96.9M
positions
20.4M
practically solved
350.48T
engine nodes
2.7M
analyses
4,439
in queue
13
active workers
60
active cores
85.0M
nodes / sec
39.7
positions / min
108
proof number
4,747
disproof number
Root conquest: 0/20 first moves solved · 21.0% of tree positions solved · last 24h: 1.1M closures, 7.46T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 over 206 open obligations, of which 38 (18.4%) 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 8.1m (median of 100) · measured at 2026-10-23 10:00 UTC
Closures by source, last 24h (1054667 of 1054667 labelled): USER 99.9% (1053657) · FILL 0.1% (768) · AUTO 0.0% (176) · SOLVE 0.0% (0) · NONE 0.0% (66) · last 7d (3818623 of 3818646): USER 99.0% (3780411) · FILL 0.3% (10446) · AUTO 0.7% (24894) · SOLVE 0.0% (0) · NONE 0.1% (2872). 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 ≥25 · … b4 Nd2 Kg7 e5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- deep line, ply ≥25 · … a5 Nd2 b4 e5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- deep line, ply ≥24 · … c4 b4 Nd2 e5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- deep line, ply ≥25 · … b4 Nd2 Rd8 c5 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … g5 14. exf6 e5 15. Kh1 Bg7 (User) · 128.0M 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 | 1084 | 2 | |
| g1h3 | unsolved | 630 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 402 | 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 | Torom 60.5% of the fleet | 4.52T | 34,943 |
| 2 | BManBJ 27.0% of the fleet | 2.02T | 15,878 |
| 3 | RickEdinson 6.5% of the fleet | 482.53B | 3,575 |
| 4 | MoNiKaMaDnEsS 6.0% of the fleet | 444.33B | 3,485 |
4 accounts · 7.46T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 25.8% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 18.3% of the fleet | 64.17T | 456,914 |
| 3 | tenzink 12.2% of the fleet | 42.83T | 349,427 |
| 4 | Torom 10.5% of the fleet | 36.81T | 266,798 |
| 5 | auranvesdranor 9.0% of the fleet | 31.40T | 228,002 |
| 6 | randomchampgamer 5.7% of the fleet | 19.85T | 140,897 |
| 7 | RickEdinson 4.9% of the fleet | 17.19T | 114,035 |
| 8 | MoNiKaMaDnEsS 2.9% of the fleet | 10.07T | 69,767 |
| 9 | JackIV 2.9% of the fleet | 10.06T | 67,859 |
| 10 | gannet 2.1% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 350.60T 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 23 10:30 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … 13. h3 Be6 14. c4 Ng4 15. g3
1. Nf3 f6 2. e4 c6 3. Nc3 g6 4. Nd5 cxd5 5. d4 d6 6. Ng5 Nc6 7. b4 fxg5 8. Bb5 Qa5 9. Bc4 Qd5 10. Bg5 Nf6 11. Bxd5 Bh6 12. O-O O-O 13. h3 Be6 14. c4 Ng4 15. g3 - Oct 23 10:30 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … 13. h3 Be6 14. c4 Ng4 15. a3
1. Nf3 f6 2. e4 c6 3. Nc3 g6 4. Nd5 cxd5 5. d4 d6 6. Ng5 Nc6 7. b4 fxg5 8. Bb5 Qa5 9. Bc4 Qd5 10. Bg5 Nf6 11. Bxd5 Bh6 12. O-O O-O 13. h3 Be6 14. c4 Ng4 15. a3 - Oct 23 10:30 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … 14. c4 Ng4 15. f4 Ne3 16. Bxe7
1. Nf3 f6 2. e4 c6 3. Nc3 g6 4. Nd5 cxd5 5. d4 d6 6. Ng5 Nc6 7. b4 fxg5 8. Bb5 Qa5 9. Bc4 Qd5 10. Bg5 Nf6 11. Bxd5 Bh6 12. O-O O-O 13. h3 Be6 14. c4 Ng4 15. f4 Ne3 16. Bxe7 - Oct 23 10:30 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … Be6 14. c4 Ng4 15. f4 Ne3
1. Nf3 f6 2. e4 c6 3. Nc3 g6 4. Nd5 cxd5 5. d4 d6 6. Ng5 Nc6 7. b4 fxg5 8. Bb5 Qa5 9. Bc4 Qd5 10. Bg5 Nf6 11. Bxd5 Bh6 12. O-O O-O 13. h3 Be6 14. c4 Ng4 15. f4 Ne3 - Oct 23 10:30 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … 13. h3 Be6 14. c4 Ng4 15. f4
1. Nf3 f6 2. e4 c6 3. Nc3 g6 4. Nd5 cxd5 5. d4 d6 6. Ng5 Nc6 7. b4 fxg5 8. Bb5 Qa5 9. Bc4 Qd5 10. Bg5 Nf6 11. Bxd5 Bh6 12. O-O O-O 13. h3 Be6 14. c4 Ng4 15. f4 - Oct 23 10:30 Solved: WHITE_WIN via MINIMAXview
deep line, ply ≥24 · … c4 b4 Nd2 h4
deep line, ply ≥24 · … c4 b4 Nd2 h4 - Oct 23 10:30 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥40 · … Qb1 Kf8 Qh7 fxg2
deep line, ply ≥40 · … Qb1 Kf8 Qh7 fxg2 - Oct 23 10:30 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥39 · … d5 Qb1 Kf8 Qh7
deep line, ply ≥39 · … d5 Qb1 Kf8 Qh7 - Oct 23 10:30 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥38 · … cxb5 d5 Qb1 Kf8
deep line, ply ≥38 · … cxb5 d5 Qb1 Kf8 - Oct 23 10:30 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥37 · … Rb5 cxb5 d5 Qb1
deep line, ply ≥37 · … Rb5 cxb5 d5 Qb1 - Oct 23 10:30 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥36 · … dxe5 Rb5 cxb5 d5
deep line, ply ≥36 · … dxe5 Rb5 cxb5 d5 - Oct 23 10:30 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥35 · … g5 dxe5 Rb5 cxb5
deep line, ply ≥35 · … g5 dxe5 Rb5 cxb5