74.0M
positions
13.8M
practically solved
265.26T
engine nodes
2.1M
analyses
1,526
in queue
8
active workers
48
active cores
9.1M
nodes / sec
18.4
positions / min
82
proof number
3,797
disproof number
Root conquest: 0/20 first moves solved · 18.6% of tree positions solved · last 24h: 117,537 closures, 3.39T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 69 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 · positions a visitor asked for close in 30.4m (median of 19) · measured at 2026-10-03 23:00 UTC
Closures by source, last 24h (117537 of 117537 labelled): USER 99.2% (116600) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.8% (937) · last 7d (2347733 of 2347733): USER 99.8% (2341990) · FILL 0.0% (477) · AUTO 0.0% (1085) · SOLVE 0.0% (0) · NONE 0.2% (4181). 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. e4 e6 3. Nd4 Bd6 (User) · 10.00B nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. Ne5 fxe5 … Bf5 25. b5 b6 26. g3 Bh3 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- deep line, ply ≥50 · … b5 g5 f5 g4 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. Ne5 fxe5 … Bc2 25. a5 g5 26. f5 g4 (User) · 128.0M nodes · randomchampgamer-2026PC-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … 13. Qb5 a6 14. Qc4 d5 15. Qc5 (User) · 128.0M 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 | 1101 | 2 | |
| g1h3 | unsolved | 724 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 440 | 2 | |
| e2e4 | unsolved | 418 | 2 | |
| b1c3 | unsolved | 114 | 2 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b1a3 | unsolved | 0 | 3 | |
| 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 | BManBJ 42.6% of the fleet | 1.45T | 10,774 |
| 2 | randomchampgamer 20.9% of the fleet | 709.91B | 5,185 |
| 3 | tenzink 20.0% of the fleet | 676.96B | 4,695 |
| 4 | RickEdinson 14.7% of the fleet | 497.47B | 3,469 |
| 5 | MoNiKaMaDnEsS 1.2% of the fleet | 41.03B | 322 |
| 6 | auranvesdranor 0.7% of the fleet | 22.26B | 175 |
6 accounts · 3.39T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 34.0% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.1% of the fleet | 40.11T | 331,179 |
| 3 | BManBJ 13.4% of the fleet | 35.60T | 251,285 |
| 4 | auranvesdranor 11.8% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 4.9% of the fleet | 12.96T | 96,447 |
| 6 | JackIV 3.8% of the fleet | 10.06T | 67,859 |
| 7 | RickEdinson 3.2% of the fleet | 8.49T | 57,022 |
| 8 | gannet 2.7% of the fleet | 7.24T | 46,848 |
| 9 | MoNiKaMaDnEsS 2.0% of the fleet | 5.21T | 34,838 |
| 10 | NeoArcturus 1.5% of the fleet | 4.09T | 16,758 |
and 25 more.
35 accounts · 265.36T 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 · 4 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
Showing the 6 most voted of 21 proposals · see every proposal
Milestones
- Oct 03 23:49 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f6 … Qg6 11. Bxb7 Bd5 12. Qe6 cxb4
1. Nf3 d6 2. Ng5 f6 3. f3 Bg4 4. Nxh7 c6 5. Nc3 Qa5 6. e4 Be6 7. b4 Qb5 8. f4 Qh5 9. Qg4 c5 10. Ba6 Qg6 11. Bxb7 Bd5 12. Qe6 cxb4 - Oct 03 23:48 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … d4 18. Qc7 Rd7 19. Qe5 Kh7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Kf8 10. Bxh6 f4 11. g4 Kg8 12. Qe2 Kh8 13. Qb5 a6 14. Qb3 e6 15. d5 Rd8 16. dxe6 d5 17. Qc3 d4 18. Qc7 Rd7 19. Qe5 Kh7 - Oct 03 23:48 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 17. Qc3 d4 18. Qc7 Rd7 19. Qe5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Kf8 10. Bxh6 f4 11. g4 Kg8 12. Qe2 Kh8 13. Qb5 a6 14. Qb3 e6 15. d5 Rd8 16. dxe6 d5 17. Qc3 d4 18. Qc7 Rd7 19. Qe5 - Oct 03 23:48 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … d5 17. Qc3 d4 18. Qc7 Rd7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Kf8 10. Bxh6 f4 11. g4 Kg8 12. Qe2 Kh8 13. Qb5 a6 14. Qb3 e6 15. d5 Rd8 16. dxe6 d5 17. Qc3 d4 18. Qc7 Rd7 - Oct 03 23:48 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 16. dxe6 d5 17. Qc3 d4 18. Qc7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Kf8 10. Bxh6 f4 11. g4 Kg8 12. Qe2 Kh8 13. Qb5 a6 14. Qb3 e6 15. d5 Rd8 16. dxe6 d5 17. Qc3 d4 18. Qc7 - Oct 03 23:48 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Rd8 16. dxe6 d5 17. Qc3 d4
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Kf8 10. Bxh6 f4 11. g4 Kg8 12. Qe2 Kh8 13. Qb5 a6 14. Qb3 e6 15. d5 Rd8 16. dxe6 d5 17. Qc3 d4 - Oct 03 23:48 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 15. d5 Rd8 16. dxe6 d5 17. Qc3
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Kf8 10. Bxh6 f4 11. g4 Kg8 12. Qe2 Kh8 13. Qb5 a6 14. Qb3 e6 15. d5 Rd8 16. dxe6 d5 17. Qc3 - Oct 03 23:48 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … e6 15. d5 Rd8 16. dxe6 d5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Kf8 10. Bxh6 f4 11. g4 Kg8 12. Qe2 Kh8 13. Qb5 a6 14. Qb3 e6 15. d5 Rd8 16. dxe6 d5 - Oct 03 23:48 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 14. Qb3 e6 15. d5 Rd8 16. dxe6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Kf8 10. Bxh6 f4 11. g4 Kg8 12. Qe2 Kh8 13. Qb5 a6 14. Qb3 e6 15. d5 Rd8 16. dxe6 - Oct 03 23:48 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … a6 14. Qb3 e6 15. d5 Rd8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Kf8 10. Bxh6 f4 11. g4 Kg8 12. Qe2 Kh8 13. Qb5 a6 14. Qb3 e6 15. d5 Rd8 - Oct 03 23:48 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … d5 19. gxf6 d4 20. Qc7 a5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Kf8 10. Bxh6 f4 11. g4 Kg8 12. Qe2 Kh8 13. Qb5 a6 14. Qb3 e6 15. d5 Re8 16. dxe6 Re6 17. Qc3 Rf6 18. g5 d5 19. gxf6 d4 20. Qc7 a5 - Oct 03 23:48 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 18. g5 d5 19. gxf6 d4 20. Qc7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Kf8 10. Bxh6 f4 11. g4 Kg8 12. Qe2 Kh8 13. Qb5 a6 14. Qb3 e6 15. d5 Re8 16. dxe6 Re6 17. Qc3 Rf6 18. g5 d5 19. gxf6 d4 20. Qc7