56.0M
positions
8.9M
practically solved
202.66T
engine nodes
1.6M
analyses
3,009
in queue
13
active workers
88
active cores
2.6M
nodes / sec
31.5
positions / min
131
proof number
3,717
disproof number
Root conquest: 0/20 first moves solved · 15.9% of tree positions solved · last 24h: 409,861 closures, 5.71T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 over 169 open obligations, of which 31 (18.3%) 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 6.2h (median of 140) · measured at 2026-09-18 07:00 UTC
Closures by source, last 24h (409861 of 409861 labelled): USER 99.9% (409436) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.1% (425) · last 7d (1577047 of 1577047): USER 97.4% (1535510) · FILL 0.4% (5611) · AUTO 2.0% (32114) · SOLVE 0.0% (0) · NONE 0.2% (3812). 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 g5 17. d3 Nb4 18. Rad1 (User) · 128.0M nodes · auranvesdranor-admin-835912-atomicdb
- 1. Nf3 f6 2. Nc3 d6 … Kf8 9. g3 d4 10. O-O d3 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. e4 d5 … 20. b3 Rb8 21. Be8 h5 22. Bg6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. e4 e6 … 21. d5 exd5 22. b4 Be7 23. a5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. Nc3 d6 … Kf8 9. g3 a5 10. d4 b6 (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 | 1072 | 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 | Torom 25.7% of the fleet | 1.47T | 10,192 |
| 2 | BManBJ 24.6% of the fleet | 1.40T | 10,776 |
| 3 | auranvesdranor 23.4% of the fleet | 1.34T | 10,123 |
| 4 | tenzink 11.2% of the fleet | 637.60B | 3,716 |
| 5 | randomchampgamer 10.6% of the fleet | 603.05B | 4,809 |
| 6 | MoNiKaMaDnEsS 4.5% of the fleet | 256.38B | 1,645 |
6 accounts · 5.71T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 39.3% of the fleet | 79.65T | 677,611 |
| 2 | tenzink 16.6% of the fleet | 33.73T | 287,724 |
| 3 | auranvesdranor 10.7% of the fleet | 21.76T | 155,693 |
| 4 | BManBJ 10.4% of the fleet | 21.14T | 142,868 |
| 5 | JackIV 3.9% of the fleet | 7.94T | 56,572 |
| 6 | randomchampgamer 3.4% of the fleet | 6.98T | 49,756 |
| 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 | 3.71T | 23,623 |
| 10 | ijh 1.8% of the fleet | 3.57T | 37,348 |
and 22 more.
32 accounts · 202.84T 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 18 07:49 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nc3 d6 … Kf8 9. g3 a6 10. Be8 Bxg3
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 d5 7. e3 Bd6 8. Bb5 Kf8 9. g3 a6 10. Be8 Bxg3 - Sep 18 07:49 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … Kg8 14. Bxg6 e5 15. Qe7 d4
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 d5 7. e3 Bd6 8. Bb5 Kf8 9. g3 a6 10. Be8 Bxg3 11. Qh5 g6 12. Qg4 h5 13. Qb4 Kg8 14. Bxg6 e5 15. Qe7 d4 - Sep 18 07:49 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 13. Qb4 Kg8 14. Bxg6 e5 15. Qe7
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 d5 7. e3 Bd6 8. Bb5 Kf8 9. g3 a6 10. Be8 Bxg3 11. Qh5 g6 12. Qg4 h5 13. Qb4 Kg8 14. Bxg6 e5 15. Qe7 - Sep 18 07:49 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … h5 13. Qb4 Kg8 14. Bxg6 e5
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 d5 7. e3 Bd6 8. Bb5 Kf8 9. g3 a6 10. Be8 Bxg3 11. Qh5 g6 12. Qg4 h5 13. Qb4 Kg8 14. Bxg6 e5 - Sep 18 07:49 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 12. Qg4 h5 13. Qb4 Kg8 14. Bxg6
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 d5 7. e3 Bd6 8. Bb5 Kf8 9. g3 a6 10. Be8 Bxg3 11. Qh5 g6 12. Qg4 h5 13. Qb4 Kg8 14. Bxg6 - Sep 18 07:49 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … g6 12. Qg4 h5 13. Qb4 Kg8
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 d5 7. e3 Bd6 8. Bb5 Kf8 9. g3 a6 10. Be8 Bxg3 11. Qh5 g6 12. Qg4 h5 13. Qb4 Kg8 - Sep 18 07:49 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 11. Qh5 g6 12. Qg4 h5 13. Qb4
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 d5 7. e3 Bd6 8. Bb5 Kf8 9. g3 a6 10. Be8 Bxg3 11. Qh5 g6 12. Qg4 h5 13. Qb4 - Sep 18 07:49 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … Bxg3 11. Qh5 g6 12. Qg4 h5
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 d5 7. e3 Bd6 8. Bb5 Kf8 9. g3 a6 10. Be8 Bxg3 11. Qh5 g6 12. Qg4 h5 - Sep 18 07:49 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 10. Be8 Bxg3 11. Qh5 g6 12. Qg4
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 d5 7. e3 Bd6 8. Bb5 Kf8 9. g3 a6 10. Be8 Bxg3 11. Qh5 g6 12. Qg4 - Sep 18 07:49 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … a6 10. Be8 Bxg3 11. Qh5 g6
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 d5 7. e3 Bd6 8. Bb5 Kf8 9. g3 a6 10. Be8 Bxg3 11. Qh5 g6 - Sep 18 07:49 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 9. g3 a6 10. Be8 Bxg3 11. Qh5
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 d5 7. e3 Bd6 8. Bb5 Kf8 9. g3 a6 10. Be8 Bxg3 11. Qh5 - Sep 18 07:49 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … e5 14. Qh6 Ke7 15. Qg7 Kd8
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 d5 7. e3 Bd6 8. Bb5 Kf8 9. g3 a6 10. Be8 Bxg3 11. d4 g6 12. Qg4 h5 13. Qf4 e5 14. Qh6 Ke7 15. Qg7 Kd8