73.2M
positions
13.6M
practically solved
261.70T
engine nodes
2.0M
analyses
9,216
in queue
10
active workers
56
active cores
8.0M
nodes / sec
19.6
positions / min
82
proof number
3,797
disproof number
Root conquest: 0/20 first moves solved · 18.6% of tree positions solved · last 24h: 359,160 closures, 4.26T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 73 over 202 open obligations, of which 36 (17.8%) 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 6.5h (median of 115) · measured at 2026-10-02 22:00 UTC
Closures by source, last 24h (359115 of 359115 labelled): USER 99.7% (358079) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.3% (1036) · last 7d (2839297 of 2839342): USER 98.6% (2799573) · FILL 0.3% (8452) · AUTO 0.9% (26873) · SOLVE 0.0% (0) · NONE 0.2% (4399). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nh3 f5 2. e3 e6 … 12. Bb2 e5 13. c4 g6 14. c5 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nh3 h6 2. d4 e6 … 10. Bxb5 a5 11. Nb5 Qe8 12. b3 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. Ne5 fxe5 … Be4 24. f4 Bc2 25. d6 Nf7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nh3 h6 2. d4 e6 … 10. Bxb5 a5 11. Nb5 Qe8 12. f3 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Na3 e5 2. Nf3 Qg5 … Be7 8. axb5 d5 9. Ra6 Kd8 (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 | 1101 | 2 | |
| g1h3 | unsolved | 725 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 439 | 2 | |
| e2e4 | unsolved | 417 | 2 | |
| b1c3 | unsolved | 110 | 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 35.3% of the fleet | 1.51T | 11,480 |
| 2 | auranvesdranor 21.6% of the fleet | 920.35B | 7,045 |
| 3 | tenzink 15.0% of the fleet | 640.23B | 4,769 |
| 4 | randomchampgamer 14.9% of the fleet | 634.44B | 5,085 |
| 5 | RickEdinson 10.4% of the fleet | 442.93B | 3,257 |
| 6 | MoNiKaMaDnEsS 2.5% of the fleet | 105.86B | 829 |
| 7 | quasa 0.2% of the fleet | 7.94B | 62 |
| 8 | soothdest 0.1% of the fleet | 5.48B | 51 |
8 accounts · 4.26T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 34.5% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.0% of the fleet | 39.39T | 326,191 |
| 3 | BManBJ 13.0% of the fleet | 34.07T | 239,840 |
| 4 | auranvesdranor 12.0% of the fleet | 31.36T | 227,678 |
| 5 | randomchampgamer 4.7% of the fleet | 12.22T | 90,965 |
| 6 | JackIV 3.8% of the fleet | 10.06T | 67,859 |
| 7 | RickEdinson 3.0% of the fleet | 7.96T | 53,348 |
| 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 · 261.76T 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 22:31 Solved: WHITE_WIN via MINIMAXview
1. Na3 e5 2. Nf3 Qg5 … Be7 8. Bd3 b5 9. a4 Kd7
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 Nh6 6. h3 Rd8 7. e3 Be7 8. Bd3 b5 9. a4 Kd7 - Oct 02 22:31 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … a5 16. Qa4 Kc7 17. Qc6 Kd8
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 Nh6 6. h3 Rd8 7. e3 Be7 8. Bd3 b5 9. a4 Kd7 10. axb5 Rc8 11. Ra6 Kd8 12. Rc6 Rxc6 13. Bxh7 f5 14. c3 Bh4 15. g3 a5 16. Qa4 Kc7 17. Qc6 Kd8 - Oct 02 22:31 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … 15. g3 a5 16. Qa4 Kc7 17. Qc6
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 Nh6 6. h3 Rd8 7. e3 Be7 8. Bd3 b5 9. a4 Kd7 10. axb5 Rc8 11. Ra6 Kd8 12. Rc6 Rxc6 13. Bxh7 f5 14. c3 Bh4 15. g3 a5 16. Qa4 Kc7 17. Qc6 - Oct 02 22:31 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … Bh4 15. g3 a5 16. Qa4 Kc7
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 Nh6 6. h3 Rd8 7. e3 Be7 8. Bd3 b5 9. a4 Kd7 10. axb5 Rc8 11. Ra6 Kd8 12. Rc6 Rxc6 13. Bxh7 f5 14. c3 Bh4 15. g3 a5 16. Qa4 Kc7 - Oct 02 22:31 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … 14. c3 Bh4 15. g3 a5 16. Qa4
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 Nh6 6. h3 Rd8 7. e3 Be7 8. Bd3 b5 9. a4 Kd7 10. axb5 Rc8 11. Ra6 Kd8 12. Rc6 Rxc6 13. Bxh7 f5 14. c3 Bh4 15. g3 a5 16. Qa4 - Oct 02 22:31 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … f5 14. c3 Bh4 15. g3 a5
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 Nh6 6. h3 Rd8 7. e3 Be7 8. Bd3 b5 9. a4 Kd7 10. axb5 Rc8 11. Ra6 Kd8 12. Rc6 Rxc6 13. Bxh7 f5 14. c3 Bh4 15. g3 a5 - Oct 02 22:31 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … 13. Bxh7 f5 14. c3 Bh4 15. g3
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 Nh6 6. h3 Rd8 7. e3 Be7 8. Bd3 b5 9. a4 Kd7 10. axb5 Rc8 11. Ra6 Kd8 12. Rc6 Rxc6 13. Bxh7 f5 14. c3 Bh4 15. g3 - Oct 02 22:31 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … Rxc6 13. Bxh7 f5 14. c3 Bh4
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 Nh6 6. h3 Rd8 7. e3 Be7 8. Bd3 b5 9. a4 Kd7 10. axb5 Rc8 11. Ra6 Kd8 12. Rc6 Rxc6 13. Bxh7 f5 14. c3 Bh4 - Oct 02 22:31 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … 12. Rc6 Rxc6 13. Bxh7 f5 14. c3
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 Nh6 6. h3 Rd8 7. e3 Be7 8. Bd3 b5 9. a4 Kd7 10. axb5 Rc8 11. Ra6 Kd8 12. Rc6 Rxc6 13. Bxh7 f5 14. c3 - Oct 02 22:31 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … Kd8 12. Rc6 Rxc6 13. Bxh7 f5
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 Nh6 6. h3 Rd8 7. e3 Be7 8. Bd3 b5 9. a4 Kd7 10. axb5 Rc8 11. Ra6 Kd8 12. Rc6 Rxc6 13. Bxh7 f5 - Oct 02 22:31 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … 11. Ra6 Kd8 12. Rc6 Rxc6 13. Bxh7
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 Nh6 6. h3 Rd8 7. e3 Be7 8. Bd3 b5 9. a4 Kd7 10. axb5 Rc8 11. Ra6 Kd8 12. Rc6 Rxc6 13. Bxh7 - Oct 02 22:31 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … Rc8 11. Ra6 Kd8 12. Rc6 Rxc6
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 Nh6 6. h3 Rd8 7. e3 Be7 8. Bd3 b5 9. a4 Kd7 10. axb5 Rc8 11. Ra6 Kd8 12. Rc6 Rxc6