70.2M
positions
12.8M
practically solved
252.86T
engine nodes
2.0M
analyses
2,815
in queue
20
active workers
134
active cores
12.4M
nodes / sec
44.7
positions / min
82
proof number
3,797
disproof number
Root conquest: 0/20 first moves solved · 18.2% of tree positions solved · last 24h: 428,206 closures, 7.29T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 81 over 193 open obligations, of which 30 (15.5%) 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 3.1m (median of 30) · measured at 2026-10-01 03:00 UTC
Closures by source, last 24h (428125 of 428125 labelled): USER 100.0% (427982) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.0% (143) · last 7d (2429115 of 2429196): USER 98.2% (2385377) · FILL 0.4% (8795) · AUTO 1.3% (32065) · SOLVE 0.0% (0) · NONE 0.1% (2878). 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 … 9. b4 Bh4 10. g3 Bxg3 11. b5 (User) · 128.0M nodes · auranvesdranor-admin-835912-atomicdb
- 1. Nh3 e6 2. e3 g6 … 9. b4 Bh4 10. g3 Bxg3 11. Bb2 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … a5 13. f3 Kg8 14. Bb5 Kf8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … a5 13. f3 Kg8 14. Bb5 Rb8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … a5 13. f3 Kg8 14. Bb5 b6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
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 | 1015 | 2 | |
| g1h3 | unsolved | 706 | 2 | |
| e2e3 | unsolved | 453 | 3 | |
| d2d4 | unsolved | 437 | 2 | |
| e2e4 | unsolved | 407 | 2 | |
| b1c3 | unsolved | 142 | 2 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b2b4 | unsolved | 0 | 3 | |
| b1a3 | unsolved | 0 | 3 | |
| h2h3 | unsolved | -98 | 2 | |
| a2a3 | unsolved | -103 | 2 | |
| d2d3 | unsolved | -116 | 2 | |
| f2f3 | unsolved | -117 | 3 | |
| b2b3 | unsolved | -169 | 1 | |
| f2f4 | unsolved | -302 | 3 | |
| h2h4 | unsolved | -500 | 2 | |
| a2a4 | unsolved | -510 | 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 | gannet 43.3% of the fleet | 3.15T | 24,102 |
| 2 | BManBJ 20.7% of the fleet | 1.51T | 11,684 |
| 3 | auranvesdranor 14.4% of the fleet | 1.05T | 7,936 |
| 4 | randomchampgamer 8.4% of the fleet | 610.36B | 4,906 |
| 5 | tenzink 8.1% of the fleet | 589.86B | 4,172 |
| 6 | RickEdinson 2.7% of the fleet | 199.74B | 1,329 |
| 7 | MoNiKaMaDnEsS 2.4% of the fleet | 173.16B | 1,375 |
| 8 | soothdest <0.1% of the fleet | 1.47B | 35 |
8 accounts · 7.29T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 35.7% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.1% of the fleet | 38.22T | 317,658 |
| 3 | BManBJ 12.4% of the fleet | 31.43T | 219,433 |
| 4 | auranvesdranor 11.7% of the fleet | 29.62T | 214,418 |
| 5 | randomchampgamer 4.4% of the fleet | 11.10T | 82,121 |
| 6 | JackIV 4.0% of the fleet | 10.06T | 67,859 |
| 7 | RickEdinson 2.8% of the fleet | 7.16T | 47,500 |
| 8 | gannet 2.6% of the fleet | 6.65T | 42,333 |
| 9 | MoNiKaMaDnEsS 1.8% of the fleet | 4.63T | 30,309 |
| 10 | NeoArcturus 1.6% of the fleet | 4.09T | 16,758 |
and 25 more.
35 accounts · 253.03T 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 01 03:38 MATE_RECERTIFIEDview
1. Nh3 d5 2. Nc3 h6 … Kc4 37. Qd3 Kb4 38. Qc4 Ka3
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 g6 17. Bh6 Nxh6 18. h5 exd4 19. h6 Kd7 20. Ke2 d4 21. b4 Bxh6 22. Rxh8 Kc7 23. c4 Kc6 24. e5 Kc7 25. c5 Kc6 26. b5 Kd5 27. e6 Kc4 28. e7 Kd3 29. e8=Q g5 30. Qe3 Kd2 31. Kd3 g4 32. f4 f5 33. b6 Kc3 34. Qd2 Kc2 35. Kc4 Kc3 36. Kd5 Kc4 37. Qd3 Kb4 38. Qc4 Ka3 - Oct 01 03:38 MATE_RECERTIFIEDview
1. Nf3 f6 2. Nc3 d6 … e5 13. Qb4 Kg7 14. Qf8 Kh7
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 d5 7. e3 Bd6 8. Bc4 g6 9. Bxd5 h5 10. Qf3 Kf7 11. d3 Kf8 12. Qf4 e5 13. Qb4 Kg7 14. Qf8 Kh7 - Oct 01 03:38 MATE_RECERTIFIEDview
1. Nf3 d6 2. Ng5 f5 … Be3 16. fxe3 b5 17. Qf7 Kd8
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 a6 10. Bc4 e6 11. Bxe6 Rc7 12. Qe2 Re7 13. Qc4 Re6 14. exf5 Bd2 15. Kf1 Be3 16. fxe3 b5 17. Qf7 Kd8 - Oct 01 03:38 MATE_RECERTIFIEDview
1. Nf3 d6 2. Ng5 f5 … Ne8 13. exf5 Kg7 14. Qe6 Rf8
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 Rh8 12. Qe2 Ne8 13. exf5 Kg7 14. Qe6 Rf8 - Oct 01 03:38 MATE_RECERTIFIEDview
1. Nf3 f6 2. Nc3 g6 … Bb4 15. O-O Bd6 16. Qc6 Ra6
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 a5 10. h3 Kc7 11. Bd2 f5 12. c4 Kb8 13. Bc6 bxc6 14. Qa4 Bb4 15. O-O Bd6 16. Qc6 Ra6 - Oct 01 03:38 MATE_RECERTIFIEDview
1. Nh3 d5 2. Nc3 h6 … 28. Kd2 e1=Q 29. Kc2 Qc1 30. Kb3
1. Nh3 d5 2. Nc3 h6 3. d4 c6 4. e3 Bg4 5. f3 e6 6. Nb5 cxb5 7. Bb5 Nc6 8. g3 a6 9. Ng5 hxg5 10. e4 axb5 11. Qe2 Qb6 12. Qb5 Qxb5 13. a4 Bb4 14. c3 Rxh2 15. a5 Nf6 16. a6 bxa6 17. Ra6 Rxa6 18. f4 Kd8 19. exd5 Nd7 20. f5 e5 21. d5 Bc5 22. d6 e4 23. b4 e3 24. g4 e2 25. Bg5 f6 26. bxc5 Nc5 27. c4 Nd3 28. Kd2 e1=Q 29. Kc2 Qc1 30. Kb3 - Oct 01 03:38 MATE_RECERTIFIEDview
1. Nf3 f6 2. Nc3 d6 … Rxc7 20. Bf8 h5 21. Bg8 h4
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 d5 7. e3 Bd6 8. Bb5 Kf8 9. g3 Rc8 10. c3 Be7 11. O-O a5 12. Kh1 Ba3 13. bxa3 Kg8 14. Qg4 g6 15. Qf4 Rd8 16. Be8 Kh8 17. Qc7 Rd7 18. Ba3 g5 19. Bf7 Rxc7 20. Bf8 h5 21. Bg8 h4 - Oct 01 03:38 MATE_RECERTIFIEDview
1. Nf3 f6 2. Nc3 d6 … g6 15. Qc5 Kg7 16. Qe7 Kg8
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 d5 7. e3 Bd6 8. Bb5 Kf8 9. g3 Rc8 10. c3 f5 11. Be8 Rb8 12. Bg6 Be5 13. Bxf5 d4 14. Qh5 g6 15. Qc5 Kg7 16. Qe7 Kg8 - Oct 01 03:38 MATE_RECERTIFIEDview
1. Nh3 e6 2. e3 g6 … Kc3 41. Qd3 Kb2 42. Qc2 Ka1
1. Nh3 e6 2. e3 g6 3. Bb5 c6 4. Qh5 h6 5. Nc3 Bb4 6. Qe5 Qf6 7. g3 Qf4 8. f3 Qxe5 9. O-O a5 10. Ba6 bxa6 11. Nb5 Kf8 12. c3 Na6 13. Nc7 Rb8 14. Ne8 f6 15. b3 Ba3 16. Bxa3 g5 17. d3 d5 18. Kh1 c5 19. Nd6 Nb4 20. cxb4 Ra8 21. b4 axb4 22. d4 cxd4 23. Rac1 Ne7 24. Rc7 Bd7 25. Rfc1 Ra3 26. Rc8 Bxc8 27. Rc7 Kg8 28. Rd7 Ra8 29. Nf7 Rh7 30. Rd8 Rxd8 31. Nxh6 e5 32. a4 d4 33. exd4 e4 34. a5 Kf7 35. a6 e3 36. Ng1 Ke6 37. a7 e2 38. Nxe2 Kd5 39. a8=Q Kc4 40. Qe4 Kc3 41. Qd3 Kb2 42. Qc2 Ka1 - Oct 01 03:38 MATE_RECERTIFIEDview
1. Nf3 d6 2. Ng5 f5 … Kh7 21. Qe7 Kh6 22. 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 Kf8 10. Bxh6 d5 11. Bb5 f4 12. h3 Kg8 13. Bd7 Kh8 14. Nc3 dxe4 15. Bc8 e6 16. Qe2 a5 17. Qe5 a4 18. Bxb7 a3 19. b4 Kg8 20. Qd6 Kh7 21. Qe7 Kh6 22. Qg7 Kg5 - Oct 01 03:38 MATE_RECERTIFIEDview
1. Nf3 d6 2. Ng5 f5 … Rc5 18. Qh6 Ke8 19. Qf8 Kd7
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 Rc8 12. Nc3 a6 13. e5 Ne8 14. Bd3 f3 15. Bxg6 Nf6 16. Qc1 Ne4 17. gxf3 Rc5 18. Qh6 Ke8 19. Qf8 Kd7 - Oct 01 03:38 MATE_RECERTIFIEDview
1. Nf3 f6 2. Nc3 d6 … g5 15. Qh5 Ba3 16. Qg6 Bxb2
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 d5 7. e3 Bd6 8. Bb5 Kf8 9. g3 Kg8 10. d4 Be7 11. O-O Bf8 12. Kh1 Kh7 13. Bd3 Kh8 14. Qg4 g5 15. Qh5 Ba3 16. Qg6 Bxb2