59.1M
positions
9.9M
practically solved
212.99T
engine nodes
1.7M
analyses
5,835
in queue
10
active workers
60
active cores
27.0M
nodes / sec
15.4
positions / min
131
proof number
3,777
disproof number
Root conquest: 0/20 first moves solved · 16.7% of tree positions solved · last 24h: 582,174 closures, 6.13T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 79 over 168 open obligations, of which 28 (16.7%) 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 1.6m (median of 111) · measured at 2026-09-20 02:00 UTC
Closures by source, last 24h (582028 of 582028 labelled): USER 99.9% (581561) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.1% (467) · last 7d (2230404 of 2230550): USER 98.7% (2201965) · FILL 0.2% (3608) · AUTO 0.9% (21080) · SOLVE 0.0% (0) · NONE 0.2% (3751). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nh3 e6 2. e3 g6 … Ba6 19. Nc8 f4 20. exf4 Bxd3 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nh3 e6 2. e3 g6 … Ba6 19. Nc8 f4 20. exf4 Bc4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nh3 h6 2. d4 e6 … Nxc2 16. Bxd8 Nc6 17. a3 Rxf4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nh3 h6 2. d4 e6 … Nxc2 16. Bxd8 Nc6 17. a3 Rf5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. e4 c6 … Bh6 8. Ng5 Bxg5 9. f3 Nh6 (User) · 128.0M nodes · BManBJ-Laptop-Blake-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 | 1091 | 2 | |
| g1h3 | unsolved | 717 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 435 | 2 | |
| e2e4 | unsolved | 417 | 2 | |
| b1c3 | unsolved | 72 | 2 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b2b4 | unsolved | 0 | 3 | |
| b1a3 | unsolved | 0 | 3 | |
| h2h3 | unsolved | -100 | 2 | |
| a2a3 | unsolved | -103 | 2 | |
| f2f3 | unsolved | -110 | 2 | |
| d2d3 | unsolved | -116 | 2 | |
| b2b3 | unsolved | -119 | 1 | |
| f2f4 | unsolved | -223 | 3 | |
| h2h4 | unsolved | -500 | 2 | |
| a2a4 | unsolved | -502 | 2 | |
| g2g4 | unsolved | -600 | 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 25.2% of the fleet | 1.54T | 11,324 |
| 2 | auranvesdranor 20.8% of the fleet | 1.28T | 9,763 |
| 3 | JackIV 16.2% of the fleet | 994.21B | 4,978 |
| 4 | Torom 15.6% of the fleet | 953.75B | 6,664 |
| 5 | tenzink 10.0% of the fleet | 615.71B | 4,233 |
| 6 | randomchampgamer 8.4% of the fleet | 515.87B | 4,188 |
| 7 | quasa 2.3% of the fleet | 143.45B | 1,057 |
| 8 | MoNiKaMaDnEsS 1.3% of the fleet | 77.50B | 529 |
| 9 | soothdest 0.2% of the fleet | 10.29B | 79 |
| 10 | NeoArcturus <0.1% of the fleet | 640.0M | 5 |
10 accounts · 6.13T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 37.4% of the fleet | 79.65T | 677,611 |
| 2 | tenzink 16.3% of the fleet | 34.77T | 294,540 |
| 3 | auranvesdranor 11.3% of the fleet | 24.08T | 173,410 |
| 4 | BManBJ 11.1% of the fleet | 23.69T | 161,541 |
| 5 | JackIV 4.4% of the fleet | 9.44T | 64,021 |
| 6 | randomchampgamer 3.7% of the fleet | 7.97T | 57,375 |
| 7 | RickEdinson 3.0% of the fleet | 6.32T | 41,667 |
| 8 | NeoArcturus 1.9% of the fleet | 4.09T | 16,756 |
| 9 | MoNiKaMaDnEsS 1.8% of the fleet | 3.87T | 24,540 |
| 10 | ijh 1.7% of the fleet | 3.57T | 37,348 |
and 22 more.
32 accounts · 213.10T 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 · 16 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
- Refuting 1... d61. Nf3 d6 2. Nc3proposed by randomchampgamer · 3 votes
- The weaker of the two f-pawn advances for 1. ...d61. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4proposed by MoNiKaMaDnEsS · 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
- Is Nh3 h6 e3 e6 Nc3 a draw?1. Nh3 e6 2. e3 h6 3. Nc3proposed by soothdest · 3 votes
Showing the 6 most voted of 19 proposals · see every proposal
Milestones
- Sep 20 02:45 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … Bh6 8. Bg5 O-O 9. f3 Kg7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. d4 Nf6 6. Nxd6 g6 7. exf5 Bh6 8. Bg5 O-O 9. f3 Kg7 - Sep 20 02:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … g4 19. Qe7 Kg6 20. Qf7 Kg5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. d4 Nf6 6. Nxd6 g6 7. exf5 Bh6 8. Bg5 O-O 9. f3 Kg7 10. Bc4 Bxg5 11. Qd2 Rf4 12. g3 Bh3 13. gxf4 g5 14. Bg8 h5 15. Qd3 Bf5 16. Qc4 Be6 17. Bxe6 e6 18. Qc5 g4 19. Qe7 Kg6 20. Qf7 Kg5 - Sep 20 02:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 18. Qc5 g4 19. Qe7 Kg6 20. Qf7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. d4 Nf6 6. Nxd6 g6 7. exf5 Bh6 8. Bg5 O-O 9. f3 Kg7 10. Bc4 Bxg5 11. Qd2 Rf4 12. g3 Bh3 13. gxf4 g5 14. Bg8 h5 15. Qd3 Bf5 16. Qc4 Be6 17. Bxe6 e6 18. Qc5 g4 19. Qe7 Kg6 20. Qf7 - Sep 20 02:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … e6 18. Qc5 g4 19. Qe7 Kg6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. d4 Nf6 6. Nxd6 g6 7. exf5 Bh6 8. Bg5 O-O 9. f3 Kg7 10. Bc4 Bxg5 11. Qd2 Rf4 12. g3 Bh3 13. gxf4 g5 14. Bg8 h5 15. Qd3 Bf5 16. Qc4 Be6 17. Bxe6 e6 18. Qc5 g4 19. Qe7 Kg6 - Sep 20 02:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 17. Bxe6 e6 18. Qc5 g4 19. Qe7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. d4 Nf6 6. Nxd6 g6 7. exf5 Bh6 8. Bg5 O-O 9. f3 Kg7 10. Bc4 Bxg5 11. Qd2 Rf4 12. g3 Bh3 13. gxf4 g5 14. Bg8 h5 15. Qd3 Bf5 16. Qc4 Be6 17. Bxe6 e6 18. Qc5 g4 19. Qe7 - Sep 20 02:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Be6 17. Bxe6 e6 18. Qc5 g4
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. d4 Nf6 6. Nxd6 g6 7. exf5 Bh6 8. Bg5 O-O 9. f3 Kg7 10. Bc4 Bxg5 11. Qd2 Rf4 12. g3 Bh3 13. gxf4 g5 14. Bg8 h5 15. Qd3 Bf5 16. Qc4 Be6 17. Bxe6 e6 18. Qc5 g4 - Sep 20 02:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 16. Qc4 Be6 17. Bxe6 e6 18. Qc5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. d4 Nf6 6. Nxd6 g6 7. exf5 Bh6 8. Bg5 O-O 9. f3 Kg7 10. Bc4 Bxg5 11. Qd2 Rf4 12. g3 Bh3 13. gxf4 g5 14. Bg8 h5 15. Qd3 Bf5 16. Qc4 Be6 17. Bxe6 e6 18. Qc5 - Sep 20 02:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Bf5 16. Qc4 Be6 17. Bxe6 e6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. d4 Nf6 6. Nxd6 g6 7. exf5 Bh6 8. Bg5 O-O 9. f3 Kg7 10. Bc4 Bxg5 11. Qd2 Rf4 12. g3 Bh3 13. gxf4 g5 14. Bg8 h5 15. Qd3 Bf5 16. Qc4 Be6 17. Bxe6 e6 - Sep 20 02:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 15. Qd3 Bf5 16. Qc4 Be6 17. Bxe6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. d4 Nf6 6. Nxd6 g6 7. exf5 Bh6 8. Bg5 O-O 9. f3 Kg7 10. Bc4 Bxg5 11. Qd2 Rf4 12. g3 Bh3 13. gxf4 g5 14. Bg8 h5 15. Qd3 Bf5 16. Qc4 Be6 17. Bxe6 - Sep 20 02:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … h5 15. Qd3 Bf5 16. Qc4 Be6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. d4 Nf6 6. Nxd6 g6 7. exf5 Bh6 8. Bg5 O-O 9. f3 Kg7 10. Bc4 Bxg5 11. Qd2 Rf4 12. g3 Bh3 13. gxf4 g5 14. Bg8 h5 15. Qd3 Bf5 16. Qc4 Be6 - Sep 20 02:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 14. Bg8 h5 15. Qd3 Bf5 16. Qc4
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. d4 Nf6 6. Nxd6 g6 7. exf5 Bh6 8. Bg5 O-O 9. f3 Kg7 10. Bc4 Bxg5 11. Qd2 Rf4 12. g3 Bh3 13. gxf4 g5 14. Bg8 h5 15. Qd3 Bf5 16. Qc4 - Sep 20 02:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … g5 14. Bg8 h5 15. Qd3 Bf5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. d4 Nf6 6. Nxd6 g6 7. exf5 Bh6 8. Bg5 O-O 9. f3 Kg7 10. Bc4 Bxg5 11. Qd2 Rf4 12. g3 Bh3 13. gxf4 g5 14. Bg8 h5 15. Qd3 Bf5