85.7M
positions
16.3M
practically solved
314.39T
engine nodes
2.4M
analyses
216
in queue
5
active workers
28
active cores
0
nodes / sec
6.3
positions / min
151
proof number
4,667
disproof number
Root conquest: 0/20 first moves solved · 19.1% of tree positions solved · last 24h: 56,668 closures, 2.11T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 70 over 212 open obligations, of which 39 (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 3.4m (median of 21) · measured at 2026-10-17 13:00 UTC
Closures by source, last 24h (56668 of 56668 labelled): USER 77.8% (44081) · FILL 2.0% (1146) · AUTO 20.0% (11355) · SOLVE 0.0% (0) · NONE 0.2% (86) · last 7d (689228 of 689228): USER 87.2% (601321) · FILL 1.0% (6903) · AUTO 11.7% (80477) · SOLVE 0.0% (0) · NONE 0.1% (527). 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. e4 e6 … 21. h5 Bh6 22. a5 bxa5 23. dxc6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nh3 e6 2. d4 h6 … 12. Bxd8 d5 13. Na3 b5 14. Rd1 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. e4 e6 … 21. h5 Bh6 22. a5 bxa5 23. b4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. e4 e6 … Rh6 21. Rh2 Bc8 22. Rf2 Rh7 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. e4 c6 … 12. a4 Nd8 13. Bb7 Qa6 14. c4 (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 | 1159 | 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 | BManBJ 64.6% of the fleet | 1.36T | 8,770 |
| 2 | RickEdinson 23.1% of the fleet | 487.53B | 2,996 |
| 3 | MoNiKaMaDnEsS 12.2% of the fleet | 257.73B | 1,890 |
3 accounts · 2.11T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 28.7% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 17.0% of the fleet | 53.56T | 378,767 |
| 3 | tenzink 13.6% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.0% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 6.3% of the fleet | 19.85T | 140,897 |
| 6 | Torom 5.0% of the fleet | 15.70T | 113,354 |
| 7 | RickEdinson 4.6% of the fleet | 14.44T | 97,000 |
| 8 | JackIV 3.2% of the fleet | 10.06T | 67,859 |
| 9 | MoNiKaMaDnEsS 2.7% of the fleet | 8.48T | 58,201 |
| 10 | gannet 2.3% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 314.45T 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 17 13:45 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … 13. Bb7 Qa6 14. Kf2 Qe2 15. Kg1
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 h5 10. Ba6 b6 11. f3 Nh6 12. a4 Nd8 13. Bb7 Qa6 14. Kf2 Qe2 15. Kg1 - Oct 17 13:45 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … Nd8 13. Bb7 Qa6 14. Kf2 Qe2
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 h5 10. Ba6 b6 11. f3 Nh6 12. a4 Nd8 13. Bb7 Qa6 14. Kf2 Qe2 - Oct 17 13:45 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … 12. a4 Nd8 13. Bb7 Qa6 14. Kf2
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 h5 10. Ba6 b6 11. f3 Nh6 12. a4 Nd8 13. Bb7 Qa6 14. Kf2 - Oct 17 13:43 Solved: BLACK_WIN via MATE_PVview
1. Nh3 e6 2. d4 h6 … 8. Bxf6 Qh4 9. g3 Qe4 10. f3
1. Nh3 e6 2. d4 h6 3. Bg5 Nf6 4. d5 Bb4 5. c3 d6 6. dxe6 f6 7. Qd5 Be6 8. Bxf6 Qh4 9. g3 Qe4 10. f3 - Oct 17 13:43 Solved: BLACK_WIN via MATE_PVview
1. Nh3 e6 2. d4 h6 … 8. Bxf6 Qh4 9. g3 Qe4 10. b3
1. Nh3 e6 2. d4 h6 3. Bg5 Nf6 4. d5 Bb4 5. c3 d6 6. dxe6 f6 7. Qd5 Be6 8. Bxf6 Qh4 9. g3 Qe4 10. b3 - Oct 17 13:43 Solved: BLACK_WIN via MATE_PVview
1. Nh3 e6 2. d4 h6 … 8. Bxf6 Qh4 9. g3 Qe4 10. a3
1. Nh3 e6 2. d4 h6 3. Bg5 Nf6 4. d5 Bb4 5. c3 d6 6. dxe6 f6 7. Qd5 Be6 8. Bxf6 Qh4 9. g3 Qe4 10. a3 - Oct 17 13:43 Solved: BLACK_WIN via MATE_PVview
1. Nh3 e6 2. d4 h6 … 9. g3 Qe4 10. e3 Qc2 11. f3
1. Nh3 e6 2. d4 h6 3. Bg5 Nf6 4. d5 Bb4 5. c3 d6 6. dxe6 f6 7. Qd5 Be6 8. Bxf6 Qh4 9. g3 Qe4 10. e3 Qc2 11. f3 - Oct 17 13:43 Solved: BLACK_WIN via MATE_PVview
1. Nh3 e6 2. d4 h6 … Qh4 9. g3 Qe4 10. e3 Qc2
1. Nh3 e6 2. d4 h6 3. Bg5 Nf6 4. d5 Bb4 5. c3 d6 6. dxe6 f6 7. Qd5 Be6 8. Bxf6 Qh4 9. g3 Qe4 10. e3 Qc2 - Oct 17 13:43 Solved: BLACK_WIN via MATE_PVview
1. Nh3 e6 2. d4 h6 … 8. Bxf6 Qh4 9. g3 Qe4 10. e3
1. Nh3 e6 2. d4 h6 3. Bg5 Nf6 4. d5 Bb4 5. c3 d6 6. dxe6 f6 7. Qd5 Be6 8. Bxf6 Qh4 9. g3 Qe4 10. e3 - Oct 17 13:40 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … Qh4 13. Qg5 Qh5 14. f3 Ba6
1. Nh3 d5 2. Nc3 h6 3. d4 e6 4. Bg5 hxg5 5. Ng5 f5 6. Nb5 Nf6 7. Qc1 Ne4 8. Kd1 Ba3 9. bxa3 Nc3 10. Nxc3 b5 11. e4 b4 12. Nf7 Qh4 13. Qg5 Qh5 14. f3 Ba6 - Oct 17 13:40 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … Qh4 13. Qg5 Qh5 14. f3 Qh6
1. Nh3 d5 2. Nc3 h6 3. d4 e6 4. Bg5 hxg5 5. Ng5 f5 6. Nb5 Nf6 7. Qc1 Ne4 8. Kd1 Ba3 9. bxa3 Nc3 10. Nxc3 b5 11. e4 b4 12. Nf7 Qh4 13. Qg5 Qh5 14. f3 Qh6 - Oct 17 13:40 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … Qh5 14. f3 Kd7 15. Bb5 c6
1. Nh3 d5 2. Nc3 h6 3. d4 e6 4. Bg5 hxg5 5. Ng5 f5 6. Nb5 Nf6 7. Qc1 Ne4 8. Kd1 Ba3 9. bxa3 Nc3 10. Nxc3 b5 11. e4 b4 12. Nf7 Qh4 13. Qg5 Qh5 14. f3 Kd7 15. Bb5 c6