101.3M
positions
21.3M
practically solved
369.27T
engine nodes
2.8M
analyses
241
in queue
13
active workers
60
active cores
86.2M
nodes / sec
36.8
positions / min
107
proof number
4,809
disproof number
Root conquest: 0/20 first moves solved · 21.0% of tree positions solved · last 24h: 114,699 closures, 3.93T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 over 201 open obligations, of which 36 (17.9%) 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 6.3m (median of 3) · measured at 2026-10-27 10:00 UTC
Closures by source, last 24h (114697 of 114697 labelled): USER 93.2% (106864) · FILL 0.9% (1002) · AUTO 5.9% (6795) · SOLVE 0.0% (0) · NONE 0.0% (36) · last 7d (3749048 of 3749050): USER 99.3% (3723647) · FILL 0.3% (10008) · AUTO 0.4% (14924) · SOLVE 0.0% (0) · NONE 0.0% (469). 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 … axb5 10. Qd3 Qa5 11. d5 Qa6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#0
- 1. Nh3 d5 2. Nc3 h6 … 15. Qd7 Qxd7 16. Bd3 b5 17. Bb2 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. Nc3 c6 … axb5 10. Qd3 Qa5 11. d5 Qb5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. Nc3 c6 … Bd6 9. Kh1 axb5 10. Qd3 Ra5 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 c6 … Bd6 9. Kh1 axb5 10. Qd3 Ne7 (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 | 1073 | 2 | |
| g1h3 | unsolved | 781 | 2 | |
| e2e3 | unsolved | 469 | 3 | |
| d2d4 | unsolved | 405 | 2 | |
| e2e4 | unsolved | 401 | 2 | |
| b1c3 | unsolved | 138 | 2 | |
| b1a3 | unsolved | 0 | 3 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b2b4 | unsolved | -59 | 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 44.4% of the fleet | 1.74T | 10,080 |
| 2 | Torom 35.5% of the fleet | 1.40T | 8,868 |
| 3 | RickEdinson 12.2% of the fleet | 481.20B | 2,799 |
| 4 | MoNiKaMaDnEsS 7.9% of the fleet | 308.90B | 1,683 |
4 accounts · 3.93T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 24.4% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 19.3% of the fleet | 71.16T | 500,291 |
| 3 | Torom 12.3% of the fleet | 45.59T | 331,156 |
| 4 | tenzink 11.6% of the fleet | 42.83T | 349,427 |
| 5 | auranvesdranor 8.5% of the fleet | 31.40T | 228,002 |
| 6 | randomchampgamer 5.4% of the fleet | 19.85T | 140,897 |
| 7 | RickEdinson 5.2% of the fleet | 19.09T | 125,850 |
| 8 | MoNiKaMaDnEsS 3.0% of the fleet | 11.27T | 77,826 |
| 9 | JackIV 2.7% of the fleet | 10.06T | 67,859 |
| 10 | gannet 2.0% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 369.47T 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 27 10:40 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Bd6 8. Ne5 h5 9. h3 a5
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. O-O Bd6 8. Ne5 h5 9. h3 a5 - Oct 27 10:40 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Bd6 8. Ne5 h5 9. h3 h4
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. O-O Bd6 8. Ne5 h5 9. h3 h4 - Oct 27 10:39 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 19. g3 Bh3 20. Bd8 Bg2 21. Kg1
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. Ng5 a6 8. O-O fxg5 9. Bg5 Nf6 10. d5 Qa5 11. dxe6 Bd6 12. Bxc6 d5 13. Kh1 O-O 14. Qd2 Qc3 15. Be7 Rf4 16. f3 b6 17. Qxc3 a5 18. Rad1 a4 19. g3 Bh3 20. Bd8 Bg2 21. Kg1 - Oct 27 10:39 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … a4 19. g3 Bh3 20. Bd8 Bg2
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. Ng5 a6 8. O-O fxg5 9. Bg5 Nf6 10. d5 Qa5 11. dxe6 Bd6 12. Bxc6 d5 13. Kh1 O-O 14. Qd2 Qc3 15. Be7 Rf4 16. f3 b6 17. Qxc3 a5 18. Rad1 a4 19. g3 Bh3 20. Bd8 Bg2 - Oct 27 10:39 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 18. Rad1 a4 19. g3 Bh3 20. Bd8
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. Ng5 a6 8. O-O fxg5 9. Bg5 Nf6 10. d5 Qa5 11. dxe6 Bd6 12. Bxc6 d5 13. Kh1 O-O 14. Qd2 Qc3 15. Be7 Rf4 16. f3 b6 17. Qxc3 a5 18. Rad1 a4 19. g3 Bh3 20. Bd8 - Oct 27 10:39 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 19. g3 Bh3 20. Bd6 Bg2 21. Kg1
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. Ng5 a6 8. O-O fxg5 9. Bg5 Nf6 10. d5 Qa5 11. dxe6 Bd6 12. Bxc6 d5 13. Kh1 O-O 14. Qd2 Qc3 15. Be7 Rf4 16. f3 b6 17. Qxc3 a5 18. Rad1 a4 19. g3 Bh3 20. Bd6 Bg2 21. Kg1 - Oct 27 10:39 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … a4 19. g3 Bh3 20. Bd6 Bg2
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. Ng5 a6 8. O-O fxg5 9. Bg5 Nf6 10. d5 Qa5 11. dxe6 Bd6 12. Bxc6 d5 13. Kh1 O-O 14. Qd2 Qc3 15. Be7 Rf4 16. f3 b6 17. Qxc3 a5 18. Rad1 a4 19. g3 Bh3 20. Bd6 Bg2 - Oct 27 10:39 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 18. Rad1 a4 19. g3 Bh3 20. Bd6
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. Ng5 a6 8. O-O fxg5 9. Bg5 Nf6 10. d5 Qa5 11. dxe6 Bd6 12. Bxc6 d5 13. Kh1 O-O 14. Qd2 Qc3 15. Be7 Rf4 16. f3 b6 17. Qxc3 a5 18. Rad1 a4 19. g3 Bh3 20. Bd6 - Oct 27 10:39 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 19. g3 Bh3 20. gxf4 Bg2 21. Kg1
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. Ng5 a6 8. O-O fxg5 9. Bg5 Nf6 10. d5 Qa5 11. dxe6 Bd6 12. Bxc6 d5 13. Kh1 O-O 14. Qd2 Qc3 15. Be7 Rf4 16. f3 b6 17. Qxc3 a5 18. Rad1 a4 19. g3 Bh3 20. gxf4 Bg2 21. Kg1 - Oct 27 10:39 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … a4 19. g3 Bh3 20. gxf4 Bg2
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. Ng5 a6 8. O-O fxg5 9. Bg5 Nf6 10. d5 Qa5 11. dxe6 Bd6 12. Bxc6 d5 13. Kh1 O-O 14. Qd2 Qc3 15. Be7 Rf4 16. f3 b6 17. Qxc3 a5 18. Rad1 a4 19. g3 Bh3 20. gxf4 Bg2 - Oct 27 10:39 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 18. Rad1 a4 19. g3 Bh3 20. gxf4
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. Ng5 a6 8. O-O fxg5 9. Bg5 Nf6 10. d5 Qa5 11. dxe6 Bd6 12. Bxc6 d5 13. Kh1 O-O 14. Qd2 Qc3 15. Be7 Rf4 16. f3 b6 17. Qxc3 a5 18. Rad1 a4 19. g3 Bh3 20. gxf4 - Oct 27 10:39 Solved: BLACK_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 e5 … 6. c3 Bg4 7. Qb3 Be2 8. Nxa7
1. Nh3 d5 2. Nc3 e5 3. Ng5 c6 4. e4 f6 5. Nb5 Bb4 6. c3 Bg4 7. Qb3 Be2 8. Nxa7