65.8M
positions
11.8M
practically solved
236.56T
engine nodes
1.8M
analyses
6,500
in queue
12
active workers
80
active cores
14.2M
nodes / sec
21.8
positions / min
83
proof number
3,835
disproof number
Root conquest: 0/20 first moves solved · 17.9% of tree positions solved · last 24h: 215,605 closures, 4.26T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 81 over 195 open obligations, of which 31 (15.9%) 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 2.9m (median of 100) · measured at 2026-09-28 18:00 UTC
Closures by source, last 24h (215605 of 215605 labelled): USER 99.8% (215193) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.2% (412) · last 7d (1500225 of 1500225): USER 97.1% (1457250) · FILL 0.6% (8795) · AUTO 2.1% (32065) · SOLVE 0.0% (0) · NONE 0.1% (2115). 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 … Ba5 19. d4 Nf6 20. Bg5 Bc7 (User) · 128.0M nodes · auranvesdranor-admin-835912-atomicdb
- 1. Nh3 e6 2. e3 g6 … Ba5 19. d4 Nf6 20. Bg5 Bb4 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Bg7 10. Na3 a5 11. c4 e6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Bg7 10. Na3 a5 11. c4 bxc4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … Bg7 10. Na3 a5 11. c4 g5 (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 | 1046 | 2 | |
| g1h3 | unsolved | 786 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 436 | 2 | |
| e2e4 | unsolved | 417 | 2 | |
| b1c3 | unsolved | 142 | 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 | 3 | |
| d2d3 | unsolved | -116 | 2 | |
| b2b3 | unsolved | -119 | 1 | |
| f2f4 | unsolved | -301 | 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 33.4% of the fleet | 1.42T | 10,659 |
| 2 | auranvesdranor 24.9% of the fleet | 1.06T | 8,163 |
| 3 | randomchampgamer 13.2% of the fleet | 562.92B | 4,473 |
| 4 | tenzink 12.5% of the fleet | 531.14B | 3,058 |
| 5 | uipio 7.5% of the fleet | 317.54B | 1,518 |
| 6 | gannet 6.4% of the fleet | 273.19B | 454 |
| 7 | bricerichmond 1.8% of the fleet | 77.47B | 107 |
| 8 | soothdest 0.3% of the fleet | 12.83B | 91 |
| 9 | NeoArcturus <0.1% of the fleet | 142.6M | 2 |
9 accounts · 4.26T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 38.1% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.6% of the fleet | 36.85T | 307,937 |
| 3 | BManBJ 11.8% of the fleet | 27.95T | 192,871 |
| 4 | auranvesdranor 11.5% of the fleet | 27.17T | 195,764 |
| 5 | JackIV 4.2% of the fleet | 10.06T | 67,859 |
| 6 | randomchampgamer 4.1% of the fleet | 9.67T | 70,561 |
| 7 | RickEdinson 2.7% of the fleet | 6.50T | 43,070 |
| 8 | MoNiKaMaDnEsS 1.7% of the fleet | 4.14T | 26,565 |
| 9 | NeoArcturus 1.7% of the fleet | 4.09T | 16,758 |
| 10 | ijh 1.5% of the fleet | 3.57T | 37,348 |
and 25 more.
35 accounts · 236.70T 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 28 18:46 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nc3 d6 … Kf8 9. Bd7 Rc8 10. Bxe6 Ke7
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 f5 7. e3 Be7 8. Bb5 Kf8 9. Bd7 Rc8 10. Bxe6 Ke7 - Sep 28 18:46 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … Ke8 16. Rc1 g3 17. hxg3 a6
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 f5 7. e3 Be7 8. Bb5 Kf8 9. Bd7 Rc8 10. Bxe6 Ke7 11. b3 Rxc2 12. Rc1 g5 13. Rc7 Kf8 14. O-O g4 15. Rf7 Ke8 16. Rc1 g3 17. hxg3 a6 - Sep 28 18:46 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 15. Rf7 Ke8 16. Rc1 g3 17. hxg3
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 f5 7. e3 Be7 8. Bb5 Kf8 9. Bd7 Rc8 10. Bxe6 Ke7 11. b3 Rxc2 12. Rc1 g5 13. Rc7 Kf8 14. O-O g4 15. Rf7 Ke8 16. Rc1 g3 17. hxg3 - Sep 28 18:46 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … g4 15. Rf7 Ke8 16. Rc1 g3
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 f5 7. e3 Be7 8. Bb5 Kf8 9. Bd7 Rc8 10. Bxe6 Ke7 11. b3 Rxc2 12. Rc1 g5 13. Rc7 Kf8 14. O-O g4 15. Rf7 Ke8 16. Rc1 g3 - Sep 28 18:46 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 14. O-O g4 15. Rf7 Ke8 16. Rc1
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 f5 7. e3 Be7 8. Bb5 Kf8 9. Bd7 Rc8 10. Bxe6 Ke7 11. b3 Rxc2 12. Rc1 g5 13. Rc7 Kf8 14. O-O g4 15. Rf7 Ke8 16. Rc1 - Sep 28 18:46 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … Kf8 14. O-O g4 15. Rf7 Ke8
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 f5 7. e3 Be7 8. Bb5 Kf8 9. Bd7 Rc8 10. Bxe6 Ke7 11. b3 Rxc2 12. Rc1 g5 13. Rc7 Kf8 14. O-O g4 15. Rf7 Ke8 - Sep 28 18:46 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 13. Rc7 Kf8 14. O-O g4 15. Rf7
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 f5 7. e3 Be7 8. Bb5 Kf8 9. Bd7 Rc8 10. Bxe6 Ke7 11. b3 Rxc2 12. Rc1 g5 13. Rc7 Kf8 14. O-O g4 15. Rf7 - Sep 28 18:46 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … g5 13. Rc7 Kf8 14. O-O g4
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 f5 7. e3 Be7 8. Bb5 Kf8 9. Bd7 Rc8 10. Bxe6 Ke7 11. b3 Rxc2 12. Rc1 g5 13. Rc7 Kf8 14. O-O g4 - Sep 28 18:46 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 12. Rc1 g5 13. Rc7 Kf8 14. O-O
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 f5 7. e3 Be7 8. Bb5 Kf8 9. Bd7 Rc8 10. Bxe6 Ke7 11. b3 Rxc2 12. Rc1 g5 13. Rc7 Kf8 14. O-O - Sep 28 18:46 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … Rxc2 12. Rc1 g5 13. Rc7 Kf8
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 f5 7. e3 Be7 8. Bb5 Kf8 9. Bd7 Rc8 10. Bxe6 Ke7 11. b3 Rxc2 12. Rc1 g5 13. Rc7 Kf8 - Sep 28 18:46 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 11. b3 Rxc2 12. Rc1 g5 13. Rc7
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 f5 7. e3 Be7 8. Bb5 Kf8 9. Bd7 Rc8 10. Bxe6 Ke7 11. b3 Rxc2 12. Rc1 g5 13. Rc7 - Sep 28 18:46 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … Ke7 11. b3 Rxc2 12. Rc1 g5
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 f5 7. e3 Be7 8. Bb5 Kf8 9. Bd7 Rc8 10. Bxe6 Ke7 11. b3 Rxc2 12. Rc1 g5