104.4M
positions
22.2M
practically solved
385.81T
engine nodes
2.9M
analyses
126
in queue
active workers
92
active cores
64.3M
nodes / sec
26.0
positions / min
107
proof number
4,824
disproof number
Root conquest: 0/20 first moves solved · 21.3% of tree positions solved · last 24h: 126,727 closures, 2.47T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 over 201 open obligations, of which 37 (18.4%) 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 6.3m (median of 43) · measured at 2026-11-01 05:00 UTC
Closures by source, last 24h (126727 of 126727 labelled): USER 99.8% (126462) · FILL 0.2% (231) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.0% (34) · last 7d (1250363 of 1250363): USER 97.9% (1224108) · FILL 0.8% (9572) · AUTO 1.3% (16193) · SOLVE 0.0% (0) · NONE 0.0% (490). 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. Nf3 f6 2. e4 e6 … Bxe5 9. g4 h5 10. g5 d6 (User) · 128.0M nodes · acornwood
- 1. Nf3 f6 2. e4 e6 … Bxe5 11. Bf4 Qa5 12. c3 e5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#0
- 1. Nf3 f6 2. e4 e6 … 10. h4 a6 11. g4 hxg4 12. Qd3 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. e4 e6 … Bxe5 11. e5 Ng4 12. Bh6 Rxh6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. e4 e6 … Bxe5 11. g4 hxg4 12. d5 d6 (User) · 128.0M nodes · BManBJ-Laptop-Blake-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 | 1107 | 2 | |
| g1h3 | unsolved | 820 | 2 | |
| e2e3 | unsolved | 437 | 3 | |
| e2e4 | unsolved | 410 | 2 | |
| d2d4 | unsolved | 405 | 2 | |
| b1c3 | unsolved | 142 | 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 | BManBJ 66.5% of the fleet | 1.64T | 6,504 |
| 2 | RickEdinson 18.1% of the fleet | 445.49B | 3,001 |
| 3 | MoNiKaMaDnEsS 8.1% of the fleet | 200.23B | 1,315 |
| 4 | gannet 6.9% of the fleet | 169.81B | 1,327 |
| 5 | soothdest 0.4% of the fleet | 10.22B | 64 |
5 accounts · 2.47T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 23.4% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 20.4% of the fleet | 78.88T | 531,863 |
| 3 | Torom 13.1% of the fleet | 50.55T | 363,522 |
| 4 | tenzink 11.1% of the fleet | 42.83T | 349,427 |
| 5 | auranvesdranor 8.1% of the fleet | 31.40T | 228,002 |
| 6 | RickEdinson 5.5% of the fleet | 21.31T | 139,690 |
| 7 | randomchampgamer 5.1% of the fleet | 19.85T | 140,897 |
| 8 | MoNiKaMaDnEsS 3.3% of the fleet | 12.54T | 86,740 |
| 9 | JackIV 2.6% of the fleet | 10.06T | 67,859 |
| 10 | gannet 1.9% of the fleet | 7.41T | 48,175 |
and 25 more.
35 accounts · 385.83T 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 · 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
- Nov 01 05:10 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. e4 e6 … b6 13. c4 f5 14. f4 fxe4
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. O-O Bd6 8. Ne5 Bxe5 9. Kh1 d6 10. h4 Nh6 11. Bd2 O-O 12. g4 b6 13. c4 f5 14. f4 fxe4 - Nov 01 05:10 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … h5 28. Rf8 Kh7 29. Rh8 Kg6
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. O-O Bd6 8. Ne5 Bxe5 9. Kh1 d6 10. h4 Nh6 11. Bd2 O-O 12. g4 b6 13. c4 f5 14. f4 fxe4 15. f5 Nb4 16. Be8 Kh8 17. Bf7 Nxf7 18. d5 Nd3 19. fxg6 Qe8 20. Rf7 Qxf7 21. Bh6 exd5 22. Qe2 Nf2 23. Kh2 Be6 24. Qc2 Nd3 25. Bg7 Kg8 26. Rf1 Bf5 27. gxf5 h5 28. Rf8 Kh7 29. Rh8 Kg6 - Nov 01 05:10 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 27. gxf5 h5 28. Rf8 Kh7 29. Rh8
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. O-O Bd6 8. Ne5 Bxe5 9. Kh1 d6 10. h4 Nh6 11. Bd2 O-O 12. g4 b6 13. c4 f5 14. f4 fxe4 15. f5 Nb4 16. Be8 Kh8 17. Bf7 Nxf7 18. d5 Nd3 19. fxg6 Qe8 20. Rf7 Qxf7 21. Bh6 exd5 22. Qe2 Nf2 23. Kh2 Be6 24. Qc2 Nd3 25. Bg7 Kg8 26. Rf1 Bf5 27. gxf5 h5 28. Rf8 Kh7 29. Rh8 - Nov 01 05:10 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Bf5 27. gxf5 h5 28. Rf8 Kh7
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. O-O Bd6 8. Ne5 Bxe5 9. Kh1 d6 10. h4 Nh6 11. Bd2 O-O 12. g4 b6 13. c4 f5 14. f4 fxe4 15. f5 Nb4 16. Be8 Kh8 17. Bf7 Nxf7 18. d5 Nd3 19. fxg6 Qe8 20. Rf7 Qxf7 21. Bh6 exd5 22. Qe2 Nf2 23. Kh2 Be6 24. Qc2 Nd3 25. Bg7 Kg8 26. Rf1 Bf5 27. gxf5 h5 28. Rf8 Kh7 - Nov 01 05:10 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 26. Rf1 Bf5 27. gxf5 h5 28. Rf8
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. O-O Bd6 8. Ne5 Bxe5 9. Kh1 d6 10. h4 Nh6 11. Bd2 O-O 12. g4 b6 13. c4 f5 14. f4 fxe4 15. f5 Nb4 16. Be8 Kh8 17. Bf7 Nxf7 18. d5 Nd3 19. fxg6 Qe8 20. Rf7 Qxf7 21. Bh6 exd5 22. Qe2 Nf2 23. Kh2 Be6 24. Qc2 Nd3 25. Bg7 Kg8 26. Rf1 Bf5 27. gxf5 h5 28. Rf8 - Nov 01 05:10 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Kg8 26. Rf1 Bf5 27. gxf5 h5
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. O-O Bd6 8. Ne5 Bxe5 9. Kh1 d6 10. h4 Nh6 11. Bd2 O-O 12. g4 b6 13. c4 f5 14. f4 fxe4 15. f5 Nb4 16. Be8 Kh8 17. Bf7 Nxf7 18. d5 Nd3 19. fxg6 Qe8 20. Rf7 Qxf7 21. Bh6 exd5 22. Qe2 Nf2 23. Kh2 Be6 24. Qc2 Nd3 25. Bg7 Kg8 26. Rf1 Bf5 27. gxf5 h5 - Nov 01 05:10 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 25. Bg7 Kg8 26. Rf1 Bf5 27. gxf5
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. O-O Bd6 8. Ne5 Bxe5 9. Kh1 d6 10. h4 Nh6 11. Bd2 O-O 12. g4 b6 13. c4 f5 14. f4 fxe4 15. f5 Nb4 16. Be8 Kh8 17. Bf7 Nxf7 18. d5 Nd3 19. fxg6 Qe8 20. Rf7 Qxf7 21. Bh6 exd5 22. Qe2 Nf2 23. Kh2 Be6 24. Qc2 Nd3 25. Bg7 Kg8 26. Rf1 Bf5 27. gxf5 - Nov 01 05:10 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Nd3 25. Bg7 Kg8 26. Rf1 Bf5
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. O-O Bd6 8. Ne5 Bxe5 9. Kh1 d6 10. h4 Nh6 11. Bd2 O-O 12. g4 b6 13. c4 f5 14. f4 fxe4 15. f5 Nb4 16. Be8 Kh8 17. Bf7 Nxf7 18. d5 Nd3 19. fxg6 Qe8 20. Rf7 Qxf7 21. Bh6 exd5 22. Qe2 Nf2 23. Kh2 Be6 24. Qc2 Nd3 25. Bg7 Kg8 26. Rf1 Bf5 - Nov 01 05:10 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 24. Qc2 Nd3 25. Bg7 Kg8 26. Rf1
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. O-O Bd6 8. Ne5 Bxe5 9. Kh1 d6 10. h4 Nh6 11. Bd2 O-O 12. g4 b6 13. c4 f5 14. f4 fxe4 15. f5 Nb4 16. Be8 Kh8 17. Bf7 Nxf7 18. d5 Nd3 19. fxg6 Qe8 20. Rf7 Qxf7 21. Bh6 exd5 22. Qe2 Nf2 23. Kh2 Be6 24. Qc2 Nd3 25. Bg7 Kg8 26. Rf1 - Nov 01 05:10 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Be6 24. Qc2 Nd3 25. Bg7 Kg8
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. O-O Bd6 8. Ne5 Bxe5 9. Kh1 d6 10. h4 Nh6 11. Bd2 O-O 12. g4 b6 13. c4 f5 14. f4 fxe4 15. f5 Nb4 16. Be8 Kh8 17. Bf7 Nxf7 18. d5 Nd3 19. fxg6 Qe8 20. Rf7 Qxf7 21. Bh6 exd5 22. Qe2 Nf2 23. Kh2 Be6 24. Qc2 Nd3 25. Bg7 Kg8 - Nov 01 05:10 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 23. Kh2 Be6 24. Qc2 Nd3 25. Bg7
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. O-O Bd6 8. Ne5 Bxe5 9. Kh1 d6 10. h4 Nh6 11. Bd2 O-O 12. g4 b6 13. c4 f5 14. f4 fxe4 15. f5 Nb4 16. Be8 Kh8 17. Bf7 Nxf7 18. d5 Nd3 19. fxg6 Qe8 20. Rf7 Qxf7 21. Bh6 exd5 22. Qe2 Nf2 23. Kh2 Be6 24. Qc2 Nd3 25. Bg7 - Nov 01 05:10 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Nf2 23. Kh2 Be6 24. Qc2 Nd3
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. O-O Bd6 8. Ne5 Bxe5 9. Kh1 d6 10. h4 Nh6 11. Bd2 O-O 12. g4 b6 13. c4 f5 14. f4 fxe4 15. f5 Nb4 16. Be8 Kh8 17. Bf7 Nxf7 18. d5 Nd3 19. fxg6 Qe8 20. Rf7 Qxf7 21. Bh6 exd5 22. Qe2 Nf2 23. Kh2 Be6 24. Qc2 Nd3