85.5M
positions
16.3M
practically solved
312.98T
engine nodes
2.4M
analyses
38
in queue
5
active workers
28
active cores
0
nodes / sec
10.7
positions / min
150
proof number
4,733
disproof number
Root conquest: 0/20 first moves solved · 19.1% of tree positions solved · last 24h: 97,922 closures, 2.21T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 over 210 open obligations, of which 39 (18.6%) 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 39.9d (median of 2) · measured at 2026-10-16 20:00 UTC
Closures by source, last 24h (97922 of 97922 labelled): USER 63.2% (61932) · FILL 1.7% (1626) · AUTO 35.0% (34301) · SOLVE 0.0% (0) · NONE 0.1% (63) · last 7d (715128 of 715128): USER 88.2% (630610) · FILL 0.9% (6203) · AUTO 10.9% (77832) · SOLVE 0.0% (0) · NONE 0.1% (483). 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 Nh6 … Bf5 13. gxf5 Qf6 14. Qd4 Qf4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 Nh6 … Bf5 13. gxf5 Qf6 14. Qd4 Qf3 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. Nc3 Nh6 … Bf5 13. gxf5 Qf6 14. Qd4 Qh4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nh3 d5 2. Nc3 h6 … Be1 16. f4 g5 17. g3 Rae8 (User) · 512.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 Nh6 … Bf5 13. gxf5 Qf6 14. Qd4 Re8 (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 | 1143 | 2 | |
| g1h3 | unsolved | 763 | 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 | BManBJ 65.9% of the fleet | 1.46T | 16,923 |
| 2 | RickEdinson 19.1% of the fleet | 422.65B | 4,939 |
| 3 | MoNiKaMaDnEsS 14.9% of the fleet | 328.43B | 3,676 |
| 4 | randomchampgamer 0.1% of the fleet | 2.74B | 28 |
4 accounts · 2.21T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 28.8% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 16.8% of the fleet | 52.64T | 374,199 |
| 3 | tenzink 13.7% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.0% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 6.3% of the fleet | 19.85T | 140,897 |
| 6 | Torom 5.0% of the fleet | 15.70T | 113,354 |
| 7 | RickEdinson 4.5% of the fleet | 14.08T | 95,399 |
| 8 | JackIV 3.2% of the fleet | 10.06T | 67,859 |
| 9 | MoNiKaMaDnEsS 2.7% of the fleet | 8.35T | 57,610 |
| 10 | gannet 2.3% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 313.04T 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 16 20:48 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f6 … g5 8. Nd5 Bh6 9. Kf2 Qxb3
1. Nf3 d6 2. Ng5 f6 3. f4 c6 4. Nc3 Qb6 5. Nxh7 Qc5 6. b3 Qa3 7. f5 g5 8. Nd5 Bh6 9. Kf2 Qxb3 - Oct 16 20:48 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. e4 e6 … Bf5 13. gxf5 Qf6 14. Qd4 Rb8
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 Bd6 6. Ne5 Bxe5 7. Bf4 d6 8. Nb5 O-O 9. Nxa7 f5 10. Qd2 fxe4 11. O-O-O e5 12. dxe5 Bf5 13. gxf5 Qf6 14. Qd4 Rb8 - Oct 16 20:48 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Kh4 31. Re4 Kg5 32. Qf5 Kh6
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 Bd6 6. Ne5 Bxe5 7. Bf4 d6 8. Nb5 O-O 9. Nxa7 f5 10. Qd2 fxe4 11. O-O-O e5 12. dxe5 Bf5 13. gxf5 Qf6 14. Qd4 Rb8 15. Re1 Qe5 16. Bd3 g6 17. Bxg6 Qg5 18. Qf4 Qg6 19. Qf5 Re8 20. Re7 Rxe7 21. Re1 Qxf5 22. f4 b5 23. f5 b4 24. Re8 Kf7 25. Rf8 Ke7 26. f6 Ke6 27. Re8 Kf5 28. f7 b3 29. c4 Kg4 30. f8=Q Kh4 31. Re4 Kg5 32. Qf5 Kh6 - Oct 16 20:48 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 30. f8=Q Kh4 31. Re4 Kg5 32. Qf5
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 Bd6 6. Ne5 Bxe5 7. Bf4 d6 8. Nb5 O-O 9. Nxa7 f5 10. Qd2 fxe4 11. O-O-O e5 12. dxe5 Bf5 13. gxf5 Qf6 14. Qd4 Rb8 15. Re1 Qe5 16. Bd3 g6 17. Bxg6 Qg5 18. Qf4 Qg6 19. Qf5 Re8 20. Re7 Rxe7 21. Re1 Qxf5 22. f4 b5 23. f5 b4 24. Re8 Kf7 25. Rf8 Ke7 26. f6 Ke6 27. Re8 Kf5 28. f7 b3 29. c4 Kg4 30. f8=Q Kh4 31. Re4 Kg5 32. Qf5 - Oct 16 20:48 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Kg4 30. f8=Q Kh4 31. Re4 Kg5
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 Bd6 6. Ne5 Bxe5 7. Bf4 d6 8. Nb5 O-O 9. Nxa7 f5 10. Qd2 fxe4 11. O-O-O e5 12. dxe5 Bf5 13. gxf5 Qf6 14. Qd4 Rb8 15. Re1 Qe5 16. Bd3 g6 17. Bxg6 Qg5 18. Qf4 Qg6 19. Qf5 Re8 20. Re7 Rxe7 21. Re1 Qxf5 22. f4 b5 23. f5 b4 24. Re8 Kf7 25. Rf8 Ke7 26. f6 Ke6 27. Re8 Kf5 28. f7 b3 29. c4 Kg4 30. f8=Q Kh4 31. Re4 Kg5 - Oct 16 20:48 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 29. c4 Kg4 30. f8=Q Kh4 31. Re4
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 Bd6 6. Ne5 Bxe5 7. Bf4 d6 8. Nb5 O-O 9. Nxa7 f5 10. Qd2 fxe4 11. O-O-O e5 12. dxe5 Bf5 13. gxf5 Qf6 14. Qd4 Rb8 15. Re1 Qe5 16. Bd3 g6 17. Bxg6 Qg5 18. Qf4 Qg6 19. Qf5 Re8 20. Re7 Rxe7 21. Re1 Qxf5 22. f4 b5 23. f5 b4 24. Re8 Kf7 25. Rf8 Ke7 26. f6 Ke6 27. Re8 Kf5 28. f7 b3 29. c4 Kg4 30. f8=Q Kh4 31. Re4 - Oct 16 20:48 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … b3 29. c4 Kg4 30. f8=Q Kh4
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 Bd6 6. Ne5 Bxe5 7. Bf4 d6 8. Nb5 O-O 9. Nxa7 f5 10. Qd2 fxe4 11. O-O-O e5 12. dxe5 Bf5 13. gxf5 Qf6 14. Qd4 Rb8 15. Re1 Qe5 16. Bd3 g6 17. Bxg6 Qg5 18. Qf4 Qg6 19. Qf5 Re8 20. Re7 Rxe7 21. Re1 Qxf5 22. f4 b5 23. f5 b4 24. Re8 Kf7 25. Rf8 Ke7 26. f6 Ke6 27. Re8 Kf5 28. f7 b3 29. c4 Kg4 30. f8=Q Kh4 - Oct 16 20:48 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 28. f7 b3 29. c4 Kg4 30. f8=Q
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 Bd6 6. Ne5 Bxe5 7. Bf4 d6 8. Nb5 O-O 9. Nxa7 f5 10. Qd2 fxe4 11. O-O-O e5 12. dxe5 Bf5 13. gxf5 Qf6 14. Qd4 Rb8 15. Re1 Qe5 16. Bd3 g6 17. Bxg6 Qg5 18. Qf4 Qg6 19. Qf5 Re8 20. Re7 Rxe7 21. Re1 Qxf5 22. f4 b5 23. f5 b4 24. Re8 Kf7 25. Rf8 Ke7 26. f6 Ke6 27. Re8 Kf5 28. f7 b3 29. c4 Kg4 30. f8=Q - Oct 16 20:48 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Kf5 28. f7 b3 29. c4 Kg4
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 Bd6 6. Ne5 Bxe5 7. Bf4 d6 8. Nb5 O-O 9. Nxa7 f5 10. Qd2 fxe4 11. O-O-O e5 12. dxe5 Bf5 13. gxf5 Qf6 14. Qd4 Rb8 15. Re1 Qe5 16. Bd3 g6 17. Bxg6 Qg5 18. Qf4 Qg6 19. Qf5 Re8 20. Re7 Rxe7 21. Re1 Qxf5 22. f4 b5 23. f5 b4 24. Re8 Kf7 25. Rf8 Ke7 26. f6 Ke6 27. Re8 Kf5 28. f7 b3 29. c4 Kg4 - Oct 16 20:48 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 27. Re8 Kf5 28. f7 b3 29. c4
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 Bd6 6. Ne5 Bxe5 7. Bf4 d6 8. Nb5 O-O 9. Nxa7 f5 10. Qd2 fxe4 11. O-O-O e5 12. dxe5 Bf5 13. gxf5 Qf6 14. Qd4 Rb8 15. Re1 Qe5 16. Bd3 g6 17. Bxg6 Qg5 18. Qf4 Qg6 19. Qf5 Re8 20. Re7 Rxe7 21. Re1 Qxf5 22. f4 b5 23. f5 b4 24. Re8 Kf7 25. Rf8 Ke7 26. f6 Ke6 27. Re8 Kf5 28. f7 b3 29. c4 - Oct 16 20:48 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Ke6 27. Re8 Kf5 28. f7 b3
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 Bd6 6. Ne5 Bxe5 7. Bf4 d6 8. Nb5 O-O 9. Nxa7 f5 10. Qd2 fxe4 11. O-O-O e5 12. dxe5 Bf5 13. gxf5 Qf6 14. Qd4 Rb8 15. Re1 Qe5 16. Bd3 g6 17. Bxg6 Qg5 18. Qf4 Qg6 19. Qf5 Re8 20. Re7 Rxe7 21. Re1 Qxf5 22. f4 b5 23. f5 b4 24. Re8 Kf7 25. Rf8 Ke7 26. f6 Ke6 27. Re8 Kf5 28. f7 b3 - Oct 16 20:48 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 26. f6 Ke6 27. Re8 Kf5 28. f7
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 Bd6 6. Ne5 Bxe5 7. Bf4 d6 8. Nb5 O-O 9. Nxa7 f5 10. Qd2 fxe4 11. O-O-O e5 12. dxe5 Bf5 13. gxf5 Qf6 14. Qd4 Rb8 15. Re1 Qe5 16. Bd3 g6 17. Bxg6 Qg5 18. Qf4 Qg6 19. Qf5 Re8 20. Re7 Rxe7 21. Re1 Qxf5 22. f4 b5 23. f5 b4 24. Re8 Kf7 25. Rf8 Ke7 26. f6 Ke6 27. Re8 Kf5 28. f7