85.0M
positions
16.2M
practically solved
311.67T
engine nodes
2.4M
analyses
0
in queue
6
active workers
36
active cores
20.3M
nodes / sec
6.0
positions / min
139
proof number
4,766
disproof number
Root conquest: 0/20 first moves solved · 19.1% of tree positions solved · last 24h: 141,658 closures, 2.60T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 over 211 open obligations, of which 40 (19.0%) 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 59.9m (median of 2) · measured at 2026-10-16 06:00 UTC
Closures by source, last 24h (141658 of 141658 labelled): USER 79.7% (112922) · FILL 1.7% (2420) · AUTO 18.5% (26254) · SOLVE 0.0% (0) · NONE 0.0% (62) · last 7d (869626 of 869626): USER 93.1% (809990) · FILL 0.6% (5356) · AUTO 6.2% (53793) · SOLVE 0.0% (0) · NONE 0.1% (487). 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 … h4 22. f5 Re8 23. e5 Ne4 (Fill) · 2.00B nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … Rfe8 21. Ra6 Bf2 22. Kh1 Bc5 (Fill) · 2.00B nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. Ne5 fxe5 … 12. O-O d5 13. Bd2 Bb4 14. c3 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. Ne5 fxe5 … a6 11. O-O Qb8 12. c4 axb5 (Fill) · 2.00B nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … Rxa1 21. e5 Rc8 22. g3 Bf2 (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 | 1107 | 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 54.1% of the fleet | 1.41T | 13,677 |
| 2 | RickEdinson 16.5% of the fleet | 427.41B | 4,025 |
| 3 | MoNiKaMaDnEsS 15.7% of the fleet | 407.41B | 3,564 |
| 4 | randomchampgamer 13.7% of the fleet | 355.78B | 2,959 |
| 5 | NeoArcturus <0.1% of the fleet | 144.9M | 4 |
5 accounts · 2.60T 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 | 51.80T | 363,651 |
| 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 4.4% of the fleet | 13.84T | 92,412 |
| 8 | JackIV 3.2% of the fleet | 10.06T | 67,859 |
| 9 | MoNiKaMaDnEsS 2.6% of the fleet | 8.15T | 55,191 |
| 10 | gannet 2.3% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 311.76T 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 06:50 VALUE_CASCADEview
1. Nf3 f6 2. Ne5 fxe5 … axb5 12. O-O d5 13. Bd2 Bb4
1. Nf3 f6 2. Ne5 fxe5 3. e4 c6 4. Na3 d6 5. Nb5 cxb5 6. d4 Nc6 7. Bb5 Bg4 8. f3 e6 9. h4 Bh5 10. g4 a6 11. f4 axb5 12. O-O d5 13. Bd2 Bb4 - Oct 16 06:50 VALUE_CASCADEview
1. Nf3 f6 2. e4 e6 … 20. f5 Bc1 21. Bxc1 Rfc8 22. Rxa8
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. O-O axb5 8. h3 h5 9. Qd3 b5 10. Qc3 Qc7 11. Ne5 Ba6 12. Qa5 fxe5 13. Bf4 e5 14. Bg5 Bb4 15. Qb6 Nf6 16. f4 exd4 17. a4 Qa7 18. Qxa6 Bd2 19. axb5 O-O 20. f5 Bc1 21. Bxc1 Rfc8 22. Rxa8 - Oct 16 06:48 VALUE_CASCADEview
1. Nf3 f6 2. e4 e6 … 17. hxg4 g5 18. Rae1 b5 19. a3
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 a6 8. O-O axb5 9. Kh1 Qc7 10. Bf4 Qc4 11. d5 Nh6 12. dxe6 d6 13. Qd4 b6 14. Qc5 Qxc5 15. Nd4 Ng4 16. Bh6 Bxh6 17. hxg4 g5 18. Rae1 b5 19. a3 - Oct 16 06:48 VALUE_CASCADEview
1. Nf3 f6 2. e4 e6 … 18. a4 h5 19. Nf5 Bd7 20. b3
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 a6 8. O-O axb5 9. Kh1 Qc7 10. Bf4 Qc4 11. d5 Nh6 12. dxe6 d6 13. Qd4 b6 14. Qc5 Qxc5 15. Nd4 Ng4 16. Bh6 Bxh6 17. hxg4 g5 18. a4 h5 19. Nf5 Bd7 20. b3 - Oct 16 06:48 VALUE_CASCADEview
1. Nf3 f6 2. e4 e6 … 18. a4 h5 19. Nf5 Be6 20. c3
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 a6 8. O-O axb5 9. Kh1 Qc7 10. Bf4 Qc4 11. d5 Nh6 12. dxe6 d6 13. Qd4 b6 14. Qc5 Qxc5 15. Nd4 Ng4 16. Bh6 Bxh6 17. hxg4 g5 18. a4 h5 19. Nf5 Be6 20. c3 - Oct 16 06:48 VALUE_CASCADEview
1. Nf3 f6 2. e4 e6 … 18. a4 h5 19. Nf5 Be6 20. b3
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 a6 8. O-O axb5 9. Kh1 Qc7 10. Bf4 Qc4 11. d5 Nh6 12. dxe6 d6 13. Qd4 b6 14. Qc5 Qxc5 15. Nd4 Ng4 16. Bh6 Bxh6 17. hxg4 g5 18. a4 h5 19. Nf5 Be6 20. b3 - Oct 16 06:48 VALUE_CASCADEview
1. Nf3 f6 2. e4 e6 … 18. a4 h5 19. Nf5 Bxf5 20. c3
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 a6 8. O-O axb5 9. Kh1 Qc7 10. Bf4 Qc4 11. d5 Nh6 12. dxe6 d6 13. Qd4 b6 14. Qc5 Qxc5 15. Nd4 Ng4 16. Bh6 Bxh6 17. hxg4 g5 18. a4 h5 19. Nf5 Bxf5 20. c3 - Oct 16 06:48 VALUE_CASCADEview
1. Nh3 e6 2. e3 Ba3 … Bg7 7. Ne5 Bxe5 8. Kd1 e5
1. Nh3 e6 2. e3 Ba3 3. Ng1 Bf8 4. Qf3 Qf6 5. Qxf6 g6 6. Nf3 Bg7 7. Ne5 Bxe5 8. Kd1 e5 - Oct 16 06:48 VALUE_CASCADEview
1. e3 e6 2. Qf3 Qf6 … 4. Nf3 Kd8 5. Nh4 b6 6. b3
1. e3 e6 2. Qf3 Qf6 3. Qxf6 g6 4. Nf3 Kd8 5. Nh4 b6 6. b3 - Oct 16 06:48 VALUE_CASCADEview
1. e3 e6 2. Qf3 Qf6 … 4. Nf3 Kd8 5. Nh4 b6 6. a3
1. e3 e6 2. Qf3 Qf6 3. Qxf6 g6 4. Nf3 Kd8 5. Nh4 b6 6. a3 - Oct 16 06:48 VALUE_CASCADEview
1. Nf3 f6 2. e4 e6 … 21. Ra6 Be1 22. g3 Rc4 23. e5
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. O-O axb5 8. h3 h5 9. Qd3 b5 10. Qc3 Qc7 11. Ne5 Ba6 12. Qa5 fxe5 13. Bf4 e5 14. Bg5 Bb4 15. Qb6 Nf6 16. f4 exd4 17. a4 Qa7 18. Qxa6 Bd2 19. axb5 O-O 20. f5 Rfc8 21. Ra6 Be1 22. g3 Rc4 23. e5 - Oct 16 06:47 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 20. f5 Bb4 21. e5 Bc5 22. Rf2
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. O-O axb5 8. h3 h5 9. Qd3 b5 10. Qc3 Qc7 11. Ne5 Ba6 12. Qa5 fxe5 13. Bf4 e5 14. Bg5 Bb4 15. Qb6 Nf6 16. f4 exd4 17. a4 Qa7 18. Qxa6 Bd2 19. axb5 O-O 20. f5 Bb4 21. e5 Bc5 22. Rf2