84.9M
positions
16.2M
practically solved
311.35T
engine nodes
2.4M
analyses
0
in queue
6
active workers
36
active cores
9.0M
nodes / sec
9.4
positions / min
141
proof number
4,639
disproof number
Root conquest: 0/20 first moves solved · 19.1% of tree positions solved · last 24h: 144,195 closures, 2.63T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 over 212 open obligations, of which 40 (18.9%) 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 9.0h (median of 1) · measured at 2026-10-16 03:00 UTC
Closures by source, last 24h (144195 of 144195 labelled): USER 81.7% (117840) · FILL 1.6% (2266) · AUTO 16.7% (24023) · SOLVE 0.0% (0) · NONE 0.0% (66) · last 7d (874255 of 874255): USER 93.5% (817425) · FILL 0.6% (4981) · AUTO 5.9% (51369) · SOLVE 0.0% (0) · NONE 0.1% (480). 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 e6 … 8. h3 d6 9. Kh1 b6 10. e5 (Auto) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … Bb7 14. Ng5 Qb8 15. f4 Nxg4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. e4 e6 … 13. d4 Bb7 14. Ne5 fxe5 15. f4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. e4 e6 … 13. d4 Bb7 14. Ne1 O-O 15. Bxc6 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. Ne5 fxe5 … Qxb5 16. c4 e6 17. c5 Ra4 (Fill) · 2.00B 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 | 1103 | 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 53.5% of the fleet | 1.41T | 13,194 |
| 2 | randomchampgamer 16.8% of the fleet | 443.64B | 3,439 |
| 3 | RickEdinson 16.4% of the fleet | 431.45B | 3,849 |
| 4 | MoNiKaMaDnEsS 13.3% of the fleet | 349.78B | 3,055 |
| 5 | NeoArcturus <0.1% of the fleet | 144.9M | 4 |
5 accounts · 2.63T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 29.0% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 16.6% of the fleet | 51.60T | 361,902 |
| 3 | tenzink 13.8% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.1% 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 4.4% of the fleet | 13.78T | 91,896 |
| 8 | JackIV 3.2% of the fleet | 10.06T | 67,859 |
| 9 | MoNiKaMaDnEsS 2.6% of the fleet | 8.06T | 54,505 |
| 10 | gannet 2.3% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 311.41T 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 03:40 MATE_RECERTIFIEDview
1. Nf3 d6 2. Ng5 f5 … Bf2 19. Kd1 cxb5 20. Qe6 Kd8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 g6 7. Nc3 Bf5 8. d3 d5 9. Ne4 Bh6 10. Ned6 exd6 11. Nd6 Kf8 12. Bg5 a5 13. f4 Nf6 14. Bxf6 Nd7 15. Qe2 Ne5 16. fxe5 Be3 17. Rf1 Ke7 18. Qg4 Bf2 19. Kd1 cxb5 20. Qe6 Kd8 - Oct 16 03:40 MATE_RECERTIFIEDview
1. e3 e6 2. Qf3 Qf6 3. h4 Nh6 4. Bb5 Ke7 5. b3 Qxf3
1. e3 e6 2. Qf3 Qf6 3. h4 Nh6 4. Bb5 Ke7 5. b3 Qxf3 - Oct 16 03:40 MATE_RECERTIFIEDview
1. Nf3 d6 2. Ng5 f5 … Rbe8 17. Nf7 Kg8 18. Qh6 e5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Nf6 7. Nc3 Na6 8. Nd5 e6 9. f3 Nc7 10. d4 g6 11. Nxc7 Bh6 12. Bxh6 cxb5 13. Qd2 Rb8 14. Qa5 O-O 15. Nh6 Kh8 16. Qg5 Rbe8 17. Nf7 Kg8 18. Qh6 e5 - Oct 16 03:40 MATE_RECERTIFIEDview
deep line, ply ≥52 · … g3 Kg8 Qh7 Kf8
deep line, ply ≥52 · … g3 Kg8 Qh7 Kf8 - Oct 16 03:40 MATE_RECERTIFIEDview
1. Nf3 d6 2. Ng5 f5 … Kc8 19. Nb6 Kb8 20. Nd8 e5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. Nd8 Na6 8. Qh5 g6 9. Qg5 Nf6 10. Ne6 Bh6 11. Qxg6 Nc7 12. Bxc6 Kd7 13. g3 Raf8 14. f3 a6 15. Nc3 Rf5 16. O-O Rxf3 17. Rf8 Rxf8 18. Nd5 Kc8 19. Nb6 Kb8 20. Nd8 e5 - Oct 16 03:40 MATE_RECERTIFIEDview
1. Nh3 e6 2. e3 c6 … 5. Qxc5 Bb4 6. Be2 Qh4 7. g3
1. Nh3 e6 2. e3 c6 3. Ng1 g6 4. Qh5 c5 5. Qxc5 Bb4 6. Be2 Qh4 7. g3 - Oct 16 03:40 MATE_RECERTIFIEDview
1. Nf3 d6 2. Ng5 f5 … Rf8 17. Rxf8 g5 18. Qe8 Kc7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 Be4 9. f3 g6 10. Bh6 Bxh6 11. O-O Na6 12. Qe1 e6 13. fxe4 b6 14. Bc4 Nd5 15. Nxd6 Kd8 16. Bxe6 Rf8 17. Rxf8 g5 18. Qe8 Kc7 - Oct 16 03:40 MATE_RECERTIFIEDview
1. Nf3 d6 2. Ng5 f5 … Bh3 9. Nd5 e5 10. Nc7 Kd7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Nf6 7. Nc3 Bg4 8. f3 Bh3 9. Nd5 e5 10. Nc7 Kd7 - Oct 16 03:40 MATE_RECERTIFIEDview
1. Nh3 e6 2. e3 c6 … 5. Qxc5 Qh4 6. e4 Bb4 7. Nc3
1. Nh3 e6 2. e3 c6 3. Ng1 g6 4. Qh5 c5 5. Qxc5 Qh4 6. e4 Bb4 7. Nc3 - Oct 16 03:40 MATE_RECERTIFIEDview
1. e3 e6 2. Qh5 g6 … Qh4 5. g3 Nf6 6. Ne5 Nxh5
1. e3 e6 2. Qh5 g6 3. Nc3 Bb4 4. Nf3 Qh4 5. g3 Nf6 6. Ne5 Nxh5 - Oct 16 03:40 MATE_RECERTIFIEDview
1. Nf3 d6 2. Ng5 f5 … Kg8 20. Bf7 Kh8 21. Bg7 Kh7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 e5 7. d4 e4 8. Nd8 h5 9. Bg5 g6 10. Nxb7 Nf6 11. Ba6 d5 12. Nc3 Bb4 13. Bc8 Ng4 14. f4 Ba5 15. Be7 Rh6 16. Qxg4 Bb4 17. Bd7 Kf7 18. Bf8 Bxc3 19. Be8 Kg8 20. Bf7 Kh8 21. Bg7 Kh7 - Oct 16 03:40 MATE_RECERTIFIEDview
1. g3 e6 2. e3 Qh4 … 4. Bb5 Nc6 5. Bc4 Qg2 6. Nb5
1. g3 e6 2. e3 Qh4 3. Nc3 Qh3 4. Bb5 Nc6 5. Bc4 Qg2 6. Nb5