80.2M
positions
15.5M
practically solved
290.09T
engine nodes
2.2M
analyses
5,005
in queue
14
active workers
66
active cores
27.1M
nodes / sec
33.8
positions / min
82
proof number
4,106
disproof number
Root conquest: 0/20 first moves solved · 19.3% of tree positions solved · last 24h: 324,234 closures, 4.50T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 over 219 open obligations, of which 41 (18.7%) 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 43.8m (median of 145) · measured at 2026-10-09 21:00 UTC
Closures by source, last 24h (324234 of 324234 labelled): USER 100.0% (324175) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.0% (59) · last 7d (1730579 of 1730579): USER 99.0% (1713649) · FILL 0.1% (2071) · AUTO 0.7% (11952) · SOLVE 0.0% (0) · NONE 0.2% (2907). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nf3 e5 2. e4 Be7 … 7. exf5 Kf8 8. Qxd7 Na6 9. Bd3 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 e5 2. e4 Be7 … 7. exf5 Kf8 8. Qxd7 Na6 9. Rf1 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. e4 e6 … Re8 26. g4 g5 27. Kg2 h4 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. e4 e6 … Kg8 24. g4 Rb8 25. c4 Rc8 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … 12. Kh1 b6 13. c4 a6 14. a4 (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 | 1095 | 2 | |
| g1h3 | unsolved | 806 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| e2e4 | unsolved | 400 | 2 | |
| d2d4 | unsolved | 379 | 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 39.6% of the fleet | 1.78T | 12,041 |
| 2 | BManBJ 33.6% of the fleet | 1.51T | 9,847 |
| 3 | randomchampgamer 14.6% of the fleet | 658.85B | 4,958 |
| 4 | RickEdinson 9.7% of the fleet | 437.12B | 2,808 |
| 5 | MoNiKaMaDnEsS 2.4% of the fleet | 107.50B | 662 |
| 6 | soothdest <0.1% of the fleet | 8.0M | 17 |
6 accounts · 4.50T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 31.1% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 15.3% of the fleet | 44.36T | 310,164 |
| 3 | tenzink 14.8% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.8% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 5.8% of the fleet | 16.85T | 123,634 |
| 6 | RickEdinson 3.9% of the fleet | 11.20T | 74,664 |
| 7 | JackIV 3.5% of the fleet | 10.06T | 67,859 |
| 8 | Torom 3.2% of the fleet | 9.16T | 67,789 |
| 9 | gannet 2.5% of the fleet | 7.24T | 46,848 |
| 10 | MoNiKaMaDnEsS 2.2% of the fleet | 6.31T | 42,670 |
and 25 more.
35 accounts · 290.30T 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 · 17 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 22 proposals · see every proposal
Milestones
- Oct 09 21:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Be3 33. g5 Ke7 34. Rh8 Bxg5
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 Bd2 22. f7 Bxe6 23. Bb5 Bc1 24. Rf5 Rhf8 25. b3 Bg5 26. Bd7 Kg7 27. c4 Rad8 28. c5 Bf4 29. Rh5 Kf6 30. b4 Bc1 31. h4 gxh3 32. g4 Be3 33. g5 Ke7 34. Rh8 Bxg5 - Oct 09 21:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 32. g4 Be3 33. g5 Ke7 34. Rh8
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 Bd2 22. f7 Bxe6 23. Bb5 Bc1 24. Rf5 Rhf8 25. b3 Bg5 26. Bd7 Kg7 27. c4 Rad8 28. c5 Bf4 29. Rh5 Kf6 30. b4 Bc1 31. h4 gxh3 32. g4 Be3 33. g5 Ke7 34. Rh8 - Oct 09 21:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … gxh3 32. g4 Be3 33. g5 Ke7
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 Bd2 22. f7 Bxe6 23. Bb5 Bc1 24. Rf5 Rhf8 25. b3 Bg5 26. Bd7 Kg7 27. c4 Rad8 28. c5 Bf4 29. Rh5 Kf6 30. b4 Bc1 31. h4 gxh3 32. g4 Be3 33. g5 Ke7 - Oct 09 21:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Be3 33. g5 Kg7 34. Rh7 Kg6
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 Bd2 22. f7 Bxe6 23. Bb5 Bc1 24. Rf5 Rhf8 25. b3 Bg5 26. Bd7 Kg7 27. c4 Rad8 28. c5 Bf4 29. Rh5 Kf6 30. b4 Bc1 31. h4 gxh3 32. g4 Be3 33. g5 Kg7 34. Rh7 Kg6 - Oct 09 21:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 32. g4 Be3 33. g5 Kg7 34. Rh7
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 Bd2 22. f7 Bxe6 23. Bb5 Bc1 24. Rf5 Rhf8 25. b3 Bg5 26. Bd7 Kg7 27. c4 Rad8 28. c5 Bf4 29. Rh5 Kf6 30. b4 Bc1 31. h4 gxh3 32. g4 Be3 33. g5 Kg7 34. Rh7 - Oct 09 21:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … gxh3 32. g4 Be3 33. g5 Kg7
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 Bd2 22. f7 Bxe6 23. Bb5 Bc1 24. Rf5 Rhf8 25. b3 Bg5 26. Bd7 Kg7 27. c4 Rad8 28. c5 Bf4 29. Rh5 Kf6 30. b4 Bc1 31. h4 gxh3 32. g4 Be3 33. g5 Kg7 - Oct 09 21:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Be3 33. g5 Kg6 34. Bf5 Kg7
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 Bd2 22. f7 Bxe6 23. Bb5 Bc1 24. Rf5 Rhf8 25. b3 Bg5 26. Bd7 Kg7 27. c4 Rad8 28. c5 Bf4 29. Rh5 Kf6 30. b4 Bc1 31. h4 gxh3 32. g4 Be3 33. g5 Kg6 34. Bf5 Kg7 - Oct 09 21:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 32. g4 Be3 33. g5 Kg6 34. 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 Bd2 22. f7 Bxe6 23. Bb5 Bc1 24. Rf5 Rhf8 25. b3 Bg5 26. Bd7 Kg7 27. c4 Rad8 28. c5 Bf4 29. Rh5 Kf6 30. b4 Bc1 31. h4 gxh3 32. g4 Be3 33. g5 Kg6 34. Bf5 - Oct 09 21:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … gxh3 32. g4 Be3 33. g5 Kg6
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 Bd2 22. f7 Bxe6 23. Bb5 Bc1 24. Rf5 Rhf8 25. b3 Bg5 26. Bd7 Kg7 27. c4 Rad8 28. c5 Bf4 29. Rh5 Kf6 30. b4 Bc1 31. h4 gxh3 32. g4 Be3 33. g5 Kg6 - Oct 09 21:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Ke5 34. g6 Ke4 35. Re5 Kd3
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 Bd2 22. f7 Bxe6 23. Bb5 Bc1 24. Rf5 Rhf8 25. b3 Bg5 26. Bd7 Kg7 27. c4 Rad8 28. c5 Bf4 29. Rh5 Kf6 30. b4 Bc1 31. h4 gxh3 32. g4 Be3 33. g5 Ke5 34. g6 Ke4 35. Re5 Kd3 - Oct 09 21:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 33. g5 Ke5 34. g6 Ke4 35. Re5
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 Bd2 22. f7 Bxe6 23. Bb5 Bc1 24. Rf5 Rhf8 25. b3 Bg5 26. Bd7 Kg7 27. c4 Rad8 28. c5 Bf4 29. Rh5 Kf6 30. b4 Bc1 31. h4 gxh3 32. g4 Be3 33. g5 Ke5 34. g6 Ke4 35. Re5 - Oct 09 21:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Be3 33. g5 Ke5 34. g6 Ke4
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 Bd2 22. f7 Bxe6 23. Bb5 Bc1 24. Rf5 Rhf8 25. b3 Bg5 26. Bd7 Kg7 27. c4 Rad8 28. c5 Bf4 29. Rh5 Kf6 30. b4 Bc1 31. h4 gxh3 32. g4 Be3 33. g5 Ke5 34. g6 Ke4