79.9M
positions
15.4M
practically solved
288.59T
engine nodes
2.2M
analyses
4,226
in queue
15
active workers
74
active cores
17.0M
nodes / sec
36.4
positions / min
82
proof number
4,106
disproof number
Root conquest: 0/20 first moves solved · 19.3% of tree positions solved · last 24h: 233,415 closures, 3.72T 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 17.9m (median of 73) · measured at 2026-10-09 16:00 UTC
Closures by source, last 24h (233402 of 233402 labelled): USER 100.0% (233348) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.0% (54) · last 7d (1702094 of 1702107): USER 99.0% (1684965) · FILL 0.1% (2071) · AUTO 0.7% (11952) · SOLVE 0.0% (0) · NONE 0.2% (3106). 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. e4 c6 … 12. fxg4 Bh6 13. Bg5 O-O 14. O-O (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 Na6 … Be7 12. e4 Bf8 13. d4 d5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. Nc3 c6 … 11. a4 d6 12. b4 h5 13. bxa5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nh3 d5 2. Nc3 h6 … Ba4 18. Kd2 g5 19. h6 Ke7 (User) · 512.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Kc8 15. Ne8 Bg7 16. Nxg7 Nc5 (User) · 128.0M nodes · MoNiKaMaDnEsS-DESKTOP-VG9VPVH-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 | 1076 | 2 | |
| g1h3 | unsolved | 820 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| e2e4 | unsolved | 400 | 2 | |
| d2d4 | unsolved | 379 | 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 | BManBJ 40.5% of the fleet | 1.51T | 10,033 |
| 2 | Torom 27.2% of the fleet | 1.01T | 6,704 |
| 3 | randomchampgamer 17.8% of the fleet | 662.34B | 4,746 |
| 4 | RickEdinson 11.8% of the fleet | 440.46B | 2,742 |
| 5 | MoNiKaMaDnEsS 2.7% of the fleet | 98.83B | 595 |
| 6 | soothdest <0.1% of the fleet | 8.0M | 17 |
6 accounts · 3.72T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 31.3% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 15.3% of the fleet | 44.05T | 308,440 |
| 3 | tenzink 14.8% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.9% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 5.8% of the fleet | 16.72T | 122,608 |
| 6 | RickEdinson 3.8% of the fleet | 11.11T | 74,086 |
| 7 | JackIV 3.5% of the fleet | 10.06T | 67,859 |
| 8 | Torom 2.9% of the fleet | 8.24T | 61,530 |
| 9 | gannet 2.5% of the fleet | 7.24T | 46,848 |
| 10 | MoNiKaMaDnEsS 2.2% of the fleet | 6.28T | 42,483 |
and 25 more.
35 accounts · 288.83T 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 · 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 22 proposals · see every proposal
Milestones
- Oct 09 16:53 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … Kc8 15. Ne8 Bg7 16. Nxg7 e5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bh3 7. Nc3 e6 8. Nd5 Na6 9. Nxh8 Bg4 10. f3 Bf5 11. d3 b6 12. Bg5 g6 13. Nf6 Kd8 14. O-O Kc8 15. Ne8 Bg7 16. Nxg7 e5 - Oct 09 16:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … a5 22. Rxe6 b5 23. Qd5 b4
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bh3 7. Nc3 e6 8. Nd5 Na6 9. Nxh8 Bg4 10. f3 Bf5 11. d3 b6 12. Bg5 g6 13. Nf6 Kd8 14. O-O Kc8 15. Ne8 Bg7 16. Nxg7 e5 17. g4 Bd7 18. f4 e4 19. dxe4 Be6 20. Qd4 cxb5 21. Rfe1 a5 22. Rxe6 b5 23. Qd5 b4 - Oct 09 16:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 21. Rfe1 a5 22. Rxe6 b5 23. Qd5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bh3 7. Nc3 e6 8. Nd5 Na6 9. Nxh8 Bg4 10. f3 Bf5 11. d3 b6 12. Bg5 g6 13. Nf6 Kd8 14. O-O Kc8 15. Ne8 Bg7 16. Nxg7 e5 17. g4 Bd7 18. f4 e4 19. dxe4 Be6 20. Qd4 cxb5 21. Rfe1 a5 22. Rxe6 b5 23. Qd5 - Oct 09 16:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … cxb5 21. Rfe1 a5 22. Rxe6 b5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bh3 7. Nc3 e6 8. Nd5 Na6 9. Nxh8 Bg4 10. f3 Bf5 11. d3 b6 12. Bg5 g6 13. Nf6 Kd8 14. O-O Kc8 15. Ne8 Bg7 16. Nxg7 e5 17. g4 Bd7 18. f4 e4 19. dxe4 Be6 20. Qd4 cxb5 21. Rfe1 a5 22. Rxe6 b5 - Oct 09 16:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 20. Qd4 cxb5 21. Rfe1 a5 22. Rxe6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bh3 7. Nc3 e6 8. Nd5 Na6 9. Nxh8 Bg4 10. f3 Bf5 11. d3 b6 12. Bg5 g6 13. Nf6 Kd8 14. O-O Kc8 15. Ne8 Bg7 16. Nxg7 e5 17. g4 Bd7 18. f4 e4 19. dxe4 Be6 20. Qd4 cxb5 21. Rfe1 a5 22. Rxe6 - Oct 09 16:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Be6 20. Qd4 cxb5 21. Rfe1 a5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bh3 7. Nc3 e6 8. Nd5 Na6 9. Nxh8 Bg4 10. f3 Bf5 11. d3 b6 12. Bg5 g6 13. Nf6 Kd8 14. O-O Kc8 15. Ne8 Bg7 16. Nxg7 e5 17. g4 Bd7 18. f4 e4 19. dxe4 Be6 20. Qd4 cxb5 21. Rfe1 a5 - Oct 09 16:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 19. dxe4 Be6 20. Qd4 cxb5 21. Rfe1
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bh3 7. Nc3 e6 8. Nd5 Na6 9. Nxh8 Bg4 10. f3 Bf5 11. d3 b6 12. Bg5 g6 13. Nf6 Kd8 14. O-O Kc8 15. Ne8 Bg7 16. Nxg7 e5 17. g4 Bd7 18. f4 e4 19. dxe4 Be6 20. Qd4 cxb5 21. Rfe1 - Oct 09 16:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … e4 19. dxe4 Be6 20. Qd4 cxb5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bh3 7. Nc3 e6 8. Nd5 Na6 9. Nxh8 Bg4 10. f3 Bf5 11. d3 b6 12. Bg5 g6 13. Nf6 Kd8 14. O-O Kc8 15. Ne8 Bg7 16. Nxg7 e5 17. g4 Bd7 18. f4 e4 19. dxe4 Be6 20. Qd4 cxb5 - Oct 09 16:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 18. f4 e4 19. dxe4 Be6 20. Qd4
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bh3 7. Nc3 e6 8. Nd5 Na6 9. Nxh8 Bg4 10. f3 Bf5 11. d3 b6 12. Bg5 g6 13. Nf6 Kd8 14. O-O Kc8 15. Ne8 Bg7 16. Nxg7 e5 17. g4 Bd7 18. f4 e4 19. dxe4 Be6 20. Qd4 - Oct 09 16:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Bd7 18. f4 e4 19. dxe4 Be6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bh3 7. Nc3 e6 8. Nd5 Na6 9. Nxh8 Bg4 10. f3 Bf5 11. d3 b6 12. Bg5 g6 13. Nf6 Kd8 14. O-O Kc8 15. Ne8 Bg7 16. Nxg7 e5 17. g4 Bd7 18. f4 e4 19. dxe4 Be6 - Oct 09 16:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 17. g4 Bd7 18. f4 e4 19. dxe4
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bh3 7. Nc3 e6 8. Nd5 Na6 9. Nxh8 Bg4 10. f3 Bf5 11. d3 b6 12. Bg5 g6 13. Nf6 Kd8 14. O-O Kc8 15. Ne8 Bg7 16. Nxg7 e5 17. g4 Bd7 18. f4 e4 19. dxe4 - Oct 09 16:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … e5 17. g4 Bd7 18. f4 e4
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bh3 7. Nc3 e6 8. Nd5 Na6 9. Nxh8 Bg4 10. f3 Bf5 11. d3 b6 12. Bg5 g6 13. Nf6 Kd8 14. O-O Kc8 15. Ne8 Bg7 16. Nxg7 e5 17. g4 Bd7 18. f4 e4