69.7M
positions
12.7M
practically solved
250.95T
engine nodes
1.9M
analyses
5,926
in queue
18
active workers
128
active cores
19.8M
nodes / sec
40.7
positions / min
82
proof number
3,797
disproof number
Root conquest: 0/20 first moves solved · 18.2% of tree positions solved · last 24h: 456,588 closures, 7.17T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 80 over 198 open obligations, of which 32 (16.2%) 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 1.8m (median of 108) · measured at 2026-09-30 21:00 UTC
Closures by source, last 24h (456356 of 456522 labelled): USER 100.0% (456190) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.0% (166) · last 7d (2324808 of 2324874): USER 98.1% (2281167) · FILL 0.4% (8795) · AUTO 1.4% (32065) · SOLVE 0.0% (0) · NONE 0.1% (2781). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nh3 f6 2. Nc3 h6 … 10. f3 Ne7 11. Ba6 Na4 12. Rb1 (User) · 128.0M nodes · auranvesdranor-admin-835912-atomicdb
- 1. Nh3 f6 2. Nc3 h6 … 10. f3 Ne7 11. Ba6 Na4 12. Bd3 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … f4 11. g4 Rc8 12. Qe2 Rc5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … f4 11. g4 Rc8 12. Qe2 Rc4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … f4 11. g4 Rc8 12. Qe2 Rc6 (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 | 1051 | 2 | |
| g1h3 | unsolved | 747 | 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 42.7% of the fleet | 3.06T | 23,533 |
| 2 | BManBJ 20.9% of the fleet | 1.50T | 11,595 |
| 3 | auranvesdranor 14.7% of the fleet | 1.05T | 7,959 |
| 4 | randomchampgamer 8.7% of the fleet | 621.12B | 5,016 |
| 5 | tenzink 8.0% of the fleet | 576.45B | 4,035 |
| 6 | RickEdinson 2.6% of the fleet | 185.67B | 1,213 |
| 7 | MoNiKaMaDnEsS 2.4% of the fleet | 171.16B | 1,351 |
| 8 | soothdest <0.1% of the fleet | 1.47B | 35 |
8 accounts · 7.17T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 36.0% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.2% of the fleet | 38.05T | 316,310 |
| 3 | BManBJ 12.4% of the fleet | 31.03T | 216,337 |
| 4 | auranvesdranor 11.7% of the fleet | 29.36T | 212,413 |
| 5 | randomchampgamer 4.4% of the fleet | 10.94T | 80,865 |
| 6 | JackIV 4.0% of the fleet | 10.06T | 67,859 |
| 7 | RickEdinson 2.8% of the fleet | 7.05T | 46,627 |
| 8 | gannet 2.3% of the fleet | 5.88T | 36,363 |
| 9 | MoNiKaMaDnEsS 1.8% of the fleet | 4.59T | 29,990 |
| 10 | NeoArcturus 1.6% of the fleet | 4.09T | 16,758 |
and 25 more.
35 accounts · 251.12T 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
- Sep 30 21:37 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … Ne5 26. Rb7 Ka8 27. Rb8 Ka7
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 b6 20. f4 exd4 21. Re1 Kd7 22. exf5 Kc7 23. Re6 Kb8 24. Rd6 Nc6 25. Rd7 Ne5 26. Rb7 Ka8 27. Rb8 Ka7 - Sep 30 21:37 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … 25. Rd7 Ne5 26. Rb7 Ka8 27. Rb8
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 b6 20. f4 exd4 21. Re1 Kd7 22. exf5 Kc7 23. Re6 Kb8 24. Rd6 Nc6 25. Rd7 Ne5 26. Rb7 Ka8 27. Rb8 - Sep 30 21:37 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … Nc6 25. Rd7 Ne5 26. Rb7 Ka8
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 b6 20. f4 exd4 21. Re1 Kd7 22. exf5 Kc7 23. Re6 Kb8 24. Rd6 Nc6 25. Rd7 Ne5 26. Rb7 Ka8 - Sep 30 21:37 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … Kc3 40. h8=Q Kb3 41. Qb2 Ka4
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 b6 20. f4 dxe4 21. fxe5 Kd7 22. Re1 Kc7 23. d5 Nxd5 24. Re8 b5 25. Be3 fxg4 26. b4 Bh6 27. c4 Kb7 28. Rb8 Kc7 29. Rd8 Kb7 30. c5 Rxd8 31. c6 Kc7 32. Bxg5 Kd6 33. c7 Kd5 34. c8=Q Ke4 35. Qh3 Kf4 36. Kh1 Ke5 37. h6 Ke4 38. Qf5 Kd4 39. h7 Kc3 40. h8=Q Kb3 41. Qb2 Ka4 - Sep 30 21:37 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … 39. h7 Kc3 40. h8=Q Kb3 41. Qb2
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 b6 20. f4 dxe4 21. fxe5 Kd7 22. Re1 Kc7 23. d5 Nxd5 24. Re8 b5 25. Be3 fxg4 26. b4 Bh6 27. c4 Kb7 28. Rb8 Kc7 29. Rd8 Kb7 30. c5 Rxd8 31. c6 Kc7 32. Bxg5 Kd6 33. c7 Kd5 34. c8=Q Ke4 35. Qh3 Kf4 36. Kh1 Ke5 37. h6 Ke4 38. Qf5 Kd4 39. h7 Kc3 40. h8=Q Kb3 41. Qb2 - Sep 30 21:37 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … Kd4 39. h7 Kc3 40. h8=Q Kb3
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 b6 20. f4 dxe4 21. fxe5 Kd7 22. Re1 Kc7 23. d5 Nxd5 24. Re8 b5 25. Be3 fxg4 26. b4 Bh6 27. c4 Kb7 28. Rb8 Kc7 29. Rd8 Kb7 30. c5 Rxd8 31. c6 Kc7 32. Bxg5 Kd6 33. c7 Kd5 34. c8=Q Ke4 35. Qh3 Kf4 36. Kh1 Ke5 37. h6 Ke4 38. Qf5 Kd4 39. h7 Kc3 40. h8=Q Kb3 - Sep 30 21:37 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … 38. Qf5 Kd4 39. h7 Kc3 40. h8=Q
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 b6 20. f4 dxe4 21. fxe5 Kd7 22. Re1 Kc7 23. d5 Nxd5 24. Re8 b5 25. Be3 fxg4 26. b4 Bh6 27. c4 Kb7 28. Rb8 Kc7 29. Rd8 Kb7 30. c5 Rxd8 31. c6 Kc7 32. Bxg5 Kd6 33. c7 Kd5 34. c8=Q Ke4 35. Qh3 Kf4 36. Kh1 Ke5 37. h6 Ke4 38. Qf5 Kd4 39. h7 Kc3 40. h8=Q - Sep 30 21:37 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … Ke4 38. Qf5 Kd4 39. h7 Kc3
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 b6 20. f4 dxe4 21. fxe5 Kd7 22. Re1 Kc7 23. d5 Nxd5 24. Re8 b5 25. Be3 fxg4 26. b4 Bh6 27. c4 Kb7 28. Rb8 Kc7 29. Rd8 Kb7 30. c5 Rxd8 31. c6 Kc7 32. Bxg5 Kd6 33. c7 Kd5 34. c8=Q Ke4 35. Qh3 Kf4 36. Kh1 Ke5 37. h6 Ke4 38. Qf5 Kd4 39. h7 Kc3 - Sep 30 21:37 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … 37. h6 Ke4 38. Qf5 Kd4 39. h7
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 b6 20. f4 dxe4 21. fxe5 Kd7 22. Re1 Kc7 23. d5 Nxd5 24. Re8 b5 25. Be3 fxg4 26. b4 Bh6 27. c4 Kb7 28. Rb8 Kc7 29. Rd8 Kb7 30. c5 Rxd8 31. c6 Kc7 32. Bxg5 Kd6 33. c7 Kd5 34. c8=Q Ke4 35. Qh3 Kf4 36. Kh1 Ke5 37. h6 Ke4 38. Qf5 Kd4 39. h7 - Sep 30 21:37 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … Ke5 37. h6 Ke4 38. Qf5 Kd4
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 b6 20. f4 dxe4 21. fxe5 Kd7 22. Re1 Kc7 23. d5 Nxd5 24. Re8 b5 25. Be3 fxg4 26. b4 Bh6 27. c4 Kb7 28. Rb8 Kc7 29. Rd8 Kb7 30. c5 Rxd8 31. c6 Kc7 32. Bxg5 Kd6 33. c7 Kd5 34. c8=Q Ke4 35. Qh3 Kf4 36. Kh1 Ke5 37. h6 Ke4 38. Qf5 Kd4 - Sep 30 21:37 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … 36. Kh1 Ke5 37. h6 Ke4 38. Qf5
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 b6 20. f4 dxe4 21. fxe5 Kd7 22. Re1 Kc7 23. d5 Nxd5 24. Re8 b5 25. Be3 fxg4 26. b4 Bh6 27. c4 Kb7 28. Rb8 Kc7 29. Rd8 Kb7 30. c5 Rxd8 31. c6 Kc7 32. Bxg5 Kd6 33. c7 Kd5 34. c8=Q Ke4 35. Qh3 Kf4 36. Kh1 Ke5 37. h6 Ke4 38. Qf5 - Sep 30 21:37 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … Kf4 36. Kh1 Ke5 37. h6 Ke4
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 b6 20. f4 dxe4 21. fxe5 Kd7 22. Re1 Kc7 23. d5 Nxd5 24. Re8 b5 25. Be3 fxg4 26. b4 Bh6 27. c4 Kb7 28. Rb8 Kc7 29. Rd8 Kb7 30. c5 Rxd8 31. c6 Kc7 32. Bxg5 Kd6 33. c7 Kd5 34. c8=Q Ke4 35. Qh3 Kf4 36. Kh1 Ke5 37. h6 Ke4