88.6M
positions
16.9M
practically solved
326.81T
engine nodes
2.5M
analyses
50
in queue
14
active workers
64
active cores
33.0M
nodes / sec
33.1
positions / min
143
proof number
4,659
disproof number
Root conquest: 0/20 first moves solved · 19.1% of tree positions solved · last 24h: 367,290 closures, 6.57T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 70 over 204 open obligations, of which 37 (18.1%) 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 2.2m (median of 124) · measured at 2026-10-19 17:00 UTC
Closures by source, last 24h (367290 of 367290 labelled): USER 98.8% (362787) · FILL 0.3% (1038) · AUTO 0.3% (1002) · SOLVE 0.0% (0) · NONE 0.7% (2463) · last 7d (1028529 of 1028529): USER 92.4% (950776) · FILL 0.7% (7648) · AUTO 6.5% (67149) · SOLVE 0.0% (0) · NONE 0.3% (2956). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- deep line, ply ≥22 · … Nb1 b6 Qe2 Ra8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. Na3 Nc6 (User) · 10.00B nodes · BManBJ-Blake-atomicdb#1
- deep line, ply ≥18 · … Nb1 Kf7 Qe2 Rf8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- deep line, ply ≥22 · … Nb1 b6 Qe2 Ke6 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … 14. g4 b6 15. c4 a6 16. fxe6 (User) · 128.0M 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 | 1191 | 2 | |
| g1h3 | unsolved | 821 | 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 | Torom 65.1% of the fleet | 4.28T | 30,562 |
| 2 | BManBJ 24.8% of the fleet | 1.63T | 12,071 |
| 3 | RickEdinson 6.6% of the fleet | 432.64B | 2,741 |
| 4 | MoNiKaMaDnEsS 3.4% of the fleet | 223.38B | 1,699 |
| 5 | soothdest 0.1% of the fleet | 8.13B | 52 |
5 accounts · 6.57T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 27.6% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 17.5% of the fleet | 57.11T | 402,433 |
| 3 | tenzink 13.1% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 9.6% of the fleet | 31.40T | 228,002 |
| 5 | Torom 7.1% of the fleet | 23.36T | 166,432 |
| 6 | randomchampgamer 6.1% of the fleet | 19.85T | 140,897 |
| 7 | RickEdinson 4.7% of the fleet | 15.43T | 102,904 |
| 8 | JackIV 3.1% of the fleet | 10.06T | 67,859 |
| 9 | MoNiKaMaDnEsS 2.7% of the fleet | 8.76T | 60,358 |
| 10 | gannet 2.2% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 326.97T 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 19 17:42 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … g5 14. Nd5 Rc8 15. Qe2 e6
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 Ne8 11. Nc3 Kg8 12. Bb5 h4 13. Qd2 g5 14. Nd5 Rc8 15. Qe2 e6 - Oct 19 17:42 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … g5 14. Nd5 Rc8 15. Qe2 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 Ne8 11. Nc3 Kg8 12. Bb5 h4 13. Qd2 g5 14. Nd5 Rc8 15. Qe2 a5 - Oct 19 17:42 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Kf7 21. Qh6 e5 22. Qg6 Ke7
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 Ne8 11. Nc3 Kg8 12. Bb5 h4 13. Qd2 g5 14. Nd5 Rc8 15. Qe2 e6 16. Ba6 g4 17. Bxb7 a6 18. Qd2 g3 19. f3 f4 20. Nxf4 Kf7 21. Qh6 e5 22. Qg6 Ke7 - Oct 19 17:42 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 20. Nxf4 Kf7 21. Qh6 e5 22. Qg6
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 Ne8 11. Nc3 Kg8 12. Bb5 h4 13. Qd2 g5 14. Nd5 Rc8 15. Qe2 e6 16. Ba6 g4 17. Bxb7 a6 18. Qd2 g3 19. f3 f4 20. Nxf4 Kf7 21. Qh6 e5 22. Qg6 - Oct 19 17:42 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … f4 20. Nxf4 Kf7 21. Qh6 e5
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 Ne8 11. Nc3 Kg8 12. Bb5 h4 13. Qd2 g5 14. Nd5 Rc8 15. Qe2 e6 16. Ba6 g4 17. Bxb7 a6 18. Qd2 g3 19. f3 f4 20. Nxf4 Kf7 21. Qh6 e5 - Oct 19 17:42 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 19. f3 f4 20. Nxf4 Kf7 21. Qh6
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 Ne8 11. Nc3 Kg8 12. Bb5 h4 13. Qd2 g5 14. Nd5 Rc8 15. Qe2 e6 16. Ba6 g4 17. Bxb7 a6 18. Qd2 g3 19. f3 f4 20. Nxf4 Kf7 21. Qh6 - Oct 19 17:42 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … g3 19. f3 f4 20. Nxf4 Kf7
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 Ne8 11. Nc3 Kg8 12. Bb5 h4 13. Qd2 g5 14. Nd5 Rc8 15. Qe2 e6 16. Ba6 g4 17. Bxb7 a6 18. Qd2 g3 19. f3 f4 20. Nxf4 Kf7 - Oct 19 17:42 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 18. Qd2 g3 19. f3 f4 20. Nxf4
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 Ne8 11. Nc3 Kg8 12. Bb5 h4 13. Qd2 g5 14. Nd5 Rc8 15. Qe2 e6 16. Ba6 g4 17. Bxb7 a6 18. Qd2 g3 19. f3 f4 20. Nxf4 - Oct 19 17:42 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … a6 18. Qd2 g3 19. f3 f4
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 Ne8 11. Nc3 Kg8 12. Bb5 h4 13. Qd2 g5 14. Nd5 Rc8 15. Qe2 e6 16. Ba6 g4 17. Bxb7 a6 18. Qd2 g3 19. f3 f4 - Oct 19 17:42 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 17. Bxb7 a6 18. Qd2 g3 19. f3
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 Ne8 11. Nc3 Kg8 12. Bb5 h4 13. Qd2 g5 14. Nd5 Rc8 15. Qe2 e6 16. Ba6 g4 17. Bxb7 a6 18. Qd2 g3 19. f3 - Oct 19 17:42 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Kg7 20. Qe7 Kg6 21. Qf7 Kh6
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 Ne8 11. Nc3 Kg8 12. Bb5 h4 13. Qd2 g5 14. Nd5 Rc8 15. Qe2 a5 16. h3 g4 17. hxg4 Nf6 18. exf5 Rf8 19. Nxe7 Kg7 20. Qe7 Kg6 21. Qf7 Kh6 - Oct 19 17:42 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … g4 17. Bxb7 a6 18. Qd2 g3
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 Ne8 11. Nc3 Kg8 12. Bb5 h4 13. Qd2 g5 14. Nd5 Rc8 15. Qe2 e6 16. Ba6 g4 17. Bxb7 a6 18. Qd2 g3