56.6M
positions
9.1M
practically solved
205.07T
engine nodes
1.6M
analyses
5,983
in queue
14
active workers
87
active cores
30.7M
nodes / sec
24.6
positions / min
131
proof number
3,717
disproof number
Root conquest: 0/20 first moves solved · 16.0% of tree positions solved · last 24h: 372,664 closures, 5.41T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 over 167 open obligations, of which 31 (18.6%) 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 5.3h (median of 151) · measured at 2026-09-18 20:00 UTC
Closures by source, last 24h (372595 of 372596 labelled): USER 99.8% (371998) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.2% (597) · last 7d (1613261 of 1613328): USER 98.2% (1584493) · FILL 0.2% (3855) · AUTO 1.3% (21080) · SOLVE 0.0% (0) · NONE 0.2% (3833). 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 … Rb7 26. Bd6 Kf7 27. e5 Nc7 (User) · 128.0M nodes · auranvesdranor-admin-835912-atomicdb
- 1. Nh3 e6 2. e3 g6 … Rb7 26. Bd6 Kf7 27. e5 Ne7 (User) · 128.0M nodes · auranvesdranor-j-002-atomicdb
- 1. Nh3 e6 2. e3 g6 … Rb7 26. Bd6 Kf7 27. e5 Nb6 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 f6 2. e4 e6 … 22. h6 Ng6 23. h7 Nf4 24. exd5 (User) · 512.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 d6 … Be7 11. Be8 Kh8 12. c4 b6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
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 | 1100 | 2 | |
| g1h3 | unsolved | 801 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 434 | 2 | |
| e2e4 | unsolved | 417 | 2 | |
| b1c3 | unsolved | 91 | 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 23.7% of the fleet | 1.28T | 9,519 |
| 2 | auranvesdranor 22.9% of the fleet | 1.24T | 9,404 |
| 3 | Torom 22.3% of the fleet | 1.21T | 8,592 |
| 4 | randomchampgamer 11.6% of the fleet | 628.12B | 4,698 |
| 5 | tenzink 10.3% of the fleet | 557.49B | 3,784 |
| 6 | JackIV 4.6% of the fleet | 248.03B | 979 |
| 7 | MoNiKaMaDnEsS 3.3% of the fleet | 180.35B | 1,137 |
| 8 | quasa 1.2% of the fleet | 66.94B | 424 |
8 accounts · 5.41T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 38.8% of the fleet | 79.65T | 677,611 |
| 2 | tenzink 16.6% of the fleet | 34.01T | 289,409 |
| 3 | auranvesdranor 11.0% of the fleet | 22.53T | 161,606 |
| 4 | BManBJ 10.6% of the fleet | 21.80T | 147,615 |
| 5 | JackIV 4.0% of the fleet | 8.19T | 57,550 |
| 6 | randomchampgamer 3.6% of the fleet | 7.34T | 52,252 |
| 7 | RickEdinson 3.1% of the fleet | 6.32T | 41,667 |
| 8 | NeoArcturus 2.0% of the fleet | 4.09T | 16,751 |
| 9 | MoNiKaMaDnEsS 1.8% of the fleet | 3.79T | 23,983 |
| 10 | ijh 1.7% of the fleet | 3.57T | 37,348 |
and 22 more.
32 accounts · 205.30T 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 18 21:07 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nc3 d6 … Be7 11. Be8 b6 12. d5 Bf8
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 Kg8 8. Bb5 g6 9. d4 a5 10. O-O Be7 11. Be8 b6 12. d5 Bf8 - Sep 18 21:07 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … Be5 17. exf5 Re8 18. Qh8 Kf7
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 Kg8 8. Bb5 g6 9. d4 a5 10. O-O Be7 11. Be8 b6 12. d5 Bf8 13. Bxh6 f5 14. Bxg6 Bg7 15. Qh5 Bd4 16. Kh1 Be5 17. exf5 Re8 18. Qh8 Kf7 - Sep 18 21:07 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 16. Kh1 Be5 17. exf5 Re8 18. Qh8
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 Kg8 8. Bb5 g6 9. d4 a5 10. O-O Be7 11. Be8 b6 12. d5 Bf8 13. Bxh6 f5 14. Bxg6 Bg7 15. Qh5 Bd4 16. Kh1 Be5 17. exf5 Re8 18. Qh8 - Sep 18 21:07 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … Bd4 16. Kh1 Be5 17. exf5 Re8
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 Kg8 8. Bb5 g6 9. d4 a5 10. O-O Be7 11. Be8 b6 12. d5 Bf8 13. Bxh6 f5 14. Bxg6 Bg7 15. Qh5 Bd4 16. Kh1 Be5 17. exf5 Re8 - Sep 18 21:07 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 15. Qh5 Bd4 16. Kh1 Be5 17. exf5
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 Kg8 8. Bb5 g6 9. d4 a5 10. O-O Be7 11. Be8 b6 12. d5 Bf8 13. Bxh6 f5 14. Bxg6 Bg7 15. Qh5 Bd4 16. Kh1 Be5 17. exf5 - Sep 18 21:07 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … Bg7 15. Qh5 Bd4 16. Kh1 Be5
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 Kg8 8. Bb5 g6 9. d4 a5 10. O-O Be7 11. Be8 b6 12. d5 Bf8 13. Bxh6 f5 14. Bxg6 Bg7 15. Qh5 Bd4 16. Kh1 Be5 - Sep 18 21:07 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 14. Bxg6 Bg7 15. Qh5 Bd4 16. Kh1
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 Kg8 8. Bb5 g6 9. d4 a5 10. O-O Be7 11. Be8 b6 12. d5 Bf8 13. Bxh6 f5 14. Bxg6 Bg7 15. Qh5 Bd4 16. Kh1 - Sep 18 21:07 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … f5 14. Bxg6 Bg7 15. Qh5 Bd4
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 Kg8 8. Bb5 g6 9. d4 a5 10. O-O Be7 11. Be8 b6 12. d5 Bf8 13. Bxh6 f5 14. Bxg6 Bg7 15. Qh5 Bd4 - Sep 18 21:07 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 13. Bxh6 f5 14. Bxg6 Bg7 15. Qh5
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 Kg8 8. Bb5 g6 9. d4 a5 10. O-O Be7 11. Be8 b6 12. d5 Bf8 13. Bxh6 f5 14. Bxg6 Bg7 15. Qh5 - Sep 18 21:07 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … Bf8 13. Bxh6 f5 14. Bxg6 Bg7
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 Kg8 8. Bb5 g6 9. d4 a5 10. O-O Be7 11. Be8 b6 12. d5 Bf8 13. Bxh6 f5 14. Bxg6 Bg7 - Sep 18 21:07 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 12. d5 Bf8 13. Bxh6 f5 14. Bxg6
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 Kg8 8. Bb5 g6 9. d4 a5 10. O-O Be7 11. Be8 b6 12. d5 Bf8 13. Bxh6 f5 14. Bxg6 - Sep 18 21:07 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … b6 12. d5 Bf8 13. Bxh6 f5
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 Kg8 8. Bb5 g6 9. d4 a5 10. O-O Be7 11. Be8 b6 12. d5 Bf8 13. Bxh6 f5