64.6M
positions
11.5M
practically solved
231.81T
engine nodes
1.8M
analyses
6,977
in queue
9
active workers
48
active cores
21.4M
nodes / sec
15.4
positions / min
125
proof number
3,777
disproof number
Root conquest: 0/20 first moves solved · 17.8% of tree positions solved · last 24h: 331,607 closures, 4.56T 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 28.1m (median of 175) · measured at 2026-09-27 14:00 UTC
Closures by source, last 24h (331468 of 331513 labelled): USER 94.2% (312237) · FILL 1.3% (4464) · AUTO 4.3% (14117) · SOLVE 0.0% (0) · NONE 0.2% (650) · last 7d (1288479 of 1288548): USER 96.7% (1245820) · FILL 0.7% (8795) · AUTO 2.5% (32065) · SOLVE 0.0% (0) · NONE 0.1% (1799). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nh3 f5 2. d4 d5 3. Ng5 e5 4. e3 e4 (User) · 10.00B nodes · BManBJ-Blake-atomicdb
- deep line, ply ≥24 · … c4 Rd8 h3 Rd7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nh3 d5 2. Nc3 h6 … Rad8 13. g3 exd4 14. Bb5 d4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nh3 d5 2. e4 h6 … 11. Bd3 Qc8 12. Nd8 Kh8 13. g4 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 d6 … e5 11. O-O Kg8 12. Qb3 d5 (User) · 128.0M nodes · randomchampgamer-2026PC-atomicdb
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 | 965 | 2 | |
| g1h3 | unsolved | 725 | 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 | NitroColoraze 29.5% of the fleet | 1.34T | 8,333 |
| 2 | BManBJ 23.6% of the fleet | 1.08T | 7,339 |
| 3 | auranvesdranor 18.3% of the fleet | 833.93B | 5,071 |
| 4 | tenzink 12.8% of the fleet | 582.37B | 3,645 |
| 5 | randomchampgamer 11.5% of the fleet | 525.13B | 3,900 |
| 6 | MoNiKaMaDnEsS 3.8% of the fleet | 174.60B | 1,258 |
| 7 | soothdest 0.4% of the fleet | 15.98B | 122 |
| 8 | RandomMatrix 0.2% of the fleet | 10.11B | 76 |
| 9 | bricerichmond <0.1% of the fleet | 700.3M | 6 |
9 accounts · 4.56T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 38.9% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.6% of the fleet | 36.23T | 304,241 |
| 3 | BManBJ 11.3% of the fleet | 26.31T | 180,552 |
| 4 | auranvesdranor 11.2% of the fleet | 25.97T | 186,606 |
| 5 | JackIV 4.3% of the fleet | 10.06T | 67,859 |
| 6 | randomchampgamer 3.9% of the fleet | 9.01T | 65,406 |
| 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 · 231.90T 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 27 14:46 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nc3 d6 … a6 12. Bg6 b5 13. Qf3 Rg8
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Be7 7. e3 h5 8. Bb5 Kf8 9. c4 Kg8 10. b4 Kh8 11. Be8 a6 12. Bg6 b5 13. Qf3 Rg8 - Sep 27 14:46 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … e5 17. Qxe5 Bf6 18. Bxf5 bxc4
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Be7 7. e3 h5 8. Bb5 Kf8 9. c4 Kg8 10. b4 Kh8 11. Be8 a6 12. Bg6 b5 13. Qf3 Rc8 14. Qg3 Rc5 15. bxc5 f5 16. Bb2 e5 17. Qxe5 Bf6 18. Bxf5 bxc4 - Sep 27 14:46 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 16. Bb2 e5 17. Qxe5 Bf6 18. Bxf5
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Be7 7. e3 h5 8. Bb5 Kf8 9. c4 Kg8 10. b4 Kh8 11. Be8 a6 12. Bg6 b5 13. Qf3 Rc8 14. Qg3 Rc5 15. bxc5 f5 16. Bb2 e5 17. Qxe5 Bf6 18. Bxf5 - Sep 27 14:46 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … f5 16. Bb2 e5 17. Qxe5 Bf6
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Be7 7. e3 h5 8. Bb5 Kf8 9. c4 Kg8 10. b4 Kh8 11. Be8 a6 12. Bg6 b5 13. Qf3 Rc8 14. Qg3 Rc5 15. bxc5 f5 16. Bb2 e5 17. Qxe5 Bf6 - Sep 27 14:46 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 15. bxc5 f5 16. Bb2 e5 17. Qxe5
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Be7 7. e3 h5 8. Bb5 Kf8 9. c4 Kg8 10. b4 Kh8 11. Be8 a6 12. Bg6 b5 13. Qf3 Rc8 14. Qg3 Rc5 15. bxc5 f5 16. Bb2 e5 17. Qxe5 - Sep 27 14:46 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … Rc5 15. bxc5 f5 16. Bb2 e5
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Be7 7. e3 h5 8. Bb5 Kf8 9. c4 Kg8 10. b4 Kh8 11. Be8 a6 12. Bg6 b5 13. Qf3 Rc8 14. Qg3 Rc5 15. bxc5 f5 16. Bb2 e5 - Sep 27 14:46 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 14. Qg3 Rc5 15. bxc5 f5 16. Bb2
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Be7 7. e3 h5 8. Bb5 Kf8 9. c4 Kg8 10. b4 Kh8 11. Be8 a6 12. Bg6 b5 13. Qf3 Rc8 14. Qg3 Rc5 15. bxc5 f5 16. Bb2 - Sep 27 14:46 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … Rc8 14. Qg3 Rc5 15. bxc5 f5
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Be7 7. e3 h5 8. Bb5 Kf8 9. c4 Kg8 10. b4 Kh8 11. Be8 a6 12. Bg6 b5 13. Qf3 Rc8 14. Qg3 Rc5 15. bxc5 f5 - Sep 27 14:46 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 13. Qf3 Rc8 14. Qg3 Rc5 15. bxc5
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Be7 7. e3 h5 8. Bb5 Kf8 9. c4 Kg8 10. b4 Kh8 11. Be8 a6 12. Bg6 b5 13. Qf3 Rc8 14. Qg3 Rc5 15. bxc5 - Sep 27 14:46 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … b5 13. Qf3 Rc8 14. Qg3 Rc5
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Be7 7. e3 h5 8. Bb5 Kf8 9. c4 Kg8 10. b4 Kh8 11. Be8 a6 12. Bg6 b5 13. Qf3 Rc8 14. Qg3 Rc5 - Sep 27 14:46 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 12. Bg6 b5 13. Qf3 Rc8 14. Qg3
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Be7 7. e3 h5 8. Bb5 Kf8 9. c4 Kg8 10. b4 Kh8 11. Be8 a6 12. Bg6 b5 13. Qf3 Rc8 14. Qg3 - Sep 27 14:46 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … b5 13. Qf3 Rg8 14. Qf4 Rc8
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Be7 7. e3 h5 8. Bb5 Kf8 9. c4 Kg8 10. b4 Kh8 11. Be8 a6 12. Bg6 b5 13. Qf3 Rg8 14. Qf4 Rc8