83.3M
positions
15.9M
practically solved
305.83T
engine nodes
2.3M
analyses
2
in queue
5
active workers
34
active cores
8.8M
nodes / sec
5.2
positions / min
85
proof number
4,551
disproof number
Root conquest: 0/20 first moves solved · 19.1% of tree positions solved · last 24h: 107,716 closures, 3.77T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 70 over 216 open obligations, of which 41 (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 3.8h (median of 1) · measured at 2026-10-13 16:00 UTC
Closures by source, last 24h (107716 of 107716 labelled): USER 99.4% (107090) · FILL 0.5% (553) · AUTO 0.0% (16) · SOLVE 0.0% (0) · NONE 0.1% (57) · last 7d (1351451 of 1351451): USER 97.6% (1318350) · FILL 0.2% (3195) · AUTO 2.2% (29497) · SOLVE 0.0% (0) · NONE 0.0% (409). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- … Nf3 e6 Na3 c6 Nb5 cxb5 d4 Nc6 Bb5 h5 c3 Nh6 Ne5 fxe5 Bg5 Qf6 f4 Ng4 f5 Qxg5 Qxh5 g5 Rf1 e5 dxe5 d6 O-O-O d5 e5 g4 Rxd5 Kf7 Bc4 Kg7 f6 Kh7 e6 Bh6 Kb1 Bd2 f7 Bxe6 Bb5 Rhf8 Rf5 Kg7 a4 Bg5 c4 b6 Bd7 Rab8 b4 g3 Bc8 (Fill) · 512.0M nodes · BManBJ-Blake-atomicdb
- 1. Nh3 d5 2. Nc3 h6 … O-O-O 14. Nf8 c6 15. a3 h5 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nh3 d5 2. Nc3 h6 … 12. Bb2 Rh8 13. c4 Nc7 14. a4 (User) · 512.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nh3 d5 2. Nc3 h6 … g5 14. a4 Kb8 15. O-O g4 (User) · 512.0M nodes · randomchampgamer-2026PC-atomicdb
- 1. Nf3 f6 2. e4 e6 … Bxe5 8. h3 g6 9. f4 Nge7 (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 | 1111 | 2 | |
| g1h3 | unsolved | 753 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| e2e4 | unsolved | 400 | 2 | |
| d2d4 | unsolved | 395 | 2 | |
| b1c3 | unsolved | 127 | 2 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b1a3 | unsolved | 0 | 3 | |
| 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 36.6% of the fleet | 1.38T | 8,115 |
| 2 | Torom 34.3% of the fleet | 1.29T | 8,506 |
| 3 | RickEdinson 11.2% of the fleet | 420.66B | 2,540 |
| 4 | MoNiKaMaDnEsS 9.9% of the fleet | 371.85B | 2,252 |
| 5 | randomchampgamer 8.1% of the fleet | 304.30B | 1,571 |
5 accounts · 3.77T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 29.5% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 16.1% of the fleet | 49.25T | 340,831 |
| 3 | tenzink 14.0% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.3% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 6.0% of the fleet | 18.46T | 132,312 |
| 6 | Torom 5.1% of the fleet | 15.70T | 113,354 |
| 7 | RickEdinson 4.2% of the fleet | 12.77T | 84,205 |
| 8 | JackIV 3.3% of the fleet | 10.06T | 67,859 |
| 9 | MoNiKaMaDnEsS 2.4% of the fleet | 7.30T | 49,090 |
| 10 | gannet 2.4% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 305.91T 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 13 16:50 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. e4 e6 … Kh8 14. h3 Rh4 15. Bb2 Qg8
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 Bd6 6. Na4 f5 7. Ng5 Na6 8. Nc5 Bxc5 9. b4 fxg4 10. Qh5 g6 11. Qg5 O-O 12. f3 Rf4 13. Rg1 Kh8 14. h3 Rh4 15. Bb2 Qg8 - Oct 13 16:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Qg8 16. Qe7 Qf7 17. Rxg6 h5
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 Bd6 6. Na4 f5 7. Ng5 Na6 8. Nc5 Bxc5 9. b4 fxg4 10. Qh5 g6 11. Qg5 O-O 12. f3 Rf4 13. Rg1 Kh8 14. h3 Rh4 15. Bb2 Qg8 16. Qe7 Qf7 17. Rxg6 h5 - Oct 13 16:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 15. Bb2 Qg8 16. Qe7 Qf7 17. Rxg6
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 Bd6 6. Na4 f5 7. Ng5 Na6 8. Nc5 Bxc5 9. b4 fxg4 10. Qh5 g6 11. Qg5 O-O 12. f3 Rf4 13. Rg1 Kh8 14. h3 Rh4 15. Bb2 Qg8 16. Qe7 Qf7 17. Rxg6 - Oct 13 16:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Rh4 15. Bb2 Qg8 16. Qe7 Qf7
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 Bd6 6. Na4 f5 7. Ng5 Na6 8. Nc5 Bxc5 9. b4 fxg4 10. Qh5 g6 11. Qg5 O-O 12. f3 Rf4 13. Rg1 Kh8 14. h3 Rh4 15. Bb2 Qg8 16. Qe7 Qf7 - Oct 13 16:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 14. h3 Rh4 15. Bb2 Qg8 16. Qe7
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 Bd6 6. Na4 f5 7. Ng5 Na6 8. Nc5 Bxc5 9. b4 fxg4 10. Qh5 g6 11. Qg5 O-O 12. f3 Rf4 13. Rg1 Kh8 14. h3 Rh4 15. Bb2 Qg8 16. Qe7 - Oct 13 16:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Qg8 16. d5 e5 17. Qf6 Qg7
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 Bd6 6. Na4 f5 7. Ng5 Na6 8. Nc5 Bxc5 9. b4 fxg4 10. Qh5 g6 11. Qg5 O-O 12. f3 Rf4 13. Rg1 Kh8 14. h3 Rh4 15. Bb2 Qg8 16. d5 e5 17. Qf6 Qg7 - Oct 13 16:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 15. Bb2 Qg8 16. d5 e5 17. Qf6
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 Bd6 6. Na4 f5 7. Ng5 Na6 8. Nc5 Bxc5 9. b4 fxg4 10. Qh5 g6 11. Qg5 O-O 12. f3 Rf4 13. Rg1 Kh8 14. h3 Rh4 15. Bb2 Qg8 16. d5 e5 17. Qf6 - Oct 13 16:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Rh4 15. Bb2 Qg8 16. d5 e5
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 Bd6 6. Na4 f5 7. Ng5 Na6 8. Nc5 Bxc5 9. b4 fxg4 10. Qh5 g6 11. Qg5 O-O 12. f3 Rf4 13. Rg1 Kh8 14. h3 Rh4 15. Bb2 Qg8 16. d5 e5 - Oct 13 16:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 14. h3 Rh4 15. Bb2 Qg8 16. d5
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 Bd6 6. Na4 f5 7. Ng5 Na6 8. Nc5 Bxc5 9. b4 fxg4 10. Qh5 g6 11. Qg5 O-O 12. f3 Rf4 13. Rg1 Kh8 14. h3 Rh4 15. Bb2 Qg8 16. d5 - Oct 13 16:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Rh4 15. Bb2 Qg8 16. Qf6 Qg7
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 Bd6 6. Na4 f5 7. Ng5 Na6 8. Nc5 Bxc5 9. b4 fxg4 10. Qh5 g6 11. Qg5 O-O 12. f3 Rf4 13. Rg1 Kh8 14. h3 Rh4 15. Bb2 Qg8 16. Qf6 Qg7 - Oct 13 16:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 14. h3 Rh4 15. Bb2 Qg8 16. Qf6
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 Bd6 6. Na4 f5 7. Ng5 Na6 8. Nc5 Bxc5 9. b4 fxg4 10. Qh5 g6 11. Qg5 O-O 12. f3 Rf4 13. Rg1 Kh8 14. h3 Rh4 15. Bb2 Qg8 16. Qf6 - Oct 13 16:50 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. e4 e6 … Kh8 14. h3 Rh4 15. Bb2 Qe8
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 Bd6 6. Na4 f5 7. Ng5 Na6 8. Nc5 Bxc5 9. b4 fxg4 10. Qh5 g6 11. Qg5 O-O 12. f3 Rf4 13. Rg1 Kh8 14. h3 Rh4 15. Bb2 Qe8