83.7M
positions
16.0M
practically solved
307.81T
engine nodes
2.3M
analyses
2
in queue
3
active workers
20
active cores
23.9M
nodes / sec
3.1
positions / min
85
proof number
4,551
disproof number
Root conquest: 0/20 first moves solved · 19.1% of tree positions solved · last 24h: 94,665 closures, 2.20T 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 10.8h (median of 9) · measured at 2026-10-14 14:00 UTC
Closures by source, last 24h (94665 of 94665 labelled): USER 99.7% (94404) · FILL 0.1% (108) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.2% (153) · last 7d (1170239 of 1170239): USER 97.2% (1137152) · FILL 0.3% (3111) · AUTO 2.5% (29472) · SOLVE 0.0% (0) · NONE 0.0% (504). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- deep line, ply ≥19 · … Rh5 Ra8 g3 Bc1 (Fill) · 2.00B nodes · MoNiKaMaDnEsS-DESKTOP-VG9VPVH-atomicdb
- 1. Nh3 d5 2. Nc3 h6 … Ba3 10. Qe3 Rc8 11. c3 Nxf2 (User) · 512.0M nodes · randomchampgamer-2026PC-atomicdb
- 1. Nh3 d5 2. Nc3 h6 … 21. Bxc6 Bc5 22. Rd1 g6 23. f6 (User) · 512.0M 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 | 1134 | 2 | |
| g1h3 | unsolved | 703 | 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 | -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 37.3% of the fleet | 823.12B | 4,233 |
| 2 | randomchampgamer 30.6% of the fleet | 675.21B | 2,637 |
| 3 | RickEdinson 16.8% of the fleet | 370.40B | 2,025 |
| 4 | MoNiKaMaDnEsS 15.3% of the fleet | 336.27B | 1,840 |
4 accounts · 2.20T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 29.3% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 16.2% of the fleet | 49.94T | 344,541 |
| 3 | tenzink 13.9% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.2% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 6.2% of the fleet | 19.08T | 134,727 |
| 6 | Torom 5.1% of the fleet | 15.70T | 113,354 |
| 7 | RickEdinson 4.3% of the fleet | 13.11T | 86,109 |
| 8 | JackIV 3.3% of the fleet | 10.06T | 67,859 |
| 9 | MoNiKaMaDnEsS 2.5% of the fleet | 7.60T | 50,782 |
| 10 | gannet 2.4% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 307.85T 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 14 14:39 Solved: BLACK_WIN via MINIMAXview
1. Nf3 f6 2. Nc3 d6 … 6. e4 Be6 7. Qe2 Qe5 8. b4
1. Nf3 f6 2. Nc3 d6 3. Ng5 Bg4 4. f3 c6 5. Nxh7 Qa5 6. e4 Be6 7. Qe2 Qe5 8. b4 - Oct 14 14:39 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 c6 … 8. b4 Qd4 9. d3 Qf2 10. Kd1
1. Nf3 f6 2. Nc3 c6 3. Ng5 d6 4. Nxh7 Qa5 5. f3 Bg4 6. e4 Be6 7. Qe2 Qc5 8. b4 Qd4 9. d3 Qf2 10. Kd1 - Oct 14 14:39 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 c6 … Qc5 8. b4 Qd4 9. d3 Qf2
1. Nf3 f6 2. Nc3 c6 3. Ng5 d6 4. Nxh7 Qa5 5. f3 Bg4 6. e4 Be6 7. Qe2 Qc5 8. b4 Qd4 9. d3 Qf2 - Oct 14 14:39 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 c6 … 7. Qe2 Qc5 8. b4 Qd4 9. d3
1. Nf3 f6 2. Nc3 c6 3. Ng5 d6 4. Nxh7 Qa5 5. f3 Bg4 6. e4 Be6 7. Qe2 Qc5 8. b4 Qd4 9. d3 - Oct 14 14:39 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 c6 … Be6 7. Qe2 Qc5 8. b4 Qd4
1. Nf3 f6 2. Nc3 c6 3. Ng5 d6 4. Nxh7 Qa5 5. f3 Bg4 6. e4 Be6 7. Qe2 Qc5 8. b4 Qd4 - Oct 14 14:35 Solved: BLACK_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f6 … 6. e4 Be6 7. Qe2 Qe5 8. Qd1
1. Nf3 d6 2. Ng5 f6 3. f3 Bg4 4. Nxh7 c6 5. Nc3 Qa5 6. e4 Be6 7. Qe2 Qe5 8. Qd1 - Oct 14 14:35 Solved: BLACK_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f6 … 6. e4 Be6 7. Bc4 Qb5 8. Bd3
1. Nf3 d6 2. Ng5 f6 3. Nc3 c6 4. Nxh7 Qa5 5. f3 Bg4 6. e4 Be6 7. Bc4 Qb5 8. Bd3 - Oct 14 14:34 Solved: BLACK_WIN via MINIMAXview
1. Nf3 f6 2. e4 c6 … 7. b4 Be6 8. Bc4 Qh5 9. Ba6
1. Nf3 f6 2. e4 c6 3. Ng5 d6 4. Nc3 Qc7 5. Nxh7 Bh3 6. f3 Qa5 7. b4 Be6 8. Bc4 Qh5 9. Ba6 - Oct 14 14:34 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … 13. g3 Qh3 14. d3 Qf1 15. Kd2
1. Nf3 f6 2. e4 c6 3. Ng5 d6 4. Nc3 Qc7 5. Nxh7 Bh3 6. f3 Qa5 7. b4 Be6 8. Bc4 Qh5 9. Ba6 Bc4 10. Nd5 e6 11. Nc7 Kd8 12. Bxc4 Qh4 13. g3 Qh3 14. d3 Qf1 15. Kd2 - Oct 14 14:34 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … Qh4 13. g3 Qh3 14. d3 Qf1
1. Nf3 f6 2. e4 c6 3. Ng5 d6 4. Nc3 Qc7 5. Nxh7 Bh3 6. f3 Qa5 7. b4 Be6 8. Bc4 Qh5 9. Ba6 Bc4 10. Nd5 e6 11. Nc7 Kd8 12. Bxc4 Qh4 13. g3 Qh3 14. d3 Qf1 - Oct 14 14:34 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … 12. Bxc4 Qh4 13. g3 Qh3 14. d3
1. Nf3 f6 2. e4 c6 3. Ng5 d6 4. Nc3 Qc7 5. Nxh7 Bh3 6. f3 Qa5 7. b4 Be6 8. Bc4 Qh5 9. Ba6 Bc4 10. Nd5 e6 11. Nc7 Kd8 12. Bxc4 Qh4 13. g3 Qh3 14. d3 - Oct 14 14:34 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … Kd8 12. Bxc4 Qh4 13. g3 Qh3
1. Nf3 f6 2. e4 c6 3. Ng5 d6 4. Nc3 Qc7 5. Nxh7 Bh3 6. f3 Qa5 7. b4 Be6 8. Bc4 Qh5 9. Ba6 Bc4 10. Nd5 e6 11. Nc7 Kd8 12. Bxc4 Qh4 13. g3 Qh3