59.7M
positions
10.0M
practically solved
215.05T
engine nodes
1.7M
analyses
4,881
in queue
12
active workers
84
active cores
2.6M
nodes / sec
29.2
positions / min
131
proof number
3,777
disproof number
Root conquest: 0/20 first moves solved · 16.8% of tree positions solved · last 24h: 447,349 closures, 5.50T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 78 over 170 open obligations, of which 28 (16.5%) 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 9.6m (median of 166) · measured at 2026-09-20 11:00 UTC
Closures by source, last 24h (447349 of 447349 labelled): USER 99.9% (446910) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.1% (439) · last 7d (2320527 of 2320527): USER 99.7% (2314652) · FILL 0.1% (1561) · AUTO 0.0% (559) · SOLVE 0.0% (0) · NONE 0.2% (3755). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nh3 e6 2. e3 g6 … 16. h3 g5 17. e4 h4 18. Kh2 (User) · 128.0M nodes · auranvesdranor-admin-835912-atomicdb
- 1. Nh3 e6 2. e3 g6 … 16. h3 g5 17. e4 h4 18. Rg1 (User) · 128.0M nodes · auranvesdranor-j-002-atomicdb
- 1. Nh3 e6 2. e3 g6 … 16. h3 g5 17. e4 h4 18. Rd1 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Kh8 16. O-O c5 17. Re1 Bh3 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Kh8 16. O-O c5 17. Re1 Bg4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
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 | 1091 | 2 | |
| g1h3 | unsolved | 625 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 435 | 2 | |
| e2e4 | unsolved | 417 | 2 | |
| b1c3 | unsolved | 72 | 2 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b2b4 | unsolved | 0 | 3 | |
| b1a3 | unsolved | 0 | 3 | |
| h2h3 | unsolved | -100 | 2 | |
| a2a3 | unsolved | -103 | 2 | |
| f2f3 | unsolved | -110 | 2 | |
| d2d3 | unsolved | -116 | 2 | |
| b2b3 | unsolved | -119 | 1 | |
| f2f4 | unsolved | -223 | 3 | |
| h2h4 | unsolved | -500 | 2 | |
| a2a4 | unsolved | -502 | 2 | |
| g2g4 | unsolved | -600 | 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 27.7% of the fleet | 1.52T | 11,483 |
| 2 | auranvesdranor 22.8% of the fleet | 1.26T | 9,654 |
| 3 | JackIV 18.4% of the fleet | 1.01T | 5,100 |
| 4 | tenzink 11.0% of the fleet | 605.38B | 4,222 |
| 5 | randomchampgamer 9.3% of the fleet | 514.29B | 4,155 |
| 6 | Torom 8.4% of the fleet | 464.11B | 3,174 |
| 7 | MoNiKaMaDnEsS 2.2% of the fleet | 120.58B | 891 |
| 8 | soothdest 0.2% of the fleet | 9.39B | 75 |
8 accounts · 5.50T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 37.0% of the fleet | 79.65T | 677,611 |
| 2 | tenzink 16.3% of the fleet | 34.99T | 296,186 |
| 3 | auranvesdranor 11.5% of the fleet | 24.71T | 178,214 |
| 4 | BManBJ 11.3% of the fleet | 24.24T | 165,812 |
| 5 | JackIV 4.6% of the fleet | 9.82T | 66,318 |
| 6 | randomchampgamer 3.8% of the fleet | 8.18T | 59,027 |
| 7 | RickEdinson 2.9% of the fleet | 6.32T | 41,667 |
| 8 | NeoArcturus 1.9% of the fleet | 4.09T | 16,756 |
| 9 | MoNiKaMaDnEsS 1.8% of the fleet | 3.96T | 25,268 |
| 10 | ijh 1.7% of the fleet | 3.57T | 37,348 |
and 22 more.
32 accounts · 215.19T 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 · 16 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
- Refuting 1... d61. Nf3 d6 2. Nc3proposed by randomchampgamer · 3 votes
- The weaker of the two f-pawn advances for 1. ...d61. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4proposed by MoNiKaMaDnEsS · 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
- Is Nh3 h6 e3 e6 Nc3 a draw?1. Nh3 e6 2. e3 h6 3. Nc3proposed by soothdest · 3 votes
Showing the 6 most voted of 19 proposals · see every proposal
Milestones
- Sep 20 11:44 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … Kh8 16. O-O c5 17. Re1 Bf5
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 f4 8. Nc3 Nf6 9. Nd8 Bg4 10. Qd2 g6 11. Nd5 Nxe4 12. Nxb7 Bg7 13. Qa5 O-O 14. f3 Be6 15. b3 Kh8 16. O-O c5 17. Re1 Bf5 - Sep 20 11:44 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Rf8 27. Rxe7 Kg7 28. Qg8 Kf6
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 f4 8. Nc3 Nf6 9. Nd8 Bg4 10. Qd2 g6 11. Nd5 Nxe4 12. Nxb7 Bg7 13. Qa5 O-O 14. f3 Be6 15. b3 Kh8 16. O-O c5 17. Re1 Bf5 18. Bxf4 Rc8 19. Qa4 cxd4 20. Qd7 Rf8 21. h3 Bd4 22. Kh1 Be5 23. Rxe5 Rf7 24. Re1 Rf8 25. Qe6 Rf7 26. Qc8 Rf8 27. Rxe7 Kg7 28. Qg8 Kf6 - Sep 20 11:44 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 26. Qc8 Rf8 27. Rxe7 Kg7 28. Qg8
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 f4 8. Nc3 Nf6 9. Nd8 Bg4 10. Qd2 g6 11. Nd5 Nxe4 12. Nxb7 Bg7 13. Qa5 O-O 14. f3 Be6 15. b3 Kh8 16. O-O c5 17. Re1 Bf5 18. Bxf4 Rc8 19. Qa4 cxd4 20. Qd7 Rf8 21. h3 Bd4 22. Kh1 Be5 23. Rxe5 Rf7 24. Re1 Rf8 25. Qe6 Rf7 26. Qc8 Rf8 27. Rxe7 Kg7 28. Qg8 - Sep 20 11:44 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Rf7 26. Qc8 Rf8 27. Rxe7 Kg7
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 f4 8. Nc3 Nf6 9. Nd8 Bg4 10. Qd2 g6 11. Nd5 Nxe4 12. Nxb7 Bg7 13. Qa5 O-O 14. f3 Be6 15. b3 Kh8 16. O-O c5 17. Re1 Bf5 18. Bxf4 Rc8 19. Qa4 cxd4 20. Qd7 Rf8 21. h3 Bd4 22. Kh1 Be5 23. Rxe5 Rf7 24. Re1 Rf8 25. Qe6 Rf7 26. Qc8 Rf8 27. Rxe7 Kg7 - Sep 20 11:44 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 25. Qe6 Rf7 26. Qc8 Rf8 27. Rxe7
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 f4 8. Nc3 Nf6 9. Nd8 Bg4 10. Qd2 g6 11. Nd5 Nxe4 12. Nxb7 Bg7 13. Qa5 O-O 14. f3 Be6 15. b3 Kh8 16. O-O c5 17. Re1 Bf5 18. Bxf4 Rc8 19. Qa4 cxd4 20. Qd7 Rf8 21. h3 Bd4 22. Kh1 Be5 23. Rxe5 Rf7 24. Re1 Rf8 25. Qe6 Rf7 26. Qc8 Rf8 27. Rxe7 - Sep 20 11:44 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Rf8 25. Qe6 Rf7 26. Qc8 Rf8
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 f4 8. Nc3 Nf6 9. Nd8 Bg4 10. Qd2 g6 11. Nd5 Nxe4 12. Nxb7 Bg7 13. Qa5 O-O 14. f3 Be6 15. b3 Kh8 16. O-O c5 17. Re1 Bf5 18. Bxf4 Rc8 19. Qa4 cxd4 20. Qd7 Rf8 21. h3 Bd4 22. Kh1 Be5 23. Rxe5 Rf7 24. Re1 Rf8 25. Qe6 Rf7 26. Qc8 Rf8 - Sep 20 11:44 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 24. Re1 Rf8 25. Qe6 Rf7 26. Qc8
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 f4 8. Nc3 Nf6 9. Nd8 Bg4 10. Qd2 g6 11. Nd5 Nxe4 12. Nxb7 Bg7 13. Qa5 O-O 14. f3 Be6 15. b3 Kh8 16. O-O c5 17. Re1 Bf5 18. Bxf4 Rc8 19. Qa4 cxd4 20. Qd7 Rf8 21. h3 Bd4 22. Kh1 Be5 23. Rxe5 Rf7 24. Re1 Rf8 25. Qe6 Rf7 26. Qc8 - Sep 20 11:44 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Rf7 24. Re1 Rf8 25. Qe6 Rf7
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 f4 8. Nc3 Nf6 9. Nd8 Bg4 10. Qd2 g6 11. Nd5 Nxe4 12. Nxb7 Bg7 13. Qa5 O-O 14. f3 Be6 15. b3 Kh8 16. O-O c5 17. Re1 Bf5 18. Bxf4 Rc8 19. Qa4 cxd4 20. Qd7 Rf8 21. h3 Bd4 22. Kh1 Be5 23. Rxe5 Rf7 24. Re1 Rf8 25. Qe6 Rf7 - Sep 20 11:44 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 23. Rxe5 Rf7 24. Re1 Rf8 25. Qe6
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 f4 8. Nc3 Nf6 9. Nd8 Bg4 10. Qd2 g6 11. Nd5 Nxe4 12. Nxb7 Bg7 13. Qa5 O-O 14. f3 Be6 15. b3 Kh8 16. O-O c5 17. Re1 Bf5 18. Bxf4 Rc8 19. Qa4 cxd4 20. Qd7 Rf8 21. h3 Bd4 22. Kh1 Be5 23. Rxe5 Rf7 24. Re1 Rf8 25. Qe6 - Sep 20 11:44 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Be5 23. Rxe5 Rf7 24. Re1 Rf8
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 f4 8. Nc3 Nf6 9. Nd8 Bg4 10. Qd2 g6 11. Nd5 Nxe4 12. Nxb7 Bg7 13. Qa5 O-O 14. f3 Be6 15. b3 Kh8 16. O-O c5 17. Re1 Bf5 18. Bxf4 Rc8 19. Qa4 cxd4 20. Qd7 Rf8 21. h3 Bd4 22. Kh1 Be5 23. Rxe5 Rf7 24. Re1 Rf8 - Sep 20 11:44 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 22. Kh1 Be5 23. Rxe5 Rf7 24. Re1
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 f4 8. Nc3 Nf6 9. Nd8 Bg4 10. Qd2 g6 11. Nd5 Nxe4 12. Nxb7 Bg7 13. Qa5 O-O 14. f3 Be6 15. b3 Kh8 16. O-O c5 17. Re1 Bf5 18. Bxf4 Rc8 19. Qa4 cxd4 20. Qd7 Rf8 21. h3 Bd4 22. Kh1 Be5 23. Rxe5 Rf7 24. Re1 - Sep 20 11:44 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Bd4 22. Kh1 Be5 23. Rxe5 Rf7
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 f4 8. Nc3 Nf6 9. Nd8 Bg4 10. Qd2 g6 11. Nd5 Nxe4 12. Nxb7 Bg7 13. Qa5 O-O 14. f3 Be6 15. b3 Kh8 16. O-O c5 17. Re1 Bf5 18. Bxf4 Rc8 19. Qa4 cxd4 20. Qd7 Rf8 21. h3 Bd4 22. Kh1 Be5 23. Rxe5 Rf7