87.0M
positions
16.5M
practically solved
320.94T
engine nodes
2.4M
analyses
153
in queue
13
active workers
60
active cores
13.5M
nodes / sec
33.9
positions / min
145
proof number
4,661
disproof number
Root conquest: 0/20 first moves solved · 19.0% of tree positions solved · last 24h: 195,976 closures, 5.95T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 70 over 207 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 3.5m (median of 105) · measured at 2026-10-18 20:00 UTC
Closures by source, last 24h (195880 of 195880 labelled): USER 97.9% (191761) · FILL 0.4% (856) · AUTO 1.6% (3199) · SOLVE 0.0% (0) · NONE 0.0% (64) · last 7d (769231 of 769327): USER 90.3% (694807) · FILL 0.9% (7134) · AUTO 8.7% (66745) · SOLVE 0.0% (0) · NONE 0.1% (545). 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 ≥26 · … Bb5 Rd8 d5 Rb8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- deep line, ply ≥26 · … Bb5 Rd8 d5 Ra8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- deep line, ply ≥26 · … Bb5 Rd8 d5 Rd7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- deep line, ply ≥26 · … Bb5 Rd8 d5 Ng8 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … O-O 14. Nc3 a5 15. h3 g5 (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 | 1076 | 2 | |
| g1h3 | unsolved | 821 | 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 | Torom 62.3% of the fleet | 3.71T | 24,466 |
| 2 | BManBJ 28.0% of the fleet | 1.67T | 11,079 |
| 3 | RickEdinson 8.1% of the fleet | 481.13B | 2,914 |
| 4 | MoNiKaMaDnEsS 1.0% of the fleet | 61.81B | 458 |
| 5 | soothdest 0.5% of the fleet | 31.99B | 204 |
5 accounts · 5.95T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 28.1% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 17.3% of the fleet | 55.70T | 391,867 |
| 3 | tenzink 13.3% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 9.8% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 6.2% of the fleet | 19.85T | 140,897 |
| 6 | Torom 6.1% of the fleet | 19.51T | 138,613 |
| 7 | RickEdinson 4.7% of the fleet | 15.05T | 100,501 |
| 8 | JackIV 3.1% of the fleet | 10.06T | 67,859 |
| 9 | MoNiKaMaDnEsS 2.7% of the fleet | 8.54T | 58,659 |
| 10 | gannet 2.3% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 321.11T 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 18 20:42 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … Ne7 15. Bh6 Ke8 16. Qd6 Nd5
1. Nf3 f6 2. e4 c6 3. Nc3 g6 4. Nd5 cxd5 5. d4 Nc6 6. Bb5 Qa5 7. c3 Bh6 8. Ng5 Bxg5 9. h4 b6 10. Qg4 e6 11. Qg3 d6 12. e5 Qb4 13. exd6 Kf8 14. cxb4 Ne7 15. Bh6 Ke8 16. Qd6 Nd5 - Oct 18 20:42 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … 14. cxb4 Ne7 15. Bh6 Ke8 16. Qd6
1. Nf3 f6 2. e4 c6 3. Nc3 g6 4. Nd5 cxd5 5. d4 Nc6 6. Bb5 Qa5 7. c3 Bh6 8. Ng5 Bxg5 9. h4 b6 10. Qg4 e6 11. Qg3 d6 12. e5 Qb4 13. exd6 Kf8 14. cxb4 Ne7 15. Bh6 Ke8 16. Qd6 - Oct 18 20:42 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … Kf8 14. cxb4 Ne7 15. Bh6 Ke8
1. Nf3 f6 2. e4 c6 3. Nc3 g6 4. Nd5 cxd5 5. d4 Nc6 6. Bb5 Qa5 7. c3 Bh6 8. Ng5 Bxg5 9. h4 b6 10. Qg4 e6 11. Qg3 d6 12. e5 Qb4 13. exd6 Kf8 14. cxb4 Ne7 15. Bh6 Ke8 - Oct 18 20:42 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … 13. exd6 Kf8 14. cxb4 Ne7 15. Bh6
1. Nf3 f6 2. e4 c6 3. Nc3 g6 4. Nd5 cxd5 5. d4 Nc6 6. Bb5 Qa5 7. c3 Bh6 8. Ng5 Bxg5 9. h4 b6 10. Qg4 e6 11. Qg3 d6 12. e5 Qb4 13. exd6 Kf8 14. cxb4 Ne7 15. Bh6 - Oct 18 20:42 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … Qb4 13. exd6 Kf8 14. cxb4 Ne7
1. Nf3 f6 2. e4 c6 3. Nc3 g6 4. Nd5 cxd5 5. d4 Nc6 6. Bb5 Qa5 7. c3 Bh6 8. Ng5 Bxg5 9. h4 b6 10. Qg4 e6 11. Qg3 d6 12. e5 Qb4 13. exd6 Kf8 14. cxb4 Ne7 - Oct 18 20:42 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … 12. e5 Qb4 13. exd6 Kf8 14. cxb4
1. Nf3 f6 2. e4 c6 3. Nc3 g6 4. Nd5 cxd5 5. d4 Nc6 6. Bb5 Qa5 7. c3 Bh6 8. Ng5 Bxg5 9. h4 b6 10. Qg4 e6 11. Qg3 d6 12. e5 Qb4 13. exd6 Kf8 14. cxb4 - Oct 18 20:42 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … d6 12. e5 Qb4 13. exd6 Kf8
1. Nf3 f6 2. e4 c6 3. Nc3 g6 4. Nd5 cxd5 5. d4 Nc6 6. Bb5 Qa5 7. c3 Bh6 8. Ng5 Bxg5 9. h4 b6 10. Qg4 e6 11. Qg3 d6 12. e5 Qb4 13. exd6 Kf8 - Oct 18 20:42 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … 11. Qg3 d6 12. e5 Qb4 13. exd6
1. Nf3 f6 2. e4 c6 3. Nc3 g6 4. Nd5 cxd5 5. d4 Nc6 6. Bb5 Qa5 7. c3 Bh6 8. Ng5 Bxg5 9. h4 b6 10. Qg4 e6 11. Qg3 d6 12. e5 Qb4 13. exd6 - Oct 18 20:42 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … e6 11. Qg3 d6 12. e5 Qb4
1. Nf3 f6 2. e4 c6 3. Nc3 g6 4. Nd5 cxd5 5. d4 Nc6 6. Bb5 Qa5 7. c3 Bh6 8. Ng5 Bxg5 9. h4 b6 10. Qg4 e6 11. Qg3 d6 12. e5 Qb4 - Oct 18 20:42 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … Ne7 15. Bh6 Bf5 16. Qd6 Bb1
1. Nf3 f6 2. e4 c6 3. Nc3 g6 4. Nd5 cxd5 5. d4 Nc6 6. Bb5 Qa5 7. c3 Bh6 8. Ng5 Bxg5 9. h4 b6 10. Qg4 e6 11. Qg3 d6 12. e5 Qxb5 13. exd6 e5 14. dxe5 Ne7 15. Bh6 Bf5 16. Qd6 Bb1 - Oct 18 20:42 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … 14. dxe5 Ne7 15. Bh6 Bf5 16. Qd6
1. Nf3 f6 2. e4 c6 3. Nc3 g6 4. Nd5 cxd5 5. d4 Nc6 6. Bb5 Qa5 7. c3 Bh6 8. Ng5 Bxg5 9. h4 b6 10. Qg4 e6 11. Qg3 d6 12. e5 Qxb5 13. exd6 e5 14. dxe5 Ne7 15. Bh6 Bf5 16. Qd6 - Oct 18 20:42 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … e5 14. dxe5 Ne7 15. Bh6 Bf5
1. Nf3 f6 2. e4 c6 3. Nc3 g6 4. Nd5 cxd5 5. d4 Nc6 6. Bb5 Qa5 7. c3 Bh6 8. Ng5 Bxg5 9. h4 b6 10. Qg4 e6 11. Qg3 d6 12. e5 Qxb5 13. exd6 e5 14. dxe5 Ne7 15. Bh6 Bf5