55.3M
positions
8.7M
practically solved
200.49T
engine nodes
1.6M
analyses
1,429
in queue
15
active workers
104
active cores
33.1M
nodes / sec
41.2
positions / min
131
proof number
3,717
disproof number
Root conquest: 0/20 first moves solved · 15.8% of tree positions solved · last 24h: 352,017 closures, 4.91T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 75 over 168 open obligations, of which 30 (17.9%) 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 20.5h (median of 169) · measured at 2026-09-17 23:00 UTC
Closures by source, last 24h (352013 of 352013 labelled): USER 99.9% (351496) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.1% (517) · last 7d (1470876 of 1470876): USER 95.4% (1402535) · FILL 0.6% (8838) · AUTO 3.8% (55582) · SOLVE 0.0% (0) · NONE 0.3% (3921). 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 … 16. Bxa3 Nc5 17. Rab1 g5 18. Nxe6 (User) · 128.0M nodes · auranvesdranor-admin-835912-atomicdb
- 1. Nh3 e6 2. e3 g6 … 16. Bxa3 Nc5 17. Rab1 g5 18. Na8 (User) · 128.0M nodes · auranvesdranor-j-002-atomicdb
- 1. Nh3 e6 2. e3 g6 … 16. Bxa3 Nc5 17. Rab1 g5 18. f4 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Nb8 12. a3 b6 13. Nc3 Ra6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Nb8 12. a3 b6 13. Nc3 Na6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
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 | 1091 | 2 | |
| g1h3 | unsolved | 820 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| e2e4 | unsolved | 415 | 2 | |
| d2d4 | unsolved | 408 | 2 | |
| b1c3 | unsolved | 71 | 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 | auranvesdranor 32.4% of the fleet | 1.59T | 12,146 |
| 2 | BManBJ 27.8% of the fleet | 1.37T | 10,511 |
| 3 | tenzink 12.4% of the fleet | 610.84B | 3,241 |
| 4 | randomchampgamer 12.0% of the fleet | 587.59B | 4,672 |
| 5 | Torom 11.8% of the fleet | 578.67B | 3,719 |
| 6 | MoNiKaMaDnEsS 3.7% of the fleet | 179.55B | 1,066 |
6 accounts · 4.91T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 39.7% of the fleet | 79.65T | 677,611 |
| 2 | tenzink 16.7% of the fleet | 33.52T | 286,122 |
| 3 | auranvesdranor 10.7% of the fleet | 21.47T | 153,544 |
| 4 | BManBJ 10.3% of the fleet | 20.68T | 139,338 |
| 5 | JackIV 4.0% of the fleet | 7.94T | 56,572 |
| 6 | randomchampgamer 3.4% of the fleet | 6.78T | 48,098 |
| 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 | 3.63T | 23,044 |
| 10 | ijh 1.8% of the fleet | 3.57T | 37,348 |
and 22 more.
32 accounts · 200.70T 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 · 15 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 17 23:47 Solved: BLACK_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … 6. e4 Nh6 7. h3 Bc5 8. a3
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 d5 6. e4 Nh6 7. h3 Bc5 8. a3 - Sep 17 23:47 Solved: BLACK_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … 17. Kf3 Rf4 18. Ke2 Rf2 19. Kd1
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 d5 6. e4 Nh6 7. h3 Bc5 8. f3 Bf2 9. Ke2 Nf5 10. exf5 e4 11. fxe4 O-O-O 12. Kf3 Rhe8 13. Ba6 bxa6 14. Qg1 Bxg1 15. h4 Re3 16. Kg4 Re4 17. Kf3 Rf4 18. Ke2 Rf2 19. Kd1 - Sep 17 23:47 Solved: BLACK_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … Re4 17. Kf3 Rf4 18. Ke2 Rf2
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 d5 6. e4 Nh6 7. h3 Bc5 8. f3 Bf2 9. Ke2 Nf5 10. exf5 e4 11. fxe4 O-O-O 12. Kf3 Rhe8 13. Ba6 bxa6 14. Qg1 Bxg1 15. h4 Re3 16. Kg4 Re4 17. Kf3 Rf4 18. Ke2 Rf2 - Sep 17 23:47 Solved: BLACK_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … 16. Kg4 Re4 17. Kf3 Rf4 18. Ke2
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 d5 6. e4 Nh6 7. h3 Bc5 8. f3 Bf2 9. Ke2 Nf5 10. exf5 e4 11. fxe4 O-O-O 12. Kf3 Rhe8 13. Ba6 bxa6 14. Qg1 Bxg1 15. h4 Re3 16. Kg4 Re4 17. Kf3 Rf4 18. Ke2 - Sep 17 23:47 Solved: BLACK_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … Re3 16. Kg4 Re4 17. Kf3 Rf4
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 d5 6. e4 Nh6 7. h3 Bc5 8. f3 Bf2 9. Ke2 Nf5 10. exf5 e4 11. fxe4 O-O-O 12. Kf3 Rhe8 13. Ba6 bxa6 14. Qg1 Bxg1 15. h4 Re3 16. Kg4 Re4 17. Kf3 Rf4 - Sep 17 23:47 Solved: BLACK_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … 15. h4 Re3 16. Kg4 Re4 17. Kf3
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 d5 6. e4 Nh6 7. h3 Bc5 8. f3 Bf2 9. Ke2 Nf5 10. exf5 e4 11. fxe4 O-O-O 12. Kf3 Rhe8 13. Ba6 bxa6 14. Qg1 Bxg1 15. h4 Re3 16. Kg4 Re4 17. Kf3 - Sep 17 23:47 Solved: BLACK_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … Bxg1 15. h4 Re3 16. Kg4 Re4
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 d5 6. e4 Nh6 7. h3 Bc5 8. f3 Bf2 9. Ke2 Nf5 10. exf5 e4 11. fxe4 O-O-O 12. Kf3 Rhe8 13. Ba6 bxa6 14. Qg1 Bxg1 15. h4 Re3 16. Kg4 Re4 - Sep 17 23:47 Solved: BLACK_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … 14. Qg1 Bxg1 15. h4 Re3 16. Kg4
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 d5 6. e4 Nh6 7. h3 Bc5 8. f3 Bf2 9. Ke2 Nf5 10. exf5 e4 11. fxe4 O-O-O 12. Kf3 Rhe8 13. Ba6 bxa6 14. Qg1 Bxg1 15. h4 Re3 16. Kg4 - Sep 17 23:47 Solved: BLACK_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … bxa6 14. Qg1 Bxg1 15. h4 Re3
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 d5 6. e4 Nh6 7. h3 Bc5 8. f3 Bf2 9. Ke2 Nf5 10. exf5 e4 11. fxe4 O-O-O 12. Kf3 Rhe8 13. Ba6 bxa6 14. Qg1 Bxg1 15. h4 Re3 - Sep 17 23:47 Solved: BLACK_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … 13. Ba6 bxa6 14. Qg1 Bxg1 15. h4
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 d5 6. e4 Nh6 7. h3 Bc5 8. f3 Bf2 9. Ke2 Nf5 10. exf5 e4 11. fxe4 O-O-O 12. Kf3 Rhe8 13. Ba6 bxa6 14. Qg1 Bxg1 15. h4 - Sep 17 23:47 Solved: BLACK_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … Rhe8 13. Ba6 bxa6 14. Qg1 Bxg1
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 d5 6. e4 Nh6 7. h3 Bc5 8. f3 Bf2 9. Ke2 Nf5 10. exf5 e4 11. fxe4 O-O-O 12. Kf3 Rhe8 13. Ba6 bxa6 14. Qg1 Bxg1 - Sep 17 23:47 Solved: BLACK_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … 12. Kf3 Rhe8 13. Ba6 bxa6 14. Qg1
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 d5 6. e4 Nh6 7. h3 Bc5 8. f3 Bf2 9. Ke2 Nf5 10. exf5 e4 11. fxe4 O-O-O 12. Kf3 Rhe8 13. Ba6 bxa6 14. Qg1