59.5M
positions
10.0M
practically solved
214.36T
engine nodes
1.7M
analyses
5,866
in queue
12
active workers
84
active cores
22.0M
nodes / sec
30.4
positions / min
131
proof number
3,777
disproof number
Root conquest: 0/20 first moves solved · 16.8% of tree positions solved · last 24h: 492,022 closures, 5.55T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 78 over 168 open obligations, of which 28 (16.7%) 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 3.0h (median of 186) · measured at 2026-09-20 08:00 UTC
Closures by source, last 24h (491973 of 491973 labelled): USER 99.9% (491560) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.1% (413) · last 7d (2300184 of 2300233): USER 99.3% (2283237) · FILL 0.1% (2903) · AUTO 0.4% (10303) · SOLVE 0.0% (0) · NONE 0.2% (3741). 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 … 8. Qf4 d6 9. Qh4 Nf6 10. Ba6 (User) · 512.0M nodes · auranvesdranor-j-002-atomicdb
- 1. Nh3 e6 2. e3 g6 … Na6 10. f3 Nb4 11. Nh7 Kd8 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Be6 15. O-O Bc4 16. Re1 Re8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Be6 15. O-O Bc4 16. Re1 Kh7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … Be6 15. O-O Bc4 16. Re1 Rd8 (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 | 1073 | 2 | |
| g1h3 | unsolved | 717 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 435 | 2 | |
| e2e4 | unsolved | 417 | 2 | |
| b1c3 | unsolved | 72 | 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 27.7% of the fleet | 1.54T | 11,351 |
| 2 | auranvesdranor 22.5% of the fleet | 1.25T | 9,596 |
| 3 | JackIV 18.3% of the fleet | 1.01T | 4,633 |
| 4 | tenzink 10.9% of the fleet | 603.59B | 4,167 |
| 5 | randomchampgamer 9.3% of the fleet | 515.83B | 4,178 |
| 6 | Torom 8.4% of the fleet | 464.11B | 3,174 |
| 7 | MoNiKaMaDnEsS 2.2% of the fleet | 120.33B | 889 |
| 8 | quasa 0.7% of the fleet | 37.52B | 298 |
| 9 | soothdest 0.2% of the fleet | 10.29B | 79 |
| 10 | NeoArcturus <0.1% of the fleet | 640.0M | 5 |
10 accounts · 5.55T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 37.2% of the fleet | 79.65T | 677,611 |
| 2 | tenzink 16.3% of the fleet | 34.90T | 295,507 |
| 3 | auranvesdranor 11.4% of the fleet | 24.44T | 176,172 |
| 4 | BManBJ 11.2% of the fleet | 24.03T | 164,105 |
| 5 | JackIV 4.5% of the fleet | 9.67T | 65,253 |
| 6 | randomchampgamer 3.8% of the fleet | 8.09T | 58,355 |
| 7 | RickEdinson 2.9% of the fleet | 6.32T | 41,667 |
| 8 | NeoArcturus 1.9% of the fleet | 4.09T | 16,756 |
| 9 | MoNiKaMaDnEsS 1.8% of the fleet | 3.96T | 25,266 |
| 10 | ijh 1.7% of the fleet | 3.57T | 37,348 |
and 22 more.
32 accounts · 214.38T 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 20 08:15 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … Be6 15. O-O Bc4 16. Re1 Kf7
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 f4 8. Nc3 Nf6 9. Nd8 Bg4 10. Qd2 g6 11. Nd5 Nxe4 12. Nxb7 Bh6 13. Qa5 O-O 14. f3 Be6 15. O-O Bc4 16. Re1 Kf7 - Sep 20 08:15 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Kf7 17. Qd5 Kg7 18. Qg8 Kf6
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 f4 8. Nc3 Nf6 9. Nd8 Bg4 10. Qd2 g6 11. Nd5 Nxe4 12. Nxb7 Bh6 13. Qa5 O-O 14. f3 Be6 15. O-O Bc4 16. Re1 Kf7 17. Qd5 Kg7 18. Qg8 Kf6 - Sep 20 08:15 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 16. Re1 Kf7 17. Qd5 Kg7 18. Qg8
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 f4 8. Nc3 Nf6 9. Nd8 Bg4 10. Qd2 g6 11. Nd5 Nxe4 12. Nxb7 Bh6 13. Qa5 O-O 14. f3 Be6 15. O-O Bc4 16. Re1 Kf7 17. Qd5 Kg7 18. Qg8 - Sep 20 08:15 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Bc4 16. Re1 Kf7 17. Qd5 Kg7
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 f4 8. Nc3 Nf6 9. Nd8 Bg4 10. Qd2 g6 11. Nd5 Nxe4 12. Nxb7 Bh6 13. Qa5 O-O 14. f3 Be6 15. O-O Bc4 16. Re1 Kf7 17. Qd5 Kg7 - Sep 20 08:15 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 15. O-O Bc4 16. Re1 Kf7 17. Qd5
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 f4 8. Nc3 Nf6 9. Nd8 Bg4 10. Qd2 g6 11. Nd5 Nxe4 12. Nxb7 Bh6 13. Qa5 O-O 14. f3 Be6 15. O-O Bc4 16. Re1 Kf7 17. Qd5 - Sep 20 08:15 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Bc4 16. Re1 Kf7 17. Qe5 Kg8
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 f4 8. Nc3 Nf6 9. Nd8 Bg4 10. Qd2 g6 11. Nd5 Nxe4 12. Nxb7 Bh6 13. Qa5 O-O 14. f3 Be6 15. O-O Bc4 16. Re1 Kf7 17. Qe5 Kg8 - Sep 20 08:15 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 15. O-O Bc4 16. Re1 Kf7 17. Qe5
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 f4 8. Nc3 Nf6 9. Nd8 Bg4 10. Qd2 g6 11. Nd5 Nxe4 12. Nxb7 Bh6 13. Qa5 O-O 14. f3 Be6 15. O-O Bc4 16. Re1 Kf7 17. Qe5 - Sep 20 08:15 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Bc4 16. Re1 Kf7 17. Qd8 Rxd8
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 f4 8. Nc3 Nf6 9. Nd8 Bg4 10. Qd2 g6 11. Nd5 Nxe4 12. Nxb7 Bh6 13. Qa5 O-O 14. f3 Be6 15. O-O Bc4 16. Re1 Kf7 17. Qd8 Rxd8 - Sep 20 08:15 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 15. O-O Bc4 16. Re1 Kf7 17. Qd8
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 f4 8. Nc3 Nf6 9. Nd8 Bg4 10. Qd2 g6 11. Nd5 Nxe4 12. Nxb7 Bh6 13. Qa5 O-O 14. f3 Be6 15. O-O Bc4 16. Re1 Kf7 17. Qd8 - Sep 20 08:15 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Bc4 16. Re1 Kf7 17. Qf5 gxf5
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 f4 8. Nc3 Nf6 9. Nd8 Bg4 10. Qd2 g6 11. Nd5 Nxe4 12. Nxb7 Bh6 13. Qa5 O-O 14. f3 Be6 15. O-O Bc4 16. Re1 Kf7 17. Qf5 gxf5 - Sep 20 08:15 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 15. O-O Bc4 16. Re1 Kf7 17. Qf5
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 f4 8. Nc3 Nf6 9. Nd8 Bg4 10. Qd2 g6 11. Nd5 Nxe4 12. Nxb7 Bh6 13. Qa5 O-O 14. f3 Be6 15. O-O Bc4 16. Re1 Kf7 17. Qf5 - Sep 20 08:15 Solved: BLACK_WIN via MINIMAXview
1. Nh3 e6 2. Nc3 h6 … 6. Nf4 h5 7. c3 b5 8. Ke2
1. Nh3 e6 2. Nc3 h6 3. e3 Ne7 4. Nb5 a6 5. Nxc7 Nd5 6. Nf4 h5 7. c3 b5 8. Ke2