85.4M
positions
16.3M
practically solved
312.45T
engine nodes
2.4M
analyses
40
in queue
6
active workers
36
active cores
9.0M
nodes / sec
34.1
positions / min
156
proof number
4,658
disproof number
Root conquest: 0/20 first moves solved · 19.1% of tree positions solved · last 24h: 100,733 closures, 2.35T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 over 210 open obligations, of which 39 (18.6%) sit at or below dn 2, one unanswered question from falling over · 0 open nodes on impossible numbers · measured at 2026-10-16 15:00 UTC
Closures by source, last 24h (100730 of 100730 labelled): USER 67.0% (67510) · FILL 1.9% (1937) · AUTO 31.0% (31227) · SOLVE 0.0% (0) · NONE 0.1% (56) · last 7d (808827 of 808827): USER 90.2% (729184) · FILL 0.7% (5922) · AUTO 9.1% (73237) · SOLVE 0.0% (0) · NONE 0.1% (484). 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 Nh6 3. g4 c6 4. d4 e6 5. Qd3 Ng8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 Nh6 3. g4 c6 4. d4 e6 5. Qd3 Ba3 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. Nc3 Nh6 3. g4 c6 4. d4 e6 5. Qd3 Nf7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 d6 2. Ng5 f5 … 11. Ba6 d5 12. f4 Bb4 13. Nc3 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nh3 d5 2. Nc3 h6 … a6 13. Bb5 exd4 14. O-O g4 (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 | 1068 | 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 60.3% of the fleet | 1.42T | 16,373 |
| 2 | RickEdinson 18.0% of the fleet | 423.79B | 4,539 |
| 3 | MoNiKaMaDnEsS 14.8% of the fleet | 347.76B | 3,575 |
| 4 | randomchampgamer 6.9% of the fleet | 162.64B | 950 |
4 accounts · 2.35T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 28.9% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 16.7% of the fleet | 52.27T | 371,678 |
| 3 | tenzink 13.7% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.0% 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 4.5% of the fleet | 13.97T | 94,494 |
| 8 | JackIV 3.2% of the fleet | 10.06T | 67,859 |
| 9 | MoNiKaMaDnEsS 2.6% of the fleet | 8.24T | 56,761 |
| 10 | gannet 2.3% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 312.46T 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 15:11 Solved: BLACK_WIN via MINIMAXview
1. e3 d5 2. Qf3 Nf6 3. Nh3 Bxh3 4. Bb5 c6 5. Qe2
1. e3 d5 2. Qf3 Nf6 3. Nh3 Bxh3 4. Bb5 c6 5. Qe2 - Oct 16 15:11 Solved: BLACK_WIN via MATE_PVview
1. e3 d5 2. Qf3 Nf6 … 4. Bb5 c6 5. Qe2 Ne4 6. O-O
1. e3 d5 2. Qf3 Nf6 3. Nh3 Bxh3 4. Bb5 c6 5. Qe2 Ne4 6. O-O - Oct 16 15:11 Solved: BLACK_WIN via MATE_PVview
1. e3 d5 2. Qf3 Nf6 3. Nh3 Bxh3 4. Bb5 c6 5. Qe2 Ne4
1. e3 d5 2. Qf3 Nf6 3. Nh3 Bxh3 4. Bb5 c6 5. Qe2 Ne4 - Oct 16 15:11 Solved: BLACK_WIN via MINIMAXview
1. e3 d5 2. Qf3 Nf6 3. Nh3 Bxh3 4. Bb5 c6 5. Qd1
1. e3 d5 2. Qf3 Nf6 3. Nh3 Bxh3 4. Bb5 c6 5. Qd1 - Oct 16 15:11 Solved: BLACK_WIN via MATE_PVview
1. e3 d5 2. Qf3 Nf6 … 4. Bb5 c6 5. Qd1 Ne4 6. Bxc6
1. e3 d5 2. Qf3 Nf6 3. Nh3 Bxh3 4. Bb5 c6 5. Qd1 Ne4 6. Bxc6 - Oct 16 15:11 Solved: BLACK_WIN via MATE_PVview
1. e3 d5 2. Qf3 Nf6 3. Nh3 Bxh3 4. Bb5 c6 5. Qd1 Ne4
1. e3 d5 2. Qf3 Nf6 3. Nh3 Bxh3 4. Bb5 c6 5. Qd1 Ne4 - Oct 16 15:11 Solved: BLACK_WIN via MINIMAXview
1. e3 e6 2. Qh5 g6 3. Qa5 Qh4 4. Be2
1. e3 e6 2. Qh5 g6 3. Qa5 Qh4 4. Be2 - Oct 16 15:11 Solved: WHITE_WIN via MINIMAXview
1. e3 e6 2. Qh5 g6 3. Qa5 Bb4 4. c3 Bf8
1. e3 e6 2. Qh5 g6 3. Qa5 Bb4 4. c3 Bf8 - Oct 16 15:11 Solved: WHITE_WIN via MATE_PVview
1. e3 e6 2. Qh5 g6 3. Qa5 Bb4 4. c3 Bf8 5. Bb5 Nc6
1. e3 e6 2. Qh5 g6 3. Qa5 Bb4 4. c3 Bf8 5. Bb5 Nc6 - Oct 16 15:11 Solved: WHITE_WIN via MATE_PVview
1. e3 e6 2. Qh5 g6 3. Qa5 Bb4 4. c3 Bf8 5. Bb5
1. e3 e6 2. Qh5 g6 3. Qa5 Bb4 4. c3 Bf8 5. Bb5 - Oct 16 15:11 Solved: WHITE_WIN via MINIMAXview
1. c3 Nf6 2. e4 h6 3. Bb5 c5
1. c3 Nf6 2. e4 h6 3. Bb5 c5 - Oct 16 15:11 Solved: WHITE_WIN via MATE_PVview
1. c3 Nf6 2. e4 h6 … Nxe4 6. Qh5 g6 7. Qd5 d6
1. c3 Nf6 2. e4 h6 3. Bb5 c5 4. Nf3 Nc6 5. Ne5 Nxe4 6. Qh5 g6 7. Qd5 d6