85.3M
positions
16.3M
practically solved
312.37T
engine nodes
2.4M
analyses
0
in queue
6
active workers
36
active cores
15.0M
nodes / sec
19.8
positions / min
147
proof number
4,611
disproof number
Root conquest: 0/20 first moves solved · 19.1% of tree positions solved · last 24h: 100,341 closures, 2.37T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 over 210 open obligations, of which 39 (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 2.4m (median of 10) · measured at 2026-10-16 14:00 UTC
Closures by source, last 24h (100341 of 100341 labelled): USER 68.1% (68357) · FILL 2.0% (1979) · AUTO 29.8% (29949) · SOLVE 0.0% (0) · NONE 0.1% (56) · last 7d (823850 of 823850): USER 90.5% (745490) · FILL 0.7% (5911) · AUTO 8.7% (71959) · SOLVE 0.0% (0) · NONE 0.1% (490). 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. Nc3 e6 … fxe5 7. Qh5 g6 8. Qh4 Bc5 (Auto) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nh3 d5 2. Nc3 h6 … Rac8 16. h3 Bg3 17. Nc7 d3 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nh3 d5 2. Nc3 h6 … Rc8 12. c3 Rc7 13. b5 Nb4 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. Nc3 Nh6 … Bh4 13. a5 e4 14. Kc2 Nf7 (Auto) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. e4 c6 2. Nf3 e5 … 10. Nb5 Nd7 11. f3 Nf5 12. d4 (Auto) · 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 | 1068 | 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 60.0% of the fleet | 1.42T | 15,937 |
| 2 | RickEdinson 18.0% of the fleet | 425.85B | 4,437 |
| 3 | MoNiKaMaDnEsS 14.7% of the fleet | 347.41B | 3,471 |
| 4 | randomchampgamer 7.3% of the fleet | 172.84B | 997 |
4 accounts · 2.37T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 28.9% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 16.7% of the fleet | 52.25T | 371,144 |
| 3 | tenzink 13.7% 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 4.5% of the fleet | 13.97T | 94,348 |
| 8 | JackIV 3.2% of the fleet | 10.06T | 67,859 |
| 9 | MoNiKaMaDnEsS 2.6% of the fleet | 8.23T | 56,617 |
| 10 | gannet 2.3% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 312.42T 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 14:47 VALUE_CASCADEview
1. e4 c6 2. Nf3 e5 … Qd4 14. Qxd4 Kf8 15. Be7 Kf7
1. e4 c6 2. Nf3 e5 3. Nc3 f6 4. Nd5 cxd5 5. Bb5 g6 6. d4 Nc6 7. Be3 Bb4 8. c3 h5 9. Ng5 d6 10. dxe5 fxg5 11. Qd5 Be6 12. Bg5 Qb6 13. O-O-O Qd4 14. Qxd4 Kf8 15. Be7 Kf7 - Oct 16 14:47 VALUE_CASCADEview
1. Nf3 f6 2. e4 e6 … g5 18. d6 Be6 19. d7 Rd8
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 Bd6 6. Nb5 cxb5 7. Ne5 Bxe5 8. Bf4 d6 9. Bb5 Nc6 10. b4 Kf8 11. Bxd6 Qc7 12. Qd2 Rg8 13. d5 Qb6 14. O-O-O e5 15. a4 Qd4 16. Qxd4 Nf5 17. gxf5 g5 18. d6 Be6 19. d7 Rd8 - Oct 16 14:46 Solved: WHITE_WIN via MATE_PVview
1. e4 c6 2. Nf3 e5 … Ne5 20. Nxe5 Kf7 21. Re7 Kg8
1. e4 c6 2. Nf3 e5 3. Nc3 f6 4. Nd5 cxd5 5. Bb5 g6 6. d4 Nc6 7. Be3 Bb4 8. c3 d6 9. dxe5 Nh6 10. Qd5 Be6 11. O-O-O Kf8 12. e5 Ba3 13. bxa3 Qa5 14. a3 fxe5 15. Bg5 Nf7 16. Be7 Kg8 17. Bf6 Kf8 18. Bg7 Ke8 19. Rde1 Ne5 20. Nxe5 Kf7 21. Re7 Kg8 - Oct 16 14:46 Solved: WHITE_WIN via MATE_PVview
1. e4 c6 2. Nf3 e5 … 19. Rde1 Ne5 20. Nxe5 Kf7 21. Re7
1. e4 c6 2. Nf3 e5 3. Nc3 f6 4. Nd5 cxd5 5. Bb5 g6 6. d4 Nc6 7. Be3 Bb4 8. c3 d6 9. dxe5 Nh6 10. Qd5 Be6 11. O-O-O Kf8 12. e5 Ba3 13. bxa3 Qa5 14. a3 fxe5 15. Bg5 Nf7 16. Be7 Kg8 17. Bf6 Kf8 18. Bg7 Ke8 19. Rde1 Ne5 20. Nxe5 Kf7 21. Re7 - Oct 16 14:46 Solved: WHITE_WIN via MATE_PVview
1. e4 c6 2. Nf3 e5 … Ke8 19. Rde1 Ne5 20. Nxe5 Kf7
1. e4 c6 2. Nf3 e5 3. Nc3 f6 4. Nd5 cxd5 5. Bb5 g6 6. d4 Nc6 7. Be3 Bb4 8. c3 d6 9. dxe5 Nh6 10. Qd5 Be6 11. O-O-O Kf8 12. e5 Ba3 13. bxa3 Qa5 14. a3 fxe5 15. Bg5 Nf7 16. Be7 Kg8 17. Bf6 Kf8 18. Bg7 Ke8 19. Rde1 Ne5 20. Nxe5 Kf7 - Oct 16 14:46 Solved: WHITE_WIN via MATE_PVview
1. e4 c6 2. Nf3 e5 … 18. Bg7 Ke8 19. Rde1 Ne5 20. Nxe5
1. e4 c6 2. Nf3 e5 3. Nc3 f6 4. Nd5 cxd5 5. Bb5 g6 6. d4 Nc6 7. Be3 Bb4 8. c3 d6 9. dxe5 Nh6 10. Qd5 Be6 11. O-O-O Kf8 12. e5 Ba3 13. bxa3 Qa5 14. a3 fxe5 15. Bg5 Nf7 16. Be7 Kg8 17. Bf6 Kf8 18. Bg7 Ke8 19. Rde1 Ne5 20. Nxe5 - Oct 16 14:46 Solved: WHITE_WIN via MATE_PVview
1. e4 c6 2. Nf3 e5 … Kf8 18. Bg7 Ke8 19. Rde1 Ne5
1. e4 c6 2. Nf3 e5 3. Nc3 f6 4. Nd5 cxd5 5. Bb5 g6 6. d4 Nc6 7. Be3 Bb4 8. c3 d6 9. dxe5 Nh6 10. Qd5 Be6 11. O-O-O Kf8 12. e5 Ba3 13. bxa3 Qa5 14. a3 fxe5 15. Bg5 Nf7 16. Be7 Kg8 17. Bf6 Kf8 18. Bg7 Ke8 19. Rde1 Ne5 - Oct 16 14:46 Solved: WHITE_WIN via MATE_PVview
1. e4 c6 2. Nf3 e5 … 17. Bf6 Kf8 18. Bg7 Ke8 19. Rde1
1. e4 c6 2. Nf3 e5 3. Nc3 f6 4. Nd5 cxd5 5. Bb5 g6 6. d4 Nc6 7. Be3 Bb4 8. c3 d6 9. dxe5 Nh6 10. Qd5 Be6 11. O-O-O Kf8 12. e5 Ba3 13. bxa3 Qa5 14. a3 fxe5 15. Bg5 Nf7 16. Be7 Kg8 17. Bf6 Kf8 18. Bg7 Ke8 19. Rde1 - Oct 16 14:46 Solved: WHITE_WIN via MATE_PVview
1. e4 c6 2. Nf3 e5 … Kg8 17. Bf6 Kf8 18. Bg7 Ke8
1. e4 c6 2. Nf3 e5 3. Nc3 f6 4. Nd5 cxd5 5. Bb5 g6 6. d4 Nc6 7. Be3 Bb4 8. c3 d6 9. dxe5 Nh6 10. Qd5 Be6 11. O-O-O Kf8 12. e5 Ba3 13. bxa3 Qa5 14. a3 fxe5 15. Bg5 Nf7 16. Be7 Kg8 17. Bf6 Kf8 18. Bg7 Ke8 - Oct 16 14:46 Solved: WHITE_WIN via MATE_PVview
1. e4 c6 2. Nf3 e5 … 16. Be7 Kg8 17. Bf6 Kf8 18. Bg7
1. e4 c6 2. Nf3 e5 3. Nc3 f6 4. Nd5 cxd5 5. Bb5 g6 6. d4 Nc6 7. Be3 Bb4 8. c3 d6 9. dxe5 Nh6 10. Qd5 Be6 11. O-O-O Kf8 12. e5 Ba3 13. bxa3 Qa5 14. a3 fxe5 15. Bg5 Nf7 16. Be7 Kg8 17. Bf6 Kf8 18. Bg7 - Oct 16 14:46 Solved: WHITE_WIN via MATE_PVview
1. e4 c6 2. Nf3 e5 … Nf7 16. Be7 Kg8 17. Bf6 Kf8
1. e4 c6 2. Nf3 e5 3. Nc3 f6 4. Nd5 cxd5 5. Bb5 g6 6. d4 Nc6 7. Be3 Bb4 8. c3 d6 9. dxe5 Nh6 10. Qd5 Be6 11. O-O-O Kf8 12. e5 Ba3 13. bxa3 Qa5 14. a3 fxe5 15. Bg5 Nf7 16. Be7 Kg8 17. Bf6 Kf8 - Oct 16 14:46 Solved: WHITE_WIN via MATE_PVview
1. e4 c6 2. Nf3 e5 … 15. Bg5 Nf7 16. Be7 Kg8 17. Bf6
1. e4 c6 2. Nf3 e5 3. Nc3 f6 4. Nd5 cxd5 5. Bb5 g6 6. d4 Nc6 7. Be3 Bb4 8. c3 d6 9. dxe5 Nh6 10. Qd5 Be6 11. O-O-O Kf8 12. e5 Ba3 13. bxa3 Qa5 14. a3 fxe5 15. Bg5 Nf7 16. Be7 Kg8 17. Bf6