85.2M
positions
16.2M
practically solved
312.05T
engine nodes
2.4M
analyses
0
in queue
5
active workers
28
active cores
21.3M
nodes / sec
10.2
positions / min
154
proof number
4,703
disproof number
Root conquest: 0/20 first moves solved · 19.1% of tree positions solved · last 24h: 118,353 closures, 2.50T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 over 211 open obligations, of which 40 (19.0%) sit at or below dn 2, one unanswered question from falling over · 0 open nodes on impossible numbers · measured at 2026-10-16 10:00 UTC
Closures by source, last 24h (118353 of 118353 labelled): USER 72.6% (85907) · FILL 1.7% (1983) · AUTO 25.7% (30406) · SOLVE 0.0% (0) · NONE 0.0% (57) · last 7d (839087 of 839087): USER 91.7% (769258) · FILL 0.7% (5504) · AUTO 7.6% (63831) · SOLVE 0.0% (0) · NONE 0.1% (494). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nh3 d5 2. Nc3 h6 … Rb8 16. Qg4 g5 17. Nc8 Kg7 (User) · 512.0M nodes · BManBJ-Blake-atomicdb
- 1. Nh3 d5 2. Nc3 h6 … Re8 21. Kh1 a5 22. a4 Qa6 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#1
- 1. e4 c6 2. Nf3 e5 … 17. Kb1 a6 18. Bd7 Rg8 19. e5 (Fill) · 512.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nh3 d5 2. Nc3 h6 … Nf2 15. O-O g6 16. b3 f4 (Auto) · 8.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. Ne5 fxe5 … 14. e5 a6 15. Qb3 O-O 16. exd6 (User) · 512.0M nodes · RickEdinson-MSI-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 | 1102 | 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 56.7% of the fleet | 1.42T | 15,349 |
| 2 | RickEdinson 16.8% of the fleet | 420.77B | 4,265 |
| 3 | MoNiKaMaDnEsS 16.2% of the fleet | 404.38B | 4,011 |
| 4 | randomchampgamer 10.3% of the fleet | 256.53B | 2,002 |
| 5 | NeoArcturus <0.1% of the fleet | 144.9M | 4 |
5 accounts · 2.50T 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 | 52.02T | 367,668 |
| 3 | tenzink 13.7% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.1% 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 | 13.90T | 93,369 |
| 8 | JackIV 3.2% of the fleet | 10.06T | 67,859 |
| 9 | MoNiKaMaDnEsS 2.6% of the fleet | 8.22T | 56,311 |
| 10 | gannet 2.3% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 312.11T 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 10:50 VALUE_CASCADEview
1. Nh3 d5 2. Nc3 h6 … Nf2 15. O-O b6 16. a3 f4
1. Nh3 d5 2. Nc3 h6 3. d4 c6 4. e3 Bg4 5. f3 e6 6. Nb5 cxb5 7. Bb5 Nc6 8. c3 f5 9. g3 Bb4 10. e4 dxe4 11. Ng5 Nf6 12. Nf7 O-O 13. h3 Ne4 14. Bg5 Nf2 15. O-O b6 16. a3 f4 - Oct 16 10:50 VALUE_CASCADEview
1. Nh3 d5 2. Nc3 h6 … Nf2 15. O-O a5 16. c4 a4
1. Nh3 d5 2. Nc3 h6 3. d4 c6 4. e3 Bg4 5. f3 e6 6. Nb5 cxb5 7. Bb5 Nc6 8. c3 f5 9. g3 Bb4 10. e4 dxe4 11. Ng5 Nf6 12. Nf7 O-O 13. h3 Ne4 14. Bg5 Nf2 15. O-O a5 16. c4 a4 - Oct 16 10:50 VALUE_CASCADEview
1. Nf3 f6 2. Ne5 fxe5 … a6 15. Qb3 O-O 16. exd6 axb5
1. Nf3 f6 2. Ne5 fxe5 3. e4 c6 4. Na3 d6 5. Nb5 cxb5 6. d4 Nc6 7. Bb5 Bg4 8. f3 e6 9. h4 Bh5 10. O-O Nf6 11. g4 g6 12. c4 Bh6 13. gxh5 h6 14. e5 a6 15. Qb3 O-O 16. exd6 axb5 - Oct 16 10:49 VALUE_CASCADEview
1. e3 e6 2. Qh5 g6 3. Nf3 Qh4 4. g3 f6 5. Qf5 e5
1. e3 e6 2. Qh5 g6 3. Nf3 Qh4 4. g3 f6 5. Qf5 e5 - Oct 16 10:49 Solved: WHITE_WIN via MINIMAXview
1. e3 e6 2. Qh5 g6 3. Nf3 Qh4 4. g3 f6 5. Qf5 e5
1. e3 e6 2. Qh5 g6 3. Nf3 Qh4 4. g3 f6 5. Qf5 e5 - Oct 16 10:49 Solved: WHITE_WIN via MATE_PVview
1. e3 e6 2. Qh5 g6 … f6 5. Qf5 e5 6. Bh3 d5
1. e3 e6 2. Qh5 g6 3. Nf3 Qh4 4. g3 f6 5. Qf5 e5 6. Bh3 d5 - Oct 16 10:49 Solved: WHITE_WIN via MATE_PVview
1. e3 e6 2. Qh5 g6 … 4. g3 f6 5. Qf5 e5 6. Bh3
1. e3 e6 2. Qh5 g6 3. Nf3 Qh4 4. g3 f6 5. Qf5 e5 6. Bh3 - Oct 16 10:49 Solved: WHITE_WIN via MATE_PVview
1. e3 e6 2. Qh5 g6 … f6 5. Qf5 e5 6. Bb5 gxf5
1. e3 e6 2. Qh5 g6 3. Nf3 Qh4 4. g3 f6 5. Qf5 e5 6. Bb5 gxf5 - Oct 16 10:49 Solved: WHITE_WIN via MATE_PVview
1. e3 e6 2. Qh5 g6 … 4. g3 f6 5. Qf5 e5 6. Bb5
1. e3 e6 2. Qh5 g6 3. Nf3 Qh4 4. g3 f6 5. Qf5 e5 6. Bb5 - Oct 16 10:49 VALUE_CASCADEview
1. Nc3 g6 2. e3 e5 … 4. Bb5 Nc6 5. Qg5 Nh6 6. b3
1. Nc3 g6 2. e3 e5 3. Qh5 f6 4. Bb5 Nc6 5. Qg5 Nh6 6. b3 - Oct 16 10:49 VALUE_CASCADEview
1. e4 c6 2. Nf3 e5 … 17. f5 Ne2 18. Kb1 Rg8 19. f6
1. e4 c6 2. Nf3 e5 3. Nc3 f6 4. Nd5 cxd5 5. Bb5 g6 6. d4 Nc6 7. Be3 Bb4 8. c3 h5 9. Ng5 d6 10. dxe5 fxg5 11. Qd5 Be6 12. Bg5 Nf6 13. Bxf6 Qf6 14. f4 Kd8 15. Qf7 Qxf7 16. O-O-O Nd4 17. f5 Ne2 18. Kb1 Rg8 19. f6 - Oct 16 10:48 VALUE_CASCADEview
1. Nh3 d5 2. Nc3 h6 … 14. Bg5 Nf2 15. O-O Qa5 16. f4
1. Nh3 d5 2. Nc3 h6 3. d4 c6 4. e3 Bg4 5. f3 e6 6. Nb5 cxb5 7. Bb5 Nc6 8. c3 f5 9. g3 Bb4 10. e4 dxe4 11. Ng5 Nf6 12. Nf7 O-O 13. h3 Ne4 14. Bg5 Nf2 15. O-O Qa5 16. f4