82.7M
positions
15.8M
practically solved
302.42T
engine nodes
2.3M
analyses
312
in queue
3
active workers
20
active cores
5.8M
nodes / sec
4.8
positions / min
85
proof number
4,552
disproof number
Root conquest: 0/20 first moves solved · 19.1% of tree positions solved · last 24h: 89,417 closures, 4.53T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 70 over 218 open obligations, of which 41 (18.8%) 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 1.4h (median of 6) · measured at 2026-10-12 20:00 UTC
Closures by source, last 24h (89417 of 89417 labelled): USER 99.0% (88545) · FILL 0.3% (240) · AUTO 0.7% (598) · SOLVE 0.0% (0) · NONE 0.0% (34) · last 7d (1474793 of 1474793): USER 97.8% (1441946) · FILL 0.2% (2936) · AUTO 2.0% (29481) · SOLVE 0.0% (0) · NONE 0.0% (430). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nh3 d5 2. Nc3 h6 … Ra4 14. h4 e5 15. a3 Ne7 (User) · 512.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … 9. c4 Nf6 10. Bh6 a6 11. O-O (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 d5 … 9. Bh3 Ng4 10. Bxg4 Kd8 11. d3 (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 | 1127 | 2 | |
| g1h3 | unsolved | 753 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| e2e4 | unsolved | 400 | 2 | |
| d2d4 | unsolved | 393 | 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 55.6% of the fleet | 2.52T | 17,773 |
| 2 | BManBJ 29.0% of the fleet | 1.31T | 8,086 |
| 3 | RickEdinson 9.4% of the fleet | 425.48B | 2,655 |
| 4 | MoNiKaMaDnEsS 3.9% of the fleet | 177.64B | 1,215 |
| 5 | randomchampgamer 2.1% of the fleet | 94.93B | 620 |
5 accounts · 4.53T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 29.9% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 15.9% of the fleet | 48.07T | 333,808 |
| 3 | tenzink 14.2% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.4% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 6.0% of the fleet | 18.16T | 130,741 |
| 6 | Torom 4.8% of the fleet | 14.40T | 104,848 |
| 7 | RickEdinson 4.1% of the fleet | 12.43T | 82,106 |
| 8 | JackIV 3.3% 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 | 6.98T | 47,246 |
and 25 more.
35 accounts · 302.47T 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 20:54 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 Nh6 … 16. Bxg4 c5 17. a5 e3 18. Ke1
1. Nf3 f6 2. Nc3 Nh6 3. g4 d5 4. Nb5 Bxg4 5. c3 e5 6. Qa4 Na6 7. Nxa7 c6 8. Bh3 f5 9. Qa8 Qxa8 10. d4 Be7 11. Bg5 Ba3 12. Bf6 gxf6 13. bxa3 Rg8 14. Kd2 e4 15. a4 Ng4 16. Bxg4 c5 17. a5 e3 18. Ke1 - Oct 12 20:54 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 Nh6 … 16. Bxg4 c5 17. a5 e3 18. Kd3
1. Nf3 f6 2. Nc3 Nh6 3. g4 d5 4. Nb5 Bxg4 5. c3 e5 6. Qa4 Na6 7. Nxa7 c6 8. Bh3 f5 9. Qa8 Qxa8 10. d4 Be7 11. Bg5 Ba3 12. Bf6 gxf6 13. bxa3 Rg8 14. Kd2 e4 15. a4 Ng4 16. Bxg4 c5 17. a5 e3 18. Kd3 - Oct 12 20:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Na6 12. a3 Kf7 13. Bh6 h4
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 a6 10. O-O a5 11. Nxh8 Na6 12. a3 Kf7 13. Bh6 h4 - Oct 12 20:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Na6 12. a3 Kf7 13. Bh6 f4
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 a6 10. O-O a5 11. Nxh8 Na6 12. a3 Kf7 13. Bh6 f4 - Oct 12 20:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Na6 12. a3 Kf7 13. Bh6 a4
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 a6 10. O-O a5 11. Nxh8 Na6 12. a3 Kf7 13. Bh6 a4 - Oct 12 20:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Bf5 16. dxe5 Kg8 17. Qf8 Kh7
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 Bh6 10. Nxh8 a5 11. O-O Na6 12. a3 Kf8 13. Bxh6 Kf7 14. exf5 e5 15. Qf3 Bf5 16. dxe5 Kg8 17. Qf8 Kh7 - Oct 12 20:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 15. Qf3 Bf5 16. dxe5 Kg8 17. Qf8
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 Bh6 10. Nxh8 a5 11. O-O Na6 12. a3 Kf8 13. Bxh6 Kf7 14. exf5 e5 15. Qf3 Bf5 16. dxe5 Kg8 17. Qf8 - Oct 12 20:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 13. Bxh6 Kf7 14. exf5 e5 15. Qf3
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 Bh6 10. Nxh8 a5 11. O-O Na6 12. a3 Kf8 13. Bxh6 Kf7 14. exf5 e5 15. Qf3 - Oct 12 20:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Kf8 13. Bxh6 Kf7 14. exf5 e5
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 Bh6 10. Nxh8 a5 11. O-O Na6 12. a3 Kf8 13. Bxh6 Kf7 14. exf5 e5 - Oct 12 20:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 12. a3 Kf8 13. Bxh6 Kf7 14. exf5
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 Bh6 10. Nxh8 a5 11. O-O Na6 12. a3 Kf8 13. Bxh6 Kf7 14. exf5 - Oct 12 20:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Na6 12. a3 Kf8 13. Bxh6 Kf7
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 Bh6 10. Nxh8 a5 11. O-O Na6 12. a3 Kf8 13. Bxh6 Kf7 - Oct 12 20:53 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … Kd8 21. Rd7 Ke8 22. Bxe5 Kf8
1. Nh3 d5 2. Nc3 h6 3. d4 a6 4. f3 Bg4 5. Ne4 Bxf3 6. e4 c6 7. Bb5 e6 8. O-O f5 9. g3 Bb4 10. c3 g6 11. exf5 Nf6 12. Ng5 cxb5 13. Nxe6 Qf6 14. Re1 Qe6 15. Qf3 Kd8 16. Qf6 Qxf6 17. Re8 Kd7 18. Bf4 Nc6 19. Rae1 Ne5 20. Re7 Kd8 21. Rd7 Ke8 22. Bxe5 Kf8