86.2M
positions
16.4M
practically solved
317.51T
engine nodes
2.4M
analyses
798
in queue
14
active workers
68
active cores
6.7M
nodes / sec
38.9
positions / min
145
proof number
4,661
disproof number
Root conquest: 0/20 first moves solved · 19.0% of tree positions solved · last 24h: 51,500 closures, 4.01T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 70 over 208 open obligations, of which 38 (18.3%) 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 2.4m (median of 41) · measured at 2026-10-18 05:00 UTC
Closures by source, last 24h (51500 of 51500 labelled): USER 92.6% (47698) · FILL 1.0% (522) · AUTO 6.2% (3199) · SOLVE 0.0% (0) · NONE 0.2% (81) · last 7d (658879 of 658879): USER 86.3% (568868) · FILL 1.1% (7395) · AUTO 12.5% (82084) · SOLVE 0.0% (0) · NONE 0.1% (532). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- deep line, ply ≥20 · … Nb1 d5 c3 Nxe4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- deep line, ply ≥20 · … Nb1 d5 c3 dxe4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- deep line, ply ≥20 · … Nb1 d5 c3 b6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- deep line, ply ≥20 · … Nb1 d5 c3 e6 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Be7 11. d4 Bh4 12. g3 Bd8 (User) · 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 | 1071 | 2 | |
| g1h3 | unsolved | 821 | 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 | Torom 46.5% of the fleet | 1.86T | 11,775 |
| 2 | BManBJ 41.0% of the fleet | 1.64T | 7,762 |
| 3 | RickEdinson 12.0% of the fleet | 480.63B | 2,371 |
| 4 | MoNiKaMaDnEsS 0.6% of the fleet | 23.07B | 166 |
| 5 | soothdest <0.1% of the fleet | 256.7M | 3 |
5 accounts · 4.01T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 28.4% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 17.2% of the fleet | 54.66T | 384,113 |
| 3 | tenzink 13.5% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 9.9% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 6.2% of the fleet | 19.85T | 140,897 |
| 6 | Torom 5.5% of the fleet | 17.56T | 125,128 |
| 7 | RickEdinson 4.6% of the fleet | 14.76T | 98,634 |
| 8 | JackIV 3.2% of the fleet | 10.06T | 67,859 |
| 9 | MoNiKaMaDnEsS 2.7% of the fleet | 8.50T | 58,349 |
| 10 | gannet 2.3% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 317.75T 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 18 05:50 Solved: WHITE_WIN via MINIMAXview
deep line, ply ≥20 · … Nb1 d5 c3 Ne8
deep line, ply ≥20 · … Nb1 d5 c3 Ne8 - Oct 18 05:50 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥24 · … Qg4 Kg8 Qe6 Kh8
deep line, ply ≥24 · … Qg4 Kg8 Qe6 Kh8 - Oct 18 05:50 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥23 · … Ne8 Qg4 Kg8 Qe6
deep line, ply ≥23 · … Ne8 Qg4 Kg8 Qe6 - Oct 18 05:50 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥22 · … c3 Ne8 Qg4 Kg8
deep line, ply ≥22 · … c3 Ne8 Qg4 Kg8 - Oct 18 05:50 Solved: WHITE_WIN via MATE_PVview
deep line, ply ≥21 · … d5 c3 Ne8 Qg4
deep line, ply ≥21 · … d5 c3 Ne8 Qg4 - Oct 18 05:50 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … Be7 11. d4 Bh4 12. g3 Bf6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 g6 7. Nc3 e6 8. Nd5 Na6 9. Nc7 Nxc7 10. Nxh8 Be7 11. d4 Bh4 12. g3 Bf6 - Oct 18 05:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Kd8 17. Bxe6 Kc8 18. Qf7 b5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 g6 7. Nc3 e6 8. Nd5 Na6 9. Nc7 Nxc7 10. Nxh8 Be7 11. d4 Bh4 12. g3 Bf6 13. Bg5 d5 14. Qf3 b6 15. Ba6 Kd7 16. Bc8 Kd8 17. Bxe6 Kc8 18. Qf7 b5 - Oct 18 05:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 16. Bc8 Kd8 17. Bxe6 Kc8 18. Qf7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 g6 7. Nc3 e6 8. Nd5 Na6 9. Nc7 Nxc7 10. Nxh8 Be7 11. d4 Bh4 12. g3 Bf6 13. Bg5 d5 14. Qf3 b6 15. Ba6 Kd7 16. Bc8 Kd8 17. Bxe6 Kc8 18. Qf7 - Oct 18 05:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Kd7 16. Bc8 Kd8 17. Bxe6 Kc8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 g6 7. Nc3 e6 8. Nd5 Na6 9. Nc7 Nxc7 10. Nxh8 Be7 11. d4 Bh4 12. g3 Bf6 13. Bg5 d5 14. Qf3 b6 15. Ba6 Kd7 16. Bc8 Kd8 17. Bxe6 Kc8 - Oct 18 05:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 15. Ba6 Kd7 16. Bc8 Kd8 17. Bxe6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 g6 7. Nc3 e6 8. Nd5 Na6 9. Nc7 Nxc7 10. Nxh8 Be7 11. d4 Bh4 12. g3 Bf6 13. Bg5 d5 14. Qf3 b6 15. Ba6 Kd7 16. Bc8 Kd8 17. Bxe6 - Oct 18 05:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … b6 15. Ba6 Kd7 16. Bc8 Kd8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 g6 7. Nc3 e6 8. Nd5 Na6 9. Nc7 Nxc7 10. Nxh8 Be7 11. d4 Bh4 12. g3 Bf6 13. Bg5 d5 14. Qf3 b6 15. Ba6 Kd7 16. Bc8 Kd8 - Oct 18 05:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 14. Qf3 b6 15. Ba6 Kd7 16. Bc8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 g6 7. Nc3 e6 8. Nd5 Na6 9. Nc7 Nxc7 10. Nxh8 Be7 11. d4 Bh4 12. g3 Bf6 13. Bg5 d5 14. Qf3 b6 15. Ba6 Kd7 16. Bc8