99.6M
positions
20.8M
practically solved
361.96T
engine nodes
2.7M
analyses
1,571
in queue
4
active workers
24
active cores
19.4M
nodes / sec
7.6
positions / min
108
proof number
4,747
disproof number
Root conquest: 0/20 first moves solved · 20.9% of tree positions solved · last 24h: 276,536 closures, 7.14T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 over 200 open obligations, of which 37 (18.5%) 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 3.9m (median of 55) · measured at 2026-10-25 00:00 UTC
Closures by source, last 24h (276536 of 276536 labelled): USER 99.8% (275906) · FILL 0.2% (476) · AUTO 0.0% (64) · SOLVE 0.0% (0) · NONE 0.0% (90) · last 7d (4162563 of 4162563): USER 99.5% (4142157) · FILL 0.2% (9305) · AUTO 0.2% (8249) · SOLVE 0.0% (0) · NONE 0.1% (2852). 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 … Bb4 7. h4 Na6 8. Be2 f4 (User) · 512.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … f5 8. b4 Be7 9. O-O g6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. e4 e6 … 9. Ne5 fxe4 10. O-O Bh4 11. f4 (User) · 512.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … Bb4 7. c3 a6 8. d5 h6 (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 | 1228 | 2 | |
| g1h3 | unsolved | 759 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 401 | 2 | |
| e2e4 | unsolved | 401 | 2 | |
| b1c3 | unsolved | 138 | 2 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b1a3 | unsolved | 0 | 3 | |
| b2b4 | unsolved | -65 | 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 63.0% of the fleet | 4.50T | 33,988 |
| 2 | BManBJ 23.5% of the fleet | 1.68T | 11,222 |
| 3 | RickEdinson 6.8% of the fleet | 485.29B | 3,314 |
| 4 | MoNiKaMaDnEsS 6.7% of the fleet | 480.87B | 3,699 |
4 accounts · 7.14T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 24.9% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 18.5% of the fleet | 66.91T | 475,107 |
| 3 | Torom 12.2% of the fleet | 44.19T | 322,289 |
| 4 | tenzink 11.8% of the fleet | 42.83T | 349,427 |
| 5 | auranvesdranor 8.7% of the fleet | 31.40T | 228,002 |
| 6 | randomchampgamer 5.5% of the fleet | 19.85T | 140,897 |
| 7 | RickEdinson 5.0% of the fleet | 17.95T | 118,967 |
| 8 | MoNiKaMaDnEsS 2.9% of the fleet | 10.55T | 73,466 |
| 9 | JackIV 2.8% of the fleet | 10.06T | 67,859 |
| 10 | gannet 2.0% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 361.97T 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 25 00:12 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. e4 e6 … h5 9. Ba6 g5 10. g4 f5
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 b6 5. Nc7 Qxc7 6. d4 Nh6 7. h3 Ng4 8. hxg4 h5 9. Ba6 g5 10. g4 f5 - Oct 25 00:12 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Kg4 22. Qh3 Kg3 23. Ke1 Kf2
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 b6 5. Nc7 Qxc7 6. d4 Nh6 7. h3 Ng4 8. hxg4 h5 9. Ba6 g5 10. g4 f5 11. gxh5 Rh2 12. Rxh2 g4 13. f3 Kf7 14. Bc8 f4 15. fxg4 f3 16. Kf2 Be7 17. Bg5 Bb4 18. c3 Bd6 19. e5 Kg6 20. Qc2 Kh5 21. Qh7 Kg4 22. Qh3 Kg3 23. Ke1 Kf2 - Oct 25 00:12 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 21. Qh7 Kg4 22. Qh3 Kg3 23. Ke1
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 b6 5. Nc7 Qxc7 6. d4 Nh6 7. h3 Ng4 8. hxg4 h5 9. Ba6 g5 10. g4 f5 11. gxh5 Rh2 12. Rxh2 g4 13. f3 Kf7 14. Bc8 f4 15. fxg4 f3 16. Kf2 Be7 17. Bg5 Bb4 18. c3 Bd6 19. e5 Kg6 20. Qc2 Kh5 21. Qh7 Kg4 22. Qh3 Kg3 23. Ke1 - Oct 25 00:12 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Kh5 21. Qh7 Kg4 22. Qh3 Kg3
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 b6 5. Nc7 Qxc7 6. d4 Nh6 7. h3 Ng4 8. hxg4 h5 9. Ba6 g5 10. g4 f5 11. gxh5 Rh2 12. Rxh2 g4 13. f3 Kf7 14. Bc8 f4 15. fxg4 f3 16. Kf2 Be7 17. Bg5 Bb4 18. c3 Bd6 19. e5 Kg6 20. Qc2 Kh5 21. Qh7 Kg4 22. Qh3 Kg3 - Oct 25 00:12 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 20. Qc2 Kh5 21. Qh7 Kg4 22. Qh3
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 b6 5. Nc7 Qxc7 6. d4 Nh6 7. h3 Ng4 8. hxg4 h5 9. Ba6 g5 10. g4 f5 11. gxh5 Rh2 12. Rxh2 g4 13. f3 Kf7 14. Bc8 f4 15. fxg4 f3 16. Kf2 Be7 17. Bg5 Bb4 18. c3 Bd6 19. e5 Kg6 20. Qc2 Kh5 21. Qh7 Kg4 22. Qh3 - Oct 25 00:12 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Kg6 20. Qc2 Kh5 21. Qh7 Kg4
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 b6 5. Nc7 Qxc7 6. d4 Nh6 7. h3 Ng4 8. hxg4 h5 9. Ba6 g5 10. g4 f5 11. gxh5 Rh2 12. Rxh2 g4 13. f3 Kf7 14. Bc8 f4 15. fxg4 f3 16. Kf2 Be7 17. Bg5 Bb4 18. c3 Bd6 19. e5 Kg6 20. Qc2 Kh5 21. Qh7 Kg4 - Oct 25 00:12 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 19. e5 Kg6 20. Qc2 Kh5 21. Qh7
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 b6 5. Nc7 Qxc7 6. d4 Nh6 7. h3 Ng4 8. hxg4 h5 9. Ba6 g5 10. g4 f5 11. gxh5 Rh2 12. Rxh2 g4 13. f3 Kf7 14. Bc8 f4 15. fxg4 f3 16. Kf2 Be7 17. Bg5 Bb4 18. c3 Bd6 19. e5 Kg6 20. Qc2 Kh5 21. Qh7 - Oct 25 00:12 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Bd6 19. e5 Kg6 20. Qc2 Kh5
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 b6 5. Nc7 Qxc7 6. d4 Nh6 7. h3 Ng4 8. hxg4 h5 9. Ba6 g5 10. g4 f5 11. gxh5 Rh2 12. Rxh2 g4 13. f3 Kf7 14. Bc8 f4 15. fxg4 f3 16. Kf2 Be7 17. Bg5 Bb4 18. c3 Bd6 19. e5 Kg6 20. Qc2 Kh5 - Oct 25 00:12 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 18. c3 Bd6 19. e5 Kg6 20. Qc2
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 b6 5. Nc7 Qxc7 6. d4 Nh6 7. h3 Ng4 8. hxg4 h5 9. Ba6 g5 10. g4 f5 11. gxh5 Rh2 12. Rxh2 g4 13. f3 Kf7 14. Bc8 f4 15. fxg4 f3 16. Kf2 Be7 17. Bg5 Bb4 18. c3 Bd6 19. e5 Kg6 20. Qc2 - Oct 25 00:12 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Bb4 18. c3 Bd6 19. e5 Kg6
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 b6 5. Nc7 Qxc7 6. d4 Nh6 7. h3 Ng4 8. hxg4 h5 9. Ba6 g5 10. g4 f5 11. gxh5 Rh2 12. Rxh2 g4 13. f3 Kf7 14. Bc8 f4 15. fxg4 f3 16. Kf2 Be7 17. Bg5 Bb4 18. c3 Bd6 19. e5 Kg6 - Oct 25 00:12 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 17. Bg5 Bb4 18. c3 Bd6 19. e5
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 b6 5. Nc7 Qxc7 6. d4 Nh6 7. h3 Ng4 8. hxg4 h5 9. Ba6 g5 10. g4 f5 11. gxh5 Rh2 12. Rxh2 g4 13. f3 Kf7 14. Bc8 f4 15. fxg4 f3 16. Kf2 Be7 17. Bg5 Bb4 18. c3 Bd6 19. e5 - Oct 25 00:12 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Be7 17. Bg5 Bb4 18. c3 Bd6
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 b6 5. Nc7 Qxc7 6. d4 Nh6 7. h3 Ng4 8. hxg4 h5 9. Ba6 g5 10. g4 f5 11. gxh5 Rh2 12. Rxh2 g4 13. f3 Kf7 14. Bc8 f4 15. fxg4 f3 16. Kf2 Be7 17. Bg5 Bb4 18. c3 Bd6