75.8M
positions
14.2M
practically solved
272.55T
engine nodes
2.1M
analyses
408
in queue
9
active workers
48
active cores
16.8M
nodes / sec
13.6
positions / min
82
proof number
3,796
disproof number
Root conquest: 0/20 first moves solved · 18.7% of tree positions solved · last 24h: 213,857 closures, 3.67T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 68 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 22.0h (median of 2) · measured at 2026-10-06 02:00 UTC
Closures by source, last 24h (213747 of 213747 labelled): USER 99.8% (213217) · FILL 0.1% (189) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.2% (341) · last 7d (2072623 of 2072733): USER 99.8% (2067688) · FILL 0.0% (189) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.2% (4746). 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. e4 e6 … Bxc4 30. Rh8 Bd2 31. b4 Bg5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … 29. Bf5 Bxc4 30. Rh8 Bd2 31. b4 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. e4 e6 … Bxc4 30. Rh8 Bd2 31. Rxf8 Bc1 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. e4 e6 … Bxc4 30. Rh8 Bd2 31. Rxf8 Bg5 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … Bg4 27. Rh1 Bh3 28. Ka1 Kh6 (User) · 512.0M nodes · randomchampgamer-2026PC-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 | 1026 | 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 42.2% of the fleet | 1.55T | 9,307 |
| 2 | tenzink 19.3% of the fleet | 708.51B | 4,082 |
| 3 | randomchampgamer 18.5% of the fleet | 677.74B | 3,934 |
| 4 | RickEdinson 13.4% of the fleet | 493.01B | 2,913 |
| 5 | MoNiKaMaDnEsS 6.4% of the fleet | 235.59B | 1,562 |
| 6 | quasa 0.1% of the fleet | 3.35B | 27 |
| 7 | soothdest <0.1% of the fleet | 474.8M | 26 |
7 accounts · 3.67T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 33.1% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.3% of the fleet | 41.62T | 341,298 |
| 3 | BManBJ 14.2% of the fleet | 38.60T | 271,488 |
| 4 | auranvesdranor 11.5% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 5.3% of the fleet | 14.41T | 106,204 |
| 6 | JackIV 3.7% of the fleet | 10.06T | 67,859 |
| 7 | RickEdinson 3.5% of the fleet | 9.50T | 63,594 |
| 8 | gannet 2.7% of the fleet | 7.24T | 46,848 |
| 9 | MoNiKaMaDnEsS 2.0% of the fleet | 5.55T | 37,156 |
| 10 | NeoArcturus 1.5% of the fleet | 4.09T | 16,758 |
and 25 more.
35 accounts · 272.67T 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 02:53 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … Kd8 16. Qb1 a6 17. Qg6 Rf6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 Qa4 5. d4 h5 6. Bg5 Nf6 7. Bb5 Nc6 8. Nd8 Qb4 9. c3 e6 10. Nxb7 c6 11. cxb4 d5 12. Bh6 gxh6 13. exf5 Bb4 14. Nc3 Rf8 15. f4 Kd8 16. Qb1 a6 17. Qg6 Rf6 - Oct 06 02:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 25. f6 a5 26. f7 c5 27. f8=Q
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 Qa4 5. d4 h5 6. Bg5 Nf6 7. Bb5 Nc6 8. Nd8 Qb4 9. c3 e6 10. Nxb7 c6 11. cxb4 d5 12. Bh6 gxh6 13. exf5 Bb4 14. Nc3 Rf8 15. f4 Kd8 16. Qb1 a6 17. Qg6 Rf6 18. Qg7 Rf7 19. Qg6 Kc8 20. Kd1 Rf8 21. Re1 Rg8 22. Qf7 Be7 23. Qe8 Rxe8 24. f5 Kc7 25. f6 a5 26. f7 c5 27. f8=Q - Oct 06 02:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Kc7 25. f6 a5 26. f7 c5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 Qa4 5. d4 h5 6. Bg5 Nf6 7. Bb5 Nc6 8. Nd8 Qb4 9. c3 e6 10. Nxb7 c6 11. cxb4 d5 12. Bh6 gxh6 13. exf5 Bb4 14. Nc3 Rf8 15. f4 Kd8 16. Qb1 a6 17. Qg6 Rf6 18. Qg7 Rf7 19. Qg6 Kc8 20. Kd1 Rf8 21. Re1 Rg8 22. Qf7 Be7 23. Qe8 Rxe8 24. f5 Kc7 25. f6 a5 26. f7 c5 - Oct 06 02:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 24. f5 Kc7 25. f6 a5 26. f7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 Qa4 5. d4 h5 6. Bg5 Nf6 7. Bb5 Nc6 8. Nd8 Qb4 9. c3 e6 10. Nxb7 c6 11. cxb4 d5 12. Bh6 gxh6 13. exf5 Bb4 14. Nc3 Rf8 15. f4 Kd8 16. Qb1 a6 17. Qg6 Rf6 18. Qg7 Rf7 19. Qg6 Kc8 20. Kd1 Rf8 21. Re1 Rg8 22. Qf7 Be7 23. Qe8 Rxe8 24. f5 Kc7 25. f6 a5 26. f7 - Oct 06 02:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Rxe8 24. f5 Kc7 25. f6 a5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 Qa4 5. d4 h5 6. Bg5 Nf6 7. Bb5 Nc6 8. Nd8 Qb4 9. c3 e6 10. Nxb7 c6 11. cxb4 d5 12. Bh6 gxh6 13. exf5 Bb4 14. Nc3 Rf8 15. f4 Kd8 16. Qb1 a6 17. Qg6 Rf6 18. Qg7 Rf7 19. Qg6 Kc8 20. Kd1 Rf8 21. Re1 Rg8 22. Qf7 Be7 23. Qe8 Rxe8 24. f5 Kc7 25. f6 a5 - Oct 06 02:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 23. Qe8 Rxe8 24. f5 Kc7 25. f6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 Qa4 5. d4 h5 6. Bg5 Nf6 7. Bb5 Nc6 8. Nd8 Qb4 9. c3 e6 10. Nxb7 c6 11. cxb4 d5 12. Bh6 gxh6 13. exf5 Bb4 14. Nc3 Rf8 15. f4 Kd8 16. Qb1 a6 17. Qg6 Rf6 18. Qg7 Rf7 19. Qg6 Kc8 20. Kd1 Rf8 21. Re1 Rg8 22. Qf7 Be7 23. Qe8 Rxe8 24. f5 Kc7 25. f6 - Oct 06 02:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Be7 23. Qe8 Rxe8 24. f5 Kc7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 Qa4 5. d4 h5 6. Bg5 Nf6 7. Bb5 Nc6 8. Nd8 Qb4 9. c3 e6 10. Nxb7 c6 11. cxb4 d5 12. Bh6 gxh6 13. exf5 Bb4 14. Nc3 Rf8 15. f4 Kd8 16. Qb1 a6 17. Qg6 Rf6 18. Qg7 Rf7 19. Qg6 Kc8 20. Kd1 Rf8 21. Re1 Rg8 22. Qf7 Be7 23. Qe8 Rxe8 24. f5 Kc7 - Oct 06 02:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 22. Qf7 Be7 23. Qe8 Rxe8 24. f5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 Qa4 5. d4 h5 6. Bg5 Nf6 7. Bb5 Nc6 8. Nd8 Qb4 9. c3 e6 10. Nxb7 c6 11. cxb4 d5 12. Bh6 gxh6 13. exf5 Bb4 14. Nc3 Rf8 15. f4 Kd8 16. Qb1 a6 17. Qg6 Rf6 18. Qg7 Rf7 19. Qg6 Kc8 20. Kd1 Rf8 21. Re1 Rg8 22. Qf7 Be7 23. Qe8 Rxe8 24. f5 - Oct 06 02:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Rg8 22. Qf7 Be7 23. Qe8 Rxe8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 Qa4 5. d4 h5 6. Bg5 Nf6 7. Bb5 Nc6 8. Nd8 Qb4 9. c3 e6 10. Nxb7 c6 11. cxb4 d5 12. Bh6 gxh6 13. exf5 Bb4 14. Nc3 Rf8 15. f4 Kd8 16. Qb1 a6 17. Qg6 Rf6 18. Qg7 Rf7 19. Qg6 Kc8 20. Kd1 Rf8 21. Re1 Rg8 22. Qf7 Be7 23. Qe8 Rxe8 - Oct 06 02:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 21. Re1 Rg8 22. Qf7 Be7 23. Qe8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 Qa4 5. d4 h5 6. Bg5 Nf6 7. Bb5 Nc6 8. Nd8 Qb4 9. c3 e6 10. Nxb7 c6 11. cxb4 d5 12. Bh6 gxh6 13. exf5 Bb4 14. Nc3 Rf8 15. f4 Kd8 16. Qb1 a6 17. Qg6 Rf6 18. Qg7 Rf7 19. Qg6 Kc8 20. Kd1 Rf8 21. Re1 Rg8 22. Qf7 Be7 23. Qe8 - Oct 06 02:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Rf8 21. Re1 Rg8 22. Qf7 Be7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 Qa4 5. d4 h5 6. Bg5 Nf6 7. Bb5 Nc6 8. Nd8 Qb4 9. c3 e6 10. Nxb7 c6 11. cxb4 d5 12. Bh6 gxh6 13. exf5 Bb4 14. Nc3 Rf8 15. f4 Kd8 16. Qb1 a6 17. Qg6 Rf6 18. Qg7 Rf7 19. Qg6 Kc8 20. Kd1 Rf8 21. Re1 Rg8 22. Qf7 Be7 - Oct 06 02:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 20. Kd1 Rf8 21. Re1 Rg8 22. Qf7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 Qa4 5. d4 h5 6. Bg5 Nf6 7. Bb5 Nc6 8. Nd8 Qb4 9. c3 e6 10. Nxb7 c6 11. cxb4 d5 12. Bh6 gxh6 13. exf5 Bb4 14. Nc3 Rf8 15. f4 Kd8 16. Qb1 a6 17. Qg6 Rf6 18. Qg7 Rf7 19. Qg6 Kc8 20. Kd1 Rf8 21. Re1 Rg8 22. Qf7