81.8M
positions
15.7M
practically solved
298.26T
engine nodes
2.3M
analyses
4,270
in queue
14
active workers
66
active cores
11.9M
nodes / sec
30.9
positions / min
85
proof number
4,552
disproof number
Root conquest: 0/20 first moves solved · 19.2% of tree positions solved · last 24h: 86,021 closures, 3.81T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 70 over 218 open obligations, of which 41 (18.8%) 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 1.7m (median of 7) · measured at 2026-10-11 22:00 UTC
Closures by source, last 24h (85990 of 85990 labelled): USER 79.5% (68390) · FILL 0.7% (625) · AUTO 19.7% (16931) · SOLVE 0.0% (0) · NONE 0.1% (44) · last 7d (1597252 of 1597258): USER 98.0% (1564773) · FILL 0.2% (2696) · AUTO 1.8% (28883) · SOLVE 0.0% (0) · NONE 0.1% (900). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nf3 f6 2. Nc3 c6 … 23. Bd3 Kh8 24. f7 Bf8 25. Rc1 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. Ne5 fxe5 … Bh5 10. g4 Be7 11. O-O h6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. Nc3 c6 … Bxe6 24. Rf5 Bg5 25. f7 Rhf8 (User) · 10.00B nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. Nc3 c6 … 23. Bd3 Kh8 24. f7 Bf8 25. Rd1 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … 17. h5 Ne5 18. dxe5 e5 19. O-O (User) · 128.0M nodes · randomchampgamer-2026PC-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 | 1084 | 2 | |
| g1h3 | unsolved | 753 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| e2e4 | unsolved | 400 | 2 | |
| d2d4 | unsolved | 389 | 2 | |
| b1c3 | unsolved | 127 | 2 | |
| b1a3 | unsolved | 0 | 3 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b2b4 | unsolved | -73 | 3 | |
| h2h3 | unsolved | -97 | 2 | |
| d2d3 | unsolved | -98 | 2 | |
| a2a3 | unsolved | -100 | 2 | |
| f2f3 | unsolved | -117 | 3 | |
| b2b3 | unsolved | -144 | 1 | |
| f2f4 | unsolved | -260 | 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 | Torom 41.3% of the fleet | 1.57T | 11,512 |
| 2 | BManBJ 30.4% of the fleet | 1.16T | 9,661 |
| 3 | randomchampgamer 15.2% of the fleet | 578.29B | 3,801 |
| 4 | RickEdinson 10.1% of the fleet | 386.18B | 2,957 |
| 5 | MoNiKaMaDnEsS 3.0% of the fleet | 114.56B | 1,690 |
5 accounts · 3.81T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 30.3% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 15.7% of the fleet | 46.87T | 326,452 |
| 3 | tenzink 14.4% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.5% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 6.1% of the fleet | 18.11T | 130,431 |
| 6 | Torom 4.1% of the fleet | 12.24T | 89,492 |
| 7 | RickEdinson 4.0% of the fleet | 12.03T | 79,601 |
| 8 | JackIV 3.4% of the fleet | 10.06T | 67,859 |
| 9 | gannet 2.4% of the fleet | 7.24T | 46,848 |
| 10 | MoNiKaMaDnEsS 2.3% of the fleet | 6.80T | 46,031 |
and 25 more.
35 accounts · 298.48T 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 · 18 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 · 5 votes
- The weaker of the two f-pawn advances for 1. ...d61. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4proposed by MoNiKaMaDnEsS · 4 votes
- Refuting 1... d61. Nf3 d6 2. Nc3proposed by randomchampgamer · 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 23 proposals · see every proposal
Milestones
- Oct 11 22:51 Solved: BLACK_WIN via MINIMAXview
1. Nf3 f6 2. e4 e6 … 22. Bd3 Kh8 23. f7 Bf8 24. Bg6
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 h5 7. c3 Nh6 8. Ne5 fxe5 9. Bg5 Qf6 10. f4 Ng4 11. f5 Qxg5 12. Qxh5 g5 13. Rf1 e5 14. dxe5 d6 15. O-O-O d5 16. e5 g4 17. Rxd5 Kf7 18. Bc4 Kg7 19. f6 Kh7 20. e6 Bh6 21. Kb1 Rd8 22. Bd3 Kh8 23. f7 Bf8 24. Bg6 - Oct 11 22:51 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 23. f7 Bf8 24. Bg6 Rd2 25. Bc2
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 h5 7. c3 Nh6 8. Ne5 fxe5 9. Bg5 Qf6 10. f4 Ng4 11. f5 Qxg5 12. Qxh5 g5 13. Rf1 e5 14. dxe5 d6 15. O-O-O d5 16. e5 g4 17. Rxd5 Kf7 18. Bc4 Kg7 19. f6 Kh7 20. e6 Bh6 21. Kb1 Rd8 22. Bd3 Kh8 23. f7 Bf8 24. Bg6 Rd2 25. Bc2 - Oct 11 22:51 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Kh8 23. f7 Bf8 24. Bg6 Rd2
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 h5 7. c3 Nh6 8. Ne5 fxe5 9. Bg5 Qf6 10. f4 Ng4 11. f5 Qxg5 12. Qxh5 g5 13. Rf1 e5 14. dxe5 d6 15. O-O-O d5 16. e5 g4 17. Rxd5 Kf7 18. Bc4 Kg7 19. f6 Kh7 20. e6 Bh6 21. Kb1 Rd8 22. Bd3 Kh8 23. f7 Bf8 24. Bg6 Rd2 - Oct 11 22:51 Solved: BLACK_WIN via MINIMAXview
1. Nf3 f6 2. e4 e6 … 22. Bd3 Kh8 23. f7 Bf8 24. Be2
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 h5 7. c3 Nh6 8. Ne5 fxe5 9. Bg5 Qf6 10. f4 Ng4 11. f5 Qxg5 12. Qxh5 g5 13. Rf1 e5 14. dxe5 d6 15. O-O-O d5 16. e5 g4 17. Rxd5 Kf7 18. Bc4 Kg7 19. f6 Kh7 20. e6 Bh6 21. Kb1 Rd8 22. Bd3 Kh8 23. f7 Bf8 24. Be2 - Oct 11 22:51 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 23. f7 Bf8 24. Be2 Rd2 25. Bxg4
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 h5 7. c3 Nh6 8. Ne5 fxe5 9. Bg5 Qf6 10. f4 Ng4 11. f5 Qxg5 12. Qxh5 g5 13. Rf1 e5 14. dxe5 d6 15. O-O-O d5 16. e5 g4 17. Rxd5 Kf7 18. Bc4 Kg7 19. f6 Kh7 20. e6 Bh6 21. Kb1 Rd8 22. Bd3 Kh8 23. f7 Bf8 24. Be2 Rd2 25. Bxg4 - Oct 11 22:51 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Kh8 23. f7 Bf8 24. Be2 Rd2
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 h5 7. c3 Nh6 8. Ne5 fxe5 9. Bg5 Qf6 10. f4 Ng4 11. f5 Qxg5 12. Qxh5 g5 13. Rf1 e5 14. dxe5 d6 15. O-O-O d5 16. e5 g4 17. Rxd5 Kf7 18. Bc4 Kg7 19. f6 Kh7 20. e6 Bh6 21. Kb1 Rd8 22. Bd3 Kh8 23. f7 Bf8 24. Be2 Rd2 - Oct 11 22:51 Solved: BLACK_WIN via MINIMAXview
1. Nf3 f6 2. e4 e6 … 22. Bd3 Kh8 23. f7 Bf8 24. Bf5
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 h5 7. c3 Nh6 8. Ne5 fxe5 9. Bg5 Qf6 10. f4 Ng4 11. f5 Qxg5 12. Qxh5 g5 13. Rf1 e5 14. dxe5 d6 15. O-O-O d5 16. e5 g4 17. Rxd5 Kf7 18. Bc4 Kg7 19. f6 Kh7 20. e6 Bh6 21. Kb1 Rd8 22. Bd3 Kh8 23. f7 Bf8 24. Bf5 - Oct 11 22:51 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 34. Kc2 Rc1 35. Kb2 Rc2 36. Kb1
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 h5 7. c3 Nh6 8. Ne5 fxe5 9. Bg5 Qf6 10. f4 Ng4 11. f5 Qxg5 12. Qxh5 g5 13. Rf1 e5 14. dxe5 d6 15. O-O-O d5 16. e5 g4 17. Rxd5 Kf7 18. Bc4 Kg7 19. f6 Kh7 20. e6 Bh6 21. Kb1 Rd8 22. Bd3 Kh8 23. f7 Bf8 24. Bf5 Rd1 25. Rxd1 Bxe6 26. b4 Rd8 27. c4 Rd1 28. Kc2 Rc1 29. Kd2 Bh6 30. Ke2 Rc2 31. Kd1 Rd2 32. Ke1 Re2 33. Kd1 Re1 34. Kc2 Rc1 35. Kb2 Rc2 36. Kb1 - Oct 11 22:51 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Re1 34. Kc2 Rc1 35. Kb2 Rc2
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 h5 7. c3 Nh6 8. Ne5 fxe5 9. Bg5 Qf6 10. f4 Ng4 11. f5 Qxg5 12. Qxh5 g5 13. Rf1 e5 14. dxe5 d6 15. O-O-O d5 16. e5 g4 17. Rxd5 Kf7 18. Bc4 Kg7 19. f6 Kh7 20. e6 Bh6 21. Kb1 Rd8 22. Bd3 Kh8 23. f7 Bf8 24. Bf5 Rd1 25. Rxd1 Bxe6 26. b4 Rd8 27. c4 Rd1 28. Kc2 Rc1 29. Kd2 Bh6 30. Ke2 Rc2 31. Kd1 Rd2 32. Ke1 Re2 33. Kd1 Re1 34. Kc2 Rc1 35. Kb2 Rc2 - Oct 11 22:51 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 33. Kd1 Re1 34. Kc2 Rc1 35. Kb2
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 h5 7. c3 Nh6 8. Ne5 fxe5 9. Bg5 Qf6 10. f4 Ng4 11. f5 Qxg5 12. Qxh5 g5 13. Rf1 e5 14. dxe5 d6 15. O-O-O d5 16. e5 g4 17. Rxd5 Kf7 18. Bc4 Kg7 19. f6 Kh7 20. e6 Bh6 21. Kb1 Rd8 22. Bd3 Kh8 23. f7 Bf8 24. Bf5 Rd1 25. Rxd1 Bxe6 26. b4 Rd8 27. c4 Rd1 28. Kc2 Rc1 29. Kd2 Bh6 30. Ke2 Rc2 31. Kd1 Rd2 32. Ke1 Re2 33. Kd1 Re1 34. Kc2 Rc1 35. Kb2 - Oct 11 22:51 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Re2 33. Kd1 Re1 34. Kc2 Rc1
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 h5 7. c3 Nh6 8. Ne5 fxe5 9. Bg5 Qf6 10. f4 Ng4 11. f5 Qxg5 12. Qxh5 g5 13. Rf1 e5 14. dxe5 d6 15. O-O-O d5 16. e5 g4 17. Rxd5 Kf7 18. Bc4 Kg7 19. f6 Kh7 20. e6 Bh6 21. Kb1 Rd8 22. Bd3 Kh8 23. f7 Bf8 24. Bf5 Rd1 25. Rxd1 Bxe6 26. b4 Rd8 27. c4 Rd1 28. Kc2 Rc1 29. Kd2 Bh6 30. Ke2 Rc2 31. Kd1 Rd2 32. Ke1 Re2 33. Kd1 Re1 34. Kc2 Rc1 - Oct 11 22:51 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 32. Ke1 Re2 33. Kd1 Re1 34. Kc2
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 h5 7. c3 Nh6 8. Ne5 fxe5 9. Bg5 Qf6 10. f4 Ng4 11. f5 Qxg5 12. Qxh5 g5 13. Rf1 e5 14. dxe5 d6 15. O-O-O d5 16. e5 g4 17. Rxd5 Kf7 18. Bc4 Kg7 19. f6 Kh7 20. e6 Bh6 21. Kb1 Rd8 22. Bd3 Kh8 23. f7 Bf8 24. Bf5 Rd1 25. Rxd1 Bxe6 26. b4 Rd8 27. c4 Rd1 28. Kc2 Rc1 29. Kd2 Bh6 30. Ke2 Rc2 31. Kd1 Rd2 32. Ke1 Re2 33. Kd1 Re1 34. Kc2