79.0M
positions
15.1M
practically solved
284.87T
engine nodes
2.2M
analyses
7,341
in queue
7
active workers
42
active cores
4.3M
nodes / sec
14.6
positions / min
82
proof number
4,106
disproof number
Root conquest: 0/20 first moves solved · 19.2% of tree positions solved · last 24h: 388,161 closures, 6.02T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 69 over 218 open obligations, of which 41 (18.8%) 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 1.2d (median of 13) · measured at 2026-10-08 15:00 UTC
Closures by source, last 24h (388132 of 388132 labelled): USER 96.5% (374460) · FILL 0.4% (1651) · AUTO 3.1% (11927) · SOLVE 0.0% (0) · NONE 0.0% (94) · last 7d (1838598 of 1838627): USER 99.0% (1820445) · FILL 0.1% (2071) · AUTO 0.7% (11952) · SOLVE 0.0% (0) · NONE 0.2% (4130). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nh3 d5 2. Nc3 h6 … axb4 13. a3 b6 14. g4 Be7 (User) · 512.0M nodes · BManBJ-Blake-atomicdb
- 1. d4 Nh6 2. f3 d5 … 8. Nd5 Qxd5 9. Bd3 Nd7 10. h4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … g5 15. Nc7 Nxc7 16. Qe2 Bf6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. e4 e6 … Be1 25. f5 Bf2 26. fxe6 Bf5 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … g5 15. Nc7 Nxc7 16. Qe2 Bxh6 (User) · 128.0M nodes · MoNiKaMaDnEsS-DESKTOP-VG9VPVH-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 | 1025 | 2 | |
| g1h3 | unsolved | 820 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 405 | 2 | |
| e2e4 | unsolved | 405 | 2 | |
| b1c3 | unsolved | 127 | 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 | Torom 50.4% of the fleet | 3.04T | 23,124 |
| 2 | BManBJ 25.3% of the fleet | 1.53T | 10,653 |
| 3 | randomchampgamer 11.0% of the fleet | 663.76B | 4,856 |
| 4 | RickEdinson 7.3% of the fleet | 439.40B | 2,989 |
| 5 | tenzink 3.1% of the fleet | 186.61B | 1,142 |
| 6 | MoNiKaMaDnEsS 2.8% of the fleet | 167.84B | 1,466 |
| 7 | soothdest <0.1% of the fleet | 2.73B | 31 |
| 8 | NeoArcturus <0.1% of the fleet | 546.0M | 5 |
8 accounts · 6.02T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 31.7% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.0% of the fleet | 42.83T | 349,427 |
| 3 | BManBJ 14.9% of the fleet | 42.49T | 298,041 |
| 4 | auranvesdranor 11.0% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 5.6% of the fleet | 16.03T | 117,699 |
| 6 | RickEdinson 3.7% of the fleet | 10.65T | 71,217 |
| 7 | JackIV 3.5% of the fleet | 10.06T | 67,859 |
| 8 | gannet 2.5% of the fleet | 7.24T | 46,848 |
| 9 | Torom 2.5% of the fleet | 7.23T | 54,828 |
| 10 | MoNiKaMaDnEsS 2.2% of the fleet | 6.16T | 41,703 |
and 25 more.
35 accounts · 284.98T 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 08 15:57 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … g5 14. Nc7 Nxc7 15. Qe2 cxb5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bh3 7. Nc3 e6 8. Nd5 Na6 9. Nxh8 Bg4 10. f3 Bh3 11. d4 g6 12. Bh6 Bg7 13. gxh3 g5 14. Nc7 Nxc7 15. Qe2 cxb5 - Oct 08 15:57 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Kd7 23. Rc7 Kd8 24. Bg5 Bf6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bh3 7. Nc3 e6 8. Nd5 Na6 9. Nxh8 Bg4 10. f3 Bh3 11. d4 g6 12. Bh6 Bg7 13. gxh3 g5 14. Nc7 Nxc7 15. Qe2 cxb5 16. f4 b5 17. Rc1 g4 18. f5 e5 19. f6 Kd8 20. f7 Kc7 21. c4 d5 22. cxd5 Kd7 23. Rc7 Kd8 24. Bg5 Bf6 - Oct 08 15:57 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 22. cxd5 Kd7 23. Rc7 Kd8 24. Bg5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bh3 7. Nc3 e6 8. Nd5 Na6 9. Nxh8 Bg4 10. f3 Bh3 11. d4 g6 12. Bh6 Bg7 13. gxh3 g5 14. Nc7 Nxc7 15. Qe2 cxb5 16. f4 b5 17. Rc1 g4 18. f5 e5 19. f6 Kd8 20. f7 Kc7 21. c4 d5 22. cxd5 Kd7 23. Rc7 Kd8 24. Bg5 - Oct 08 15:57 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … d5 22. cxd5 Kd7 23. Rc7 Kd8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bh3 7. Nc3 e6 8. Nd5 Na6 9. Nxh8 Bg4 10. f3 Bh3 11. d4 g6 12. Bh6 Bg7 13. gxh3 g5 14. Nc7 Nxc7 15. Qe2 cxb5 16. f4 b5 17. Rc1 g4 18. f5 e5 19. f6 Kd8 20. f7 Kc7 21. c4 d5 22. cxd5 Kd7 23. Rc7 Kd8 - Oct 08 15:57 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 21. c4 d5 22. cxd5 Kd7 23. Rc7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bh3 7. Nc3 e6 8. Nd5 Na6 9. Nxh8 Bg4 10. f3 Bh3 11. d4 g6 12. Bh6 Bg7 13. gxh3 g5 14. Nc7 Nxc7 15. Qe2 cxb5 16. f4 b5 17. Rc1 g4 18. f5 e5 19. f6 Kd8 20. f7 Kc7 21. c4 d5 22. cxd5 Kd7 23. Rc7 - Oct 08 15:57 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Kc7 21. c4 d5 22. cxd5 Kd7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bh3 7. Nc3 e6 8. Nd5 Na6 9. Nxh8 Bg4 10. f3 Bh3 11. d4 g6 12. Bh6 Bg7 13. gxh3 g5 14. Nc7 Nxc7 15. Qe2 cxb5 16. f4 b5 17. Rc1 g4 18. f5 e5 19. f6 Kd8 20. f7 Kc7 21. c4 d5 22. cxd5 Kd7 - Oct 08 15:57 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 20. f7 Kc7 21. c4 d5 22. cxd5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bh3 7. Nc3 e6 8. Nd5 Na6 9. Nxh8 Bg4 10. f3 Bh3 11. d4 g6 12. Bh6 Bg7 13. gxh3 g5 14. Nc7 Nxc7 15. Qe2 cxb5 16. f4 b5 17. Rc1 g4 18. f5 e5 19. f6 Kd8 20. f7 Kc7 21. c4 d5 22. cxd5 - Oct 08 15:57 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Kd8 20. f7 Kc7 21. c4 d5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bh3 7. Nc3 e6 8. Nd5 Na6 9. Nxh8 Bg4 10. f3 Bh3 11. d4 g6 12. Bh6 Bg7 13. gxh3 g5 14. Nc7 Nxc7 15. Qe2 cxb5 16. f4 b5 17. Rc1 g4 18. f5 e5 19. f6 Kd8 20. f7 Kc7 21. c4 d5 - Oct 08 15:57 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 19. f6 Kd8 20. f7 Kc7 21. c4
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bh3 7. Nc3 e6 8. Nd5 Na6 9. Nxh8 Bg4 10. f3 Bh3 11. d4 g6 12. Bh6 Bg7 13. gxh3 g5 14. Nc7 Nxc7 15. Qe2 cxb5 16. f4 b5 17. Rc1 g4 18. f5 e5 19. f6 Kd8 20. f7 Kc7 21. c4 - Oct 08 15:57 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … e5 19. f6 Kd8 20. f7 Kc7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bh3 7. Nc3 e6 8. Nd5 Na6 9. Nxh8 Bg4 10. f3 Bh3 11. d4 g6 12. Bh6 Bg7 13. gxh3 g5 14. Nc7 Nxc7 15. Qe2 cxb5 16. f4 b5 17. Rc1 g4 18. f5 e5 19. f6 Kd8 20. f7 Kc7 - Oct 08 15:57 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 18. f5 e5 19. f6 Kd8 20. f7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bh3 7. Nc3 e6 8. Nd5 Na6 9. Nxh8 Bg4 10. f3 Bh3 11. d4 g6 12. Bh6 Bg7 13. gxh3 g5 14. Nc7 Nxc7 15. Qe2 cxb5 16. f4 b5 17. Rc1 g4 18. f5 e5 19. f6 Kd8 20. f7 - Oct 08 15:57 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … g4 18. f5 e5 19. f6 Kd8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bh3 7. Nc3 e6 8. Nd5 Na6 9. Nxh8 Bg4 10. f3 Bh3 11. d4 g6 12. Bh6 Bg7 13. gxh3 g5 14. Nc7 Nxc7 15. Qe2 cxb5 16. f4 b5 17. Rc1 g4 18. f5 e5 19. f6 Kd8