76.4M
positions
14.4M
practically solved
274.87T
engine nodes
2.1M
analyses
1,863
in queue
17
active workers
80
active cores
12.0M
nodes / sec
34.3
positions / min
82
proof number
3,796
disproof number
Root conquest: 0/20 first moves solved · 18.9% of tree positions solved · last 24h: 242,162 closures, 3.67T 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 53s (median of 108) · measured at 2026-10-06 17:00 UTC
Closures by source, last 24h (242162 of 242162 labelled): USER 99.8% (241781) · FILL 0.1% (294) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.0% (87) · last 7d (2080947 of 2080947): USER 99.8% (2075891) · 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 … Ng4 13. Nf7 Qe8 14. Qb3 Bf5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … 35. Rf6 Rb4 36. Bd3 Kb2 37. g4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. Nc3 c6 … Ng4 13. Nf7 Qe8 14. Qb3 Nce5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. Nc3 c6 … Ng4 13. Nf7 Qe8 14. Qb3 Nb8 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nh3 d5 2. Nc3 h6 … Nc6 12. Qh5 Rxh5 13. O-O-O g5 (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 | 1102 | 2 | |
| g1h3 | unsolved | 798 | 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 42.4% of the fleet | 1.56T | 9,544 |
| 2 | tenzink 18.3% of the fleet | 670.44B | 4,021 |
| 3 | randomchampgamer 17.2% of the fleet | 633.30B | 3,770 |
| 4 | RickEdinson 12.9% of the fleet | 473.01B | 2,742 |
| 5 | MoNiKaMaDnEsS 6.3% of the fleet | 232.78B | 1,485 |
| 6 | Torom 2.9% of the fleet | 106.50B | 737 |
| 7 | soothdest <0.1% of the fleet | 474.8M | 26 |
7 accounts · 3.67T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 32.8% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.3% of the fleet | 42.03T | 344,047 |
| 3 | BManBJ 14.4% of the fleet | 39.55T | 277,726 |
| 4 | auranvesdranor 11.4% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 5.4% of the fleet | 14.79T | 108,811 |
| 6 | JackIV 3.7% of the fleet | 10.06T | 67,859 |
| 7 | RickEdinson 3.6% of the fleet | 9.79T | 65,412 |
| 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 · 275.03T 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 17:40 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. e4 c6 … Ng4 13. Nf7 Qe8 14. Qb3 Nb4
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 Nh6 12. Ng5 Ng4 13. Nf7 Qe8 14. Qb3 Nb4 - Oct 06 17:40 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … 13. Nf7 Qe8 14. Qb3 Ne3 15. a3
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 Nh6 12. Ng5 Ng4 13. Nf7 Qe8 14. Qb3 Ne3 15. a3 - Oct 06 17:40 Solved: BLACK_WIN via MINIMAXview
1. Nf3 f6 2. e4 c6 … 12. Ng5 Ng4 13. Nf7 Qe8 14. 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 Nh6 12. Ng5 Ng4 13. Nf7 Qe8 14. Kg1 - Oct 06 17:39 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. e4 c6 … Ng4 13. Nf7 Qe8 14. Qb3 f5
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 Nh6 12. Ng5 Ng4 13. Nf7 Qe8 14. Qb3 f5 - Oct 06 17:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … Kh8 22. Rh7 Kg8 23. Rh8 Kf7
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 Nh6 12. Ng5 Ng4 13. Nf7 Qe8 14. Qb3 f5 15. exf5 Bf5 16. Qe3 Be4 17. f3 h6 18. Qe2 e5 19. fxe4 Ra7 20. Nxh8 Kg7 21. Rf7 Kh8 22. Rh7 Kg8 23. Rh8 Kf7 - Oct 06 17:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … 21. Rf7 Kh8 22. Rh7 Kg8 23. Rh8
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 Nh6 12. Ng5 Ng4 13. Nf7 Qe8 14. Qb3 f5 15. exf5 Bf5 16. Qe3 Be4 17. f3 h6 18. Qe2 e5 19. fxe4 Ra7 20. Nxh8 Kg7 21. Rf7 Kh8 22. Rh7 Kg8 23. Rh8 - Oct 06 17:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … Kg7 21. Rf7 Kh8 22. Rh7 Kg8
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 Nh6 12. Ng5 Ng4 13. Nf7 Qe8 14. Qb3 f5 15. exf5 Bf5 16. Qe3 Be4 17. f3 h6 18. Qe2 e5 19. fxe4 Ra7 20. Nxh8 Kg7 21. Rf7 Kh8 22. Rh7 Kg8 - Oct 06 17:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … 20. Nxh8 Kg7 21. Rf7 Kh8 22. Rh7
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 Nh6 12. Ng5 Ng4 13. Nf7 Qe8 14. Qb3 f5 15. exf5 Bf5 16. Qe3 Be4 17. f3 h6 18. Qe2 e5 19. fxe4 Ra7 20. Nxh8 Kg7 21. Rf7 Kh8 22. Rh7 - Oct 06 17:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … Ra7 20. Nxh8 Kg7 21. Rf7 Kh8
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 Nh6 12. Ng5 Ng4 13. Nf7 Qe8 14. Qb3 f5 15. exf5 Bf5 16. Qe3 Be4 17. f3 h6 18. Qe2 e5 19. fxe4 Ra7 20. Nxh8 Kg7 21. Rf7 Kh8 - Oct 06 17:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … 19. fxe4 Ra7 20. Nxh8 Kg7 21. Rf7
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 Nh6 12. Ng5 Ng4 13. Nf7 Qe8 14. Qb3 f5 15. exf5 Bf5 16. Qe3 Be4 17. f3 h6 18. Qe2 e5 19. fxe4 Ra7 20. Nxh8 Kg7 21. Rf7 - Oct 06 17:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … e5 19. fxe4 Ra7 20. Nxh8 Kg7
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 Nh6 12. Ng5 Ng4 13. Nf7 Qe8 14. Qb3 f5 15. exf5 Bf5 16. Qe3 Be4 17. f3 h6 18. Qe2 e5 19. fxe4 Ra7 20. Nxh8 Kg7 - Oct 06 17:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … 18. Qe2 e5 19. fxe4 Ra7 20. Nxh8
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 Nh6 12. Ng5 Ng4 13. Nf7 Qe8 14. Qb3 f5 15. exf5 Bf5 16. Qe3 Be4 17. f3 h6 18. Qe2 e5 19. fxe4 Ra7 20. Nxh8