76.0M
positions
14.3M
practically solved
273.50T
engine nodes
2.1M
analyses
705
in queue
10
active workers
56
active cores
15.0M
nodes / sec
12.9
positions / min
82
proof number
3,796
disproof number
Root conquest: 0/20 first moves solved · 18.8% of tree positions solved · last 24h: 230,345 closures, 3.73T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 69 over 218 open obligations, of which 42 (19.3%) 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 4.4h (median of 20) · measured at 2026-10-06 08:00 UTC
Closures by source, last 24h (230345 of 230345 labelled): USER 99.8% (229855) · FILL 0.1% (189) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.1% (301) · last 7d (2109671 of 2109671): USER 99.8% (2104731) · FILL 0.0% (189) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.2% (4751). 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 … O-O 16. Qxb5 f5 17. O-O g5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 c6 … e6 9. c4 axb5 10. a4 d5 (User) · 2.00B nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. Nc3 c6 … 21. c5 a4 22. c6 f5 23. g5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. Nc3 c6 … f5 17. O-O g5 18. g4 fxg4 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 c6 … axb5 10. a4 Bh6 11. Ng5 Bxg5 (User) · 2.00B 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 | 1079 | 2 | |
| g1h3 | unsolved | 820 | 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 43.8% of the fleet | 1.63T | 9,357 |
| 2 | tenzink 18.7% of the fleet | 699.09B | 3,815 |
| 3 | randomchampgamer 17.9% of the fleet | 670.23B | 3,778 |
| 4 | RickEdinson 13.1% of the fleet | 488.03B | 2,692 |
| 5 | MoNiKaMaDnEsS 6.4% of the fleet | 238.33B | 1,401 |
| 6 | quasa 0.1% of the fleet | 3.35B | 27 |
| 7 | soothdest <0.1% of the fleet | 474.8M | 26 |
7 accounts · 3.73T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 33.0% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.3% of the fleet | 41.78T | 342,386 |
| 3 | BManBJ 14.3% of the fleet | 38.99T | 273,973 |
| 4 | auranvesdranor 11.5% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 5.3% of the fleet | 14.56T | 107,312 |
| 6 | JackIV 3.7% of the fleet | 10.06T | 67,859 |
| 7 | RickEdinson 3.5% of the fleet | 9.61T | 64,287 |
| 8 | gannet 2.6% of the fleet | 7.24T | 46,848 |
| 9 | MoNiKaMaDnEsS 2.1% of the fleet | 5.66T | 37,905 |
| 10 | NeoArcturus 1.5% of the fleet | 4.09T | 16,758 |
and 25 more.
35 accounts · 273.60T 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 08:41 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … exd4 16. Qc4 Nc6 17. Qf7 Kd8
1. Nf3 f6 2. e4 c6 3. Nc3 g6 4. Nd5 cxd5 5. d4 Nc6 6. Bb5 Qa5 7. c3 Bh6 8. Ng5 Bxg5 9. h4 d6 10. h5 e5 11. Ba6 Be6 12. Bxb7 Qb5 13. Qa4 Bxa2 14. f4 Ne7 15. g4 exd4 16. Qc4 Nc6 17. Qf7 Kd8 - Oct 06 08:41 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … 15. g4 exd4 16. Qc4 Nc6 17. Qf7
1. Nf3 f6 2. e4 c6 3. Nc3 g6 4. Nd5 cxd5 5. d4 Nc6 6. Bb5 Qa5 7. c3 Bh6 8. Ng5 Bxg5 9. h4 d6 10. h5 e5 11. Ba6 Be6 12. Bxb7 Qb5 13. Qa4 Bxa2 14. f4 Ne7 15. g4 exd4 16. Qc4 Nc6 17. Qf7 - Oct 06 08:41 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … Ne7 15. g4 exd4 16. Qc4 Nc6
1. Nf3 f6 2. e4 c6 3. Nc3 g6 4. Nd5 cxd5 5. d4 Nc6 6. Bb5 Qa5 7. c3 Bh6 8. Ng5 Bxg5 9. h4 d6 10. h5 e5 11. Ba6 Be6 12. Bxb7 Qb5 13. Qa4 Bxa2 14. f4 Ne7 15. g4 exd4 16. Qc4 Nc6 - Oct 06 08:41 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … exd4 16. Qc4 Nd5 17. Qc8 Ke7
1. Nf3 f6 2. e4 c6 3. Nc3 g6 4. Nd5 cxd5 5. d4 Nc6 6. Bb5 Qa5 7. c3 Bh6 8. Ng5 Bxg5 9. h4 d6 10. h5 e5 11. Ba6 Be6 12. Bxb7 Qb5 13. Qa4 Bxa2 14. f4 Ne7 15. g4 exd4 16. Qc4 Nd5 17. Qc8 Ke7 - Oct 06 08:41 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … 15. g4 exd4 16. Qc4 Nd5 17. Qc8
1. Nf3 f6 2. e4 c6 3. Nc3 g6 4. Nd5 cxd5 5. d4 Nc6 6. Bb5 Qa5 7. c3 Bh6 8. Ng5 Bxg5 9. h4 d6 10. h5 e5 11. Ba6 Be6 12. Bxb7 Qb5 13. Qa4 Bxa2 14. f4 Ne7 15. g4 exd4 16. Qc4 Nd5 17. Qc8 - Oct 06 08:41 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … Ne7 15. g4 exd4 16. Qc4 Nd5
1. Nf3 f6 2. e4 c6 3. Nc3 g6 4. Nd5 cxd5 5. d4 Nc6 6. Bb5 Qa5 7. c3 Bh6 8. Ng5 Bxg5 9. h4 d6 10. h5 e5 11. Ba6 Be6 12. Bxb7 Qb5 13. Qa4 Bxa2 14. f4 Ne7 15. g4 exd4 16. Qc4 Nd5 - Oct 06 08:41 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … Kg7 23. Rg8 Kf7 24. Rf8 Ke7
1. Nf3 f6 2. e4 c6 3. Nc3 g6 4. Nd5 cxd5 5. d4 Nc6 6. Bb5 Qa5 7. c3 Bh6 8. Ng5 Bxg5 9. h4 d6 10. h5 e5 11. Ba6 Be6 12. Bxb7 Qb5 13. Qa4 Bxa2 14. f4 Ne7 15. g4 exd4 16. Qc4 Qd5 17. Qc7 O-O 18. exd5 Kh8 19. O-O gxh5 20. Re1 Rc8 21. Qd8 Rxd8 22. Re8 Kg7 23. Rg8 Kf7 24. Rf8 Ke7 - Oct 06 08:41 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … 22. Re8 Kg7 23. Rg8 Kf7 24. Rf8
1. Nf3 f6 2. e4 c6 3. Nc3 g6 4. Nd5 cxd5 5. d4 Nc6 6. Bb5 Qa5 7. c3 Bh6 8. Ng5 Bxg5 9. h4 d6 10. h5 e5 11. Ba6 Be6 12. Bxb7 Qb5 13. Qa4 Bxa2 14. f4 Ne7 15. g4 exd4 16. Qc4 Qd5 17. Qc7 O-O 18. exd5 Kh8 19. O-O gxh5 20. Re1 Rc8 21. Qd8 Rxd8 22. Re8 Kg7 23. Rg8 Kf7 24. Rf8 - Oct 06 08:41 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … Rxd8 22. Re8 Kg7 23. Rg8 Kf7
1. Nf3 f6 2. e4 c6 3. Nc3 g6 4. Nd5 cxd5 5. d4 Nc6 6. Bb5 Qa5 7. c3 Bh6 8. Ng5 Bxg5 9. h4 d6 10. h5 e5 11. Ba6 Be6 12. Bxb7 Qb5 13. Qa4 Bxa2 14. f4 Ne7 15. g4 exd4 16. Qc4 Qd5 17. Qc7 O-O 18. exd5 Kh8 19. O-O gxh5 20. Re1 Rc8 21. Qd8 Rxd8 22. Re8 Kg7 23. Rg8 Kf7 - Oct 06 08:41 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … 21. Qd8 Rxd8 22. Re8 Kg7 23. Rg8
1. Nf3 f6 2. e4 c6 3. Nc3 g6 4. Nd5 cxd5 5. d4 Nc6 6. Bb5 Qa5 7. c3 Bh6 8. Ng5 Bxg5 9. h4 d6 10. h5 e5 11. Ba6 Be6 12. Bxb7 Qb5 13. Qa4 Bxa2 14. f4 Ne7 15. g4 exd4 16. Qc4 Qd5 17. Qc7 O-O 18. exd5 Kh8 19. O-O gxh5 20. Re1 Rc8 21. Qd8 Rxd8 22. Re8 Kg7 23. Rg8 - Oct 06 08:41 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … Rc8 21. Qd8 Rxd8 22. Re8 Kg7
1. Nf3 f6 2. e4 c6 3. Nc3 g6 4. Nd5 cxd5 5. d4 Nc6 6. Bb5 Qa5 7. c3 Bh6 8. Ng5 Bxg5 9. h4 d6 10. h5 e5 11. Ba6 Be6 12. Bxb7 Qb5 13. Qa4 Bxa2 14. f4 Ne7 15. g4 exd4 16. Qc4 Qd5 17. Qc7 O-O 18. exd5 Kh8 19. O-O gxh5 20. Re1 Rc8 21. Qd8 Rxd8 22. Re8 Kg7 - Oct 06 08:41 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … 20. Re1 Rc8 21. Qd8 Rxd8 22. Re8
1. Nf3 f6 2. e4 c6 3. Nc3 g6 4. Nd5 cxd5 5. d4 Nc6 6. Bb5 Qa5 7. c3 Bh6 8. Ng5 Bxg5 9. h4 d6 10. h5 e5 11. Ba6 Be6 12. Bxb7 Qb5 13. Qa4 Bxa2 14. f4 Ne7 15. g4 exd4 16. Qc4 Qd5 17. Qc7 O-O 18. exd5 Kh8 19. O-O gxh5 20. Re1 Rc8 21. Qd8 Rxd8 22. Re8