68.9M
positions
12.5M
practically solved
247.94T
engine nodes
1.9M
analyses
4,558
in queue
17
active workers
120
active cores
23.4M
nodes / sec
33.5
positions / min
57
proof number
3,808
disproof number
Root conquest: 0/20 first moves solved · 18.1% of tree positions solved · last 24h: 390,290 closures, 6.97T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 81 over 200 open obligations, of which 32 (16.0%) 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 1.9m (median of 116) · measured at 2026-09-30 11:00 UTC
Closures by source, last 24h (390284 of 390287 labelled): USER 99.9% (390047) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.1% (237) · last 7d (2142474 of 2142477): USER 98.0% (2098849) · FILL 0.4% (8795) · AUTO 1.5% (32065) · SOLVE 0.0% (0) · NONE 0.1% (2765). 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 … a5 20. Be5 Nd5 21. a3 Ne1 (User) · 128.0M nodes · auranvesdranor-admin-835912-atomicdb
- 1. Nh3 e6 2. e3 g6 … a5 20. Be5 Nd5 21. a3 Na1 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … f4 11. h3 Ne8 12. Nc3 Nc7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … f4 11. h3 Ne8 12. Nc3 Rd8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … f4 11. h3 Ne8 12. Nc3 Rb8 (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 | 1003 | 2 | |
| g1h3 | unsolved | 821 | 2 | |
| e2e3 | unsolved | 453 | 3 | |
| d2d4 | unsolved | 437 | 2 | |
| e2e4 | unsolved | 407 | 2 | |
| b1c3 | unsolved | 142 | 2 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b2b4 | unsolved | 0 | 3 | |
| b1a3 | unsolved | 0 | 3 | |
| h2h3 | unsolved | -98 | 2 | |
| a2a3 | unsolved | -103 | 2 | |
| d2d3 | unsolved | -116 | 2 | |
| f2f3 | unsolved | -117 | 3 | |
| b2b3 | unsolved | -169 | 1 | |
| f2f4 | unsolved | -302 | 3 | |
| h2h4 | unsolved | -500 | 2 | |
| a2a4 | unsolved | -510 | 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 | gannet 40.2% of the fleet | 2.80T | 21,324 |
| 2 | BManBJ 21.1% of the fleet | 1.47T | 11,282 |
| 3 | auranvesdranor 14.6% of the fleet | 1.01T | 7,748 |
| 4 | tenzink 8.8% of the fleet | 614.08B | 4,432 |
| 5 | randomchampgamer 8.4% of the fleet | 588.21B | 4,707 |
| 6 | RickEdinson 3.6% of the fleet | 250.28B | 1,731 |
| 7 | MoNiKaMaDnEsS 3.3% of the fleet | 227.56B | 1,709 |
| 8 | soothdest <0.1% of the fleet | 1.31B | 21 |
8 accounts · 6.97T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 36.4% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.3% of the fleet | 37.85T | 315,048 |
| 3 | BManBJ 12.3% of the fleet | 30.41T | 211,595 |
| 4 | auranvesdranor 11.7% of the fleet | 28.91T | 209,037 |
| 5 | randomchampgamer 4.3% of the fleet | 10.68T | 78,768 |
| 6 | JackIV 4.1% of the fleet | 10.06T | 67,859 |
| 7 | RickEdinson 2.8% of the fleet | 6.96T | 46,195 |
| 8 | MoNiKaMaDnEsS 1.8% of the fleet | 4.52T | 29,480 |
| 9 | gannet 1.8% of the fleet | 4.46T | 25,529 |
| 10 | NeoArcturus 1.6% of the fleet | 4.09T | 16,758 |
and 25 more.
35 accounts · 248.02T 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 21 proposals · see every proposal
Milestones
- Sep 30 11:24 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nc3 g6 … a5 11. h3 Bd6 12. e4 Rb8
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kd8 9. d4 Rc8 10. Qe2 a5 11. h3 Bd6 12. e4 Rb8 - Sep 30 11:24 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … b5 16. Qe4 e5 17. Qc6 exf4
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kd8 9. d4 Rc8 10. Qe2 a5 11. h3 Ra8 12. e4 Bd6 13. exd5 Rc8 14. Bf4 Rc6 15. Bxc6 b5 16. Qe4 e5 17. Qc6 exf4 - Sep 30 11:24 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 15. Bxc6 b5 16. Qe4 e5 17. Qc6
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kd8 9. d4 Rc8 10. Qe2 a5 11. h3 Ra8 12. e4 Bd6 13. exd5 Rc8 14. Bf4 Rc6 15. Bxc6 b5 16. Qe4 e5 17. Qc6 - Sep 30 11:24 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … Rc6 15. Bxc6 b5 16. Qe4 e5
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kd8 9. d4 Rc8 10. Qe2 a5 11. h3 Ra8 12. e4 Bd6 13. exd5 Rc8 14. Bf4 Rc6 15. Bxc6 b5 16. Qe4 e5 - Sep 30 11:24 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 14. Bf4 Rc6 15. Bxc6 b5 16. Qe4
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kd8 9. d4 Rc8 10. Qe2 a5 11. h3 Ra8 12. e4 Bd6 13. exd5 Rc8 14. Bf4 Rc6 15. Bxc6 b5 16. Qe4 - Sep 30 11:24 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … Rc8 14. Bf4 Rc6 15. Bxc6 b5
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kd8 9. d4 Rc8 10. Qe2 a5 11. h3 Ra8 12. e4 Bd6 13. exd5 Rc8 14. Bf4 Rc6 15. Bxc6 b5 - Sep 30 11:24 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 11. h3 Bd6 12. e4 Rb8 13. exd5
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kd8 9. d4 Rc8 10. Qe2 a5 11. h3 Bd6 12. e4 Rb8 13. exd5 - Sep 30 11:23 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … f4 11. h3 Ne8 12. Nc3 d5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Kf8 10. Bxh6 f4 11. h3 Ne8 12. Nc3 d5 - Sep 30 11:23 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Kh7 18. Qe7 Kh6 19. Qg7 Kg5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Kf8 10. Bxh6 f4 11. h3 Ne8 12. Nc3 d5 13. exd5 Nf6 14. Qe2 e6 15. Qb5 Kg8 16. Qb4 Ne4 17. Nxe4 Kh7 18. Qe7 Kh6 19. Qg7 Kg5 - Sep 30 11:23 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 17. Nxe4 Kh7 18. Qe7 Kh6 19. Qg7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Kf8 10. Bxh6 f4 11. h3 Ne8 12. Nc3 d5 13. exd5 Nf6 14. Qe2 e6 15. Qb5 Kg8 16. Qb4 Ne4 17. Nxe4 Kh7 18. Qe7 Kh6 19. Qg7 - Sep 30 11:23 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Ne4 17. Nxe4 Kh7 18. Qe7 Kh6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Kf8 10. Bxh6 f4 11. h3 Ne8 12. Nc3 d5 13. exd5 Nf6 14. Qe2 e6 15. Qb5 Kg8 16. Qb4 Ne4 17. Nxe4 Kh7 18. Qe7 Kh6 - Sep 30 11:23 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 16. Qb4 Ne4 17. Nxe4 Kh7 18. Qe7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Kf8 10. Bxh6 f4 11. h3 Ne8 12. Nc3 d5 13. exd5 Nf6 14. Qe2 e6 15. Qb5 Kg8 16. Qb4 Ne4 17. Nxe4 Kh7 18. Qe7