81.7M
positions
15.7M
practically solved
297.77T
engine nodes
2.3M
analyses
5,296
in queue
4
active workers
26
active cores
12.3M
nodes / sec
7.3
positions / min
85
proof number
4,552
disproof number
Root conquest: 0/20 first moves solved · 19.2% of tree positions solved · last 24h: 102,575 closures, 3.96T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 70 over 218 open obligations, of which 41 (18.8%) 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 2.6m (median of 8) · measured at 2026-10-11 19:00 UTC
Closures by source, last 24h (102575 of 102575 labelled): USER 82.8% (84952) · FILL 0.6% (625) · AUTO 16.5% (16931) · SOLVE 0.0% (0) · NONE 0.1% (67) · last 7d (1617803 of 1617803): USER 98.0% (1585170) · FILL 0.2% (2696) · AUTO 1.8% (28883) · SOLVE 0.0% (0) · NONE 0.1% (1054). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nf3 f6 2. Nc3 Nh6 … 14. b4 Qa3 15. Qxa3 g6 16. c4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … 16. c4 h5 17. Qc1 Rc8 18. Qd2 (User) · 512.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nh3 d5 2. Nc3 h6 … 11. e4 c5 12. exd5 Rh7 13. d5 (User) · 512.0M nodes · randomchampgamer-2026PC-atomicdb
- 1. Nf3 f6 2. Nc3 Nh6 … Qa3 15. Qxa3 g6 16. c4 a5 (User) · 128.0M nodes · RickEdinson-MSI-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 | 1133 | 2 | |
| g1h3 | unsolved | 753 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| e2e4 | unsolved | 400 | 2 | |
| d2d4 | unsolved | 389 | 2 | |
| b1c3 | unsolved | 127 | 2 | |
| b1a3 | unsolved | 0 | 3 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b2b4 | unsolved | -73 | 3 | |
| h2h3 | unsolved | -97 | 2 | |
| d2d3 | unsolved | -98 | 2 | |
| a2a3 | unsolved | -100 | 2 | |
| f2f3 | unsolved | -117 | 3 | |
| b2b3 | unsolved | -144 | 1 | |
| f2f4 | unsolved | -260 | 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 | Torom 43.4% of the fleet | 1.72T | 12,426 |
| 2 | BManBJ 29.3% of the fleet | 1.16T | 9,690 |
| 3 | randomchampgamer 14.5% of the fleet | 575.99B | 3,746 |
| 4 | RickEdinson 9.8% of the fleet | 389.79B | 2,962 |
| 5 | MoNiKaMaDnEsS 2.9% of the fleet | 114.56B | 1,690 |
5 accounts · 3.96T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 30.3% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 15.7% of the fleet | 46.69T | 325,378 |
| 3 | tenzink 14.4% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.5% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 6.1% of the fleet | 18.04T | 129,961 |
| 6 | RickEdinson 4.0% of the fleet | 11.98T | 79,340 |
| 7 | Torom 4.0% of the fleet | 11.88T | 87,075 |
| 8 | JackIV 3.4% of the fleet | 10.06T | 67,859 |
| 9 | gannet 2.4% of the fleet | 7.24T | 46,848 |
| 10 | MoNiKaMaDnEsS 2.3% of the fleet | 6.80T | 46,031 |
and 25 more.
35 accounts · 297.83T 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 · 18 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 · 5 votes
- The weaker of the two f-pawn advances for 1. ...d61. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4proposed by MoNiKaMaDnEsS · 4 votes
- Refuting 1... d61. Nf3 d6 2. Nc3proposed by randomchampgamer · 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 23 proposals · see every proposal
Milestones
- Oct 11 19:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Kd8 17. Be8 g5 18. Bd7 g4
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 f5 6. h4 fxg4 7. Bxh6 Bb4 8. f4 d5 9. e5 Rf8 10. Qf3 Rf5 11. Be2 Bxc3 12. b4 Na6 13. O-O Nc5 14. bxc5 Qa5 15. Qa3 Qxa3 16. Bh5 Kd8 17. Be8 g5 18. Bd7 g4 - Oct 11 19:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 16. Bh5 Kd8 17. Be8 g5 18. Bd7
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 f5 6. h4 fxg4 7. Bxh6 Bb4 8. f4 d5 9. e5 Rf8 10. Qf3 Rf5 11. Be2 Bxc3 12. b4 Na6 13. O-O Nc5 14. bxc5 Qa5 15. Qa3 Qxa3 16. Bh5 Kd8 17. Be8 g5 18. Bd7 - Oct 11 19:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Qxa3 16. Bh5 Kd8 17. Be8 g5
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 f5 6. h4 fxg4 7. Bxh6 Bb4 8. f4 d5 9. e5 Rf8 10. Qf3 Rf5 11. Be2 Bxc3 12. b4 Na6 13. O-O Nc5 14. bxc5 Qa5 15. Qa3 Qxa3 16. Bh5 Kd8 17. Be8 g5 - Oct 11 19:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … b5 19. Rf8 Ke7 20. Bd7 Ba6
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 f5 6. h4 fxg4 7. Bxh6 Bb4 8. f4 d5 9. e5 Rf8 10. Qf3 Rf5 11. Be2 Bxc3 12. b4 Na6 13. O-O Nc5 14. bxc5 Qa5 15. Qa3 Qxa3 16. Bh5 Kd8 17. Be8 Rg5 18. fxg5 b5 19. Rf8 Ke7 20. Bd7 Ba6 - Oct 11 19:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 18. fxg5 b5 19. Rf8 Ke7 20. Bd7
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 f5 6. h4 fxg4 7. Bxh6 Bb4 8. f4 d5 9. e5 Rf8 10. Qf3 Rf5 11. Be2 Bxc3 12. b4 Na6 13. O-O Nc5 14. bxc5 Qa5 15. Qa3 Qxa3 16. Bh5 Kd8 17. Be8 Rg5 18. fxg5 b5 19. Rf8 Ke7 20. Bd7 - Oct 11 19:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Rg5 18. fxg5 b5 19. Rf8 Ke7
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 f5 6. h4 fxg4 7. Bxh6 Bb4 8. f4 d5 9. e5 Rf8 10. Qf3 Rf5 11. Be2 Bxc3 12. b4 Na6 13. O-O Nc5 14. bxc5 Qa5 15. Qa3 Qxa3 16. Bh5 Kd8 17. Be8 Rg5 18. fxg5 b5 19. Rf8 Ke7 - Oct 11 19:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 17. Be8 Rg5 18. fxg5 b5 19. Rf8
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 f5 6. h4 fxg4 7. Bxh6 Bb4 8. f4 d5 9. e5 Rf8 10. Qf3 Rf5 11. Be2 Bxc3 12. b4 Na6 13. O-O Nc5 14. bxc5 Qa5 15. Qa3 Qxa3 16. Bh5 Kd8 17. Be8 Rg5 18. fxg5 b5 19. Rf8 - Oct 11 19:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Kd8 17. Be8 Rg5 18. fxg5 b5
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 f5 6. h4 fxg4 7. Bxh6 Bb4 8. f4 d5 9. e5 Rf8 10. Qf3 Rf5 11. Be2 Bxc3 12. b4 Na6 13. O-O Nc5 14. bxc5 Qa5 15. Qa3 Qxa3 16. Bh5 Kd8 17. Be8 Rg5 18. fxg5 b5 - Oct 11 19:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 16. Bh5 Kd8 17. Be8 Rg5 18. fxg5
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 f5 6. h4 fxg4 7. Bxh6 Bb4 8. f4 d5 9. e5 Rf8 10. Qf3 Rf5 11. Be2 Bxc3 12. b4 Na6 13. O-O Nc5 14. bxc5 Qa5 15. Qa3 Qxa3 16. Bh5 Kd8 17. Be8 Rg5 18. fxg5 - Oct 11 19:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Qxa3 16. Bh5 Kd8 17. Be8 Rg5
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 f5 6. h4 fxg4 7. Bxh6 Bb4 8. f4 d5 9. e5 Rf8 10. Qf3 Rf5 11. Be2 Bxc3 12. b4 Na6 13. O-O Nc5 14. bxc5 Qa5 15. Qa3 Qxa3 16. Bh5 Kd8 17. Be8 Rg5 - Oct 11 19:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … c5 18. dxc5 Kf7 19. Qe7 Kg6
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 f5 6. h4 fxg4 7. Bxh6 Bb4 8. f4 d5 9. e5 Rf8 10. Qf3 Rf5 11. Be2 Bxc3 12. b4 Na6 13. O-O Nc5 14. bxc5 Qa5 15. Qa3 Qe1 16. Rfxe1 Rg5 17. fxg5 c5 18. dxc5 Kf7 19. Qe7 Kg6 - Oct 11 19:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 17. fxg5 c5 18. dxc5 Kf7 19. Qe7
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 f5 6. h4 fxg4 7. Bxh6 Bb4 8. f4 d5 9. e5 Rf8 10. Qf3 Rf5 11. Be2 Bxc3 12. b4 Na6 13. O-O Nc5 14. bxc5 Qa5 15. Qa3 Qe1 16. Rfxe1 Rg5 17. fxg5 c5 18. dxc5 Kf7 19. Qe7