76.3M
positions
14.4M
practically solved
274.73T
engine nodes
2.1M
analyses
2,627
in queue
9
active workers
48
active cores
24.3M
nodes / sec
12.8
positions / min
82
proof number
3,796
disproof number
Root conquest: 0/20 first moves solved · 18.9% of tree positions solved · last 24h: 243,458 closures, 3.61T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 69 over 220 open obligations, of which 42 (19.1%) 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 52s (median of 142) · measured at 2026-10-06 16:00 UTC
Closures by source, last 24h (243458 of 243458 labelled): USER 99.8% (243073) · FILL 0.1% (294) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.0% (91) · last 7d (2084189 of 2084189): USER 99.8% (2079133) · FILL 0.0% (294) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.2% (4762). 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 c6 … Bxh3 15. Nf7 Nc2 16. Nxd8 e5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 c6 … Bxh3 15. Nf7 Nc2 16. Nxd8 a5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. e4 e6 … 30. cxb6 Kd4 31. g4 Rf7 32. g5 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#2
- deep line, ply ≥96 · … Kb5 Ra5 Kb6 Ra6 (User) · 512.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nh3 d5 2. Nc3 h6 … a5 18. Bd2 Ba6 19. Bxa5 Ba3 (User) · 128.0M nodes · randomchampgamer-2026PC-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 | 1082 | 2 | |
| g1h3 | unsolved | 767 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 441 | 2 | |
| e2e4 | unsolved | 418 | 2 | |
| b1c3 | unsolved | 105 | 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 | BManBJ 43.2% of the fleet | 1.56T | 9,505 |
| 2 | tenzink 18.9% of the fleet | 680.58B | 4,051 |
| 3 | randomchampgamer 17.6% of the fleet | 635.72B | 3,741 |
| 4 | RickEdinson 13.1% of the fleet | 474.34B | 2,727 |
| 5 | MoNiKaMaDnEsS 7.1% of the fleet | 256.66B | 1,608 |
| 6 | soothdest <0.1% of the fleet | 474.8M | 26 |
6 accounts · 3.61T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 32.9% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.3% of the fleet | 42.02T | 343,951 |
| 3 | BManBJ 14.4% of the fleet | 39.50T | 277,410 |
| 4 | auranvesdranor 11.4% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 5.4% of the fleet | 14.77T | 108,671 |
| 6 | JackIV 3.7% of the fleet | 10.06T | 67,859 |
| 7 | RickEdinson 3.6% of the fleet | 9.78T | 65,313 |
| 8 | gannet 2.6% of the fleet | 7.24T | 46,848 |
| 9 | MoNiKaMaDnEsS 2.1% of the fleet | 5.77T | 38,603 |
| 10 | NeoArcturus 1.5% of the fleet | 4.09T | 16,758 |
and 25 more.
35 accounts · 274.83T 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 21 proposals · see every proposal
Milestones
- Oct 06 16:53 Solved: BLACK_WIN via MINIMAXview
1. Nf3 f6 2. e4 c6 … 14. f3 Bxh3 15. Nf7 Nc2 16. Kg1
1. Nf3 f6 2. e4 c6 3. Nc3 g6 4. Nd5 cxd5 5. d4 Nc6 6. Bb5 Bg7 7. O-O a6 8. Kh1 d6 9. Bh6 Bxh6 10. h3 Kf8 11. c4 Bg4 12. Ng5 Nb4 13. Bc6 e6 14. f3 Bxh3 15. Nf7 Nc2 16. Kg1 - Oct 06 16:53 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … 15. Nf7 Nc2 16. Kg1 Ne3 17. Nxd8
1. Nf3 f6 2. e4 c6 3. Nc3 g6 4. Nd5 cxd5 5. d4 Nc6 6. Bb5 Bg7 7. O-O a6 8. Kh1 d6 9. Bh6 Bxh6 10. h3 Kf8 11. c4 Bg4 12. Ng5 Nb4 13. Bc6 e6 14. f3 Bxh3 15. Nf7 Nc2 16. Kg1 Ne3 17. Nxd8 - Oct 06 16:53 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … Bxh3 15. Nf7 Nc2 16. Kg1 Ne3
1. Nf3 f6 2. e4 c6 3. Nc3 g6 4. Nd5 cxd5 5. d4 Nc6 6. Bb5 Bg7 7. O-O a6 8. Kh1 d6 9. Bh6 Bxh6 10. h3 Kf8 11. c4 Bg4 12. Ng5 Nb4 13. Bc6 e6 14. f3 Bxh3 15. Nf7 Nc2 16. Kg1 Ne3 - Oct 06 16:52 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … Bb7 13. Qc2 Nd7 14. f3 Kg7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. Bb5 Qxb5 6. d4 g6 7. Nxh8 b6 8. Bg5 e5 9. b4 a5 10. a4 Kf7 11. O-O Kg8 12. c4 Bb7 13. Qc2 Nd7 14. f3 Kg7 - Oct 06 16:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Ne6 23. exf5 g5 24. Qg8 Kh6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. Bb5 Qxb5 6. d4 g6 7. Nxh8 b6 8. Bg5 e5 9. b4 a5 10. a4 Kf7 11. O-O Kg8 12. c4 Bb7 13. Qc2 Nd7 14. f3 Kg7 15. c5 Re8 16. Bh6 Kh8 17. Bg7 Kh7 18. Bxf8 Nf8 19. dxe5 d5 20. cxb6 c6 21. Qb2 d4 22. Qa2 Ne6 23. exf5 g5 24. Qg8 Kh6 - Oct 06 16:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 22. Qa2 Ne6 23. exf5 g5 24. Qg8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. Bb5 Qxb5 6. d4 g6 7. Nxh8 b6 8. Bg5 e5 9. b4 a5 10. a4 Kf7 11. O-O Kg8 12. c4 Bb7 13. Qc2 Nd7 14. f3 Kg7 15. c5 Re8 16. Bh6 Kh8 17. Bg7 Kh7 18. Bxf8 Nf8 19. dxe5 d5 20. cxb6 c6 21. Qb2 d4 22. Qa2 Ne6 23. exf5 g5 24. Qg8 - Oct 06 16:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … d4 22. Qa2 Ne6 23. exf5 g5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. Bb5 Qxb5 6. d4 g6 7. Nxh8 b6 8. Bg5 e5 9. b4 a5 10. a4 Kf7 11. O-O Kg8 12. c4 Bb7 13. Qc2 Nd7 14. f3 Kg7 15. c5 Re8 16. Bh6 Kh8 17. Bg7 Kh7 18. Bxf8 Nf8 19. dxe5 d5 20. cxb6 c6 21. Qb2 d4 22. Qa2 Ne6 23. exf5 g5 - Oct 06 16:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 21. Qb2 d4 22. Qa2 Ne6 23. exf5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. Bb5 Qxb5 6. d4 g6 7. Nxh8 b6 8. Bg5 e5 9. b4 a5 10. a4 Kf7 11. O-O Kg8 12. c4 Bb7 13. Qc2 Nd7 14. f3 Kg7 15. c5 Re8 16. Bh6 Kh8 17. Bg7 Kh7 18. Bxf8 Nf8 19. dxe5 d5 20. cxb6 c6 21. Qb2 d4 22. Qa2 Ne6 23. exf5 - Oct 06 16:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … c6 21. Qb2 d4 22. Qa2 Ne6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. Bb5 Qxb5 6. d4 g6 7. Nxh8 b6 8. Bg5 e5 9. b4 a5 10. a4 Kf7 11. O-O Kg8 12. c4 Bb7 13. Qc2 Nd7 14. f3 Kg7 15. c5 Re8 16. Bh6 Kh8 17. Bg7 Kh7 18. Bxf8 Nf8 19. dxe5 d5 20. cxb6 c6 21. Qb2 d4 22. Qa2 Ne6 - Oct 06 16:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 20. cxb6 c6 21. Qb2 d4 22. Qa2
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. Bb5 Qxb5 6. d4 g6 7. Nxh8 b6 8. Bg5 e5 9. b4 a5 10. a4 Kf7 11. O-O Kg8 12. c4 Bb7 13. Qc2 Nd7 14. f3 Kg7 15. c5 Re8 16. Bh6 Kh8 17. Bg7 Kh7 18. Bxf8 Nf8 19. dxe5 d5 20. cxb6 c6 21. Qb2 d4 22. Qa2 - Oct 06 16:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … d5 20. cxb6 c6 21. Qb2 d4
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. Bb5 Qxb5 6. d4 g6 7. Nxh8 b6 8. Bg5 e5 9. b4 a5 10. a4 Kf7 11. O-O Kg8 12. c4 Bb7 13. Qc2 Nd7 14. f3 Kg7 15. c5 Re8 16. Bh6 Kh8 17. Bg7 Kh7 18. Bxf8 Nf8 19. dxe5 d5 20. cxb6 c6 21. Qb2 d4 - Oct 06 16:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 19. dxe5 d5 20. cxb6 c6 21. Qb2
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. Bb5 Qxb5 6. d4 g6 7. Nxh8 b6 8. Bg5 e5 9. b4 a5 10. a4 Kf7 11. O-O Kg8 12. c4 Bb7 13. Qc2 Nd7 14. f3 Kg7 15. c5 Re8 16. Bh6 Kh8 17. Bg7 Kh7 18. Bxf8 Nf8 19. dxe5 d5 20. cxb6 c6 21. Qb2