82.6M
positions
15.8M
practically solved
302.06T
engine nodes
2.3M
analyses
3
in queue
6
active workers
34
active cores
14.1M
nodes / sec
5.5
positions / min
85
proof number
4,552
disproof number
Root conquest: 0/20 first moves solved · 19.1% of tree positions solved · last 24h: 87,978 closures, 4.58T 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 4.2d (median of 2) · measured at 2026-10-12 16:00 UTC
Closures by source, last 24h (87978 of 87978 labelled): USER 99.0% (87102) · FILL 0.3% (240) · AUTO 0.7% (598) · SOLVE 0.0% (0) · NONE 0.0% (38) · last 7d (1486511 of 1486511): USER 97.8% (1453651) · FILL 0.2% (2936) · AUTO 2.0% (29481) · SOLVE 0.0% (0) · NONE 0.0% (443). 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 e6 … 16. g3 Bb7 17. Bg5 Rac8 18. c3 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … 15. f5 b5 16. g3 Bb7 17. Bg5 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. e4 e6 … O-O 19. Be3 Rac8 20. f5 exf5 (Fill) · 2.00B nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. e4 e6 … 16. Bd2 Bb7 17. g3 b5 18. c4 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nh3 d5 2. Nc3 h6 … Na6 13. O-O c6 14. a3 b6 (User) · 512.0M 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 | 1107 | 2 | |
| g1h3 | unsolved | 747 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| e2e4 | unsolved | 400 | 2 | |
| d2d4 | unsolved | 393 | 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 55.1% of the fleet | 2.52T | 17,773 |
| 2 | BManBJ 28.7% of the fleet | 1.31T | 8,145 |
| 3 | RickEdinson 9.3% of the fleet | 425.73B | 2,607 |
| 4 | randomchampgamer 4.3% of the fleet | 196.93B | 1,110 |
| 5 | MoNiKaMaDnEsS 2.7% of the fleet | 122.59B | 814 |
5 accounts · 4.58T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 29.9% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 15.8% of the fleet | 47.88T | 332,732 |
| 3 | tenzink 14.2% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.4% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 6.0% of the fleet | 18.16T | 130,741 |
| 6 | Torom 4.8% of the fleet | 14.40T | 104,848 |
| 7 | RickEdinson 4.1% of the fleet | 12.35T | 81,670 |
| 8 | JackIV 3.3% of the fleet | 10.06T | 67,859 |
| 9 | gannet 2.4% of the fleet | 7.24T | 46,848 |
| 10 | MoNiKaMaDnEsS 2.3% of the fleet | 6.93T | 46,845 |
and 25 more.
35 accounts · 302.15T 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 12 16:53 Solved: BLACK_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … 13. Bd3 Re2 14. Kf1 Re1 15. Kf2
1. Nh3 d5 2. Nc3 h6 3. d4 c6 4. e3 Bg4 5. f3 Na6 6. Ng5 hxg5 7. Ne4 g5 8. b4 b6 9. g3 f5 10. Bb2 Nf6 11. h4 Nxe4 12. hxg5 Rh2 13. Bd3 Re2 14. Kf1 Re1 15. Kf2 - Oct 12 16:53 Solved: BLACK_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … Rh2 13. Bd3 Re2 14. Kf1 Re1
1. Nh3 d5 2. Nc3 h6 3. d4 c6 4. e3 Bg4 5. f3 Na6 6. Ng5 hxg5 7. Ne4 g5 8. b4 b6 9. g3 f5 10. Bb2 Nf6 11. h4 Nxe4 12. hxg5 Rh2 13. Bd3 Re2 14. Kf1 Re1 - Oct 12 16:53 Solved: BLACK_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … 12. hxg5 Rh2 13. Bd3 Re2 14. Kf1
1. Nh3 d5 2. Nc3 h6 3. d4 c6 4. e3 Bg4 5. f3 Na6 6. Ng5 hxg5 7. Ne4 g5 8. b4 b6 9. g3 f5 10. Bb2 Nf6 11. h4 Nxe4 12. hxg5 Rh2 13. Bd3 Re2 14. Kf1 - Oct 12 16:53 Solved: BLACK_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … Nxe4 12. hxg5 Rh2 13. Bd3 Re2
1. Nh3 d5 2. Nc3 h6 3. d4 c6 4. e3 Bg4 5. f3 Na6 6. Ng5 hxg5 7. Ne4 g5 8. b4 b6 9. g3 f5 10. Bb2 Nf6 11. h4 Nxe4 12. hxg5 Rh2 13. Bd3 Re2 - Oct 12 16:53 Solved: BLACK_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … 11. h4 Nxe4 12. hxg5 Rh2 13. Bd3
1. Nh3 d5 2. Nc3 h6 3. d4 c6 4. e3 Bg4 5. f3 Na6 6. Ng5 hxg5 7. Ne4 g5 8. b4 b6 9. g3 f5 10. Bb2 Nf6 11. h4 Nxe4 12. hxg5 Rh2 13. Bd3 - Oct 12 16:53 Solved: BLACK_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … 13. Bxa6 Re2 14. Kf1 Re1 15. Kf2
1. Nh3 d5 2. Nc3 h6 3. d4 c6 4. e3 Bg4 5. f3 Na6 6. Ng5 hxg5 7. Ne4 g5 8. b4 b6 9. g3 f5 10. Bb2 Nf6 11. h4 Nxe4 12. hxg5 Rh2 13. Bxa6 Re2 14. Kf1 Re1 15. Kf2 - Oct 12 16:53 Solved: BLACK_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … Rh2 13. Bxa6 Re2 14. Kf1 Re1
1. Nh3 d5 2. Nc3 h6 3. d4 c6 4. e3 Bg4 5. f3 Na6 6. Ng5 hxg5 7. Ne4 g5 8. b4 b6 9. g3 f5 10. Bb2 Nf6 11. h4 Nxe4 12. hxg5 Rh2 13. Bxa6 Re2 14. Kf1 Re1 - Oct 12 16:53 Solved: BLACK_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … 12. hxg5 Rh2 13. Bxa6 Re2 14. Kf1
1. Nh3 d5 2. Nc3 h6 3. d4 c6 4. e3 Bg4 5. f3 Na6 6. Ng5 hxg5 7. Ne4 g5 8. b4 b6 9. g3 f5 10. Bb2 Nf6 11. h4 Nxe4 12. hxg5 Rh2 13. Bxa6 Re2 14. Kf1 - Oct 12 16:53 Solved: BLACK_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … Nxe4 12. hxg5 Rh2 13. Bxa6 Re2
1. Nh3 d5 2. Nc3 h6 3. d4 c6 4. e3 Bg4 5. f3 Na6 6. Ng5 hxg5 7. Ne4 g5 8. b4 b6 9. g3 f5 10. Bb2 Nf6 11. h4 Nxe4 12. hxg5 Rh2 13. Bxa6 Re2 - Oct 12 16:53 Solved: BLACK_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … 11. h4 Nxe4 12. hxg5 Rh2 13. Bxa6
1. Nh3 d5 2. Nc3 h6 3. d4 c6 4. e3 Bg4 5. f3 Na6 6. Ng5 hxg5 7. Ne4 g5 8. b4 b6 9. g3 f5 10. Bb2 Nf6 11. h4 Nxe4 12. hxg5 Rh2 13. Bxa6 - Oct 12 16:53 Solved: BLACK_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … 13. Bh3 Re2 14. Kf1 Re1 15. Kf2
1. Nh3 d5 2. Nc3 h6 3. d4 c6 4. e3 Bg4 5. f3 Na6 6. Ng5 hxg5 7. Ne4 g5 8. b4 b6 9. g3 f5 10. Bb2 Nf6 11. h4 Nxe4 12. hxg5 Rh2 13. Bh3 Re2 14. Kf1 Re1 15. Kf2 - Oct 12 16:53 Solved: BLACK_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … Rh2 13. Bh3 Re2 14. Kf1 Re1
1. Nh3 d5 2. Nc3 h6 3. d4 c6 4. e3 Bg4 5. f3 Na6 6. Ng5 hxg5 7. Ne4 g5 8. b4 b6 9. g3 f5 10. Bb2 Nf6 11. h4 Nxe4 12. hxg5 Rh2 13. Bh3 Re2 14. Kf1 Re1