79.6M
positions
15.3M
practically solved
287.25T
engine nodes
2.2M
analyses
6,165
in queue
6
active workers
34
active cores
26.3M
nodes / sec
10.3
positions / min
82
proof number
4,106
disproof number
Root conquest: 0/20 first moves solved · 19.2% of tree positions solved · last 24h: 187,015 closures, 3.33T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 70 over 219 open obligations, of which 40 (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 6.4h (median of 125) · measured at 2026-10-09 11:00 UTC
Closures by source, last 24h (187014 of 187014 labelled): USER 100.0% (186952) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.0% (62) · last 7d (1674994 of 1674995): USER 99.0% (1657681) · FILL 0.1% (2071) · AUTO 0.7% (11952) · SOLVE 0.0% (0) · NONE 0.2% (3290). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nf3 d6 2. Ng5 f5 … 13. a4 b4 14. O-O b3 15. c3 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … 20. f5 Rfc8 21. e5 Rc4 22. g3 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. Nc3 c6 … 18. Ke2 O-O-O 19. d5 Rf7 20. Rab1 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. Nc3 c6 … 18. Ke2 O-O-O 19. d5 Rf7 20. Rad1 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 c6 … 18. Ke2 O-O-O 19. d5 Rf7 20. Rac1 (User) · 128.0M nodes · randomchampgamer-2026PC-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 | 1077 | 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 | BManBJ 45.3% of the fleet | 1.51T | 9,925 |
| 2 | randomchampgamer 19.8% of the fleet | 656.85B | 4,515 |
| 3 | Torom 18.6% of the fleet | 618.21B | 4,535 |
| 4 | RickEdinson 13.3% of the fleet | 442.01B | 2,702 |
| 5 | MoNiKaMaDnEsS 3.0% of the fleet | 100.14B | 729 |
| 6 | soothdest 0.1% of the fleet | 2.73B | 31 |
6 accounts · 3.33T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 31.4% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 15.2% of the fleet | 43.75T | 306,418 |
| 3 | tenzink 14.9% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.9% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 5.8% of the fleet | 16.58T | 121,596 |
| 6 | RickEdinson 3.8% of the fleet | 11.02T | 73,489 |
| 7 | JackIV 3.5% of the fleet | 10.06T | 67,859 |
| 8 | Torom 2.6% of the fleet | 7.37T | 55,749 |
| 9 | gannet 2.5% of the fleet | 7.24T | 46,848 |
| 10 | MoNiKaMaDnEsS 2.2% of the fleet | 6.20T | 42,008 |
and 25 more.
35 accounts · 287.34T 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 09 11:55 Solved: BLACK_WIN via MINIMAXview
1. Nf3 f6 2. e4 e6 … 17. Ke2 Rh7 18. d5 Rf7 19. Bd3
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 h5 7. c3 Nh6 8. Ne5 fxe5 9. Bg5 Qf6 10. f4 Ng4 11. f5 Qxg5 12. Qxh5 g5 13. h3 b6 14. g4 e5 15. h4 Ba6 16. a4 O-O-O 17. Ke2 Rh7 18. d5 Rf7 19. Bd3 - Oct 09 11:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Ne5 fxe5 … Qxc7 12. Bc4 O-O-O 13. Be6 a6
1. Nf3 f6 2. Ne5 fxe5 3. Nc3 c6 4. d4 e6 5. Bg5 Nf6 6. d5 e5 7. d6 Na6 8. e4 Nb4 9. Nb5 Nxc2 10. O-O-O b6 11. Nc7 Qxc7 12. Bc4 O-O-O 13. Be6 a6 - Oct 09 11:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Ne5 fxe5 … Qxc7 12. Bc4 O-O-O 13. Be6 c5
1. Nf3 f6 2. Ne5 fxe5 3. Nc3 c6 4. d4 e6 5. Bg5 Nf6 6. d5 e5 7. d6 Na6 8. e4 Nb4 9. Nb5 Nxc2 10. O-O-O b6 11. Nc7 Qxc7 12. Bc4 O-O-O 13. Be6 c5 - Oct 09 11:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Ne5 fxe5 … Qxc7 12. Bc4 O-O-O 13. Be6 b5
1. Nf3 f6 2. Ne5 fxe5 3. Nc3 c6 4. d4 e6 5. Bg5 Nf6 6. d5 e5 7. d6 Na6 8. e4 Nb4 9. Nb5 Nxc2 10. O-O-O b6 11. Nc7 Qxc7 12. Bc4 O-O-O 13. Be6 b5 - Oct 09 11:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Ne5 fxe5 … h6 13. Bf7 Kd8 14. Be8 hxg5
1. Nf3 f6 2. Ne5 fxe5 3. Nc3 c6 4. d4 e6 5. Bg5 Nf6 6. d5 e5 7. d6 Na6 8. e4 Nb4 9. Nb5 Nxc2 10. O-O-O b6 11. Nc7 Qxc7 12. Bc4 h6 13. Bf7 Kd8 14. Be8 hxg5 - Oct 09 11:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Ne5 fxe5 … 12. Bc4 h6 13. Bf7 Kd8 14. Be8
1. Nf3 f6 2. Ne5 fxe5 3. Nc3 c6 4. d4 e6 5. Bg5 Nf6 6. d5 e5 7. d6 Na6 8. e4 Nb4 9. Nb5 Nxc2 10. O-O-O b6 11. Nc7 Qxc7 12. Bc4 h6 13. Bf7 Kd8 14. Be8 - Oct 09 11:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Ne5 fxe5 … Qxc7 12. Bc4 h6 13. Bf7 Kd8
1. Nf3 f6 2. Ne5 fxe5 3. Nc3 c6 4. d4 e6 5. Bg5 Nf6 6. d5 e5 7. d6 Na6 8. e4 Nb4 9. Nb5 Nxc2 10. O-O-O b6 11. Nc7 Qxc7 12. Bc4 h6 13. Bf7 Kd8 - Oct 09 11:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Ne5 fxe5 … 11. Nc7 Qxc7 12. Bc4 h6 13. Bf7
1. Nf3 f6 2. Ne5 fxe5 3. Nc3 c6 4. d4 e6 5. Bg5 Nf6 6. d5 e5 7. d6 Na6 8. e4 Nb4 9. Nb5 Nxc2 10. O-O-O b6 11. Nc7 Qxc7 12. Bc4 h6 13. Bf7 - Oct 09 11:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Ne5 fxe5 … b6 11. Nc7 Qxc7 12. Bc4 h6
1. Nf3 f6 2. Ne5 fxe5 3. Nc3 c6 4. d4 e6 5. Bg5 Nf6 6. d5 e5 7. d6 Na6 8. e4 Nb4 9. Nb5 Nxc2 10. O-O-O b6 11. Nc7 Qxc7 12. Bc4 h6 - Oct 09 11:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Ne5 fxe5 … g6 13. Bf7 Kd8 14. Be6 Bxd6
1. Nf3 f6 2. Ne5 fxe5 3. Nc3 c6 4. d4 e6 5. Bg5 Nf6 6. d5 e5 7. d6 Na6 8. e4 Nb4 9. Nb5 Nxc2 10. O-O-O b6 11. Nc7 Qxc7 12. Bc4 g6 13. Bf7 Kd8 14. Be6 Bxd6 - Oct 09 11:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Ne5 fxe5 … 12. Bc4 g6 13. Bf7 Kd8 14. Be6
1. Nf3 f6 2. Ne5 fxe5 3. Nc3 c6 4. d4 e6 5. Bg5 Nf6 6. d5 e5 7. d6 Na6 8. e4 Nb4 9. Nb5 Nxc2 10. O-O-O b6 11. Nc7 Qxc7 12. Bc4 g6 13. Bf7 Kd8 14. Be6 - Oct 09 11:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Ne5 fxe5 … Qxc7 12. Bc4 g6 13. Bf7 Kd8
1. Nf3 f6 2. Ne5 fxe5 3. Nc3 c6 4. d4 e6 5. Bg5 Nf6 6. d5 e5 7. d6 Na6 8. e4 Nb4 9. Nb5 Nxc2 10. O-O-O b6 11. Nc7 Qxc7 12. Bc4 g6 13. Bf7 Kd8