77.9M
positions
14.9M
practically solved
280.92T
engine nodes
2.2M
analyses
149
in queue
14
active workers
66
active cores
10.4M
nodes / sec
38.5
positions / min
82
proof number
3,796
disproof number
Root conquest: 0/20 first moves solved · 19.1% of tree positions solved · last 24h: 412,043 closures, 4.33T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 70 over 221 open obligations, of which 42 (19.0%) 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 34.5m (median of 122) · measured at 2026-10-08 01:00 UTC
Closures by source, last 24h (411916 of 411975 labelled): USER 99.8% (411249) · FILL 0.1% (589) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.0% (78) · last 7d (1994510 of 1994578): USER 99.7% (1988884) · FILL 0.1% (1003) · AUTO 0.0% (25) · SOLVE 0.0% (0) · NONE 0.2% (4598). 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 … Bxb5 30. Kg1 Kb7 31. c4 Ng5 (User) · 2.00B nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 a6 … a3 12. b4 g5 13. Qa7 Rb8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. Nc3 a6 … a3 12. b4 g5 13. Qa7 Rc7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. Nc3 a6 … Rc8 12. g3 Bh6 13. Qa7 Bg7 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 a6 … a3 12. b4 g5 13. Qa7 Ra8 (User) · 128.0M 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 | 1083 | 2 | |
| g1h3 | unsolved | 726 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| e2e4 | unsolved | 400 | 2 | |
| d2d4 | unsolved | 306 | 2 | |
| b1c3 | unsolved | 125 | 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 35.5% of the fleet | 1.54T | 10,755 |
| 2 | Torom 20.3% of the fleet | 878.59B | 5,344 |
| 3 | randomchampgamer 14.7% of the fleet | 636.65B | 4,816 |
| 4 | tenzink 13.4% of the fleet | 580.60B | 4,097 |
| 5 | RickEdinson 10.7% of the fleet | 462.42B | 3,221 |
| 6 | MoNiKaMaDnEsS 5.4% of the fleet | 233.68B | 1,719 |
6 accounts · 4.33T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 32.1% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.2% of the fleet | 42.83T | 349,427 |
| 3 | BManBJ 14.8% of the fleet | 41.61T | 291,537 |
| 4 | auranvesdranor 11.2% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 5.6% of the fleet | 15.64T | 114,852 |
| 6 | RickEdinson 3.7% of the fleet | 10.40T | 69,416 |
| 7 | JackIV 3.6% of the fleet | 10.06T | 67,859 |
| 8 | gannet 2.6% of the fleet | 7.24T | 46,848 |
| 9 | MoNiKaMaDnEsS 2.1% of the fleet | 6.01T | 40,335 |
| 10 | Torom 1.8% of the fleet | 5.07T | 37,048 |
and 25 more.
35 accounts · 281.16T 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 01:54 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nc3 a6 … Rc8 12. g3 Rc7 13. Bxa3 Ra7
1. Nf3 f6 2. Nc3 a6 3. Ne5 d6 4. Nf7 Qd7 5. Nd5 e6 6. Nxc7 a5 7. e3 b5 8. Nxh8 a4 9. b4 a3 10. Qg4 g6 11. Qd4 Rc8 12. g3 Rc7 13. Bxa3 Ra7 - Oct 08 01:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 a6 … e4 21. a8=Q Ke7 22. Qb7 Ke8
1. Nf3 f6 2. Nc3 a6 3. Ne5 d6 4. Nf7 Qd7 5. Nd5 e6 6. Nxc7 a5 7. e3 b5 8. Nxh8 a4 9. b4 a3 10. Qg4 g6 11. Qd4 Rc8 12. g3 Rc7 13. Bxa3 Ra7 14. Bd3 d5 15. a4 Bd6 16. Qb6 Rc7 17. Qc6 Rxc6 18. a5 f5 19. a6 e5 20. a7 e4 21. a8=Q Ke7 22. Qb7 Ke8 - Oct 08 01:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 a6 … 20. a7 e4 21. a8=Q Ke7 22. Qb7
1. Nf3 f6 2. Nc3 a6 3. Ne5 d6 4. Nf7 Qd7 5. Nd5 e6 6. Nxc7 a5 7. e3 b5 8. Nxh8 a4 9. b4 a3 10. Qg4 g6 11. Qd4 Rc8 12. g3 Rc7 13. Bxa3 Ra7 14. Bd3 d5 15. a4 Bd6 16. Qb6 Rc7 17. Qc6 Rxc6 18. a5 f5 19. a6 e5 20. a7 e4 21. a8=Q Ke7 22. Qb7 - Oct 08 01:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 a6 … e5 20. a7 e4 21. a8=Q Ke7
1. Nf3 f6 2. Nc3 a6 3. Ne5 d6 4. Nf7 Qd7 5. Nd5 e6 6. Nxc7 a5 7. e3 b5 8. Nxh8 a4 9. b4 a3 10. Qg4 g6 11. Qd4 Rc8 12. g3 Rc7 13. Bxa3 Ra7 14. Bd3 d5 15. a4 Bd6 16. Qb6 Rc7 17. Qc6 Rxc6 18. a5 f5 19. a6 e5 20. a7 e4 21. a8=Q Ke7 - Oct 08 01:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 a6 … 19. a6 e5 20. a7 e4 21. a8=Q
1. Nf3 f6 2. Nc3 a6 3. Ne5 d6 4. Nf7 Qd7 5. Nd5 e6 6. Nxc7 a5 7. e3 b5 8. Nxh8 a4 9. b4 a3 10. Qg4 g6 11. Qd4 Rc8 12. g3 Rc7 13. Bxa3 Ra7 14. Bd3 d5 15. a4 Bd6 16. Qb6 Rc7 17. Qc6 Rxc6 18. a5 f5 19. a6 e5 20. a7 e4 21. a8=Q - Oct 08 01:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 a6 … f5 19. a6 e5 20. a7 e4
1. Nf3 f6 2. Nc3 a6 3. Ne5 d6 4. Nf7 Qd7 5. Nd5 e6 6. Nxc7 a5 7. e3 b5 8. Nxh8 a4 9. b4 a3 10. Qg4 g6 11. Qd4 Rc8 12. g3 Rc7 13. Bxa3 Ra7 14. Bd3 d5 15. a4 Bd6 16. Qb6 Rc7 17. Qc6 Rxc6 18. a5 f5 19. a6 e5 20. a7 e4 - Oct 08 01:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 a6 … 18. a5 f5 19. a6 e5 20. a7
1. Nf3 f6 2. Nc3 a6 3. Ne5 d6 4. Nf7 Qd7 5. Nd5 e6 6. Nxc7 a5 7. e3 b5 8. Nxh8 a4 9. b4 a3 10. Qg4 g6 11. Qd4 Rc8 12. g3 Rc7 13. Bxa3 Ra7 14. Bd3 d5 15. a4 Bd6 16. Qb6 Rc7 17. Qc6 Rxc6 18. a5 f5 19. a6 e5 20. a7 - Oct 08 01:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 a6 … Rxc6 18. a5 f5 19. a6 e5
1. Nf3 f6 2. Nc3 a6 3. Ne5 d6 4. Nf7 Qd7 5. Nd5 e6 6. Nxc7 a5 7. e3 b5 8. Nxh8 a4 9. b4 a3 10. Qg4 g6 11. Qd4 Rc8 12. g3 Rc7 13. Bxa3 Ra7 14. Bd3 d5 15. a4 Bd6 16. Qb6 Rc7 17. Qc6 Rxc6 18. a5 f5 19. a6 e5 - Oct 08 01:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 a6 … 17. Qc6 Rxc6 18. a5 f5 19. a6
1. Nf3 f6 2. Nc3 a6 3. Ne5 d6 4. Nf7 Qd7 5. Nd5 e6 6. Nxc7 a5 7. e3 b5 8. Nxh8 a4 9. b4 a3 10. Qg4 g6 11. Qd4 Rc8 12. g3 Rc7 13. Bxa3 Ra7 14. Bd3 d5 15. a4 Bd6 16. Qb6 Rc7 17. Qc6 Rxc6 18. a5 f5 19. a6 - Oct 08 01:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 a6 … Rc7 17. Qc6 Rxc6 18. a5 f5
1. Nf3 f6 2. Nc3 a6 3. Ne5 d6 4. Nf7 Qd7 5. Nd5 e6 6. Nxc7 a5 7. e3 b5 8. Nxh8 a4 9. b4 a3 10. Qg4 g6 11. Qd4 Rc8 12. g3 Rc7 13. Bxa3 Ra7 14. Bd3 d5 15. a4 Bd6 16. Qb6 Rc7 17. Qc6 Rxc6 18. a5 f5 - Oct 08 01:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 a6 … 16. Qb6 Rc7 17. Qc6 Rxc6 18. a5
1. Nf3 f6 2. Nc3 a6 3. Ne5 d6 4. Nf7 Qd7 5. Nd5 e6 6. Nxc7 a5 7. e3 b5 8. Nxh8 a4 9. b4 a3 10. Qg4 g6 11. Qd4 Rc8 12. g3 Rc7 13. Bxa3 Ra7 14. Bd3 d5 15. a4 Bd6 16. Qb6 Rc7 17. Qc6 Rxc6 18. a5 - Oct 08 01:54 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nc3 a6 … Rc8 12. g3 Rc7 13. Bxa3 Re7
1. Nf3 f6 2. Nc3 a6 3. Ne5 d6 4. Nf7 Qd7 5. Nd5 e6 6. Nxc7 a5 7. e3 b5 8. Nxh8 a4 9. b4 a3 10. Qg4 g6 11. Qd4 Rc8 12. g3 Rc7 13. Bxa3 Re7