72.8M
positions
13.5M
practically solved
260.37T
engine nodes
2.0M
analyses
8,657
in queue
11
active workers
60
active cores
15.8M
nodes / sec
18.0
positions / min
82
proof number
3,797
disproof number
Root conquest: 0/20 first moves solved · 18.6% of tree positions solved · last 24h: 383,176 closures, 4.45T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 78 over 202 open obligations, of which 33 (16.3%) 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 27.5m (median of 19) · measured at 2026-10-02 14:00 UTC
Closures by source, last 24h (383161 of 383161 labelled): USER 99.7% (382167) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.3% (994) · last 7d (3064639 of 3064654): USER 98.5% (3019497) · FILL 0.3% (8795) · AUTO 1.0% (32065) · SOLVE 0.0% (0) · NONE 0.1% (4282). 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 … h4 17. a4 d4 18. Bb5 dxc3 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nh3 h6 2. d4 e6 … Qb5 12. Qd3 Qa4 13. b3 Qc4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nh3 h6 2. d4 e6 … Qb5 12. Qd3 Qa4 13. b3 Qd4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nh3 e6 2. e3 g6 … h4 17. a4 d4 18. Bb5 c5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. e4 e6 … Ka8 23. a3 e5 24. c5 d5 (User) · 128.0M nodes · BManBJ-Laptop-Blake-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 | 1101 | 2 | |
| g1h3 | unsolved | 725 | 2 | |
| e2e3 | unsolved | 488 | 3 | |
| d2d4 | unsolved | 439 | 2 | |
| e2e4 | unsolved | 417 | 2 | |
| b1c3 | unsolved | 120 | 2 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b2b4 | unsolved | 0 | 3 | |
| b1a3 | unsolved | 0 | 3 | |
| h2h3 | unsolved | -97 | 2 | |
| d2d3 | unsolved | -98 | 2 | |
| a2a3 | unsolved | -100 | 2 | |
| f2f3 | unsolved | -117 | 3 | |
| b2b3 | unsolved | -144 | 1 | |
| f2f4 | unsolved | -305 | 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 33.6% of the fleet | 1.50T | 11,755 |
| 2 | auranvesdranor 23.0% of the fleet | 1.03T | 7,898 |
| 3 | tenzink 14.2% of the fleet | 633.54B | 4,641 |
| 4 | randomchampgamer 14.1% of the fleet | 628.63B | 4,873 |
| 5 | RickEdinson 9.9% of the fleet | 441.33B | 3,311 |
| 6 | MoNiKaMaDnEsS 4.8% of the fleet | 213.95B | 1,677 |
| 7 | quasa 0.3% of the fleet | 11.52B | 90 |
| 8 | soothdest 0.1% of the fleet | 3.01B | 31 |
8 accounts · 4.45T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 34.7% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.0% of the fleet | 39.18T | 324,653 |
| 3 | BManBJ 12.9% of the fleet | 33.58T | 236,294 |
| 4 | auranvesdranor 12.0% of the fleet | 31.13T | 225,975 |
| 5 | randomchampgamer 4.6% of the fleet | 12.02T | 89,354 |
| 6 | JackIV 3.9% of the fleet | 10.06T | 67,859 |
| 7 | RickEdinson 3.0% of the fleet | 7.82T | 52,399 |
| 8 | gannet 2.8% of the fleet | 7.24T | 46,848 |
| 9 | MoNiKaMaDnEsS 2.0% of the fleet | 5.17T | 34,516 |
| 10 | NeoArcturus 1.6% of the fleet | 4.09T | 16,758 |
and 25 more.
35 accounts · 260.48T 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
- Is Nh3 h6 e3 e6 Nc3 a draw?1. Nh3 e6 2. e3 h6 3. Nc3proposed by soothdest · 4 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
Showing the 6 most voted of 21 proposals · see every proposal
Milestones
- Oct 02 14:49 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … Kf8 12. Bb4 Kg8 13. Bd6 Bb6
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 d5 7. e3 Bd6 8. Bc4 Rd8 9. d4 Bc7 10. Ba6 b5 11. Bd2 Kf8 12. Bb4 Kg8 13. Bd6 Bb6 - Oct 02 14:49 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … h5 23. Bxe7 e4 24. Qf8 Kh7
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 d5 7. e3 Bd6 8. Bc4 Rd8 9. d4 Bc7 10. Ba6 b5 11. Bd2 Kf8 12. Bb4 Kg8 13. Bd6 Ba5 14. Bxb5 g6 15. Qd3 Kh8 16. Bf8 Kg8 17. Qa3 Rd7 18. Bd6 Rb7 19. Qc5 Rd7 20. Bc7 Re7 21. Bd8 e5 22. Qa3 h5 23. Bxe7 e4 24. Qf8 Kh7 - Oct 02 14:49 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 22. Qa3 h5 23. Bxe7 e4 24. Qf8
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 d5 7. e3 Bd6 8. Bc4 Rd8 9. d4 Bc7 10. Ba6 b5 11. Bd2 Kf8 12. Bb4 Kg8 13. Bd6 Ba5 14. Bxb5 g6 15. Qd3 Kh8 16. Bf8 Kg8 17. Qa3 Rd7 18. Bd6 Rb7 19. Qc5 Rd7 20. Bc7 Re7 21. Bd8 e5 22. Qa3 h5 23. Bxe7 e4 24. Qf8 - Oct 02 14:49 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … e5 22. Qa3 h5 23. Bxe7 e4
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 d5 7. e3 Bd6 8. Bc4 Rd8 9. d4 Bc7 10. Ba6 b5 11. Bd2 Kf8 12. Bb4 Kg8 13. Bd6 Ba5 14. Bxb5 g6 15. Qd3 Kh8 16. Bf8 Kg8 17. Qa3 Rd7 18. Bd6 Rb7 19. Qc5 Rd7 20. Bc7 Re7 21. Bd8 e5 22. Qa3 h5 23. Bxe7 e4 - Oct 02 14:49 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 21. Bd8 e5 22. Qa3 h5 23. Bxe7
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 d5 7. e3 Bd6 8. Bc4 Rd8 9. d4 Bc7 10. Ba6 b5 11. Bd2 Kf8 12. Bb4 Kg8 13. Bd6 Ba5 14. Bxb5 g6 15. Qd3 Kh8 16. Bf8 Kg8 17. Qa3 Rd7 18. Bd6 Rb7 19. Qc5 Rd7 20. Bc7 Re7 21. Bd8 e5 22. Qa3 h5 23. Bxe7 - Oct 02 14:49 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … Re7 21. Bd8 e5 22. Qa3 h5
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 d5 7. e3 Bd6 8. Bc4 Rd8 9. d4 Bc7 10. Ba6 b5 11. Bd2 Kf8 12. Bb4 Kg8 13. Bd6 Ba5 14. Bxb5 g6 15. Qd3 Kh8 16. Bf8 Kg8 17. Qa3 Rd7 18. Bd6 Rb7 19. Qc5 Rd7 20. Bc7 Re7 21. Bd8 e5 22. Qa3 h5 - Oct 02 14:49 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 20. Bc7 Re7 21. Bd8 e5 22. Qa3
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 d5 7. e3 Bd6 8. Bc4 Rd8 9. d4 Bc7 10. Ba6 b5 11. Bd2 Kf8 12. Bb4 Kg8 13. Bd6 Ba5 14. Bxb5 g6 15. Qd3 Kh8 16. Bf8 Kg8 17. Qa3 Rd7 18. Bd6 Rb7 19. Qc5 Rd7 20. Bc7 Re7 21. Bd8 e5 22. Qa3 - Oct 02 14:49 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … Rd7 20. Bc7 Re7 21. Bd8 e5
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 d5 7. e3 Bd6 8. Bc4 Rd8 9. d4 Bc7 10. Ba6 b5 11. Bd2 Kf8 12. Bb4 Kg8 13. Bd6 Ba5 14. Bxb5 g6 15. Qd3 Kh8 16. Bf8 Kg8 17. Qa3 Rd7 18. Bd6 Rb7 19. Qc5 Rd7 20. Bc7 Re7 21. Bd8 e5 - Oct 02 14:49 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 19. Qc5 Rd7 20. Bc7 Re7 21. Bd8
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 d5 7. e3 Bd6 8. Bc4 Rd8 9. d4 Bc7 10. Ba6 b5 11. Bd2 Kf8 12. Bb4 Kg8 13. Bd6 Ba5 14. Bxb5 g6 15. Qd3 Kh8 16. Bf8 Kg8 17. Qa3 Rd7 18. Bd6 Rb7 19. Qc5 Rd7 20. Bc7 Re7 21. Bd8 - Oct 02 14:49 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … Rb7 19. Qc5 Rd7 20. Bc7 Re7
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 d5 7. e3 Bd6 8. Bc4 Rd8 9. d4 Bc7 10. Ba6 b5 11. Bd2 Kf8 12. Bb4 Kg8 13. Bd6 Ba5 14. Bxb5 g6 15. Qd3 Kh8 16. Bf8 Kg8 17. Qa3 Rd7 18. Bd6 Rb7 19. Qc5 Rd7 20. Bc7 Re7 - Oct 02 14:49 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 18. Bd6 Rb7 19. Qc5 Rd7 20. Bc7
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 d5 7. e3 Bd6 8. Bc4 Rd8 9. d4 Bc7 10. Ba6 b5 11. Bd2 Kf8 12. Bb4 Kg8 13. Bd6 Ba5 14. Bxb5 g6 15. Qd3 Kh8 16. Bf8 Kg8 17. Qa3 Rd7 18. Bd6 Rb7 19. Qc5 Rd7 20. Bc7 - Oct 02 14:49 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … Rd7 18. Bd6 Rb7 19. Qc5 Rd7
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 d5 7. e3 Bd6 8. Bc4 Rd8 9. d4 Bc7 10. Ba6 b5 11. Bd2 Kf8 12. Bb4 Kg8 13. Bd6 Ba5 14. Bxb5 g6 15. Qd3 Kh8 16. Bf8 Kg8 17. Qa3 Rd7 18. Bd6 Rb7 19. Qc5 Rd7