81.1M
positions
15.6M
practically solved
295.26T
engine nodes
2.2M
analyses
819
in queue
12
active workers
58
active cores
48.6M
nodes / sec
25.2
positions / min
82
proof number
4,106
disproof number
Root conquest: 0/20 first moves solved · 19.3% of tree positions solved · last 24h: 82,991 closures, 4.59T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 over 219 open obligations, of which 41 (18.7%) 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 27s (median of 1) · measured at 2026-10-11 01:00 UTC
Closures by source, last 24h (82991 of 82991 labelled): USER 99.9% (82932) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.1% (59) · last 7d (1663817 of 1663817): USER 99.0% (1647925) · FILL 0.1% (2071) · AUTO 0.7% (11952) · SOLVE 0.0% (0) · NONE 0.1% (1869). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. e4 c6 2. Nf3 e5 … hxg3 28. h4 Kh8 29. Red1 Bd2 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 c6 … Ne7 9. Bb5 Nc6 10. d4 Kf8 (User) · 128.0M nodes · randomchampgamer-2026PC-atomicdb
- 1. Nf3 f6 2. Nc3 c6 … Ne7 9. Bb5 Nc6 10. d4 Kf7 (User) · 128.0M nodes · RickEdinson-MSI-atomicdb
- 1. Nf3 f6 2. Nc3 c6 … Nc6 8. Nxd6 Ne7 9. Bb5 Nc6 (User) · 512.0M nodes · Torom-torsten-pc-atomicdb#0
- 1. Nf3 f6 2. Nc3 c6 … 8. Nxd6 Ne7 9. Bb5 Nc6 10. b3 (User) · 128.0M nodes · Torom-torsten-pc-atomicdb#1
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 | 1114 | 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 40.8% of the fleet | 1.87T | 12,464 |
| 2 | BManBJ 27.4% of the fleet | 1.26T | 6,140 |
| 3 | randomchampgamer 14.3% of the fleet | 655.82B | 2,657 |
| 4 | RickEdinson 9.2% of the fleet | 422.53B | 1,881 |
| 5 | MoNiKaMaDnEsS 8.3% of the fleet | 383.23B | 1,671 |
| 6 | soothdest <0.1% of the fleet | 25.3M | 4 |
6 accounts · 4.59T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 30.6% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 15.5% of the fleet | 45.83T | 317,532 |
| 3 | tenzink 14.5% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.6% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 6.0% of the fleet | 17.61T | 126,900 |
| 6 | RickEdinson 4.0% of the fleet | 11.69T | 76,925 |
| 7 | Torom 3.8% of the fleet | 11.13T | 80,946 |
| 8 | JackIV 3.4% of the fleet | 10.06T | 67,859 |
| 9 | gannet 2.4% of the fleet | 7.24T | 46,848 |
| 10 | MoNiKaMaDnEsS 2.3% of the fleet | 6.69T | 44,341 |
and 25 more.
35 accounts · 295.38T 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 11 01:37 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 c6 … 9. Bb5 Nc6 10. d4 Qa5 11. Qd2
1. Nf3 f6 2. Nd4 c6 3. Nc3 e6 4. e3 g6 5. Ndb5 cxb5 6. Nb5 Bd6 7. g3 Nc6 8. Nxd6 Ne7 9. Bb5 Nc6 10. d4 Qa5 11. Qd2 - Oct 11 01:37 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 c6 … 10. d4 Qa5 11. Kf1 Qe1 12. Kg2
1. Nf3 f6 2. Nd4 c6 3. Nc3 e6 4. e3 g6 5. Ndb5 cxb5 6. Nb5 Bd6 7. g3 Nc6 8. Nxd6 Ne7 9. Bb5 Nc6 10. d4 Qa5 11. Kf1 Qe1 12. Kg2 - Oct 11 01:37 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 c6 … Nc6 10. d4 Qa5 11. Kf1 Qe1
1. Nf3 f6 2. Nd4 c6 3. Nc3 e6 4. e3 g6 5. Ndb5 cxb5 6. Nb5 Bd6 7. g3 Nc6 8. Nxd6 Ne7 9. Bb5 Nc6 10. d4 Qa5 11. Kf1 Qe1 - Oct 11 01:37 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 c6 … 9. Bb5 Nc6 10. d4 Qa5 11. Kf1
1. Nf3 f6 2. Nd4 c6 3. Nc3 e6 4. e3 g6 5. Ndb5 cxb5 6. Nb5 Bd6 7. g3 Nc6 8. Nxd6 Ne7 9. Bb5 Nc6 10. d4 Qa5 11. Kf1 - Oct 11 01:37 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 c6 … 10. d4 Qa5 11. Ke2 Qd2 12. Kf1
1. Nf3 f6 2. Nd4 c6 3. Nc3 e6 4. e3 g6 5. Ndb5 cxb5 6. Nb5 Bd6 7. g3 Nc6 8. Nxd6 Ne7 9. Bb5 Nc6 10. d4 Qa5 11. Ke2 Qd2 12. Kf1 - Oct 11 01:37 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 c6 … Nc6 10. d4 Qa5 11. Ke2 Qd2
1. Nf3 f6 2. Nd4 c6 3. Nc3 e6 4. e3 g6 5. Ndb5 cxb5 6. Nb5 Bd6 7. g3 Nc6 8. Nxd6 Ne7 9. Bb5 Nc6 10. d4 Qa5 11. Ke2 Qd2 - Oct 11 01:37 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 c6 … 9. Bb5 Nc6 10. d4 Qa5 11. Ke2
1. Nf3 f6 2. Nd4 c6 3. Nc3 e6 4. e3 g6 5. Ndb5 cxb5 6. Nb5 Bd6 7. g3 Nc6 8. Nxd6 Ne7 9. Bb5 Nc6 10. d4 Qa5 11. Ke2 - Oct 11 01:37 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nd4 c6 … Ne7 9. Bb5 Nc6 10. d4 Nb8
1. Nf3 f6 2. Nd4 c6 3. Nc3 e6 4. e3 g6 5. Ndb5 cxb5 6. Nb5 Bd6 7. g3 Nc6 8. Nxd6 Ne7 9. Bb5 Nc6 10. d4 Nb8 - Oct 11 01:37 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 c6 … 9. Bb5 Nc6 10. d4 Nb8 11. Qh5
1. Nf3 f6 2. Nd4 c6 3. Nc3 e6 4. e3 g6 5. Ndb5 cxb5 6. Nb5 Bd6 7. g3 Nc6 8. Nxd6 Ne7 9. Bb5 Nc6 10. d4 Nb8 11. Qh5 - Oct 11 01:37 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nd4 c6 … Ne7 9. Bb5 Nc6 10. d4 Ne7
1. Nf3 f6 2. Nd4 c6 3. Nc3 e6 4. e3 g6 5. Ndb5 cxb5 6. Nb5 Bd6 7. g3 Nc6 8. Nxd6 Ne7 9. Bb5 Nc6 10. d4 Ne7 - Oct 11 01:37 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 c6 … 9. Bb5 Nc6 10. d4 Ne7 11. Qh5
1. Nf3 f6 2. Nd4 c6 3. Nc3 e6 4. e3 g6 5. Ndb5 cxb5 6. Nb5 Bd6 7. g3 Nc6 8. Nxd6 Ne7 9. Bb5 Nc6 10. d4 Ne7 11. Qh5 - Oct 11 01:37 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nd4 c6 … Ne7 9. Bb5 Nc6 10. d4 Ne5
1. Nf3 f6 2. Nd4 c6 3. Nc3 e6 4. e3 g6 5. Ndb5 cxb5 6. Nb5 Bd6 7. g3 Nc6 8. Nxd6 Ne7 9. Bb5 Nc6 10. d4 Ne5