103.3M
positions
21.8M
practically solved
380.30T
engine nodes
2.8M
analyses
232
in queue
active workers
28
active cores
25.3M
nodes / sec
9.3
positions / min
107
proof number
4,824
disproof number
Root conquest: 0/20 first moves solved · 21.1% of tree positions solved · last 24h: 196,454 closures, 4.49T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 over 200 open obligations, of which 36 (18.0%) 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 30.3d (median of 79) · measured at 2026-10-29 23:00 UTC
Closures by source, last 24h (196454 of 196454 labelled): USER 96.9% (190378) · FILL 2.1% (4167) · AUTO 0.9% (1824) · SOLVE 0.0% (0) · NONE 0.0% (85) · last 7d (1760925 of 1760925): USER 98.5% (1734487) · FILL 0.5% (9638) · AUTO 0.9% (16257) · SOLVE 0.0% (0) · NONE 0.0% (543). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing all workers
- 1. e4 d6 2. Nh3 f5 … O-O 13. dxc6 Rfc8 14. f4 Rcb8 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#0
- 1. e4 d6 2. Nh3 f5 … O-O 13. dxc6 Rfb8 14. f4 Rd8 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#1
- 1. e4 d6 2. Nh3 f5 … O-O 13. dxc6 Rfb8 14. f4 Rc8 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#2
- 1. e4 d6 2. Nh3 f5 … O-O 13. dxc6 Rfe8 14. f4 Rad8 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 c6 … 26. f7 Rf8 27. Bd7 Kh8 28. b3 (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 | 1165 | 2 | |
| g1h3 | unsolved | 820 | 2 | |
| e2e3 | unsolved | 469 | 3 | |
| d2d4 | unsolved | 405 | 2 | |
| e2e4 | unsolved | 401 | 2 | |
| b1c3 | unsolved | 141 | 2 | |
| b1a3 | unsolved | 0 | 3 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b2b4 | unsolved | -59 | 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 49.2% of the fleet | 2.21T | 13,525 |
| 2 | BManBJ 37.3% of the fleet | 1.67T | 5,711 |
| 3 | RickEdinson 10.5% of the fleet | 473.75B | 3,127 |
| 4 | MoNiKaMaDnEsS 3.0% of the fleet | 136.53B | 921 |
4 accounts · 4.49T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 23.7% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 19.8% of the fleet | 75.26T | 517,728 |
| 3 | Torom 13.3% of the fleet | 50.55T | 363,522 |
| 4 | tenzink 11.3% of the fleet | 42.83T | 349,427 |
| 5 | auranvesdranor 8.3% of the fleet | 31.40T | 228,002 |
| 6 | RickEdinson 5.4% of the fleet | 20.36T | 133,499 |
| 7 | randomchampgamer 5.2% of the fleet | 19.85T | 140,897 |
| 8 | MoNiKaMaDnEsS 3.1% of the fleet | 11.85T | 81,529 |
| 9 | JackIV 2.6% of the fleet | 10.06T | 67,859 |
| 10 | gannet 1.9% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 380.38T 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 29 23:57 Solved: WHITE_WIN via MINIMAXview
1. e4 d6 2. Nh3 f5 … O-O 13. dxc6 Kh8 14. f4 Rfe8
1. e4 d6 2. Nh3 f5 3. Bb5 c6 4. Ng5 g6 5. Nf7 Qd7 6. d4 h5 7. Bxc6 Bh6 8. Bg5 Nf6 9. Nd8 Be6 10. c4 b6 11. d5 Nc6 12. Nxe6 O-O 13. dxc6 Kh8 14. f4 Rfe8 - Oct 29 23:57 Solved: WHITE_WIN via MATE_PVview
1. e4 d6 2. Nh3 f5 … h3 26. g3 e5 27. Qf8 Kh7
1. e4 d6 2. Nh3 f5 3. Bb5 c6 4. Ng5 g6 5. Nf7 Qd7 6. d4 h5 7. Bxc6 Bh6 8. Bg5 Nf6 9. Nd8 Be6 10. c4 b6 11. d5 Nc6 12. Nxe6 O-O 13. dxc6 Kh8 14. f4 Rfe8 15. Qb3 Rac8 16. c5 d5 17. exd5 e6 18. c6 Bg7 19. Bf6 Bxf6 20. O-O Red8 21. Rd1 Rd6 22. Rxd6 Rd8 23. c7 Kg8 24. cxd8=R h4 25. Qb4 h3 26. g3 e5 27. Qf8 Kh7 - Oct 29 23:57 Solved: WHITE_WIN via MATE_PVview
1. e4 d6 2. Nh3 f5 … 25. Qb4 h3 26. g3 e5 27. Qf8
1. e4 d6 2. Nh3 f5 3. Bb5 c6 4. Ng5 g6 5. Nf7 Qd7 6. d4 h5 7. Bxc6 Bh6 8. Bg5 Nf6 9. Nd8 Be6 10. c4 b6 11. d5 Nc6 12. Nxe6 O-O 13. dxc6 Kh8 14. f4 Rfe8 15. Qb3 Rac8 16. c5 d5 17. exd5 e6 18. c6 Bg7 19. Bf6 Bxf6 20. O-O Red8 21. Rd1 Rd6 22. Rxd6 Rd8 23. c7 Kg8 24. cxd8=R h4 25. Qb4 h3 26. g3 e5 27. Qf8 - Oct 29 23:57 Solved: WHITE_WIN via MATE_PVview
1. e4 d6 2. Nh3 f5 … h4 25. Qb4 h3 26. g3 e5
1. e4 d6 2. Nh3 f5 3. Bb5 c6 4. Ng5 g6 5. Nf7 Qd7 6. d4 h5 7. Bxc6 Bh6 8. Bg5 Nf6 9. Nd8 Be6 10. c4 b6 11. d5 Nc6 12. Nxe6 O-O 13. dxc6 Kh8 14. f4 Rfe8 15. Qb3 Rac8 16. c5 d5 17. exd5 e6 18. c6 Bg7 19. Bf6 Bxf6 20. O-O Red8 21. Rd1 Rd6 22. Rxd6 Rd8 23. c7 Kg8 24. cxd8=R h4 25. Qb4 h3 26. g3 e5 - Oct 29 23:57 Solved: WHITE_WIN via MATE_PVview
1. e4 d6 2. Nh3 f5 … 24. cxd8=R h4 25. Qb4 h3 26. g3
1. e4 d6 2. Nh3 f5 3. Bb5 c6 4. Ng5 g6 5. Nf7 Qd7 6. d4 h5 7. Bxc6 Bh6 8. Bg5 Nf6 9. Nd8 Be6 10. c4 b6 11. d5 Nc6 12. Nxe6 O-O 13. dxc6 Kh8 14. f4 Rfe8 15. Qb3 Rac8 16. c5 d5 17. exd5 e6 18. c6 Bg7 19. Bf6 Bxf6 20. O-O Red8 21. Rd1 Rd6 22. Rxd6 Rd8 23. c7 Kg8 24. cxd8=R h4 25. Qb4 h3 26. g3 - Oct 29 23:57 Solved: WHITE_WIN via MATE_PVview
1. e4 d6 2. Nh3 f5 … Kg8 24. cxd8=R h4 25. Qb4 h3
1. e4 d6 2. Nh3 f5 3. Bb5 c6 4. Ng5 g6 5. Nf7 Qd7 6. d4 h5 7. Bxc6 Bh6 8. Bg5 Nf6 9. Nd8 Be6 10. c4 b6 11. d5 Nc6 12. Nxe6 O-O 13. dxc6 Kh8 14. f4 Rfe8 15. Qb3 Rac8 16. c5 d5 17. exd5 e6 18. c6 Bg7 19. Bf6 Bxf6 20. O-O Red8 21. Rd1 Rd6 22. Rxd6 Rd8 23. c7 Kg8 24. cxd8=R h4 25. Qb4 h3 - Oct 29 23:57 Solved: WHITE_WIN via MATE_PVview
1. e4 d6 2. Nh3 f5 … 23. c7 Kg8 24. cxd8=R h4 25. Qb4
1. e4 d6 2. Nh3 f5 3. Bb5 c6 4. Ng5 g6 5. Nf7 Qd7 6. d4 h5 7. Bxc6 Bh6 8. Bg5 Nf6 9. Nd8 Be6 10. c4 b6 11. d5 Nc6 12. Nxe6 O-O 13. dxc6 Kh8 14. f4 Rfe8 15. Qb3 Rac8 16. c5 d5 17. exd5 e6 18. c6 Bg7 19. Bf6 Bxf6 20. O-O Red8 21. Rd1 Rd6 22. Rxd6 Rd8 23. c7 Kg8 24. cxd8=R h4 25. Qb4 - Oct 29 23:57 Solved: WHITE_WIN via MATE_PVview
1. e4 d6 2. Nh3 f5 … Rd8 23. c7 Kg8 24. cxd8=R h4
1. e4 d6 2. Nh3 f5 3. Bb5 c6 4. Ng5 g6 5. Nf7 Qd7 6. d4 h5 7. Bxc6 Bh6 8. Bg5 Nf6 9. Nd8 Be6 10. c4 b6 11. d5 Nc6 12. Nxe6 O-O 13. dxc6 Kh8 14. f4 Rfe8 15. Qb3 Rac8 16. c5 d5 17. exd5 e6 18. c6 Bg7 19. Bf6 Bxf6 20. O-O Red8 21. Rd1 Rd6 22. Rxd6 Rd8 23. c7 Kg8 24. cxd8=R h4 - Oct 29 23:57 Solved: WHITE_WIN via MATE_PVview
1. e4 d6 2. Nh3 f5 … 22. Rxd6 Rd8 23. c7 Kg8 24. cxd8=R
1. e4 d6 2. Nh3 f5 3. Bb5 c6 4. Ng5 g6 5. Nf7 Qd7 6. d4 h5 7. Bxc6 Bh6 8. Bg5 Nf6 9. Nd8 Be6 10. c4 b6 11. d5 Nc6 12. Nxe6 O-O 13. dxc6 Kh8 14. f4 Rfe8 15. Qb3 Rac8 16. c5 d5 17. exd5 e6 18. c6 Bg7 19. Bf6 Bxf6 20. O-O Red8 21. Rd1 Rd6 22. Rxd6 Rd8 23. c7 Kg8 24. cxd8=R - Oct 29 23:57 Solved: WHITE_WIN via MATE_PVview
1. e4 d6 2. Nh3 f5 … Rd6 22. Rxd6 Rd8 23. c7 Kg8
1. e4 d6 2. Nh3 f5 3. Bb5 c6 4. Ng5 g6 5. Nf7 Qd7 6. d4 h5 7. Bxc6 Bh6 8. Bg5 Nf6 9. Nd8 Be6 10. c4 b6 11. d5 Nc6 12. Nxe6 O-O 13. dxc6 Kh8 14. f4 Rfe8 15. Qb3 Rac8 16. c5 d5 17. exd5 e6 18. c6 Bg7 19. Bf6 Bxf6 20. O-O Red8 21. Rd1 Rd6 22. Rxd6 Rd8 23. c7 Kg8 - Oct 29 23:57 Solved: WHITE_WIN via MATE_PVview
1. e4 d6 2. Nh3 f5 … 21. Rd1 Rd6 22. Rxd6 Rd8 23. c7
1. e4 d6 2. Nh3 f5 3. Bb5 c6 4. Ng5 g6 5. Nf7 Qd7 6. d4 h5 7. Bxc6 Bh6 8. Bg5 Nf6 9. Nd8 Be6 10. c4 b6 11. d5 Nc6 12. Nxe6 O-O 13. dxc6 Kh8 14. f4 Rfe8 15. Qb3 Rac8 16. c5 d5 17. exd5 e6 18. c6 Bg7 19. Bf6 Bxf6 20. O-O Red8 21. Rd1 Rd6 22. Rxd6 Rd8 23. c7 - Oct 29 23:57 Solved: WHITE_WIN via MATE_PVview
1. e4 d6 2. Nh3 f5 … Red8 21. Rd1 Rd6 22. Rxd6 Rd8
1. e4 d6 2. Nh3 f5 3. Bb5 c6 4. Ng5 g6 5. Nf7 Qd7 6. d4 h5 7. Bxc6 Bh6 8. Bg5 Nf6 9. Nd8 Be6 10. c4 b6 11. d5 Nc6 12. Nxe6 O-O 13. dxc6 Kh8 14. f4 Rfe8 15. Qb3 Rac8 16. c5 d5 17. exd5 e6 18. c6 Bg7 19. Bf6 Bxf6 20. O-O Red8 21. Rd1 Rd6 22. Rxd6 Rd8