80.5M
positions
15.6M
practically solved
292.34T
engine nodes
2.2M
analyses
2,415
in queue
7
active workers
42
active cores
29.7M
nodes / sec
5.3
positions / min
82
proof number
4,106
disproof number
Root conquest: 0/20 first moves solved · 19.3% of tree positions solved · last 24h: 188,563 closures, 4.21T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 70 over 220 open obligations, of which 41 (18.6%) 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 16.3h (median of 4) · measured at 2026-10-10 14:00 UTC
Closures by source, last 24h (188434 of 188434 labelled): USER 100.0% (188382) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.0% (52) · last 7d (1665261 of 1665261): USER 99.0% (1649025) · FILL 0.1% (2071) · AUTO 0.7% (11952) · SOLVE 0.0% (0) · NONE 0.1% (2213). 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 … 11. c4 Nh6 12. cxd5 O-O-O 13. d5 (User) · 512.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 Nh6 … e6 5. e4 g6 6. Ng5 Ng8 (User) · 10.00B nodes · BManBJ-Blake-atomicdb#1
- 1. Nh3 d5 2. Nc3 h6 … 8. Be2 Nd7 9. b4 Ndf6 10. O-O (User) · 512.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. Nc3 Nh6 … e6 5. e4 g6 6. Ng5 Rg8 (User) · 10.00B nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nh3 d5 2. Nc3 h6 … O-O-O 13. h3 Kb8 14. a4 dxe4 (User) · 512.0M 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 | 1127 | 2 | |
| g1h3 | unsolved | 821 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| e2e4 | unsolved | 400 | 2 | |
| d2d4 | unsolved | 387 | 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 32.6% of the fleet | 1.38T | 9,439 |
| 2 | BManBJ 31.6% of the fleet | 1.33T | 6,778 |
| 3 | randomchampgamer 15.9% of the fleet | 671.59B | 3,416 |
| 4 | RickEdinson 10.4% of the fleet | 437.51B | 2,154 |
| 5 | MoNiKaMaDnEsS 9.4% of the fleet | 395.76B | 1,941 |
| 6 | soothdest <0.1% of the fleet | 25.3M | 4 |
6 accounts · 4.21T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 30.9% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 15.5% of the fleet | 45.27T | 314,423 |
| 3 | tenzink 14.6% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.7% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 5.9% of the fleet | 17.33T | 125,559 |
| 6 | RickEdinson 3.9% of the fleet | 11.51T | 75,988 |
| 7 | JackIV 3.4% of the fleet | 10.06T | 67,859 |
| 8 | Torom 3.2% of the fleet | 9.26T | 68,482 |
| 9 | gannet 2.5% of the fleet | 7.24T | 46,848 |
| 10 | MoNiKaMaDnEsS 2.3% of the fleet | 6.62T | 44,118 |
and 25 more.
35 accounts · 292.43T 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 · 17 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 10 14:51 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Bg3 13. Kh1 Kd8 14. Qg7 Bxf2
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O Qa5 7. Ng5 fxg5 8. Qh5 g6 9. Qg5 Bd6 10. h3 Nf6 11. Qh6 Ng4 12. hxg4 Bg3 13. Kh1 Kd8 14. Qg7 Bxf2 - Oct 10 14:51 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 12. hxg4 Bg3 13. Kh1 Kd8 14. Qg7
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O Qa5 7. Ng5 fxg5 8. Qh5 g6 9. Qg5 Bd6 10. h3 Nf6 11. Qh6 Ng4 12. hxg4 Bg3 13. Kh1 Kd8 14. Qg7 - Oct 10 14:51 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Ng4 12. hxg4 Bg3 13. Kh1 Kd8
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O Qa5 7. Ng5 fxg5 8. Qh5 g6 9. Qg5 Bd6 10. h3 Nf6 11. Qh6 Ng4 12. hxg4 Bg3 13. Kh1 Kd8 - Oct 10 14:51 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 11. Qh6 Ng4 12. hxg4 Bg3 13. Kh1
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O Qa5 7. Ng5 fxg5 8. Qh5 g6 9. Qg5 Bd6 10. h3 Nf6 11. Qh6 Ng4 12. hxg4 Bg3 13. Kh1 - Oct 10 14:51 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Nf6 11. Qh6 Ng4 12. hxg4 Bg3
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O Qa5 7. Ng5 fxg5 8. Qh5 g6 9. Qg5 Bd6 10. h3 Nf6 11. Qh6 Ng4 12. hxg4 Bg3 - Oct 10 14:51 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 10. h3 Nf6 11. Qh6 Ng4 12. hxg4
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O Qa5 7. Ng5 fxg5 8. Qh5 g6 9. Qg5 Bd6 10. h3 Nf6 11. Qh6 Ng4 12. hxg4 - Oct 10 14:51 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Bd6 10. h3 Nf6 11. Qh6 Ng4
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O Qa5 7. Ng5 fxg5 8. Qh5 g6 9. Qg5 Bd6 10. h3 Nf6 11. Qh6 Ng4 - Oct 10 14:51 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 9. Qg5 Bd6 10. h3 Nf6 11. Qh6
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O Qa5 7. Ng5 fxg5 8. Qh5 g6 9. Qg5 Bd6 10. h3 Nf6 11. Qh6 - Oct 10 14:51 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … g6 9. Qg5 Bd6 10. h3 Nf6
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O Qa5 7. Ng5 fxg5 8. Qh5 g6 9. Qg5 Bd6 10. h3 Nf6 - Oct 10 14:51 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 8. Qh5 g6 9. Qg5 Bd6 10. h3
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O Qa5 7. Ng5 fxg5 8. Qh5 g6 9. Qg5 Bd6 10. h3 - Oct 10 14:51 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … fxg5 8. Qh5 g6 9. Qg5 Bd6
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O Qa5 7. Ng5 fxg5 8. Qh5 g6 9. Qg5 Bd6 - Oct 10 14:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … fxg5 8. Qh5 g6 9. Qd5 a6
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O Qa5 7. Ng5 fxg5 8. Qh5 g6 9. Qd5 a6