80.8M
positions
15.6M
practically solved
293.93T
engine nodes
2.2M
analyses
2,232
in queue
14
active workers
66
active cores
5.6M
nodes / sec
34.5
positions / min
82
proof number
4,106
disproof number
Root conquest: 0/20 first moves solved · 19.3% of tree positions solved · last 24h: 69,386 closures, 4.12T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 over 221 open obligations, of which 41 (18.6%) 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 24.5m (median of 4) · measured at 2026-10-10 20:00 UTC
Closures by source, last 24h (69386 of 69386 labelled): USER 100.0% (69353) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.0% (33) · last 7d (1655228 of 1655228): USER 99.0% (1639189) · FILL 0.1% (2071) · AUTO 0.7% (11952) · SOLVE 0.0% (0) · NONE 0.1% (2016). 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 c6 … O-O 14. Be7 Kh8 15. bxa5 Rb8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 c6 … O-O 14. Be7 Kh8 15. bxa5 Kg7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. Nc3 c6 … O-O 14. Be7 Kh8 15. bxa5 Rf4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. Nc3 c6 … O-O 14. Be7 Kh8 15. bxa5 Re8 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 c6 … O-O 14. Be7 Kh8 15. bxa5 Rd8 (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 | 1099 | 2 | |
| g1h3 | unsolved | 821 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| e2e4 | unsolved | 400 | 2 | |
| d2d4 | unsolved | 387 | 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 32.7% of the fleet | 1.35T | 9,291 |
| 2 | BManBJ 31.4% of the fleet | 1.29T | 6,328 |
| 3 | randomchampgamer 16.2% of the fleet | 666.42B | 2,915 |
| 4 | RickEdinson 10.4% of the fleet | 426.33B | 1,882 |
| 5 | MoNiKaMaDnEsS 9.3% of the fleet | 383.23B | 1,671 |
| 6 | soothdest <0.1% of the fleet | 25.3M | 4 |
6 accounts · 4.12T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 30.7% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 15.5% of the fleet | 45.61T | 316,158 |
| 3 | tenzink 14.6% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.7% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 5.9% of the fleet | 17.49T | 126,354 |
| 6 | RickEdinson 3.9% of the fleet | 11.61T | 76,457 |
| 7 | Torom 3.5% of the fleet | 10.36T | 76,024 |
| 8 | JackIV 3.4% of the fleet | 10.06T | 67,859 |
| 9 | gannet 2.5% of the fleet | 7.24T | 46,848 |
| 10 | MoNiKaMaDnEsS 2.3% of the fleet | 6.69T | 44,341 |
and 25 more.
35 accounts · 294.18T 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 · 17 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 10 21:00 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. e4 e6 … O-O 14. Be7 Kh8 15. bxa5 Nxd4
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. Ne5 Nh6 8. O-O fxe5 9. h3 Ba3 10. Bg5 Qa5 11. b4 Bc1 12. a4 Ng4 13. Kh1 O-O 14. Be7 Kh8 15. bxa5 Nxd4 - Oct 10 21:00 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Rf2 19. Rxf2 Kg7 20. Qe5 Kg8
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. Ne5 Nh6 8. O-O fxe5 9. h3 Ba3 10. Bg5 Qa5 11. b4 Bc1 12. a4 Ng4 13. Kh1 O-O 14. Be7 Kh8 15. bxa5 Nxd4 16. Qd6 Ba3 17. Rxa3 Ne3 18. fxe3 Rf2 19. Rxf2 Kg7 20. Qe5 Kg8 - Oct 10 21:00 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 18. fxe3 Rf2 19. Rxf2 Kg7 20. Qe5
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. Ne5 Nh6 8. O-O fxe5 9. h3 Ba3 10. Bg5 Qa5 11. b4 Bc1 12. a4 Ng4 13. Kh1 O-O 14. Be7 Kh8 15. bxa5 Nxd4 16. Qd6 Ba3 17. Rxa3 Ne3 18. fxe3 Rf2 19. Rxf2 Kg7 20. Qe5 - Oct 10 21:00 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Ne3 18. fxe3 Rf2 19. Rxf2 Kg7
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. Ne5 Nh6 8. O-O fxe5 9. h3 Ba3 10. Bg5 Qa5 11. b4 Bc1 12. a4 Ng4 13. Kh1 O-O 14. Be7 Kh8 15. bxa5 Nxd4 16. Qd6 Ba3 17. Rxa3 Ne3 18. fxe3 Rf2 19. Rxf2 Kg7 - Oct 10 21:00 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 17. Rxa3 Ne3 18. fxe3 Rf2 19. Rxf2
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. Ne5 Nh6 8. O-O fxe5 9. h3 Ba3 10. Bg5 Qa5 11. b4 Bc1 12. a4 Ng4 13. Kh1 O-O 14. Be7 Kh8 15. bxa5 Nxd4 16. Qd6 Ba3 17. Rxa3 Ne3 18. fxe3 Rf2 19. Rxf2 - Oct 10 21:00 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Ba3 17. Rxa3 Ne3 18. fxe3 Rf2
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. Ne5 Nh6 8. O-O fxe5 9. h3 Ba3 10. Bg5 Qa5 11. b4 Bc1 12. a4 Ng4 13. Kh1 O-O 14. Be7 Kh8 15. bxa5 Nxd4 16. Qd6 Ba3 17. Rxa3 Ne3 18. fxe3 Rf2 - Oct 10 21:00 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 16. Qd6 Ba3 17. Rxa3 Ne3 18. fxe3
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. Ne5 Nh6 8. O-O fxe5 9. h3 Ba3 10. Bg5 Qa5 11. b4 Bc1 12. a4 Ng4 13. Kh1 O-O 14. Be7 Kh8 15. bxa5 Nxd4 16. Qd6 Ba3 17. Rxa3 Ne3 18. fxe3 - Oct 10 21:00 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Nxd4 16. Qd6 Ba3 17. Rxa3 Ne3
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. Ne5 Nh6 8. O-O fxe5 9. h3 Ba3 10. Bg5 Qa5 11. b4 Bc1 12. a4 Ng4 13. Kh1 O-O 14. Be7 Kh8 15. bxa5 Nxd4 16. Qd6 Ba3 17. Rxa3 Ne3 - Oct 10 21:00 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 15. bxa5 Nxd4 16. Qd6 Ba3 17. Rxa3
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. Ne5 Nh6 8. O-O fxe5 9. h3 Ba3 10. Bg5 Qa5 11. b4 Bc1 12. a4 Ng4 13. Kh1 O-O 14. Be7 Kh8 15. bxa5 Nxd4 16. Qd6 Ba3 17. Rxa3 - Oct 10 21:00 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Kh8 15. bxa5 Nxd4 16. Qd6 Ba3
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. Ne5 Nh6 8. O-O fxe5 9. h3 Ba3 10. Bg5 Qa5 11. b4 Bc1 12. a4 Ng4 13. Kh1 O-O 14. Be7 Kh8 15. bxa5 Nxd4 16. Qd6 Ba3 - Oct 10 21:00 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 14. Be7 Kh8 15. bxa5 Nxd4 16. Qd6
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. Ne5 Nh6 8. O-O fxe5 9. h3 Ba3 10. Bg5 Qa5 11. b4 Bc1 12. a4 Ng4 13. Kh1 O-O 14. Be7 Kh8 15. bxa5 Nxd4 16. Qd6 - Oct 10 21:00 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. e4 e6 … a5 27. b3 Kh8 28. Re5 Rg8
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 h5 7. c3 Nh6 8. Ne5 fxe5 9. Bg5 Qf6 10. f4 Ng4 11. f5 Qxg5 12. Qxh5 g5 13. Rf1 e5 14. dxe5 d6 15. O-O-O d5 16. e5 g4 17. Rxd5 Kf7 18. Bc4 Kg7 19. f6 Kh7 20. e6 Bh6 21. Kb1 Bd2 22. f7 Bxe6 23. Bb5 Rhf8 24. Rf5 b6 25. c4 Bg5 26. Bd7 a5 27. b3 Kh8 28. Re5 Rg8