103.8M
positions
22.0M
practically solved
382.52T
engine nodes
2.9M
analyses
292
in queue
active workers
28
active cores
22.6M
nodes / sec
5.8
positions / min
107
proof number
4,824
disproof number
Root conquest: 0/20 first moves solved · 21.2% of tree positions solved · last 24h: 245,260 closures, 2.57T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 72 over 203 open obligations, of which 37 (18.2%) 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 2.8h (median of 90) · measured at 2026-10-30 19:00 UTC
Closures by source, last 24h (245260 of 245260 labelled): USER 100.0% (245181) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.0% (79) · last 7d (1412715 of 1412715): USER 98.1% (1386251) · FILL 0.7% (9638) · AUTO 1.2% (16257) · SOLVE 0.0% (0) · NONE 0.0% (569). 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 d6 2. Ng5 f5 … Na6 12. a3 h4 13. g3 Nc5 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#0
- 1. Nf3 d6 2. Ng5 f5 … Na6 12. a3 h4 13. g3 e5 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … Na6 12. a3 h4 13. g3 b6 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 d6 2. Ng5 f5 … Na6 12. a3 h4 13. g3 Nb4 (User) · 512.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … 15. Nd8 a5 16. Nxb7 Kd7 17. O-O (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 | 1169 | 2 | |
| g1h3 | unsolved | 820 | 2 | |
| e2e3 | unsolved | 469 | 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 65.0% of the fleet | 1.67T | 5,929 |
| 2 | MoNiKaMaDnEsS 17.6% of the fleet | 453.09B | 3,594 |
| 3 | RickEdinson 17.3% of the fleet | 446.49B | 2,903 |
| 4 | soothdest <0.1% of the fleet | 896.0M | 7 |
| 5 | NeoArcturus <0.1% of the fleet | 384.4M | 3 |
5 accounts · 2.57T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 23.6% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 20.0% of the fleet | 76.66T | 522,762 |
| 3 | Torom 13.2% of the fleet | 50.55T | 363,522 |
| 4 | tenzink 11.2% of the fleet | 42.83T | 349,427 |
| 5 | auranvesdranor 8.2% of the fleet | 31.40T | 228,002 |
| 6 | RickEdinson 5.4% of the fleet | 20.73T | 135,838 |
| 7 | randomchampgamer 5.2% of the fleet | 19.85T | 140,897 |
| 8 | MoNiKaMaDnEsS 3.2% of the fleet | 12.30T | 85,123 |
| 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 · 382.60T 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 30 20:01 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … Na6 12. a3 h4 13. g3 Nb8
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 a6 10. O-O a5 11. Nxh8 Na6 12. a3 h4 13. g3 Nb8 - Oct 30 20:01 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … d5 27. Qe5 Nd7 28. Qb8 Ka6
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 a6 10. O-O a5 11. Nxh8 Na6 12. a3 h4 13. g3 Nb8 14. f4 Bd7 15. Bh6 Kd8 16. exf5 b5 17. f5 e5 18. dxe5 Ra7 19. Qe2 Kc8 20. Re1 Be7 21. f6 Bd8 22. f7 Be6 23. f8=R Kb7 24. Rf7 Bxf7 25. Qe3 c5 26. Qe4 d5 27. Qe5 Nd7 28. Qb8 Ka6 - Oct 30 20:01 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 26. Qe4 d5 27. Qe5 Nd7 28. Qb8
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 a6 10. O-O a5 11. Nxh8 Na6 12. a3 h4 13. g3 Nb8 14. f4 Bd7 15. Bh6 Kd8 16. exf5 b5 17. f5 e5 18. dxe5 Ra7 19. Qe2 Kc8 20. Re1 Be7 21. f6 Bd8 22. f7 Be6 23. f8=R Kb7 24. Rf7 Bxf7 25. Qe3 c5 26. Qe4 d5 27. Qe5 Nd7 28. Qb8 - Oct 30 20:01 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … c5 26. Qe4 d5 27. Qe5 Nd7
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 a6 10. O-O a5 11. Nxh8 Na6 12. a3 h4 13. g3 Nb8 14. f4 Bd7 15. Bh6 Kd8 16. exf5 b5 17. f5 e5 18. dxe5 Ra7 19. Qe2 Kc8 20. Re1 Be7 21. f6 Bd8 22. f7 Be6 23. f8=R Kb7 24. Rf7 Bxf7 25. Qe3 c5 26. Qe4 d5 27. Qe5 Nd7 - Oct 30 20:01 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 25. Qe3 c5 26. Qe4 d5 27. Qe5
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 a6 10. O-O a5 11. Nxh8 Na6 12. a3 h4 13. g3 Nb8 14. f4 Bd7 15. Bh6 Kd8 16. exf5 b5 17. f5 e5 18. dxe5 Ra7 19. Qe2 Kc8 20. Re1 Be7 21. f6 Bd8 22. f7 Be6 23. f8=R Kb7 24. Rf7 Bxf7 25. Qe3 c5 26. Qe4 d5 27. Qe5 - Oct 30 20:01 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Bxf7 25. Qe3 c5 26. Qe4 d5
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 a6 10. O-O a5 11. Nxh8 Na6 12. a3 h4 13. g3 Nb8 14. f4 Bd7 15. Bh6 Kd8 16. exf5 b5 17. f5 e5 18. dxe5 Ra7 19. Qe2 Kc8 20. Re1 Be7 21. f6 Bd8 22. f7 Be6 23. f8=R Kb7 24. Rf7 Bxf7 25. Qe3 c5 26. Qe4 d5 - Oct 30 20:01 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 24. Rf7 Bxf7 25. Qe3 c5 26. Qe4
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 a6 10. O-O a5 11. Nxh8 Na6 12. a3 h4 13. g3 Nb8 14. f4 Bd7 15. Bh6 Kd8 16. exf5 b5 17. f5 e5 18. dxe5 Ra7 19. Qe2 Kc8 20. Re1 Be7 21. f6 Bd8 22. f7 Be6 23. f8=R Kb7 24. Rf7 Bxf7 25. Qe3 c5 26. Qe4 - Oct 30 20:01 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Kb7 24. Rf7 Bxf7 25. Qe3 c5
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 a6 10. O-O a5 11. Nxh8 Na6 12. a3 h4 13. g3 Nb8 14. f4 Bd7 15. Bh6 Kd8 16. exf5 b5 17. f5 e5 18. dxe5 Ra7 19. Qe2 Kc8 20. Re1 Be7 21. f6 Bd8 22. f7 Be6 23. f8=R Kb7 24. Rf7 Bxf7 25. Qe3 c5 - Oct 30 20:01 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 23. f8=R Kb7 24. Rf7 Bxf7 25. Qe3
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 a6 10. O-O a5 11. Nxh8 Na6 12. a3 h4 13. g3 Nb8 14. f4 Bd7 15. Bh6 Kd8 16. exf5 b5 17. f5 e5 18. dxe5 Ra7 19. Qe2 Kc8 20. Re1 Be7 21. f6 Bd8 22. f7 Be6 23. f8=R Kb7 24. Rf7 Bxf7 25. Qe3 - Oct 30 20:01 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Be6 23. f8=R Kb7 24. Rf7 Bxf7
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 a6 10. O-O a5 11. Nxh8 Na6 12. a3 h4 13. g3 Nb8 14. f4 Bd7 15. Bh6 Kd8 16. exf5 b5 17. f5 e5 18. dxe5 Ra7 19. Qe2 Kc8 20. Re1 Be7 21. f6 Bd8 22. f7 Be6 23. f8=R Kb7 24. Rf7 Bxf7 - Oct 30 20:01 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 22. f7 Be6 23. f8=R Kb7 24. Rf7
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 a6 10. O-O a5 11. Nxh8 Na6 12. a3 h4 13. g3 Nb8 14. f4 Bd7 15. Bh6 Kd8 16. exf5 b5 17. f5 e5 18. dxe5 Ra7 19. Qe2 Kc8 20. Re1 Be7 21. f6 Bd8 22. f7 Be6 23. f8=R Kb7 24. Rf7 - Oct 30 20:01 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Bd8 22. f7 Be6 23. f8=R Kb7
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 a6 10. O-O a5 11. Nxh8 Na6 12. a3 h4 13. g3 Nb8 14. f4 Bd7 15. Bh6 Kd8 16. exf5 b5 17. f5 e5 18. dxe5 Ra7 19. Qe2 Kc8 20. Re1 Be7 21. f6 Bd8 22. f7 Be6 23. f8=R Kb7