85.0M
positions
16.2M
practically solved
311.67T
engine nodes
2.4M
analyses
2
in queue
6
active workers
36
active cores
9.3M
nodes / sec
6.4
positions / min
139
proof number
4,766
disproof number
Root conquest: 0/20 first moves solved · 19.1% of tree positions solved · last 24h: 142,790 closures, 2.60T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 over 211 open obligations, of which 40 (19.0%) 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 59.9m (median of 2) · measured at 2026-10-16 06:00 UTC
Closures by source, last 24h (142790 of 142790 labelled): USER 79.7% (113874) · FILL 1.8% (2605) · AUTO 18.4% (26249) · SOLVE 0.0% (0) · NONE 0.0% (62) · last 7d (871929 of 871929): USER 93.2% (812298) · FILL 0.6% (5356) · AUTO 6.2% (53788) · SOLVE 0.0% (0) · NONE 0.1% (487). 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. Ne5 fxe5 … Qa5 10. c3 e6 11. g4 h6 (Fill) · 2.00B nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … 19. axb5 O-O 20. Kh1 Bf2 21. f5 (Auto) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. e4 e6 … 13. d4 b6 14. Bd2 g4 15. a6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. e4 e6 … Bd2 19. axb5 O-O 20. Ra6 d6 (Fill) · 2.00B nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … 21. Ra6 Be1 22. Kh1 Bf2 23. g3 (Fill) · 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 | 1070 | 2 | |
| g1h3 | unsolved | 763 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 400 | 2 | |
| e2e4 | unsolved | 400 | 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 | BManBJ 54.0% of the fleet | 1.40T | 13,689 |
| 2 | RickEdinson 16.4% of the fleet | 425.48B | 4,021 |
| 3 | MoNiKaMaDnEsS 15.6% of the fleet | 405.75B | 3,555 |
| 4 | randomchampgamer 14.0% of the fleet | 362.85B | 2,979 |
| 5 | NeoArcturus <0.1% of the fleet | 144.9M | 4 |
5 accounts · 2.60T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 29.0% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 16.6% of the fleet | 51.79T | 363,614 |
| 3 | tenzink 13.7% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.1% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 6.4% of the fleet | 19.85T | 140,897 |
| 6 | Torom 5.0% of the fleet | 15.70T | 113,354 |
| 7 | RickEdinson 4.4% of the fleet | 13.83T | 92,391 |
| 8 | JackIV 3.2% of the fleet | 10.06T | 67,859 |
| 9 | MoNiKaMaDnEsS 2.6% of the fleet | 8.14T | 55,167 |
| 10 | gannet 2.3% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 311.73T 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 16 06:38 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … b6 14. Bd2 g4 15. Ne5 b5
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O g6 7. h3 a6 8. Kh1 axb5 9. Qe2 Qa5 10. Qc4 Qc5 11. a4 Qxc4 12. a5 g5 13. d4 b6 14. Bd2 g4 15. Ne5 b5 - Oct 16 06:38 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … b6 14. Bd2 g4 15. Ne5 g3
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O g6 7. h3 a6 8. Kh1 axb5 9. Qe2 Qa5 10. Qc4 Qc5 11. a4 Qxc4 12. a5 g5 13. d4 b6 14. Bd2 g4 15. Ne5 g3 - Oct 16 06:37 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 21. g3 h4 22. Ra6 Bf2 23. Kg2
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. O-O axb5 8. h3 h5 9. Qd3 b5 10. Qc3 Qc7 11. Ne5 Ba6 12. Qa5 fxe5 13. Bf4 e5 14. Bg5 Bb4 15. Qb6 Nf6 16. f4 exd4 17. a4 Qa7 18. Qxa6 Be1 19. axb5 O-O 20. f5 Rfc8 21. g3 h4 22. Ra6 Bf2 23. Kg2 - Oct 16 06:37 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 21. g3 h4 22. Ra6 Bf2 23. Kh2
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. O-O axb5 8. h3 h5 9. Qd3 b5 10. Qc3 Qc7 11. Ne5 Ba6 12. Qa5 fxe5 13. Bf4 e5 14. Bg5 Bb4 15. Qb6 Nf6 16. f4 exd4 17. a4 Qa7 18. Qxa6 Be1 19. axb5 O-O 20. f5 Rfc8 21. g3 h4 22. Ra6 Bf2 23. Kh2 - Oct 16 06:36 VALUE_CASCADEview
1. Nf3 f6 2. e4 e6 … Be1 19. axb5 O-O 20. f5 Rae8
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. O-O axb5 8. h3 h5 9. Qd3 b5 10. Qc3 Qc7 11. Ne5 Ba6 12. Qa5 fxe5 13. Bf4 e5 14. Bg5 Bb4 15. Qb6 Nf6 16. f4 exd4 17. a4 Qa7 18. Qxa6 Be1 19. axb5 O-O 20. f5 Rae8 - Oct 16 06:34 Solved: BLACK_WIN via MINIMAXview
1. Nh3 f6 2. e4 d6 … 11. Kf2 Bd5 12. Qe2 cxb4 13. h3
1. Nh3 f6 2. e4 d6 3. Nc3 c6 4. Ng5 Bd7 5. Nxh7 Qa5 6. f3 Bg4 7. Bb5 Be6 8. Ba6 Qg5 9. b4 c5 10. Rg1 Qg4 11. Kf2 Bd5 12. Qe2 cxb4 13. h3 - Oct 16 06:32 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 17. hxg4 g5 18. Rae1 Bh3 19. b3
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 a6 8. O-O axb5 9. Kh1 Qc7 10. Bf4 Qc4 11. d5 Nh6 12. dxe6 d6 13. Qd4 b6 14. Qc5 Qxc5 15. Nd4 Ng4 16. Bh6 Bxh6 17. hxg4 g5 18. Rae1 Bh3 19. b3 - Oct 16 06:32 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 17. hxg4 g5 18. Rae1 Bh3 19. a3
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 a6 8. O-O axb5 9. Kh1 Qc7 10. Bf4 Qc4 11. d5 Nh6 12. dxe6 d6 13. Qd4 b6 14. Qc5 Qxc5 15. Nd4 Ng4 16. Bh6 Bxh6 17. hxg4 g5 18. Rae1 Bh3 19. a3 - Oct 16 06:32 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 21. Rg1 hxg4 22. Kg3 Rh3 23. Kg4
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 a6 8. O-O axb5 9. Kh1 Qc7 10. Bf4 Qc4 11. d5 Nh6 12. dxe6 d6 13. Qd4 b6 14. Qc5 Qxc5 15. Nd4 Ng4 16. Bh6 Bxh6 17. hxg4 g5 18. Rae1 Bh3 19. g4 Bg2 20. Kh2 h5 21. Rg1 hxg4 22. Kg3 Rh3 23. Kg4 - Oct 16 06:32 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … h5 21. Rg1 hxg4 22. Kg3 Rh3
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 a6 8. O-O axb5 9. Kh1 Qc7 10. Bf4 Qc4 11. d5 Nh6 12. dxe6 d6 13. Qd4 b6 14. Qc5 Qxc5 15. Nd4 Ng4 16. Bh6 Bxh6 17. hxg4 g5 18. Rae1 Bh3 19. g4 Bg2 20. Kh2 h5 21. Rg1 hxg4 22. Kg3 Rh3 - Oct 16 06:32 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 20. Kh2 h5 21. Rg1 hxg4 22. Kg3
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 a6 8. O-O axb5 9. Kh1 Qc7 10. Bf4 Qc4 11. d5 Nh6 12. dxe6 d6 13. Qd4 b6 14. Qc5 Qxc5 15. Nd4 Ng4 16. Bh6 Bxh6 17. hxg4 g5 18. Rae1 Bh3 19. g4 Bg2 20. Kh2 h5 21. Rg1 hxg4 22. Kg3 - Oct 16 06:32 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Bg2 20. Kh2 h5 21. Rg1 hxg4
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 a6 8. O-O axb5 9. Kh1 Qc7 10. Bf4 Qc4 11. d5 Nh6 12. dxe6 d6 13. Qd4 b6 14. Qc5 Qxc5 15. Nd4 Ng4 16. Bh6 Bxh6 17. hxg4 g5 18. Rae1 Bh3 19. g4 Bg2 20. Kh2 h5 21. Rg1 hxg4