81.9M
positions
15.7M
practically solved
298.87T
engine nodes
2.3M
analyses
3,475
in queue
13
active workers
60
active cores
0
nodes / sec
33.5
positions / min
85
proof number
4,552
disproof number
Root conquest: 0/20 first moves solved · 19.2% of tree positions solved · last 24h: 82,207 closures, 3.90T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 over 219 open obligations, of which 41 (18.7%) 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 7.9h (median of 5) · measured at 2026-10-12 00:00 UTC
Closures by source, last 24h (82208 of 82208 labelled): USER 78.6% (64618) · FILL 0.8% (625) · AUTO 20.6% (16931) · SOLVE 0.0% (0) · NONE 0.0% (34) · last 7d (1595846 of 1595846): USER 98.0% (1563467) · FILL 0.2% (2696) · AUTO 1.8% (28883) · SOLVE 0.0% (0) · NONE 0.1% (800). 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. Nc3 c6 … 20. Kb1 g4 21. f6 a6 22. Be2 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. e4 e6 … 16. Kh1 Ra4 17. b4 Nh6 18. a3 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. e4 e6 … Bb4 14. Ra7 O-O 15. c3 Ba5 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 c6 … Be5 19. Rd8 Kh7 20. Kb1 g4 (User) · 128.0M nodes · RickEdinson-MSI-atomicdb
- 1. Nf3 f6 2. e4 e6 … Nh6 17. Kh1 O-O 18. a4 Kh8 (User) · 128.0M nodes · Torom-torsten-pc-atomicdb#0
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 | 1143 | 2 | |
| g1h3 | unsolved | 753 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| e2e4 | unsolved | 400 | 2 | |
| d2d4 | unsolved | 389 | 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 41.9% of the fleet | 1.64T | 12,481 |
| 2 | BManBJ 30.6% of the fleet | 1.20T | 10,007 |
| 3 | randomchampgamer 14.5% of the fleet | 568.09B | 3,907 |
| 4 | RickEdinson 10.0% of the fleet | 389.95B | 3,024 |
| 5 | MoNiKaMaDnEsS 2.9% of the fleet | 114.56B | 1,690 |
5 accounts · 3.91T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 30.2% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 15.7% of the fleet | 47.01T | 327,439 |
| 3 | tenzink 14.3% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.5% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 6.1% of the fleet | 18.16T | 130,741 |
| 6 | Torom 4.2% of the fleet | 12.65T | 92,625 |
| 7 | RickEdinson 4.0% of the fleet | 12.07T | 79,883 |
| 8 | JackIV 3.4% 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 | 6.80T | 46,031 |
and 25 more.
35 accounts · 299.12T 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 00:57 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … O-O 17. exd6 Be5 18. Rd8 g4
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 h5 7. c3 Nh6 8. Ne5 fxe5 9. Bg5 Qf6 10. f4 Ng4 11. f5 Qxg5 12. Qxh5 g5 13. Rf1 e5 14. dxe5 d6 15. O-O-O Bg7 16. e5 O-O 17. exd6 Be5 18. Rd8 g4 - Oct 12 00:56 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 15. g4 Qe4 16. Kd1 Qe2 17. Kc1
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. c3 d6 8. e5 Nh6 9. Bxh6 axb5 10. Ng5 dxe5 11. Nxh7 Qa5 12. Qe2 Qb5 13. Qd3 Qf5 14. f3 Bd7 15. g4 Qe4 16. Kd1 Qe2 17. Kc1 - Oct 12 00:56 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Bd7 15. g4 Qe4 16. Kd1 Qe2
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. c3 d6 8. e5 Nh6 9. Bxh6 axb5 10. Ng5 dxe5 11. Nxh7 Qa5 12. Qe2 Qb5 13. Qd3 Qf5 14. f3 Bd7 15. g4 Qe4 16. Kd1 Qe2 - Oct 12 00:56 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 14. f3 Bd7 15. g4 Qe4 16. Kd1
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. c3 d6 8. e5 Nh6 9. Bxh6 axb5 10. Ng5 dxe5 11. Nxh7 Qa5 12. Qe2 Qb5 13. Qd3 Qf5 14. f3 Bd7 15. g4 Qe4 16. Kd1 - Oct 12 00:56 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 15. g4 Qe4 16. Kf1 Qe2 17. Kg1
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. c3 d6 8. e5 Nh6 9. Bxh6 axb5 10. Ng5 dxe5 11. Nxh7 Qa5 12. Qe2 Qb5 13. Qd3 Qf5 14. f3 Bd7 15. g4 Qe4 16. Kf1 Qe2 17. Kg1 - Oct 12 00:56 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Bd7 15. g4 Qe4 16. Kf1 Qe2
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. c3 d6 8. e5 Nh6 9. Bxh6 axb5 10. Ng5 dxe5 11. Nxh7 Qa5 12. Qe2 Qb5 13. Qd3 Qf5 14. f3 Bd7 15. g4 Qe4 16. Kf1 Qe2 - Oct 12 00:56 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 14. f3 Bd7 15. g4 Qe4 16. Kf1
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. c3 d6 8. e5 Nh6 9. Bxh6 axb5 10. Ng5 dxe5 11. Nxh7 Qa5 12. Qe2 Qb5 13. Qd3 Qf5 14. f3 Bd7 15. g4 Qe4 16. Kf1 - Oct 12 00:56 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 15. g4 Qe4 16. Qe3 Qc2 17. Qe5
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. c3 d6 8. e5 Nh6 9. Bxh6 axb5 10. Ng5 dxe5 11. Nxh7 Qa5 12. Qe2 Qb5 13. Qd3 Qf5 14. f3 Bd7 15. g4 Qe4 16. Qe3 Qc2 17. Qe5 - Oct 12 00:56 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Bd7 15. g4 Qe4 16. Qe3 Qc2
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. c3 d6 8. e5 Nh6 9. Bxh6 axb5 10. Ng5 dxe5 11. Nxh7 Qa5 12. Qe2 Qb5 13. Qd3 Qf5 14. f3 Bd7 15. g4 Qe4 16. Qe3 Qc2 - Oct 12 00:56 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 14. f3 Bd7 15. g4 Qe4 16. Qe3
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. c3 d6 8. e5 Nh6 9. Bxh6 axb5 10. Ng5 dxe5 11. Nxh7 Qa5 12. Qe2 Qb5 13. Qd3 Qf5 14. f3 Bd7 15. g4 Qe4 16. Qe3 - Oct 12 00:56 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 15. g4 Qe4 16. Kf1 Qe2 17. Kg1
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. c3 d6 8. e5 Nh6 9. Bxh6 axb5 10. Ng5 dxe5 11. Nxh7 Qa5 12. Qe2 Qb5 13. Qd3 Qf5 14. f4 Bd7 15. g4 Qe4 16. Kf1 Qe2 17. Kg1 - Oct 12 00:56 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Bd7 15. g4 Qe4 16. Kf1 Qe2
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. c3 d6 8. e5 Nh6 9. Bxh6 axb5 10. Ng5 dxe5 11. Nxh7 Qa5 12. Qe2 Qb5 13. Qd3 Qf5 14. f4 Bd7 15. g4 Qe4 16. Kf1 Qe2