84.8M
positions
16.2M
practically solved
311.26T
engine nodes
2.4M
analyses
0
in queue
6
active workers
36
active cores
4.6M
nodes / sec
37.3
positions / min
124
proof number
4,623
disproof number
Root conquest: 0/20 first moves solved · 19.1% of tree positions solved · last 24h: 144,954 closures, 2.61T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 over 212 open obligations, of which 40 (18.9%) 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 37s (median of 1) · measured at 2026-10-16 02:00 UTC
Closures by source, last 24h (144954 of 144954 labelled): USER 81.2% (117742) · FILL 1.6% (2310) · AUTO 17.1% (24836) · SOLVE 0.0% (0) · NONE 0.0% (66) · last 7d (881912 of 881912): USER 93.8% (827099) · FILL 0.6% (4974) · AUTO 5.6% (49360) · SOLVE 0.0% (0) · NONE 0.1% (479). 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 … 11. f4 Nh6 12. f5 O-O 13. g4 (Auto) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … 10. Bxc6 g5 11. Kh1 g4 12. Nxf5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. e4 e6 … Ba3 8. bxa3 d6 9. O-O h5 (Auto) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. e4 e6 … Qxg5 13. dxe6 Nd4 14. Kf1 d5 (Auto) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … 11. f4 Nh6 12. f5 O-O 13. Bg5 (Auto) · 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 | 1094 | 2 | |
| g1h3 | unsolved | 763 | 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 53.4% of the fleet | 1.40T | 13,445 |
| 2 | randomchampgamer 17.4% of the fleet | 455.56B | 3,749 |
| 3 | RickEdinson 16.4% of the fleet | 428.77B | 3,932 |
| 4 | MoNiKaMaDnEsS 12.8% of the fleet | 333.75B | 2,809 |
| 5 | NeoArcturus <0.1% of the fleet | 144.9M | 4 |
5 accounts · 2.61T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 29.0% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 16.6% of the fleet | 51.55T | 361,217 |
| 3 | tenzink 13.8% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.1% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 6.4% of the fleet | 19.85T | 140,897 |
| 6 | Torom 5.0% of the fleet | 15.70T | 113,354 |
| 7 | RickEdinson 4.4% of the fleet | 13.77T | 91,705 |
| 8 | JackIV 3.2% of the fleet | 10.06T | 67,859 |
| 9 | MoNiKaMaDnEsS 2.6% of the fleet | 8.05T | 54,259 |
| 10 | gannet 2.3% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 311.34T 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 16 02:52 Solved: BLACK_WIN via MATE_PVview
1. e3 f5 2. Bc4 e6 … 4. Qg4 g6 5. Bd3 Bb4 6. a3
1. e3 f5 2. Bc4 e6 3. Bb5 c6 4. Qg4 g6 5. Bd3 Bb4 6. a3 - Oct 16 02:52 Solved: WHITE_WIN via MINIMAXview
1. e3 Nf6 2. Qf3 e6 3. Bd3 Bb4 4. c3 Bxc3 5. Nh3 Rg8
1. e3 Nf6 2. Qf3 e6 3. Bd3 Bb4 4. c3 Bxc3 5. Nh3 Rg8 - Oct 16 02:52 Solved: WHITE_WIN via MATE_PVview
1. e3 Nf6 2. Qf3 e6 … Bxc3 5. Nh3 Rg8 6. Ng5 h6
1. e3 Nf6 2. Qf3 e6 3. Bd3 Bb4 4. c3 Bxc3 5. Nh3 Rg8 6. Ng5 h6 - Oct 16 02:52 Solved: WHITE_WIN via MATE_PVview
1. e3 Nf6 2. Qf3 e6 … 4. c3 Bxc3 5. Nh3 Rg8 6. Ng5
1. e3 Nf6 2. Qf3 e6 3. Bd3 Bb4 4. c3 Bxc3 5. Nh3 Rg8 6. Ng5 - Oct 16 02:52 Solved: WHITE_WIN via MINIMAXview
1. e3 e6 2. Qh5 g6 3. Nc3 Bb4 4. Nf3 Qh4 5. g3 a5
1. e3 e6 2. Qh5 g6 3. Nc3 Bb4 4. Nf3 Qh4 5. g3 a5 - Oct 16 02:52 Solved: WHITE_WIN via MATE_PVview
1. e3 e6 2. Qh5 g6 … Qh4 5. g3 a5 6. Ne5 Qxh5
1. e3 e6 2. Qh5 g6 3. Nc3 Bb4 4. Nf3 Qh4 5. g3 a5 6. Ne5 Qxh5 - Oct 16 02:52 Solved: WHITE_WIN via MATE_PVview
1. e3 e6 2. Qh5 g6 … 4. Nf3 Qh4 5. g3 a5 6. Ne5
1. e3 e6 2. Qh5 g6 3. Nc3 Bb4 4. Nf3 Qh4 5. g3 a5 6. Ne5 - Oct 16 02:52 Solved: WHITE_WIN via MINIMAXview
1. Nh3 d6 2. e3 Nf6 3. Qf3 Nc6 4. Bb5 Bd7
1. Nh3 d6 2. e3 Nf6 3. Qf3 Nc6 4. Bb5 Bd7 - Oct 16 02:52 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d6 2. e3 Nf6 … b6 12. Qa6 Ke8 13. Qb7 h5
1. Nh3 d6 2. e3 Nf6 3. Qf3 Nc6 4. Bb5 Bd7 5. Bxc6 Qc8 6. Ng5 Kd8 7. Ne6 Qxe6 8. Qf5 e6 9. Qg5 f6 10. Qb5 c6 11. Qa5 b6 12. Qa6 Ke8 13. Qb7 h5 - Oct 16 02:52 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d6 2. e3 Nf6 … 11. Qa5 b6 12. Qa6 Ke8 13. Qb7
1. Nh3 d6 2. e3 Nf6 3. Qf3 Nc6 4. Bb5 Bd7 5. Bxc6 Qc8 6. Ng5 Kd8 7. Ne6 Qxe6 8. Qf5 e6 9. Qg5 f6 10. Qb5 c6 11. Qa5 b6 12. Qa6 Ke8 13. Qb7 - Oct 16 02:52 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d6 2. e3 Nf6 … c6 11. Qa5 b6 12. Qa6 Ke8
1. Nh3 d6 2. e3 Nf6 3. Qf3 Nc6 4. Bb5 Bd7 5. Bxc6 Qc8 6. Ng5 Kd8 7. Ne6 Qxe6 8. Qf5 e6 9. Qg5 f6 10. Qb5 c6 11. Qa5 b6 12. Qa6 Ke8 - Oct 16 02:52 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d6 2. e3 Nf6 … 10. Qb5 c6 11. Qa5 b6 12. Qa6
1. Nh3 d6 2. e3 Nf6 3. Qf3 Nc6 4. Bb5 Bd7 5. Bxc6 Qc8 6. Ng5 Kd8 7. Ne6 Qxe6 8. Qf5 e6 9. Qg5 f6 10. Qb5 c6 11. Qa5 b6 12. Qa6