68.8M
positions
12.4M
practically solved
247.38T
engine nodes
1.9M
analyses
4,840
in queue
17
active workers
120
active cores
23.7M
nodes / sec
35.5
positions / min
57
proof number
3,808
disproof number
Root conquest: 0/20 first moves solved · 18.1% of tree positions solved · last 24h: 383,307 closures, 6.98T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 81 over 199 open obligations, of which 32 (16.1%) 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 19.0m (median of 123) · measured at 2026-09-30 09:00 UTC
Closures by source, last 24h (383307 of 383307 labelled): USER 99.9% (383093) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.1% (214) · last 7d (2120833 of 2120833): USER 97.9% (2077231) · FILL 0.4% (8795) · AUTO 1.5% (32065) · SOLVE 0.0% (0) · NONE 0.1% (2742). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nh3 e6 2. e3 g6 … 19. axb4 Kg8 20. Ne6 Nc5 21. Ba3 (User) · 128.0M nodes · auranvesdranor-admin-835912-atomicdb
- 1. Nh3 e6 2. e3 g6 … 19. axb4 Kg8 20. Ne6 Nc5 21. Bd2 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … 12. Bb5 Ng7 13. Qe2 Kh8 14. Bd7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Ng7 13. Qe2 Rd8 14. Be8 Kh8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … Ng7 13. Qe2 Rd8 14. Be8 g5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
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 | 1003 | 2 | |
| g1h3 | unsolved | 745 | 2 | |
| e2e3 | unsolved | 453 | 3 | |
| d2d4 | unsolved | 437 | 2 | |
| e2e4 | unsolved | 407 | 2 | |
| b1c3 | unsolved | 142 | 2 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b2b4 | unsolved | 0 | 3 | |
| b1a3 | unsolved | 0 | 3 | |
| h2h3 | unsolved | -98 | 2 | |
| a2a3 | unsolved | -103 | 2 | |
| d2d3 | unsolved | -116 | 2 | |
| f2f3 | unsolved | -117 | 3 | |
| b2b3 | unsolved | -169 | 1 | |
| f2f4 | unsolved | -302 | 3 | |
| h2h4 | unsolved | -500 | 2 | |
| a2a4 | unsolved | -510 | 2 | |
| g2g4 | unsolved | -600 | 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 | gannet 40.0% of the fleet | 2.80T | 20,663 |
| 2 | BManBJ 21.0% of the fleet | 1.46T | 11,238 |
| 3 | auranvesdranor 14.6% of the fleet | 1.02T | 7,784 |
| 4 | tenzink 8.8% of the fleet | 616.21B | 4,467 |
| 5 | randomchampgamer 8.4% of the fleet | 584.88B | 4,672 |
| 6 | RickEdinson 4.0% of the fleet | 276.93B | 1,896 |
| 7 | MoNiKaMaDnEsS 3.3% of the fleet | 227.56B | 1,709 |
| 8 | soothdest <0.1% of the fleet | 1.31B | 21 |
8 accounts · 6.98T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 36.5% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.3% of the fleet | 37.81T | 314,817 |
| 3 | BManBJ 12.2% of the fleet | 30.32T | 210,871 |
| 4 | auranvesdranor 11.7% of the fleet | 28.85T | 208,570 |
| 5 | randomchampgamer 4.3% of the fleet | 10.64T | 78,466 |
| 6 | JackIV 4.1% of the fleet | 10.06T | 67,859 |
| 7 | RickEdinson 2.8% of the fleet | 6.96T | 46,195 |
| 8 | MoNiKaMaDnEsS 1.8% of the fleet | 4.52T | 29,480 |
| 9 | gannet 1.7% of the fleet | 4.29T | 24,225 |
| 10 | NeoArcturus 1.7% of the fleet | 4.09T | 16,758 |
and 25 more.
35 accounts · 247.61T 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 · 16 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
- Refuting 1... d61. Nf3 d6 2. Nc3proposed by randomchampgamer · 3 votes
- The weaker of the two f-pawn advances for 1. ...d61. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4proposed by MoNiKaMaDnEsS · 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
- Is Nh3 h6 e3 e6 Nc3 a draw?1. Nh3 e6 2. e3 h6 3. Nc3proposed by soothdest · 3 votes
Showing the 6 most voted of 21 proposals · see every proposal
Milestones
- Sep 30 09:57 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … Ra6 26. Rf7 Kg8 27. Rf8 Kh7
1. Nh3 d5 2. Nc3 h6 3. d4 e6 4. Ne4 a6 5. Neg5 hxg5 6. Ng5 f5 7. e4 fxe4 8. h4 Nh6 9. Nh7 Bd6 10. g4 Bf4 11. Bxf4 c5 12. f4 e5 13. Nf8 c4 14. Qe2 e4 15. b4 e3 16. Nd7 Nc6 17. c3 Nf7 18. Bg2 Ng5 19. hxg5 a5 20. Qc2 g6 21. g5 e2 22. Bh3 b5 23. Nf6 Qxf6 24. Bd7 Kf8 25. Rh7 Ra6 26. Rf7 Kg8 27. Rf8 Kh7 - Sep 30 09:57 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … 25. Rh7 Ra6 26. Rf7 Kg8 27. Rf8
1. Nh3 d5 2. Nc3 h6 3. d4 e6 4. Ne4 a6 5. Neg5 hxg5 6. Ng5 f5 7. e4 fxe4 8. h4 Nh6 9. Nh7 Bd6 10. g4 Bf4 11. Bxf4 c5 12. f4 e5 13. Nf8 c4 14. Qe2 e4 15. b4 e3 16. Nd7 Nc6 17. c3 Nf7 18. Bg2 Ng5 19. hxg5 a5 20. Qc2 g6 21. g5 e2 22. Bh3 b5 23. Nf6 Qxf6 24. Bd7 Kf8 25. Rh7 Ra6 26. Rf7 Kg8 27. Rf8 - Sep 30 09:57 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … Kf8 25. Rh7 Ra6 26. Rf7 Kg8
1. Nh3 d5 2. Nc3 h6 3. d4 e6 4. Ne4 a6 5. Neg5 hxg5 6. Ng5 f5 7. e4 fxe4 8. h4 Nh6 9. Nh7 Bd6 10. g4 Bf4 11. Bxf4 c5 12. f4 e5 13. Nf8 c4 14. Qe2 e4 15. b4 e3 16. Nd7 Nc6 17. c3 Nf7 18. Bg2 Ng5 19. hxg5 a5 20. Qc2 g6 21. g5 e2 22. Bh3 b5 23. Nf6 Qxf6 24. Bd7 Kf8 25. Rh7 Ra6 26. Rf7 Kg8 - Sep 30 09:57 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … 24. Bd7 Kf8 25. Rh7 Ra6 26. Rf7
1. Nh3 d5 2. Nc3 h6 3. d4 e6 4. Ne4 a6 5. Neg5 hxg5 6. Ng5 f5 7. e4 fxe4 8. h4 Nh6 9. Nh7 Bd6 10. g4 Bf4 11. Bxf4 c5 12. f4 e5 13. Nf8 c4 14. Qe2 e4 15. b4 e3 16. Nd7 Nc6 17. c3 Nf7 18. Bg2 Ng5 19. hxg5 a5 20. Qc2 g6 21. g5 e2 22. Bh3 b5 23. Nf6 Qxf6 24. Bd7 Kf8 25. Rh7 Ra6 26. Rf7 - Sep 30 09:57 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … Qxf6 24. Bd7 Kf8 25. Rh7 Ra6
1. Nh3 d5 2. Nc3 h6 3. d4 e6 4. Ne4 a6 5. Neg5 hxg5 6. Ng5 f5 7. e4 fxe4 8. h4 Nh6 9. Nh7 Bd6 10. g4 Bf4 11. Bxf4 c5 12. f4 e5 13. Nf8 c4 14. Qe2 e4 15. b4 e3 16. Nd7 Nc6 17. c3 Nf7 18. Bg2 Ng5 19. hxg5 a5 20. Qc2 g6 21. g5 e2 22. Bh3 b5 23. Nf6 Qxf6 24. Bd7 Kf8 25. Rh7 Ra6 - Sep 30 09:57 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … Ba6 26. Rf7 Kg8 27. Rf8 Kh7
1. Nh3 d5 2. Nc3 h6 3. d4 e6 4. Ne4 a6 5. Neg5 hxg5 6. Ng5 f5 7. e4 fxe4 8. h4 Nh6 9. Nh7 Bd6 10. g4 Bf4 11. Bxf4 c5 12. f4 e5 13. Nf8 c4 14. Qe2 e4 15. b4 e3 16. Nd7 Nc6 17. c3 Nf7 18. Bg2 Ng5 19. hxg5 a5 20. Qc2 g6 21. g5 e2 22. Bh3 b5 23. Nf6 Qxf6 24. Bd7 Kf8 25. Rh7 Ba6 26. Rf7 Kg8 27. Rf8 Kh7 - Sep 30 09:57 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … 25. Rh7 Ba6 26. Rf7 Kg8 27. Rf8
1. Nh3 d5 2. Nc3 h6 3. d4 e6 4. Ne4 a6 5. Neg5 hxg5 6. Ng5 f5 7. e4 fxe4 8. h4 Nh6 9. Nh7 Bd6 10. g4 Bf4 11. Bxf4 c5 12. f4 e5 13. Nf8 c4 14. Qe2 e4 15. b4 e3 16. Nd7 Nc6 17. c3 Nf7 18. Bg2 Ng5 19. hxg5 a5 20. Qc2 g6 21. g5 e2 22. Bh3 b5 23. Nf6 Qxf6 24. Bd7 Kf8 25. Rh7 Ba6 26. Rf7 Kg8 27. Rf8 - Sep 30 09:57 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … Kf8 25. Rh7 Ba6 26. Rf7 Kg8
1. Nh3 d5 2. Nc3 h6 3. d4 e6 4. Ne4 a6 5. Neg5 hxg5 6. Ng5 f5 7. e4 fxe4 8. h4 Nh6 9. Nh7 Bd6 10. g4 Bf4 11. Bxf4 c5 12. f4 e5 13. Nf8 c4 14. Qe2 e4 15. b4 e3 16. Nd7 Nc6 17. c3 Nf7 18. Bg2 Ng5 19. hxg5 a5 20. Qc2 g6 21. g5 e2 22. Bh3 b5 23. Nf6 Qxf6 24. Bd7 Kf8 25. Rh7 Ba6 26. Rf7 Kg8 - Sep 30 09:57 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … 24. Bd7 Kf8 25. Rh7 Ba6 26. Rf7
1. Nh3 d5 2. Nc3 h6 3. d4 e6 4. Ne4 a6 5. Neg5 hxg5 6. Ng5 f5 7. e4 fxe4 8. h4 Nh6 9. Nh7 Bd6 10. g4 Bf4 11. Bxf4 c5 12. f4 e5 13. Nf8 c4 14. Qe2 e4 15. b4 e3 16. Nd7 Nc6 17. c3 Nf7 18. Bg2 Ng5 19. hxg5 a5 20. Qc2 g6 21. g5 e2 22. Bh3 b5 23. Nf6 Qxf6 24. Bd7 Kf8 25. Rh7 Ba6 26. Rf7 - Sep 30 09:57 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … Qxf6 24. Bd7 Kf8 25. Rh7 Ba6
1. Nh3 d5 2. Nc3 h6 3. d4 e6 4. Ne4 a6 5. Neg5 hxg5 6. Ng5 f5 7. e4 fxe4 8. h4 Nh6 9. Nh7 Bd6 10. g4 Bf4 11. Bxf4 c5 12. f4 e5 13. Nf8 c4 14. Qe2 e4 15. b4 e3 16. Nd7 Nc6 17. c3 Nf7 18. Bg2 Ng5 19. hxg5 a5 20. Qc2 g6 21. g5 e2 22. Bh3 b5 23. Nf6 Qxf6 24. Bd7 Kf8 25. Rh7 Ba6 - Sep 30 09:57 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … Ra7 26. Rf7 Kg8 27. Rf8 Kh7
1. Nh3 d5 2. Nc3 h6 3. d4 e6 4. Ne4 a6 5. Neg5 hxg5 6. Ng5 f5 7. e4 fxe4 8. h4 Nh6 9. Nh7 Bd6 10. g4 Bf4 11. Bxf4 c5 12. f4 e5 13. Nf8 c4 14. Qe2 e4 15. b4 e3 16. Nd7 Nc6 17. c3 Nf7 18. Bg2 Ng5 19. hxg5 a5 20. Qc2 g6 21. g5 e2 22. Bh3 b5 23. Nf6 Qxf6 24. Bd7 Kf8 25. Rh7 Ra7 26. Rf7 Kg8 27. Rf8 Kh7 - Sep 30 09:57 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … 25. Rh7 Ra7 26. Rf7 Kg8 27. Rf8
1. Nh3 d5 2. Nc3 h6 3. d4 e6 4. Ne4 a6 5. Neg5 hxg5 6. Ng5 f5 7. e4 fxe4 8. h4 Nh6 9. Nh7 Bd6 10. g4 Bf4 11. Bxf4 c5 12. f4 e5 13. Nf8 c4 14. Qe2 e4 15. b4 e3 16. Nd7 Nc6 17. c3 Nf7 18. Bg2 Ng5 19. hxg5 a5 20. Qc2 g6 21. g5 e2 22. Bh3 b5 23. Nf6 Qxf6 24. Bd7 Kf8 25. Rh7 Ra7 26. Rf7 Kg8 27. Rf8