72.4M
positions
13.4M
practically solved
259.12T
engine nodes
2.0M
analyses
8,634
in queue
11
active workers
72
active cores
7.9M
nodes / sec
24.3
positions / min
82
proof number
3,797
disproof number
Root conquest: 0/20 first moves solved · 18.5% of tree positions solved · last 24h: 482,690 closures, 4.94T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 79 over 203 open obligations, of which 33 (16.3%) 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 2.4m (median of 144) · measured at 2026-10-02 07:00 UTC
Closures by source, last 24h (482561 of 482561 labelled): USER 99.8% (481601) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.2% (960) · last 7d (3003675 of 3003804): USER 98.5% (2958788) · FILL 0.3% (8795) · AUTO 1.1% (32065) · SOLVE 0.0% (0) · NONE 0.1% (4027). 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 … Ba3 21. Bxa3 c5 22. Rfb1 Rh8 (User) · 128.0M nodes · auranvesdranor-admin-835912-atomicdb
- 1. Nh3 e6 2. e3 g6 … Ba3 21. Bxa3 c5 22. Rfb1 Rg8 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Rh8 12. Qe2 Rh7 13. f4 Re8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Rh8 12. Qe2 Rh7 13. f4 Rc7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … Rh8 12. Qe2 Rh7 13. f4 Kf7 (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 | 1101 | 2 | |
| g1h3 | unsolved | 746 | 2 | |
| e2e3 | unsolved | 488 | 3 | |
| d2d4 | unsolved | 439 | 2 | |
| e2e4 | unsolved | 417 | 2 | |
| b1c3 | unsolved | 120 | 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 30.8% of the fleet | 1.52T | 12,050 |
| 2 | auranvesdranor 21.3% of the fleet | 1.05T | 8,030 |
| 3 | tenzink 13.1% of the fleet | 650.17B | 4,723 |
| 4 | randomchampgamer 12.7% of the fleet | 626.14B | 4,894 |
| 5 | RickEdinson 9.1% of the fleet | 447.79B | 3,250 |
| 6 | MoNiKaMaDnEsS 8.8% of the fleet | 433.16B | 3,310 |
| 7 | quasa 2.4% of the fleet | 120.64B | 937 |
| 8 | gannet 1.9% of the fleet | 93.53B | 722 |
8 accounts · 4.94T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 34.8% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.0% of the fleet | 38.99T | 323,284 |
| 3 | BManBJ 12.8% of the fleet | 33.14T | 232,942 |
| 4 | auranvesdranor 11.9% of the fleet | 30.85T | 223,746 |
| 5 | randomchampgamer 4.6% of the fleet | 11.83T | 87,844 |
| 6 | JackIV 3.9% of the fleet | 10.06T | 67,859 |
| 7 | RickEdinson 3.0% of the fleet | 7.69T | 51,374 |
| 8 | gannet 2.8% of the fleet | 7.24T | 46,848 |
| 9 | MoNiKaMaDnEsS 2.0% of the fleet | 5.17T | 34,516 |
| 10 | NeoArcturus 1.6% of the fleet | 4.09T | 16,758 |
and 25 more.
35 accounts · 259.23T 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 02 07:41 LANE_CAP_HIT
- Oct 02 07:40 LANE_CAP_HIT
- Oct 02 07:40 Solved: WHITE_WIN via MINIMAXview
1. Nh3 e6 2. e3 g6 … Ba3 21. Bxa3 c5 22. Rfb1 Rxe4
1. Nh3 e6 2. e3 g6 3. Bb5 h6 4. Nc3 c6 5. Nd5 Qh4 6. g3 exd5 7. Ng5 f5 8. c3 Nf6 9. Ne6 Be7 10. Bc4 d5 11. Ng7 Kf7 12. h3 dxc4 13. d3 Qg4 14. Qf3 Qxf3 15. b4 Ng4 16. Nxf5 a5 17. a4 axb4 18. O-O Re8 19. e4 Nd7 20. f4 Ba3 21. Bxa3 c5 22. Rfb1 Rxe4 - Oct 02 07:40 Solved: WHITE_WIN via MATE_PVview
1. Nc3 h6 2. Nh3 c6 … Kb7 37. a8=Q Kb6 38. Qc6 Ka7
1. Nc3 h6 2. Nh3 c6 3. e3 g6 4. Nd5 e6 5. Bb5 Qh4 6. g3 exd5 7. Ng5 f5 8. c3 Nf6 9. Ne6 Be7 10. Bc4 d5 11. Ng7 Kf7 12. h3 dxc4 13. d3 Qg4 14. Qf3 Qxf3 15. b4 Ng4 16. Nxf5 a5 17. a4 axb4 18. O-O Re8 19. e4 Nd7 20. f4 Ba3 21. Bxa3 c5 22. Rfb1 Rxe4 23. a5 Nb6 24. Re1 Bg4 25. Re7 Kg8 26. Rg7 Kf8 27. Rf7 Ke8 28. Re1 Be2 29. Rxb7 Kd7 30. Rxe2 Kc7 31. a6 Kb8 32. a7 Ka8 33. g4 h5 34. g5 c4 35. dxc4 h4 36. Kg2 Kb7 37. a8=Q Kb6 38. Qc6 Ka7 - Oct 02 07:40 Solved: WHITE_WIN via MATE_PVview
1. Nc3 h6 2. Nh3 c6 … 36. Kg2 Kb7 37. a8=Q Kb6 38. Qc6
1. Nc3 h6 2. Nh3 c6 3. e3 g6 4. Nd5 e6 5. Bb5 Qh4 6. g3 exd5 7. Ng5 f5 8. c3 Nf6 9. Ne6 Be7 10. Bc4 d5 11. Ng7 Kf7 12. h3 dxc4 13. d3 Qg4 14. Qf3 Qxf3 15. b4 Ng4 16. Nxf5 a5 17. a4 axb4 18. O-O Re8 19. e4 Nd7 20. f4 Ba3 21. Bxa3 c5 22. Rfb1 Rxe4 23. a5 Nb6 24. Re1 Bg4 25. Re7 Kg8 26. Rg7 Kf8 27. Rf7 Ke8 28. Re1 Be2 29. Rxb7 Kd7 30. Rxe2 Kc7 31. a6 Kb8 32. a7 Ka8 33. g4 h5 34. g5 c4 35. dxc4 h4 36. Kg2 Kb7 37. a8=Q Kb6 38. Qc6 - Oct 02 07:40 Solved: WHITE_WIN via MATE_PVview
1. Nc3 h6 2. Nh3 c6 … h4 36. Kg2 Kb7 37. a8=Q Kb6
1. Nc3 h6 2. Nh3 c6 3. e3 g6 4. Nd5 e6 5. Bb5 Qh4 6. g3 exd5 7. Ng5 f5 8. c3 Nf6 9. Ne6 Be7 10. Bc4 d5 11. Ng7 Kf7 12. h3 dxc4 13. d3 Qg4 14. Qf3 Qxf3 15. b4 Ng4 16. Nxf5 a5 17. a4 axb4 18. O-O Re8 19. e4 Nd7 20. f4 Ba3 21. Bxa3 c5 22. Rfb1 Rxe4 23. a5 Nb6 24. Re1 Bg4 25. Re7 Kg8 26. Rg7 Kf8 27. Rf7 Ke8 28. Re1 Be2 29. Rxb7 Kd7 30. Rxe2 Kc7 31. a6 Kb8 32. a7 Ka8 33. g4 h5 34. g5 c4 35. dxc4 h4 36. Kg2 Kb7 37. a8=Q Kb6 - Oct 02 07:40 Solved: WHITE_WIN via MATE_PVview
1. Nc3 h6 2. Nh3 c6 … 35. dxc4 h4 36. Kg2 Kb7 37. a8=Q
1. Nc3 h6 2. Nh3 c6 3. e3 g6 4. Nd5 e6 5. Bb5 Qh4 6. g3 exd5 7. Ng5 f5 8. c3 Nf6 9. Ne6 Be7 10. Bc4 d5 11. Ng7 Kf7 12. h3 dxc4 13. d3 Qg4 14. Qf3 Qxf3 15. b4 Ng4 16. Nxf5 a5 17. a4 axb4 18. O-O Re8 19. e4 Nd7 20. f4 Ba3 21. Bxa3 c5 22. Rfb1 Rxe4 23. a5 Nb6 24. Re1 Bg4 25. Re7 Kg8 26. Rg7 Kf8 27. Rf7 Ke8 28. Re1 Be2 29. Rxb7 Kd7 30. Rxe2 Kc7 31. a6 Kb8 32. a7 Ka8 33. g4 h5 34. g5 c4 35. dxc4 h4 36. Kg2 Kb7 37. a8=Q - Oct 02 07:40 Solved: WHITE_WIN via MATE_PVview
1. Nc3 h6 2. Nh3 c6 … c4 35. dxc4 h4 36. Kg2 Kb7
1. Nc3 h6 2. Nh3 c6 3. e3 g6 4. Nd5 e6 5. Bb5 Qh4 6. g3 exd5 7. Ng5 f5 8. c3 Nf6 9. Ne6 Be7 10. Bc4 d5 11. Ng7 Kf7 12. h3 dxc4 13. d3 Qg4 14. Qf3 Qxf3 15. b4 Ng4 16. Nxf5 a5 17. a4 axb4 18. O-O Re8 19. e4 Nd7 20. f4 Ba3 21. Bxa3 c5 22. Rfb1 Rxe4 23. a5 Nb6 24. Re1 Bg4 25. Re7 Kg8 26. Rg7 Kf8 27. Rf7 Ke8 28. Re1 Be2 29. Rxb7 Kd7 30. Rxe2 Kc7 31. a6 Kb8 32. a7 Ka8 33. g4 h5 34. g5 c4 35. dxc4 h4 36. Kg2 Kb7 - Oct 02 07:40 Solved: WHITE_WIN via MATE_PVview
1. Nc3 h6 2. Nh3 c6 … 34. g5 c4 35. dxc4 h4 36. Kg2
1. Nc3 h6 2. Nh3 c6 3. e3 g6 4. Nd5 e6 5. Bb5 Qh4 6. g3 exd5 7. Ng5 f5 8. c3 Nf6 9. Ne6 Be7 10. Bc4 d5 11. Ng7 Kf7 12. h3 dxc4 13. d3 Qg4 14. Qf3 Qxf3 15. b4 Ng4 16. Nxf5 a5 17. a4 axb4 18. O-O Re8 19. e4 Nd7 20. f4 Ba3 21. Bxa3 c5 22. Rfb1 Rxe4 23. a5 Nb6 24. Re1 Bg4 25. Re7 Kg8 26. Rg7 Kf8 27. Rf7 Ke8 28. Re1 Be2 29. Rxb7 Kd7 30. Rxe2 Kc7 31. a6 Kb8 32. a7 Ka8 33. g4 h5 34. g5 c4 35. dxc4 h4 36. Kg2 - Oct 02 07:40 Solved: WHITE_WIN via MATE_PVview
1. Nc3 h6 2. Nh3 c6 … h5 34. g5 c4 35. dxc4 h4
1. Nc3 h6 2. Nh3 c6 3. e3 g6 4. Nd5 e6 5. Bb5 Qh4 6. g3 exd5 7. Ng5 f5 8. c3 Nf6 9. Ne6 Be7 10. Bc4 d5 11. Ng7 Kf7 12. h3 dxc4 13. d3 Qg4 14. Qf3 Qxf3 15. b4 Ng4 16. Nxf5 a5 17. a4 axb4 18. O-O Re8 19. e4 Nd7 20. f4 Ba3 21. Bxa3 c5 22. Rfb1 Rxe4 23. a5 Nb6 24. Re1 Bg4 25. Re7 Kg8 26. Rg7 Kf8 27. Rf7 Ke8 28. Re1 Be2 29. Rxb7 Kd7 30. Rxe2 Kc7 31. a6 Kb8 32. a7 Ka8 33. g4 h5 34. g5 c4 35. dxc4 h4 - Oct 02 07:40 Solved: WHITE_WIN via MATE_PVview
1. Nc3 h6 2. Nh3 c6 … 33. g4 h5 34. g5 c4 35. dxc4
1. Nc3 h6 2. Nh3 c6 3. e3 g6 4. Nd5 e6 5. Bb5 Qh4 6. g3 exd5 7. Ng5 f5 8. c3 Nf6 9. Ne6 Be7 10. Bc4 d5 11. Ng7 Kf7 12. h3 dxc4 13. d3 Qg4 14. Qf3 Qxf3 15. b4 Ng4 16. Nxf5 a5 17. a4 axb4 18. O-O Re8 19. e4 Nd7 20. f4 Ba3 21. Bxa3 c5 22. Rfb1 Rxe4 23. a5 Nb6 24. Re1 Bg4 25. Re7 Kg8 26. Rg7 Kf8 27. Rf7 Ke8 28. Re1 Be2 29. Rxb7 Kd7 30. Rxe2 Kc7 31. a6 Kb8 32. a7 Ka8 33. g4 h5 34. g5 c4 35. dxc4 - Oct 02 07:40 Solved: WHITE_WIN via MATE_PVview
1. Nc3 h6 2. Nh3 c6 … Ka8 33. g4 h5 34. g5 c4
1. Nc3 h6 2. Nh3 c6 3. e3 g6 4. Nd5 e6 5. Bb5 Qh4 6. g3 exd5 7. Ng5 f5 8. c3 Nf6 9. Ne6 Be7 10. Bc4 d5 11. Ng7 Kf7 12. h3 dxc4 13. d3 Qg4 14. Qf3 Qxf3 15. b4 Ng4 16. Nxf5 a5 17. a4 axb4 18. O-O Re8 19. e4 Nd7 20. f4 Ba3 21. Bxa3 c5 22. Rfb1 Rxe4 23. a5 Nb6 24. Re1 Bg4 25. Re7 Kg8 26. Rg7 Kf8 27. Rf7 Ke8 28. Re1 Be2 29. Rxb7 Kd7 30. Rxe2 Kc7 31. a6 Kb8 32. a7 Ka8 33. g4 h5 34. g5 c4