101.2M
positions
21.3M
practically solved
368.83T
engine nodes
2.8M
analyses
1,054
in queue
5
active workers
28
active cores
29.2M
nodes / sec
11.3
positions / min
107
proof number
4,809
disproof number
Root conquest: 0/20 first moves solved · 21.0% of tree positions solved · last 24h: 137,842 closures, 3.63T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 over 203 open obligations, of which 37 (18.2%) sit at or below dn 2, one unanswered question from falling over · 0 open nodes on impossible numbers · measured at 2026-10-27 08:00 UTC
Closures by source, last 24h (137842 of 137842 labelled): USER 94.6% (130387) · FILL 0.7% (942) · AUTO 4.7% (6479) · SOLVE 0.0% (0) · NONE 0.0% (34) · last 7d (3807078 of 3807078): USER 99.3% (3780327) · FILL 0.3% (11599) · AUTO 0.4% (14683) · SOLVE 0.0% (0) · NONE 0.0% (469). 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 c6 … cxd5 5. Ng5 Nc6 6. Nh3 Bxh3 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#0
- 1. Nf3 f6 2. e4 c6 … 7. Nf7 Nc6 8. g4 Be6 9. Qa4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. e4 c6 … 7. Nf7 Nc6 8. g4 Be6 9. Ba6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. e4 c6 … 7. Nf7 Nc6 8. g4 Be6 9. b3 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. e4 c6 … 4. Nd5 cxd5 5. Bb5 Nc6 6. e5 (User) · 128.0M nodes · RickEdinson-MSI-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 | 1184 | 2 | |
| g1h3 | unsolved | 810 | 2 | |
| e2e3 | unsolved | 469 | 3 | |
| d2d4 | unsolved | 405 | 2 | |
| e2e4 | unsolved | 401 | 2 | |
| b1c3 | unsolved | 138 | 2 | |
| b1a3 | unsolved | 0 | 3 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b2b4 | unsolved | -59 | 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 48.1% of the fleet | 1.74T | 9,917 |
| 2 | Torom 28.1% of the fleet | 1.02T | 6,368 |
| 3 | RickEdinson 13.3% of the fleet | 483.38B | 2,790 |
| 4 | MoNiKaMaDnEsS 10.5% of the fleet | 379.20B | 2,085 |
4 accounts · 3.63T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 24.5% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 19.2% of the fleet | 71.00T | 499,290 |
| 3 | Torom 12.3% of the fleet | 45.21T | 328,657 |
| 4 | tenzink 11.6% of the fleet | 42.83T | 349,427 |
| 5 | auranvesdranor 8.5% of the fleet | 31.40T | 228,002 |
| 6 | randomchampgamer 5.4% of the fleet | 19.85T | 140,897 |
| 7 | RickEdinson 5.2% of the fleet | 19.05T | 125,581 |
| 8 | MoNiKaMaDnEsS 3.1% of the fleet | 11.27T | 77,826 |
| 9 | JackIV 2.7% of the fleet | 10.06T | 67,859 |
| 10 | gannet 2.0% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 368.89T 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 27 08:35 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … 10. Bf1 Qh4 11. Ke2 Qf2 12. Kd3
1. Nf3 f6 2. e4 c6 3. Nc3 d6 4. Nd5 cxd5 5. Ng5 Qa5 6. b4 Nc6 7. Nf7 Qh5 8. f3 Bh3 9. Be2 Bxg2 10. Bf1 Qh4 11. Ke2 Qf2 12. Kd3 - Oct 27 08:35 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … Bxg2 10. Bf1 Qh4 11. Ke2 Qf2
1. Nf3 f6 2. e4 c6 3. Nc3 d6 4. Nd5 cxd5 5. Ng5 Qa5 6. b4 Nc6 7. Nf7 Qh5 8. f3 Bh3 9. Be2 Bxg2 10. Bf1 Qh4 11. Ke2 Qf2 - Oct 27 08:35 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … 9. Be2 Bxg2 10. Bf1 Qh4 11. Ke2
1. Nf3 f6 2. e4 c6 3. Nc3 d6 4. Nd5 cxd5 5. Ng5 Qa5 6. b4 Nc6 7. Nf7 Qh5 8. f3 Bh3 9. Be2 Bxg2 10. Bf1 Qh4 11. Ke2 - Oct 27 08:35 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … Bh3 9. Be2 Bxg2 10. Bf1 Qh4
1. Nf3 f6 2. e4 c6 3. Nc3 d6 4. Nd5 cxd5 5. Ng5 Qa5 6. b4 Nc6 7. Nf7 Qh5 8. f3 Bh3 9. Be2 Bxg2 10. Bf1 Qh4 - Oct 27 08:35 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … 8. f3 Bh3 9. Be2 Bxg2 10. Bf1
1. Nf3 f6 2. e4 c6 3. Nc3 d6 4. Nd5 cxd5 5. Ng5 Qa5 6. b4 Nc6 7. Nf7 Qh5 8. f3 Bh3 9. Be2 Bxg2 10. Bf1 - Oct 27 08:35 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … Bh3 9. Be2 Bxg2 10. Bc4 Qh3
1. Nf3 f6 2. e4 c6 3. Nc3 d6 4. Nd5 cxd5 5. Ng5 Qa5 6. b4 Nc6 7. Nf7 Qh5 8. f3 Bh3 9. Be2 Bxg2 10. Bc4 Qh3 - Oct 27 08:35 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … 8. f3 Bh3 9. Be2 Bxg2 10. Bc4
1. Nf3 f6 2. e4 c6 3. Nc3 d6 4. Nd5 cxd5 5. Ng5 Qa5 6. b4 Nc6 7. Nf7 Qh5 8. f3 Bh3 9. Be2 Bxg2 10. Bc4 - Oct 27 08:35 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … 10. d4 Qh3 11. Bc4 Qf1 12. Kd2
1. Nf3 f6 2. e4 c6 3. Nc3 d6 4. Nd5 cxd5 5. Ng5 Qa5 6. b4 Nc6 7. Nf7 Qh5 8. f3 Bh3 9. Be2 Bxg2 10. d4 Qh3 11. Bc4 Qf1 12. Kd2 - Oct 27 08:35 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … Bxg2 10. d4 Qh3 11. Bc4 Qf1
1. Nf3 f6 2. e4 c6 3. Nc3 d6 4. Nd5 cxd5 5. Ng5 Qa5 6. b4 Nc6 7. Nf7 Qh5 8. f3 Bh3 9. Be2 Bxg2 10. d4 Qh3 11. Bc4 Qf1 - Oct 27 08:35 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … 9. Be2 Bxg2 10. d4 Qh3 11. Bc4
1. Nf3 f6 2. e4 c6 3. Nc3 d6 4. Nd5 cxd5 5. Ng5 Qa5 6. b4 Nc6 7. Nf7 Qh5 8. f3 Bh3 9. Be2 Bxg2 10. d4 Qh3 11. Bc4 - Oct 27 08:35 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … Bh3 9. Be2 Bxg2 10. d4 Qh3
1. Nf3 f6 2. e4 c6 3. Nc3 d6 4. Nd5 cxd5 5. Ng5 Qa5 6. b4 Nc6 7. Nf7 Qh5 8. f3 Bh3 9. Be2 Bxg2 10. d4 Qh3 - Oct 27 08:35 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … 8. f3 Bh3 9. Be2 Bxg2 10. d4
1. Nf3 f6 2. e4 c6 3. Nc3 d6 4. Nd5 cxd5 5. Ng5 Qa5 6. b4 Nc6 7. Nf7 Qh5 8. f3 Bh3 9. Be2 Bxg2 10. d4