80.4M
positions
15.5M
practically solved
290.96T
engine nodes
2.2M
analyses
3,289
in queue
7
active workers
42
active cores
8.0M
nodes / sec
12.2
positions / min
82
proof number
4,106
disproof number
Root conquest: 0/20 first moves solved · 19.3% of tree positions solved · last 24h: 262,176 closures, 4.49T 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 23.1m (median of 23) · measured at 2026-10-10 04:00 UTC
Closures by source, last 24h (262176 of 262176 labelled): USER 100.0% (262132) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.0% (44) · last 7d (1666433 of 1666433): USER 99.0% (1649760) · FILL 0.1% (2071) · AUTO 0.7% (11952) · SOLVE 0.0% (0) · NONE 0.2% (2650). 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 … 25. c4 Qa5 26. Qxa5 Ba4 27. g4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … Kh7 26. b4 Bb8 27. a4 a6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. e4 e6 … Ra5 20. Rxa5 g6 21. Bh6 h4 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 d6 2. Ng5 f5 … Bd7 11. Ne6 Na6 12. a3 Bxg5 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … Kh7 26. b4 Bb8 27. a4 b5 (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 | 1094 | 2 | |
| g1h3 | unsolved | 820 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| e2e4 | unsolved | 400 | 2 | |
| d2d4 | unsolved | 379 | 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 42.0% of the fleet | 1.89T | 12,733 |
| 2 | BManBJ 30.5% of the fleet | 1.37T | 8,485 |
| 3 | randomchampgamer 15.0% of the fleet | 672.32B | 4,533 |
| 4 | RickEdinson 9.8% of the fleet | 442.53B | 2,651 |
| 5 | MoNiKaMaDnEsS 2.7% of the fleet | 121.32B | 722 |
| 6 | soothdest <0.1% of the fleet | 8.0M | 17 |
6 accounts · 4.49T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 31.0% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 15.3% of the fleet | 44.63T | 311,644 |
| 3 | tenzink 14.7% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.8% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 5.9% of the fleet | 17.04T | 124,603 |
| 6 | RickEdinson 3.9% of the fleet | 11.32T | 75,285 |
| 7 | JackIV 3.5% of the fleet | 10.06T | 67,859 |
| 8 | Torom 3.2% of the fleet | 9.26T | 68,482 |
| 9 | gannet 2.5% of the fleet | 7.24T | 46,848 |
| 10 | MoNiKaMaDnEsS 2.2% of the fleet | 6.32T | 42,730 |
and 25 more.
35 accounts · 291.00T 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 22 proposals · see every proposal
Milestones
- Oct 10 04:20 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Bg7 11. Qe2 O-O-O 12. Qe6 Kb8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 g6 6. d4 h5 7. Bxc6 Bd7 8. Nxh8 Na6 9. exf5 Bc6 10. Nc3 Bg7 11. Qe2 O-O-O 12. Qe6 Kb8 - Oct 10 04:20 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 10. Nc3 Bg7 11. Qe2 O-O-O 12. Qe6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 g6 6. d4 h5 7. Bxc6 Bd7 8. Nxh8 Na6 9. exf5 Bc6 10. Nc3 Bg7 11. Qe2 O-O-O 12. Qe6 - Oct 10 04:20 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Bc6 10. Nc3 Bg7 11. Qe2 O-O-O
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 g6 6. d4 h5 7. Bxc6 Bd7 8. Nxh8 Na6 9. exf5 Bc6 10. Nc3 Bg7 11. Qe2 O-O-O - Oct 10 04:20 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Be5 13. Qb5 Kf7 14. Qe8 Ke6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 g6 6. d4 h5 7. Bxc6 Bd7 8. Nxh8 Na6 9. exf5 Bc6 10. Nc3 Bg7 11. Qe2 Be4 12. Nxe4 Be5 13. Qb5 Kf7 14. Qe8 Ke6 - Oct 10 04:20 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 12. Nxe4 Be5 13. Qb5 Kf7 14. Qe8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 g6 6. d4 h5 7. Bxc6 Bd7 8. Nxh8 Na6 9. exf5 Bc6 10. Nc3 Bg7 11. Qe2 Be4 12. Nxe4 Be5 13. Qb5 Kf7 14. Qe8 - Oct 10 04:20 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Be4 12. Nxe4 Be5 13. Qb5 Kf7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 g6 6. d4 h5 7. Bxc6 Bd7 8. Nxh8 Na6 9. exf5 Bc6 10. Nc3 Bg7 11. Qe2 Be4 12. Nxe4 Be5 13. Qb5 Kf7 - Oct 10 04:20 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 11. Qe2 Be4 12. Nxe4 Be5 13. Qb5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 g6 6. d4 h5 7. Bxc6 Bd7 8. Nxh8 Na6 9. exf5 Bc6 10. Nc3 Bg7 11. Qe2 Be4 12. Nxe4 Be5 13. Qb5 - Oct 10 04:20 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Bg7 11. Qe2 Be4 12. Nxe4 Be5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 g6 6. d4 h5 7. Bxc6 Bd7 8. Nxh8 Na6 9. exf5 Bc6 10. Nc3 Bg7 11. Qe2 Be4 12. Nxe4 Be5 - Oct 10 04:20 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 10. Nc3 Bg7 11. Qe2 Be4 12. Nxe4
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 g6 6. d4 h5 7. Bxc6 Bd7 8. Nxh8 Na6 9. exf5 Bc6 10. Nc3 Bg7 11. Qe2 Be4 12. Nxe4 - Oct 10 04:20 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Bc6 10. Nc3 Bg7 11. Qe2 Be4
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 g6 6. d4 h5 7. Bxc6 Bd7 8. Nxh8 Na6 9. exf5 Bc6 10. Nc3 Bg7 11. Qe2 Be4 - Oct 10 04:20 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Kb4 27. a3 Ka4 28. b3 Ka5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 g6 6. d4 h5 7. Bxc6 Bd7 8. Nxh8 Na6 9. exf5 Bc6 10. Nc3 Bg7 11. Qe2 e5 12. dxe5 Be5 13. f4 O-O-O 14. fxe5 Re8 15. Qe6 Rxe6 16. Nd5 Be8 17. Ne7 Kd8 18. Bg5 Bc6 19. Nd5 Kc8 20. O-O Be8 21. Ne7 Kd7 22. Rf8 Kc7 23. Nc8 d5 24. Bf4 Kc6 25. Rf6 Kc5 26. Rc6 Kb4 27. a3 Ka4 28. b3 Ka5 - Oct 10 04:20 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 26. Rc6 Kb4 27. a3 Ka4 28. b3
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 g6 6. d4 h5 7. Bxc6 Bd7 8. Nxh8 Na6 9. exf5 Bc6 10. Nc3 Bg7 11. Qe2 e5 12. dxe5 Be5 13. f4 O-O-O 14. fxe5 Re8 15. Qe6 Rxe6 16. Nd5 Be8 17. Ne7 Kd8 18. Bg5 Bc6 19. Nd5 Kc8 20. O-O Be8 21. Ne7 Kd7 22. Rf8 Kc7 23. Nc8 d5 24. Bf4 Kc6 25. Rf6 Kc5 26. Rc6 Kb4 27. a3 Ka4 28. b3