72.0M
positions
13.3M
practically solved
258.14T
engine nodes
2.0M
analyses
6,839
in queue
12
active workers
78
active cores
6.1M
nodes / sec
26.3
positions / min
82
proof number
3,797
disproof number
Root conquest: 0/20 first moves solved · 18.5% of tree positions solved · last 24h: 506,927 closures, 5.56T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 80 over 201 open obligations, of which 33 (16.4%) 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 6.0m (median of 53) · measured at 2026-10-02 02:00 UTC
Closures by source, last 24h (506869 of 506870 labelled): USER 99.8% (505906) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.2% (963) · last 7d (2906603 of 2906655): USER 98.5% (2861954) · FILL 0.3% (8795) · AUTO 1.1% (32065) · SOLVE 0.0% (0) · NONE 0.1% (3789). 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. Nc3 h6 … Kf8 8. f3 g6 9. d4 d6 (User) · 128.0M nodes · auranvesdranor-admin-835912-atomicdb
- 1. Nh3 e6 2. Nc3 h6 … Kf8 8. f3 g6 9. d4 f6 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Nd7 15. O-O Rf8 16. Qe1 Kf7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Nd7 15. O-O Rf8 16. Qe1 Re8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … Nd7 15. O-O Rf8 16. Qe1 Kg7 (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 | 1101 | 2 | |
| g1h3 | unsolved | 820 | 2 | |
| e2e3 | unsolved | 461 | 3 | |
| d2d4 | unsolved | 437 | 2 | |
| e2e4 | unsolved | 399 | 2 | |
| b1c3 | unsolved | 131 | 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 26.3% of the fleet | 1.46T | 11,524 |
| 2 | auranvesdranor 18.8% of the fleet | 1.04T | 7,950 |
| 3 | gannet 12.7% of the fleet | 705.78B | 5,447 |
| 4 | tenzink 12.0% of the fleet | 665.56B | 4,861 |
| 5 | randomchampgamer 11.1% of the fleet | 617.81B | 4,818 |
| 6 | MoNiKaMaDnEsS 8.7% of the fleet | 483.94B | 3,731 |
| 7 | RickEdinson 8.2% of the fleet | 456.42B | 3,337 |
| 8 | quasa 2.2% of the fleet | 120.64B | 937 |
8 accounts · 5.56T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 35.0% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.0% of the fleet | 38.86T | 322,269 |
| 3 | BManBJ 12.7% of the fleet | 32.82T | 230,414 |
| 4 | auranvesdranor 11.9% of the fleet | 30.62T | 222,024 |
| 5 | randomchampgamer 4.5% of the fleet | 11.68T | 86,683 |
| 6 | JackIV 3.9% of the fleet | 10.06T | 67,859 |
| 7 | RickEdinson 2.9% of the fleet | 7.59T | 50,659 |
| 8 | gannet 2.8% of the fleet | 7.24T | 46,848 |
| 9 | MoNiKaMaDnEsS 2.0% of the fleet | 5.09T | 33,832 |
| 10 | NeoArcturus 1.6% of the fleet | 4.09T | 16,758 |
and 25 more.
35 accounts · 258.24T 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 02:39 Solved: BLACK_WIN via MINIMAXview
1. Nf3 f6 2. Nc3 c6 … 5. f3 Qc4 6. e3 e6 7. a3
1. Nf3 f6 2. Nc3 c6 3. Ng5 Qb6 4. b3 Qb4 5. f3 Qc4 6. e3 e6 7. a3 - Oct 02 02:39 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nc3 g6 … Rc6 12. e4 Rb6 13. Kh1 Bc5
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 Rc5 11. O-O Rc6 12. e4 Rb6 13. Kh1 Bc5 - Oct 02 02:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … Bd6 19. Qf7 Rxb2 20. Qe8 Kc7
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 Rc5 11. O-O Rc6 12. e4 Rb6 13. Kh1 Bc5 14. e5 Bb4 15. Qf3 a6 16. Bg5 Kc8 17. Bd7 Kd8 18. Bxf6 Bd6 19. Qf7 Rxb2 20. Qe8 Kc7 - Oct 02 02:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 18. Bxf6 Bd6 19. Qf7 Rxb2 20. Qe8
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 Rc5 11. O-O Rc6 12. e4 Rb6 13. Kh1 Bc5 14. e5 Bb4 15. Qf3 a6 16. Bg5 Kc8 17. Bd7 Kd8 18. Bxf6 Bd6 19. Qf7 Rxb2 20. Qe8 - Oct 02 02:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … Kd8 18. Bxf6 Bd6 19. Qf7 Rxb2
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 Rc5 11. O-O Rc6 12. e4 Rb6 13. Kh1 Bc5 14. e5 Bb4 15. Qf3 a6 16. Bg5 Kc8 17. Bd7 Kd8 18. Bxf6 Bd6 19. Qf7 Rxb2 - Oct 02 02:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 17. Bd7 Kd8 18. Bxf6 Bd6 19. Qf7
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 Rc5 11. O-O Rc6 12. e4 Rb6 13. Kh1 Bc5 14. e5 Bb4 15. Qf3 a6 16. Bg5 Kc8 17. Bd7 Kd8 18. Bxf6 Bd6 19. Qf7 - Oct 02 02:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … Kc8 17. Bd7 Kd8 18. Bxf6 Bd6
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 Rc5 11. O-O Rc6 12. e4 Rb6 13. Kh1 Bc5 14. e5 Bb4 15. Qf3 a6 16. Bg5 Kc8 17. Bd7 Kd8 18. Bxf6 Bd6 - Oct 02 02:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 16. Bg5 Kc8 17. Bd7 Kd8 18. Bxf6
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 Rc5 11. O-O Rc6 12. e4 Rb6 13. Kh1 Bc5 14. e5 Bb4 15. Qf3 a6 16. Bg5 Kc8 17. Bd7 Kd8 18. Bxf6 - Oct 02 02:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … a6 16. Bg5 Kc8 17. Bd7 Kd8
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 Rc5 11. O-O Rc6 12. e4 Rb6 13. Kh1 Bc5 14. e5 Bb4 15. Qf3 a6 16. Bg5 Kc8 17. Bd7 Kd8 - Oct 02 02:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 15. Qf3 a6 16. Bg5 Kc8 17. Bd7
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 Rc5 11. O-O Rc6 12. e4 Rb6 13. Kh1 Bc5 14. e5 Bb4 15. Qf3 a6 16. Bg5 Kc8 17. Bd7 - Oct 02 02:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … Bb4 15. Qf3 a6 16. Bg5 Kc8
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 Rc5 11. O-O Rc6 12. e4 Rb6 13. Kh1 Bc5 14. e5 Bb4 15. Qf3 a6 16. Bg5 Kc8 - Oct 02 02:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 14. e5 Bb4 15. Qf3 a6 16. Bg5
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 Rc5 11. O-O Rc6 12. e4 Rb6 13. Kh1 Bc5 14. e5 Bb4 15. Qf3 a6 16. Bg5