98.7M
positions
20.7M
practically solved
358.13T
engine nodes
2.7M
analyses
2,005
in queue
14
active workers
68
active cores
94.1M
nodes / sec
44.1
positions / min
108
proof number
4,747
disproof number
Root conquest: 0/20 first moves solved · 21.0% of tree positions solved · last 24h: 273,645 closures, 7.67T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 72 over 205 open obligations, of which 38 (18.5%) 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 3.3h (median of 7) · measured at 2026-10-24 10:00 UTC
Closures by source, last 24h (273645 of 273645 labelled): USER 100.0% (273573) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.0% (72) · last 7d (4033455 of 4033455): USER 99.5% (4013366) · FILL 0.2% (9042) · AUTO 0.2% (8185) · SOLVE 0.0% (0) · NONE 0.1% (2862). 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. Ne5 fxe5 … 16. Na4 Be6 17. Nb6 Kc7 18. a3 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. Ne5 fxe5 … O-O-O 16. Na4 Be6 17. Nb6 Kc7 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. Ne5 fxe5 … 16. Na4 Be6 17. Nb6 Kc7 18. Ba3 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. Ne5 fxe5 … O-O-O 16. Na4 Be6 17. Nc5 d4 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. Ne5 fxe5 … 15. h4 O-O-O 16. Na4 Be6 17. d4 (User) · 128.0M nodes · MoNiKaMaDnEsS-DESKTOP-VG9VPVH-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 | 1176 | 2 | |
| g1h3 | unsolved | 630 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 401 | 2 | |
| e2e4 | unsolved | 401 | 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 68.0% of the fleet | 5.22T | 39,708 |
| 2 | BManBJ 22.4% of the fleet | 1.72T | 11,836 |
| 3 | RickEdinson 6.1% of the fleet | 468.70B | 3,110 |
| 4 | MoNiKaMaDnEsS 3.5% of the fleet | 269.04B | 2,107 |
| 5 | soothdest <0.1% of the fleet | 1.66B | 13 |
5 accounts · 7.67T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 25.2% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 18.4% of the fleet | 65.91T | 468,939 |
| 3 | tenzink 12.0% of the fleet | 42.83T | 349,427 |
| 4 | Torom 11.7% of the fleet | 42.09T | 306,978 |
| 5 | auranvesdranor 8.8% of the fleet | 31.40T | 228,002 |
| 6 | randomchampgamer 5.5% of the fleet | 19.85T | 140,897 |
| 7 | RickEdinson 4.9% of the fleet | 17.67T | 117,193 |
| 8 | MoNiKaMaDnEsS 2.9% of the fleet | 10.33T | 71,874 |
| 9 | JackIV 2.8% of the fleet | 10.06T | 67,859 |
| 10 | gannet 2.0% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 358.37T 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 24 10:47 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Bf2 14. Kh1 g6 15. Qh8 Ke7
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 Bc5 7. O-O d6 8. h3 b6 9. Ba6 Bb4 10. Ng5 Bxa6 11. Nxh7 Be1 12. f4 Kf8 13. Qh5 Bf2 14. Kh1 g6 15. Qh8 Ke7 - Oct 24 10:47 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 13. Qh5 Bf2 14. Kh1 g6 15. Qh8
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 Bc5 7. O-O d6 8. h3 b6 9. Ba6 Bb4 10. Ng5 Bxa6 11. Nxh7 Be1 12. f4 Kf8 13. Qh5 Bf2 14. Kh1 g6 15. Qh8 - Oct 24 10:47 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Kf8 13. Qh5 Bf2 14. Kh1 g6
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 Bc5 7. O-O d6 8. h3 b6 9. Ba6 Bb4 10. Ng5 Bxa6 11. Nxh7 Be1 12. f4 Kf8 13. Qh5 Bf2 14. Kh1 g6 - Oct 24 10:47 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 12. f4 Kf8 13. Qh5 Bf2 14. Kh1
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 Bc5 7. O-O d6 8. h3 b6 9. Ba6 Bb4 10. Ng5 Bxa6 11. Nxh7 Be1 12. f4 Kf8 13. Qh5 Bf2 14. Kh1 - Oct 24 10:47 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Be1 12. f4 Kf8 13. Qh5 Bf2
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 Bc5 7. O-O d6 8. h3 b6 9. Ba6 Bb4 10. Ng5 Bxa6 11. Nxh7 Be1 12. f4 Kf8 13. Qh5 Bf2 - Oct 24 10:47 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 11. Nxh7 Be1 12. f4 Kf8 13. Qh5
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 Bc5 7. O-O d6 8. h3 b6 9. Ba6 Bb4 10. Ng5 Bxa6 11. Nxh7 Be1 12. f4 Kf8 13. Qh5 - Oct 24 10:47 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Bxa6 11. Nxh7 Be1 12. f4 Kf8
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 Bc5 7. O-O d6 8. h3 b6 9. Ba6 Bb4 10. Ng5 Bxa6 11. Nxh7 Be1 12. f4 Kf8 - Oct 24 10:47 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Bf2 14. Kh1 g6 15. Qh7 Ke8
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 Bc5 7. O-O d6 8. h3 b6 9. Ba6 Bb4 10. Ng5 Bxa6 11. Nxh7 Be1 12. f4 Ke7 13. Qh5 Bf2 14. Kh1 g6 15. Qh7 Ke8 - Oct 24 10:47 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 13. Qh5 Bf2 14. Kh1 g6 15. Qh7
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 Bc5 7. O-O d6 8. h3 b6 9. Ba6 Bb4 10. Ng5 Bxa6 11. Nxh7 Be1 12. f4 Ke7 13. Qh5 Bf2 14. Kh1 g6 15. Qh7 - Oct 24 10:47 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Ke7 13. Qh5 Bf2 14. Kh1 g6
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 Bc5 7. O-O d6 8. h3 b6 9. Ba6 Bb4 10. Ng5 Bxa6 11. Nxh7 Be1 12. f4 Ke7 13. Qh5 Bf2 14. Kh1 g6 - Oct 24 10:47 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 12. f4 Ke7 13. Qh5 Bf2 14. Kh1
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 Bc5 7. O-O d6 8. h3 b6 9. Ba6 Bb4 10. Ng5 Bxa6 11. Nxh7 Be1 12. f4 Ke7 13. Qh5 Bf2 14. Kh1 - Oct 24 10:47 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Be1 12. f4 Ke7 13. Qh5 Bf2
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 Bc5 7. O-O d6 8. h3 b6 9. Ba6 Bb4 10. Ng5 Bxa6 11. Nxh7 Be1 12. f4 Ke7 13. Qh5 Bf2