80.5M
positions
15.5M
practically solved
291.70T
engine nodes
2.2M
analyses
1,814
in queue
7
active workers
42
active cores
14.0M
nodes / sec
11.7
positions / min
82
proof number
4,106
disproof number
Root conquest: 0/20 first moves solved · 19.3% of tree positions solved · last 24h: 217,596 closures, 4.68T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 over 219 open obligations, of which 41 (18.7%) 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 1.8d (median of 20) · measured at 2026-10-10 09:00 UTC
Closures by source, last 24h (217596 of 217596 labelled): USER 100.0% (217537) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.0% (59) · last 7d (1665859 of 1665859): USER 99.0% (1649421) · FILL 0.1% (2071) · AUTO 0.7% (11952) · SOLVE 0.0% (0) · NONE 0.1% (2415). 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 … f5 14. g3 f4 15. d4 Na5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 c6 … f5 14. g3 f4 15. d4 Nxd4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. Nc3 c6 … f5 14. g3 f4 15. d4 Nxe5 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 Nh6 … e6 5. e4 g6 6. Ng5 Bb4 (User) · 10.00B 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 | 1001 | 2 | |
| g1h3 | unsolved | 820 | 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 40.3% of the fleet | 1.89T | 12,733 |
| 2 | BManBJ 29.5% of the fleet | 1.38T | 7,614 |
| 3 | randomchampgamer 14.7% of the fleet | 688.37B | 4,040 |
| 4 | RickEdinson 9.3% of the fleet | 434.62B | 2,353 |
| 5 | MoNiKaMaDnEsS 6.2% of the fleet | 291.28B | 1,503 |
| 6 | soothdest <0.1% of the fleet | 8.0M | 17 |
6 accounts · 4.68T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 30.9% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 15.4% of the fleet | 45.00T | 313,230 |
| 3 | tenzink 14.7% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.8% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 5.9% of the fleet | 17.20T | 125,309 |
| 6 | RickEdinson 3.9% of the fleet | 11.42T | 75,660 |
| 7 | JackIV 3.4% of the fleet | 10.06T | 67,859 |
| 8 | Torom 3.2% of the fleet | 9.26T | 68,482 |
| 9 | gannet 2.5% of the fleet | 7.24T | 46,848 |
| 10 | MoNiKaMaDnEsS 2.2% of the fleet | 6.49T | 43,511 |
and 25 more.
35 accounts · 291.80T 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 10 09:56 Solved: BLACK_WIN via MINIMAXview
1. Nf3 f6 2. e4 e6 … 14. g3 d5 15. d4 f4 16. Kh2
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O Bd6 7. e5 Bb4 8. h3 Nh6 9. c3 Ng4 10. Kh1 O-O 11. Ng5 h6 12. Nh7 Kh8 13. hxg4 f5 14. g3 d5 15. d4 f4 16. Kh2 - Oct 10 09:56 Solved: BLACK_WIN via MINIMAXview
1. Nf3 f6 2. e4 e6 … 14. g3 d5 15. d4 f4 16. Kg2
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O Bd6 7. e5 Bb4 8. h3 Nh6 9. c3 Ng4 10. Kh1 O-O 11. Ng5 h6 12. Nh7 Kh8 13. hxg4 f5 14. g3 d5 15. d4 f4 16. Kg2 - Oct 10 09:56 Solved: BLACK_WIN via MINIMAXview
1. Nf3 f6 2. e4 e6 … 14. g3 d5 15. d4 f4 16. Kg1
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O Bd6 7. e5 Bb4 8. h3 Nh6 9. c3 Ng4 10. Kh1 O-O 11. Ng5 h6 12. Nh7 Kh8 13. hxg4 f5 14. g3 d5 15. d4 f4 16. Kg1 - Oct 10 09:56 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 20. Rf8 Bxf8 21. Kg2 Qf2 22. Kh3
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O Bd6 7. e5 Bb4 8. h3 Nh6 9. c3 Ng4 10. Kh1 O-O 11. Ng5 h6 12. Nh7 Kh8 13. hxg4 f5 14. g3 d5 15. d4 f4 16. Kg1 fxg3 17. f4 Qh4 18. Qg4 Rxf4 19. Rf7 g6 20. Rf8 Bxf8 21. Kg2 Qf2 22. Kh3 - Oct 10 09:56 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … g6 20. Rf8 Bxf8 21. Kg2 Qf2
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O Bd6 7. e5 Bb4 8. h3 Nh6 9. c3 Ng4 10. Kh1 O-O 11. Ng5 h6 12. Nh7 Kh8 13. hxg4 f5 14. g3 d5 15. d4 f4 16. Kg1 fxg3 17. f4 Qh4 18. Qg4 Rxf4 19. Rf7 g6 20. Rf8 Bxf8 21. Kg2 Qf2 - Oct 10 09:56 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 19. Rf7 g6 20. Rf8 Bxf8 21. Kg2
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O Bd6 7. e5 Bb4 8. h3 Nh6 9. c3 Ng4 10. Kh1 O-O 11. Ng5 h6 12. Nh7 Kh8 13. hxg4 f5 14. g3 d5 15. d4 f4 16. Kg1 fxg3 17. f4 Qh4 18. Qg4 Rxf4 19. Rf7 g6 20. Rf8 Bxf8 21. Kg2 - Oct 10 09:56 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Rxf4 19. Rf7 g6 20. Rf8 Bxf8
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O Bd6 7. e5 Bb4 8. h3 Nh6 9. c3 Ng4 10. Kh1 O-O 11. Ng5 h6 12. Nh7 Kh8 13. hxg4 f5 14. g3 d5 15. d4 f4 16. Kg1 fxg3 17. f4 Qh4 18. Qg4 Rxf4 19. Rf7 g6 20. Rf8 Bxf8 - Oct 10 09:56 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 18. Qg4 Rxf4 19. Rf7 g6 20. Rf8
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O Bd6 7. e5 Bb4 8. h3 Nh6 9. c3 Ng4 10. Kh1 O-O 11. Ng5 h6 12. Nh7 Kh8 13. hxg4 f5 14. g3 d5 15. d4 f4 16. Kg1 fxg3 17. f4 Qh4 18. Qg4 Rxf4 19. Rf7 g6 20. Rf8 - Oct 10 09:56 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Qh4 18. Qg4 Rxf4 19. Rf7 g6
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O Bd6 7. e5 Bb4 8. h3 Nh6 9. c3 Ng4 10. Kh1 O-O 11. Ng5 h6 12. Nh7 Kh8 13. hxg4 f5 14. g3 d5 15. d4 f4 16. Kg1 fxg3 17. f4 Qh4 18. Qg4 Rxf4 19. Rf7 g6 - Oct 10 09:56 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 17. f4 Qh4 18. Qg4 Rxf4 19. Rf7
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O Bd6 7. e5 Bb4 8. h3 Nh6 9. c3 Ng4 10. Kh1 O-O 11. Ng5 h6 12. Nh7 Kh8 13. hxg4 f5 14. g3 d5 15. d4 f4 16. Kg1 fxg3 17. f4 Qh4 18. Qg4 Rxf4 19. Rf7 - Oct 10 09:56 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … fxg3 17. f4 Qh4 18. Qg4 Rxf4
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O Bd6 7. e5 Bb4 8. h3 Nh6 9. c3 Ng4 10. Kh1 O-O 11. Ng5 h6 12. Nh7 Kh8 13. hxg4 f5 14. g3 d5 15. d4 f4 16. Kg1 fxg3 17. f4 Qh4 18. Qg4 Rxf4 - Oct 10 09:56 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 16. Kg1 fxg3 17. f4 Qh4 18. Qg4
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O Bd6 7. e5 Bb4 8. h3 Nh6 9. c3 Ng4 10. Kh1 O-O 11. Ng5 h6 12. Nh7 Kh8 13. hxg4 f5 14. g3 d5 15. d4 f4 16. Kg1 fxg3 17. f4 Qh4 18. Qg4