3 g5
1. Nf3 f6 2. Ne5 fxe5 3. Nc3 d5 4. e3 b5 5. Qh5 g6 6. Qe5 Be6 7. b3 Nf6 8. Qxc7 Kd8 9. f3 Ng4 10. Ba3 g5 - Oct 16 16:03 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Ne5 fxe5 … Kd8 9. f3 Ng4 10. Ba3 d4
1. Nf3 f6 2. Ne5 fxe5 3. Nc3 d5 4. e3 b5 5. Qh5 g6 6. Qe5 Be6 7. b3 Nf6 8. Qxc7 Kd8 9. f3 Ng4 10. Ba3 d4 - Oct 16 15:59 Solved: BLACK_WIN via MATE_PVview
1. e4 c6 2. Nf3 e5 … 10. Nb5 Nd7 11. d4 Ng4 12. a3
1. e4 c6 2. Nf3 e5 3. Ng5 Be7 4. Bb5 Bxg5 5. Qh5 g6 6. Qh3 f5 7. exf5 Kf8 8. Qxd7 cxb5 9. Na3 Nh6 10. Nb5 Nd7 11. d4 Ng4 12. a3 - Oct 16 15:58 Solved: BLACK_WIN via MATE_PVview
1. Nh3 e6 2. e3 g6 … 16. g4 Nh6 17. Nxg6 Bd6 18. b3
1. Nh3 e6 2. e3 g6 3. Bb5 c6 4. Qh5 h6 5. Nc3 Bb4 6. Qe5 Qf6 7. g3 Qf4 8. f3 Qxe5 9. O-O a5 10. Ba6 bxa6 11. Nb5 Kf8 12. c3 Na6 13. Nc7 f6 14. Nf4 h5 15. a3 h4 16. g4 Nh6 17. Nxg6 Bd6 18. b3