71.3M
positions
13.1M
practically solved
256.09T
engine nodes
2.0M
analyses
4,749
in queue
14
active workers
81
active cores
11.0M
nodes / sec
25.7
positions / min
82
proof number
3,797
disproof number
Root conquest: 0/20 first moves solved · 18.4% of tree positions solved · last 24h: 517,475 closures, 7.00T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 81 over 199 open obligations, of which 31 (15.6%) 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 10.4h (median of 97) · measured at 2026-10-01 15:00 UTC
Closures by source, last 24h (517197 of 517197 labelled): USER 99.9% (516645) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.1% (552) · last 7d (2734815 of 2735007): USER 98.4% (2690633) · FILL 0.3% (8795) · AUTO 1.2% (32065) · SOLVE 0.0% (0) · NONE 0.1% (3322). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nh3 f6 2. Nc3 h6 … 7. Nf4 g6 8. h3 f5 9. Ne2 (User) · 128.0M nodes · auranvesdranor-admin-835912-atomicdb
- 1. Nh3 f6 2. Nc3 h6 … 7. Nf4 g6 8. h3 f5 9. c4 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … g5 13. Nc3 Rc8 14. Nd5 h4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … g5 13. Nc3 Rc8 14. Nd5 Ng4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … g5 13. Nc3 Rc8 14. Nd5 f3 (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 | 817 | 2 | |
| e2e3 | unsolved | 457 | 3 | |
| d2d4 | unsolved | 434 | 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 | -98 | 2 | |
| d2d3 | unsolved | -116 | 2 | |
| f2f3 | unsolved | -117 | 3 | |
| a2a3 | unsolved | -127 | 2 | |
| b2b3 | unsolved | -169 | 1 | |
| f2f4 | unsolved | -302 | 3 | |
| h2h4 | unsolved | -500 | 2 | |
| a2a4 | unsolved | -510 | 2 | |
| g2g4 | unsolved | -602 | 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 31.6% of the fleet | 2.21T | 17,107 |
| 2 | BManBJ 21.0% of the fleet | 1.47T | 11,355 |
| 3 | auranvesdranor 14.9% of the fleet | 1.04T | 7,907 |
| 4 | tenzink 9.1% of the fleet | 634.42B | 4,649 |
| 5 | randomchampgamer 9.0% of the fleet | 626.38B | 5,027 |
| 6 | MoNiKaMaDnEsS 6.6% of the fleet | 461.50B | 3,573 |
| 7 | RickEdinson 6.2% of the fleet | 433.34B | 3,027 |
| 8 | quasa 1.7% of the fleet | 120.64B | 937 |
| 9 | soothdest <0.1% of the fleet | 1.47B | 35 |
9 accounts · 7.00T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 35.2% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.1% of the fleet | 38.57T | 320,155 |
| 3 | BManBJ 12.5% of the fleet | 32.14T | 224,970 |
| 4 | auranvesdranor 11.8% of the fleet | 30.14T | 218,358 |
| 5 | randomchampgamer 4.5% of the fleet | 11.41T | 84,657 |
| 6 | JackIV 3.9% of the fleet | 10.06T | 67,859 |
| 7 | RickEdinson 2.9% of the fleet | 7.39T | 49,224 |
| 8 | gannet 2.8% of the fleet | 7.24T | 46,848 |
| 9 | MoNiKaMaDnEsS 1.9% of the fleet | 4.99T | 33,059 |
| 10 | NeoArcturus 1.6% of the fleet | 4.09T | 16,758 |
and 25 more.
35 accounts · 256.22T 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 01 15:41 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nc3 g6 … h5 12. Kh1 Bd6 13. h3 Be7
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 Bb4 10. c3 Bf8 11. O-O h5 12. Kh1 Bd6 13. h3 Be7 - Oct 01 15:41 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … Re3 19. Bxe3 h4 20. Qf7 a4
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 Bb4 10. c3 Bf8 11. O-O h5 12. Kh1 Bd6 13. h3 Be7 14. e4 a6 15. Bd7 a5 16. Bxe6 Ra6 17. exd5 Re6 18. Qb3 Re3 19. Bxe3 h4 20. Qf7 a4 - Oct 01 15:41 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 18. Qb3 Re3 19. Bxe3 h4 20. 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 Bb4 10. c3 Bf8 11. O-O h5 12. Kh1 Bd6 13. h3 Be7 14. e4 a6 15. Bd7 a5 16. Bxe6 Ra6 17. exd5 Re6 18. Qb3 Re3 19. Bxe3 h4 20. Qf7 - Oct 01 15:41 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … Re6 18. Qb3 Re3 19. Bxe3 h4
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 Bb4 10. c3 Bf8 11. O-O h5 12. Kh1 Bd6 13. h3 Be7 14. e4 a6 15. Bd7 a5 16. Bxe6 Ra6 17. exd5 Re6 18. Qb3 Re3 19. Bxe3 h4 - Oct 01 15:41 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 17. exd5 Re6 18. Qb3 Re3 19. Bxe3
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 Bb4 10. c3 Bf8 11. O-O h5 12. Kh1 Bd6 13. h3 Be7 14. e4 a6 15. Bd7 a5 16. Bxe6 Ra6 17. exd5 Re6 18. Qb3 Re3 19. Bxe3 - Oct 01 15:41 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … Ra6 17. exd5 Re6 18. Qb3 Re3
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 Bb4 10. c3 Bf8 11. O-O h5 12. Kh1 Bd6 13. h3 Be7 14. e4 a6 15. Bd7 a5 16. Bxe6 Ra6 17. exd5 Re6 18. Qb3 Re3 - Oct 01 15:41 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 16. Bxe6 Ra6 17. exd5 Re6 18. Qb3
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 Bb4 10. c3 Bf8 11. O-O h5 12. Kh1 Bd6 13. h3 Be7 14. e4 a6 15. Bd7 a5 16. Bxe6 Ra6 17. exd5 Re6 18. Qb3 - Oct 01 15:41 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … a5 16. Bxe6 Ra6 17. exd5 Re6
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 Bb4 10. c3 Bf8 11. O-O h5 12. Kh1 Bd6 13. h3 Be7 14. e4 a6 15. Bd7 a5 16. Bxe6 Ra6 17. exd5 Re6 - Oct 01 15:41 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 15. Bd7 a5 16. Bxe6 Ra6 17. 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 Bb4 10. c3 Bf8 11. O-O h5 12. Kh1 Bd6 13. h3 Be7 14. e4 a6 15. Bd7 a5 16. Bxe6 Ra6 17. exd5 - Oct 01 15:41 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … a6 15. Bd7 a5 16. Bxe6 Ra6
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 Bb4 10. c3 Bf8 11. O-O h5 12. Kh1 Bd6 13. h3 Be7 14. e4 a6 15. Bd7 a5 16. Bxe6 Ra6 - Oct 01 15:41 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 14. e4 a6 15. Bd7 a5 16. Bxe6
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 Bb4 10. c3 Bf8 11. O-O h5 12. Kh1 Bd6 13. h3 Be7 14. e4 a6 15. Bd7 a5 16. Bxe6 - Oct 01 15:41 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … Be7 14. e4 a6 15. Bd7 a5
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 Bb4 10. c3 Bf8 11. O-O h5 12. Kh1 Bd6 13. h3 Be7 14. e4 a6 15. Bd7 a5