73.4M
positions
13.7M
practically solved
262.32T
engine nodes
2.0M
analyses
6,121
in queue
7
active workers
39
active cores
12.4M
nodes / sec
13.1
positions / min
82
proof number
3,797
disproof number
Root conquest: 0/20 first moves solved · 18.7% of tree positions solved · last 24h: 324,342 closures, 3.91T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 73 over 206 open obligations, of which 37 (18.0%) 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 11.5h (median of 116) · measured at 2026-10-03 03:00 UTC
Closures by source, last 24h (324341 of 324341 labelled): USER 99.7% (323334) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.3% (1007) · last 7d (2678070 of 2678070): USER 98.5% (2638372) · FILL 0.3% (8452) · AUTO 1.0% (26873) · SOLVE 0.0% (0) · NONE 0.2% (4373). 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 … O-O 9. f3 Bb7 10. Nc3 Kg7 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … O-O 9. f3 Bb7 10. Nc3 Kf7 (User) · 128.0M nodes · MoNiKaMaDnEsS-DESKTOP-VG9VPVH-atomicdb
- 1. Nf3 f6 2. e4 e6 … Kf4 26. Bxa6 a5 27. g7 Ke3 (User) · 128.0M nodes · randomchampgamer-2026PC-atomicdb
- 1. Nf3 f6 2. e4 e6 … Kf4 26. Bxa6 a5 27. g7 Rg8 (User) · 128.0M nodes · RickEdinson-MSI-atomicdb
- 1. Nf3 f6 2. e4 e6 … Kf4 26. Bxa6 a5 27. g7 Ne5 (User) · 128.0M nodes · tenzink-compute-vm-4-8-20-ssd-1785501211339-chess-atomicdb#0
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 | 1101 | 2 | |
| g1h3 | unsolved | 725 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 439 | 2 | |
| e2e4 | unsolved | 417 | 2 | |
| b1c3 | unsolved | 110 | 2 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b2b4 | unsolved | 0 | 3 | |
| b1a3 | unsolved | 0 | 3 | |
| h2h3 | unsolved | -97 | 2 | |
| d2d3 | unsolved | -98 | 2 | |
| a2a3 | unsolved | -100 | 2 | |
| f2f3 | unsolved | -117 | 3 | |
| b2b3 | unsolved | -144 | 1 | |
| f2f4 | unsolved | -305 | 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 34.8% of the fleet | 1.36T | 10,316 |
| 2 | auranvesdranor 18.7% of the fleet | 731.92B | 5,609 |
| 3 | tenzink 16.6% of the fleet | 648.48B | 4,837 |
| 4 | randomchampgamer 16.5% of the fleet | 643.68B | 5,158 |
| 5 | RickEdinson 11.4% of the fleet | 446.31B | 3,284 |
| 6 | MoNiKaMaDnEsS 1.7% of the fleet | 66.00B | 518 |
| 7 | quasa 0.2% of the fleet | 7.94B | 62 |
| 8 | soothdest 0.1% of the fleet | 5.48B | 51 |
8 accounts · 3.91T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 34.4% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.1% of the fleet | 39.54T | 327,322 |
| 3 | BManBJ 13.1% of the fleet | 34.25T | 241,264 |
| 4 | auranvesdranor 12.0% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 4.7% of the fleet | 12.36T | 92,099 |
| 6 | JackIV 3.8% of the fleet | 10.06T | 67,859 |
| 7 | RickEdinson 3.1% of the fleet | 8.06T | 54,098 |
| 8 | gannet 2.8% of the fleet | 7.24T | 46,848 |
| 9 | MoNiKaMaDnEsS 2.0% of the fleet | 5.17T | 34,529 |
| 10 | NeoArcturus 1.6% of the fleet | 4.09T | 16,758 |
and 25 more.
35 accounts · 262.37T 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
- Is Nh3 h6 e3 e6 Nc3 a draw?1. Nh3 e6 2. e3 h6 3. Nc3proposed by soothdest · 4 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
Showing the 6 most voted of 21 proposals · see every proposal
Milestones
- Oct 03 03:40 MATE_RECERTIFIEDview
1. Na3 e5 2. Nf3 Qg5 … f5 11. Qd5 Kg6 12. Qf7 Kh7
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 Nh6 6. h3 a6 7. e4 Nf5 8. exf5 Kf7 9. Bb5 h5 10. Qf3 f5 11. Qd5 Kg6 12. Qf7 Kh7 - Oct 03 03:40 MATE_RECERTIFIEDview
1. Nh3 e6 2. Na3 h6 … O-O 10. Qh5 f6 11. Qh8 Kf7
1. Nh3 e6 2. Na3 h6 3. e3 a6 4. Nb5 Ne7 5. Nxc7 Ng6 6. c3 Bd6 7. Ng5 hxg5 8. h4 b5 9. d4 O-O 10. Qh5 f6 11. Qh8 Kf7 - Oct 03 03:40 MATE_RECERTIFIEDview
1. Nf3 d6 2. Ng5 f5 … Kc7 19. Qe5 Kc6 20. Qd6 Kb5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 b5 10. Bc4 d5 11. Bxb5 Rb8 12. f4 Bf8 13. Bh6 Kd7 14. Qe2 Rb6 15. c4 a6 16. c5 e5 17. fxe5 Rb8 18. exd5 Kc7 19. Qe5 Kc6 20. Qd6 Kb5 - Oct 03 03:40 MATE_RECERTIFIEDview
1. Na3 e5 2. Nf3 Qg5 … Rd7 13. Qe6 fxe4 14. Qb6 Rg7
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 a6 6. d4 g6 7. Bh6 Bg7 8. Bxg7 d5 9. e4 O-O-O 10. Qg4 f5 11. Qg5 Kb8 12. Qe7 Rd7 13. Qe6 fxe4 14. Qb6 Rg7 - Oct 03 03:40 MATE_RECERTIFIEDview
1. Nf3 d6 2. Ng5 f5 … Kg7 16. Qd4 Kh6 17. Qg7 Kg5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Rc8 10. Nc3 Kf8 11. Bb5 Bxg5 12. e5 Kg8 13. Bd7 Rc4 14. b3 Rxd4 15. e6 Kg7 16. Qd4 Kh6 17. Qg7 Kg5 - Oct 03 03:40 MATE_RECERTIFIEDview
1. Nf3 f6 2. Nc3 d6 … Ke7 18. dxe5 g5 19. Qd7 Kf8
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 d5 7. e3 Bd6 8. Bc4 Rd8 9. d4 Be7 10. Bb5 Kf8 11. Bd7 e5 12. Bd2 a5 13. c4 b6 14. cxd5 f5 15. Bc3 Rc8 16. Bxc8 Bh4 17. g3 Ke7 18. dxe5 g5 19. Qd7 Kf8 - Oct 03 03:40 MATE_RECERTIFIEDview
1. Nf3 f6 2. Nc3 g6 … Bc5 18. exd5 Ra7 19. Qe7 Kc8
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 a5 8. Bb5 Kd8 9. d4 d5 10. h3 Bc5 11. O-O f5 12. e4 Ba7 13. Kh1 a4 14. Bg5 hxg5 15. Qd2 f4 16. Qb4 f3 17. g3 Bc5 18. exd5 Ra7 19. Qe7 Kc8 - Oct 03 03:40 MATE_RECERTIFIEDview
1. Nh3 d5 2. Nc3 h6 … Kg7 42. h8=Q Kf7 43. Qg7 Ke8
1. Nh3 d5 2. Nc3 h6 3. d4 c6 4. e3 Bg4 5. f3 e6 6. Nb5 cxb5 7. Bb5 Nc6 8. c3 a6 9. g3 e5 10. Ng5 hxg5 11. e4 axb5 12. Qe2 Qa5 13. a4 Qa6 14. Qb5 Qxa4 15. h4 Ra2 16. Rxa2 Ne7 17. O-O g5 18. h5 f5 19. g4 f4 20. c4 Kf7 21. Bd2 Kg8 22. cxd5 Nc6 23. Ra1 Kh7 24. d5 Na5 25. d6 Be7 26. d7 Nb3 27. Bb4 Bd8 28. Ra8 Nd4 29. Be7 Nc6 30. Bxd8 Nd8 31. Rxd8 Rd8 32. h6 b6 33. Kh1 b5 34. Kg2 b4 35. Kf2 b3 36. Kg2 Rh8 37. d8=R Rxd8 38. Kg1 Kg8 39. h7 Kg7 40. Kh1 Kh8 41. Kh2 Kg7 42. h8=Q Kf7 43. Qg7 Ke8 - Oct 03 03:40 MATE_RECERTIFIEDview
1. Nf3 f6 2. Nc3 d6 … e5 16. Qh3 f5 17. Qh7 Kf8
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 d5 7. e3 Bd6 8. Bc4 Bc7 9. Ba6 b5 10. d4 Rd8 11. Bd2 Bxh2 12. Qf3 Kf8 13. Bb4 Kg8 14. Bf8 g6 15. Bxh6 e5 16. Qh3 f5 17. Qh7 Kf8 - Oct 03 03:40 MATE_RECERTIFIEDview
1. Nf3 d6 2. Ng5 f5 … f3 17. Qd5 Kg7 18. Qf7 Kh8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Kf8 10. Bxh6 f4 11. h3 Kg8 12. Bb5 Rf8 13. Be8 Nxe4 14. d5 e5 15. dxe6 Rf6 16. Bxg6 f3 17. Qd5 Kg7 18. Qf7 Kh8 - Oct 03 03:40 MATE_RECERTIFIEDview
1. Nf3 f6 2. Nc3 g6 … e5 14. Qf5 Kc7 15. Qc8 Kb6
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kd8 9. d4 Bb4 10. c3 Be7 11. O-O g5 12. Be8 a5 13. Qd3 e5 14. Qf5 Kc7 15. Qc8 Kb6 - Oct 03 03:40 MATE_RECERTIFIEDview
1. Na3 e5 2. Nf3 Qg5 … 9. axb5 e3 10. fxe3 Ng3 11. c3
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 Nh6 6. h3 b5 7. a4 Nf5 8. d4 e4 9. axb5 e3 10. fxe3 Ng3 11. c3