80.6M
positions
15.6M
practically solved
292.46T
engine nodes
2.2M
analyses
2,380
in queue
15
active workers
74
active cores
33.3M
nodes / sec
25.4
positions / min
82
proof number
4,106
disproof number
Root conquest: 0/20 first moves solved · 19.3% of tree positions solved · last 24h: 152,753 closures, 4.19T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 70 over 220 open obligations, of which 41 (18.6%) 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 2.1m (median of 5) · measured at 2026-10-10 15:00 UTC
Closures by source, last 24h (152752 of 152752 labelled): USER 100.0% (152714) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.0% (38) · last 7d (1665925 of 1665926): USER 99.0% (1649722) · FILL 0.1% (2071) · AUTO 0.7% (11952) · SOLVE 0.0% (0) · NONE 0.1% (2180). 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 … Nc6 6. O-O Qa5 7. Ng5 Qa6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … Nc6 6. O-O Qa5 7. Ng5 Qb6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. e4 e6 … 17. cxb4 Rc7 18. Ne1 f5 19. Nd3 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. e4 e6 … Nc6 6. O-O Qa5 7. Ng5 Qc7 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 Nh6 … g6 6. Ng5 f5 7. Rg1 a6 (User) · 10.00B 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 | 1021 | 2 | |
| g1h3 | unsolved | 821 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| e2e4 | unsolved | 400 | 2 | |
| d2d4 | unsolved | 387 | 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 | BManBJ 32.1% of the fleet | 1.35T | 6,695 |
| 2 | Torom 32.0% of the fleet | 1.34T | 9,082 |
| 3 | randomchampgamer 16.0% of the fleet | 670.94B | 3,309 |
| 4 | RickEdinson 10.4% of the fleet | 434.14B | 2,110 |
| 5 | MoNiKaMaDnEsS 9.5% of the fleet | 397.25B | 1,936 |
| 6 | soothdest <0.1% of the fleet | 25.3M | 4 |
6 accounts · 4.19T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 30.8% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 15.5% of the fleet | 45.34T | 314,737 |
| 3 | tenzink 14.6% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.7% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 5.9% of the fleet | 17.36T | 125,689 |
| 6 | RickEdinson 3.9% of the fleet | 11.53T | 76,077 |
| 7 | JackIV 3.4% of the fleet | 10.06T | 67,859 |
| 8 | Torom 3.2% of the fleet | 9.42T | 69,414 |
| 9 | gannet 2.5% of the fleet | 7.24T | 46,848 |
| 10 | MoNiKaMaDnEsS 2.3% of the fleet | 6.65T | 44,239 |
and 25 more.
35 accounts · 292.74T 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 23 proposals · see every proposal
Milestones
- Oct 10 15:58 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. e4 e6 … Nc6 6. O-O Qa5 7. Ng5 Qxa2
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O Qa5 7. Ng5 Qxa2 - Oct 10 15:58 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Rd8 18. Qb5 b6 19. Qa6 b5
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O Qa5 7. Ng5 Qxa2 8. Qf3 d6 9. Nxh7 g6 10. Qh3 Bh6 11. d4 Bd7 12. Bxh6 O-O-O 13. Qh7 Kb8 14. Bxc6 Rd7 15. Qg8 Rd8 16. Qf7 Rd7 17. Qe8 Rd8 18. Qb5 b6 19. Qa6 b5 - Oct 10 15:58 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 17. Qe8 Rd8 18. Qb5 b6 19. Qa6
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O Qa5 7. Ng5 Qxa2 8. Qf3 d6 9. Nxh7 g6 10. Qh3 Bh6 11. d4 Bd7 12. Bxh6 O-O-O 13. Qh7 Kb8 14. Bxc6 Rd7 15. Qg8 Rd8 16. Qf7 Rd7 17. Qe8 Rd8 18. Qb5 b6 19. Qa6 - Oct 10 15:58 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Rd7 17. Qe8 Rd8 18. Qb5 b6
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O Qa5 7. Ng5 Qxa2 8. Qf3 d6 9. Nxh7 g6 10. Qh3 Bh6 11. d4 Bd7 12. Bxh6 O-O-O 13. Qh7 Kb8 14. Bxc6 Rd7 15. Qg8 Rd8 16. Qf7 Rd7 17. Qe8 Rd8 18. Qb5 b6 - Oct 10 15:58 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 16. Qf7 Rd7 17. Qe8 Rd8 18. Qb5
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O Qa5 7. Ng5 Qxa2 8. Qf3 d6 9. Nxh7 g6 10. Qh3 Bh6 11. d4 Bd7 12. Bxh6 O-O-O 13. Qh7 Kb8 14. Bxc6 Rd7 15. Qg8 Rd8 16. Qf7 Rd7 17. Qe8 Rd8 18. Qb5 - Oct 10 15:58 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Rd8 16. Qf7 Rd7 17. Qe8 Rd8
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O Qa5 7. Ng5 Qxa2 8. Qf3 d6 9. Nxh7 g6 10. Qh3 Bh6 11. d4 Bd7 12. Bxh6 O-O-O 13. Qh7 Kb8 14. Bxc6 Rd7 15. Qg8 Rd8 16. Qf7 Rd7 17. Qe8 Rd8 - Oct 10 15:58 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 15. Qg8 Rd8 16. Qf7 Rd7 17. Qe8
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O Qa5 7. Ng5 Qxa2 8. Qf3 d6 9. Nxh7 g6 10. Qh3 Bh6 11. d4 Bd7 12. Bxh6 O-O-O 13. Qh7 Kb8 14. Bxc6 Rd7 15. Qg8 Rd8 16. Qf7 Rd7 17. Qe8 - Oct 10 15:58 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Rd7 15. Qg8 Rd8 16. Qf7 Rd7
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O Qa5 7. Ng5 Qxa2 8. Qf3 d6 9. Nxh7 g6 10. Qh3 Bh6 11. d4 Bd7 12. Bxh6 O-O-O 13. Qh7 Kb8 14. Bxc6 Rd7 15. Qg8 Rd8 16. Qf7 Rd7 - Oct 10 15:58 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 14. Bxc6 Rd7 15. Qg8 Rd8 16. Qf7
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O Qa5 7. Ng5 Qxa2 8. Qf3 d6 9. Nxh7 g6 10. Qh3 Bh6 11. d4 Bd7 12. Bxh6 O-O-O 13. Qh7 Kb8 14. Bxc6 Rd7 15. Qg8 Rd8 16. Qf7 - Oct 10 15:58 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Kb8 14. Bxc6 Rd7 15. Qg8 Rd8
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O Qa5 7. Ng5 Qxa2 8. Qf3 d6 9. Nxh7 g6 10. Qh3 Bh6 11. d4 Bd7 12. Bxh6 O-O-O 13. Qh7 Kb8 14. Bxc6 Rd7 15. Qg8 Rd8 - Oct 10 15:58 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 13. Qh7 Kb8 14. Bxc6 Rd7 15. Qg8
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O Qa5 7. Ng5 Qxa2 8. Qf3 d6 9. Nxh7 g6 10. Qh3 Bh6 11. d4 Bd7 12. Bxh6 O-O-O 13. Qh7 Kb8 14. Bxc6 Rd7 15. Qg8 - Oct 10 15:58 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … O-O-O 13. Qh7 Kb8 14. Bxc6 Rd7
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O Qa5 7. Ng5 Qxa2 8. Qf3 d6 9. Nxh7 g6 10. Qh3 Bh6 11. d4 Bd7 12. Bxh6 O-O-O 13. Qh7 Kb8 14. Bxc6 Rd7