65.0M
positions
11.6M
practically solved
233.24T
engine nodes
1.8M
analyses
7,282
in queue
10
active workers
64
active cores
11.8M
nodes / sec
18.4
positions / min
125
proof number
3,777
disproof number
Root conquest: 0/20 first moves solved · 17.8% of tree positions solved · last 24h: 327,821 closures, 3.35T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 81 over 192 open obligations, of which 30 (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 24.3m (median of 232) · measured at 2026-09-28 00:00 UTC
Closures by source, last 24h (327821 of 327821 labelled): USER 99.4% (326000) · FILL 0.1% (477) · AUTO 0.3% (1085) · SOLVE 0.0% (0) · NONE 0.1% (259) · last 7d (1329938 of 1329938): USER 96.8% (1287342) · FILL 0.7% (8795) · AUTO 2.4% (32065) · SOLVE 0.0% (0) · NONE 0.1% (1736). 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. Nd5 Kb8 9. b4 f5 10. Qe2 (User) · 128.0M nodes · auranvesdranor-admin-835912-atomicdb
- 1. Nh3 e6 2. e3 g6 … 8. Nd5 Kb8 9. b4 f5 10. Rg1 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Bb7 11. Na3 Kf7 12. O-O Bc6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Bb7 11. Na3 Kf7 12. O-O Bd5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … Bb7 11. Na3 Kf7 12. O-O Bxe4 (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 | 1002 | 2 | |
| g1h3 | unsolved | 775 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 435 | 2 | |
| e2e4 | unsolved | 417 | 2 | |
| b1c3 | unsolved | 183 | 2 | |
| c2c3 | unsolved | 19 | 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 | -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 36.0% of the fleet | 1.21T | 8,639 |
| 2 | auranvesdranor 26.5% of the fleet | 888.60B | 6,026 |
| 3 | randomchampgamer 17.1% of the fleet | 572.52B | 4,502 |
| 4 | tenzink 16.8% of the fleet | 563.15B | 3,623 |
| 5 | MoNiKaMaDnEsS 2.9% of the fleet | 98.75B | 664 |
| 6 | soothdest 0.5% of the fleet | 17.08B | 132 |
| 7 | rhaxier <0.1% of the fleet | 1.66B | 13 |
| 8 | bricerichmond <0.1% of the fleet | 700.3M | 6 |
8 accounts · 3.35T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 38.7% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.6% of the fleet | 36.44T | 305,609 |
| 3 | BManBJ 11.5% of the fleet | 26.85T | 184,723 |
| 4 | auranvesdranor 11.3% of the fleet | 26.35T | 189,422 |
| 5 | JackIV 4.3% of the fleet | 10.06T | 67,859 |
| 6 | randomchampgamer 4.0% of the fleet | 9.23T | 67,137 |
| 7 | RickEdinson 2.8% of the fleet | 6.50T | 43,070 |
| 8 | MoNiKaMaDnEsS 1.8% of the fleet | 4.14T | 26,565 |
| 9 | NeoArcturus 1.8% of the fleet | 4.09T | 16,756 |
| 10 | ijh 1.5% of the fleet | 3.57T | 37,348 |
and 23 more.
33 accounts · 233.25T 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 00:08 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nc3 g6 … Bf8 12. c4 b6 13. Bd2 Bg7
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 Be7 8. Bb5 Kf8 9. Be8 h5 10. d4 Kg8 11. O-O Bf8 12. c4 b6 13. Bd2 Bg7 - Sep 28 00:08 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … d5 17. Qg3 Kf8 18. Qg7 Ke8
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 Be7 8. Bb5 Kf8 9. Be8 h5 10. d4 Kg8 11. O-O Bf8 12. c4 b6 13. Bd2 Bg7 14. Qf3 Rc8 15. Bxg6 Rc5 16. dxc5 d5 17. Qg3 Kf8 18. Qg7 Ke8 - Sep 28 00:08 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 16. dxc5 d5 17. Qg3 Kf8 18. Qg7
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 Be7 8. Bb5 Kf8 9. Be8 h5 10. d4 Kg8 11. O-O Bf8 12. c4 b6 13. Bd2 Bg7 14. Qf3 Rc8 15. Bxg6 Rc5 16. dxc5 d5 17. Qg3 Kf8 18. Qg7 - Sep 28 00:08 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … Rc5 16. dxc5 d5 17. Qg3 Kf8
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 Be7 8. Bb5 Kf8 9. Be8 h5 10. d4 Kg8 11. O-O Bf8 12. c4 b6 13. Bd2 Bg7 14. Qf3 Rc8 15. Bxg6 Rc5 16. dxc5 d5 17. Qg3 Kf8 - Sep 28 00:08 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 15. Bxg6 Rc5 16. dxc5 d5 17. Qg3
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 Be7 8. Bb5 Kf8 9. Be8 h5 10. d4 Kg8 11. O-O Bf8 12. c4 b6 13. Bd2 Bg7 14. Qf3 Rc8 15. Bxg6 Rc5 16. dxc5 d5 17. Qg3 - Sep 28 00:08 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … Rc8 15. Bxg6 Rc5 16. dxc5 d5
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 Be7 8. Bb5 Kf8 9. Be8 h5 10. d4 Kg8 11. O-O Bf8 12. c4 b6 13. Bd2 Bg7 14. Qf3 Rc8 15. Bxg6 Rc5 16. dxc5 d5 - Sep 28 00:08 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 14. Qf3 Rc8 15. Bxg6 Rc5 16. dxc5
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 Be7 8. Bb5 Kf8 9. Be8 h5 10. d4 Kg8 11. O-O Bf8 12. c4 b6 13. Bd2 Bg7 14. Qf3 Rc8 15. Bxg6 Rc5 16. dxc5 - Sep 28 00:08 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … Bg7 14. Qf3 Rc8 15. Bxg6 Rc5
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 Be7 8. Bb5 Kf8 9. Be8 h5 10. d4 Kg8 11. O-O Bf8 12. c4 b6 13. Bd2 Bg7 14. Qf3 Rc8 15. Bxg6 Rc5 - Sep 28 00:08 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 13. Bd2 Bg7 14. Qf3 Rc8 15. Bxg6
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 Be7 8. Bb5 Kf8 9. Be8 h5 10. d4 Kg8 11. O-O Bf8 12. c4 b6 13. Bd2 Bg7 14. Qf3 Rc8 15. Bxg6 - Sep 28 00:08 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … b6 13. Bd2 Bg7 14. Qf3 Rc8
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 Be7 8. Bb5 Kf8 9. Be8 h5 10. d4 Kg8 11. O-O Bf8 12. c4 b6 13. Bd2 Bg7 14. Qf3 Rc8 - Sep 28 00:08 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 12. c4 b6 13. Bd2 Bg7 14. Qf3
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 Be7 8. Bb5 Kf8 9. Be8 h5 10. d4 Kg8 11. O-O Bf8 12. c4 b6 13. Bd2 Bg7 14. Qf3 - Sep 28 00:08 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nc3 g6 … Rb8 11. c3 e5 12. e4 Bf6
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 Be7 8. Bb5 Kf8 9. d4 f5 10. O-O Rb8 11. c3 e5 12. e4 Bf6