102.6M
positions
21.6M
practically solved
376.42T
engine nodes
2.8M
analyses
1,302
in queue
active workers
28
active cores
25.0M
nodes / sec
6.1
positions / min
107
proof number
4,824
disproof number
Root conquest: 0/20 first moves solved · 21.1% of tree positions solved · last 24h: 117,582 closures, 3.79T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 72 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 · positions a visitor asked for close in 7.9m (median of 42) · measured at 2026-10-29 06:00 UTC
Closures by source, last 24h (117582 of 117582 labelled): USER 99.6% (117139) · FILL 0.2% (287) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.1% (156) · last 7d (2363177 of 2363177): USER 99.1% (2341354) · FILL 0.3% (6665) · AUTO 0.6% (14609) · SOLVE 0.0% (0) · NONE 0.0% (549). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing all workers
- 1. Nf3 d6 2. Ng5 f5 … a5 10. O-O Na6 11. a3 e5 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#0
- 1. Nf3 d6 2. Ng5 f5 … a5 10. O-O Na6 11. a3 Nb4 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … a5 10. O-O Na6 11. a3 b6 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 d6 2. Ng5 f5 … a5 10. O-O Na6 11. a3 c5 (User) · 512.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. e4 c6 … Bxg5 10. c4 Nh6 11. Bd2 Kf8 (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 | 1074 | 2 | |
| g1h3 | unsolved | 820 | 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 | Torom 48.4% of the fleet | 1.84T | 12,334 |
| 2 | BManBJ 36.2% of the fleet | 1.37T | 4,812 |
| 3 | RickEdinson 12.9% of the fleet | 490.50B | 3,041 |
| 4 | MoNiKaMaDnEsS 2.4% of the fleet | 92.74B | 572 |
4 accounts · 3.79T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 24.0% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 19.7% of the fleet | 74.07T | 513,801 |
| 3 | Torom 12.8% of the fleet | 48.34T | 349,997 |
| 4 | tenzink 11.4% of the fleet | 42.83T | 349,427 |
| 5 | auranvesdranor 8.3% of the fleet | 31.40T | 228,002 |
| 6 | RickEdinson 5.3% of the fleet | 20.01T | 131,315 |
| 7 | randomchampgamer 5.3% of the fleet | 19.85T | 140,897 |
| 8 | MoNiKaMaDnEsS 3.1% of the fleet | 11.71T | 80,608 |
| 9 | JackIV 2.7% of the fleet | 10.06T | 67,859 |
| 10 | gannet 1.9% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 376.50T 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 29 06:53 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 7. bxa3 Nh6 8. h3 Qa5 9. Bd2
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Ba3 6. Bb5 Nc6 7. bxa3 Nh6 8. h3 Qa5 9. Bd2 - Oct 29 06:53 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 7. bxa3 Qa5 8. Qd2 Nh6 9. h3
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Ba3 6. Bb5 Nc6 7. bxa3 Qa5 8. Qd2 Nh6 9. h3 - Oct 29 06:53 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 7. bxa3 Nh6 8. h3 Qa5 9. Kf1
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Ba3 6. Bb5 Nc6 7. bxa3 Nh6 8. h3 Qa5 9. Kf1 - Oct 29 06:53 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 8. h3 Qa5 9. Ke2 Qd2 10. Kf1
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Ba3 6. Bb5 Nc6 7. bxa3 Nh6 8. h3 Qa5 9. Ke2 Qd2 10. Kf1 - Oct 29 06:53 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Nh6 8. h3 Qa5 9. Ke2 Qd2
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Ba3 6. Bb5 Nc6 7. bxa3 Nh6 8. h3 Qa5 9. Ke2 Qd2 - Oct 29 06:53 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 7. bxa3 Nh6 8. h3 Qa5 9. Ke2
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Ba3 6. Bb5 Nc6 7. bxa3 Nh6 8. h3 Qa5 9. Ke2 - Oct 29 06:52 Solved: BLACK_WIN via MINIMAXview
1. c4 Nc6 2. e4 e6 3. Nh3
1. c4 Nc6 2. e4 e6 3. Nh3 - Oct 29 06:52 Solved: BLACK_WIN via MATE_PVview
1. c4 Nc6 2. e4 e6 … 7. dxe3 Qf3 8. Kd2 Qe2 9. Kc3
1. c4 Nc6 2. e4 e6 3. g3 Qh4 4. Nh3 Qf6 5. Qf3 Bc5 6. Kd1 Be3 7. dxe3 Qf3 8. Kd2 Qe2 9. Kc3 - Oct 29 06:52 Solved: BLACK_WIN via MATE_PVview
1. c4 Nc6 2. e4 e6 … Be3 7. dxe3 Qf3 8. Kd2 Qe2
1. c4 Nc6 2. e4 e6 3. g3 Qh4 4. Nh3 Qf6 5. Qf3 Bc5 6. Kd1 Be3 7. dxe3 Qf3 8. Kd2 Qe2 - Oct 29 06:52 Solved: BLACK_WIN via MATE_PVview
1. c4 Nc6 2. e4 e6 … 6. Kd1 Be3 7. dxe3 Qf3 8. Kd2
1. c4 Nc6 2. e4 e6 3. g3 Qh4 4. Nh3 Qf6 5. Qf3 Bc5 6. Kd1 Be3 7. dxe3 Qf3 8. Kd2 - Oct 29 06:52 Solved: BLACK_WIN via MATE_PVview
1. c4 Nc6 2. e4 e6 … Bc5 6. Kd1 Be3 7. dxe3 Qf3
1. c4 Nc6 2. e4 e6 3. g3 Qh4 4. Nh3 Qf6 5. Qf3 Bc5 6. Kd1 Be3 7. dxe3 Qf3 - Oct 29 06:52 Solved: BLACK_WIN via MATE_PVview
1. c4 Nc6 2. e4 e6 … 5. Qf3 Bc5 6. Kd1 Be3 7. dxe3
1. c4 Nc6 2. e4 e6 3. g3 Qh4 4. Nh3 Qf6 5. Qf3 Bc5 6. Kd1 Be3 7. dxe3