82.6M
positions
15.8M
practically solved
302.26T
engine nodes
2.3M
analyses
431
in queue
6
active workers
34
active cores
0
nodes / sec
11.3
positions / min
85
proof number
4,552
disproof number
Root conquest: 0/20 first moves solved · 19.1% of tree positions solved · last 24h: 85,717 closures, 4.59T 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 2.4h (median of 6) · measured at 2026-10-12 18:00 UTC
Closures by source, last 24h (85672 of 85672 labelled): USER 99.0% (84800) · FILL 0.3% (240) · AUTO 0.7% (598) · SOLVE 0.0% (0) · NONE 0.0% (34) · last 7d (1477256 of 1477301): USER 97.8% (1444400) · FILL 0.2% (2936) · AUTO 2.0% (29481) · SOLVE 0.0% (0) · NONE 0.0% (439). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nf3 d6 2. Ng5 f5 … a6 16. O-O g4 17. gxf4 a5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nh3 d5 2. Nc3 h6 … 14. a4 Nf6 15. b4 Nd7 16. h4 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. Nc3 c6 … Rxb5 16. f5 h5 17. e5 b6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. Nc3 d5 … c6 7. Nxa7 e5 8. Qa5 d4 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … 14. h3 Raf8 15. f3 b4 16. d3 (User) · 128.0M nodes · MoNiKaMaDnEsS-DESKTOP-VG9VPVH-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 | 1107 | 2 | |
| g1h3 | unsolved | 753 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| e2e4 | unsolved | 400 | 2 | |
| d2d4 | unsolved | 393 | 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 54.9% of the fleet | 2.52T | 17,773 |
| 2 | BManBJ 29.1% of the fleet | 1.34T | 8,228 |
| 3 | RickEdinson 9.3% of the fleet | 425.06B | 2,577 |
| 4 | MoNiKaMaDnEsS 3.5% of the fleet | 162.66B | 1,083 |
| 5 | randomchampgamer 3.2% of the fleet | 148.55B | 944 |
5 accounts · 4.59T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 29.9% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 15.9% of the fleet | 47.99T | 333,398 |
| 3 | tenzink 14.2% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.4% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 6.0% of the fleet | 18.16T | 130,741 |
| 6 | Torom 4.8% of the fleet | 14.40T | 104,848 |
| 7 | RickEdinson 4.1% of the fleet | 12.39T | 81,859 |
| 8 | JackIV 3.3% 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 | 6.97T | 47,114 |
and 25 more.
35 accounts · 302.34T 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 12 18:53 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … Kf8 14. O-O Rc8 15. Qe1 Kg8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Nf6 7. Nc3 Na6 8. Nd5 e6 9. f3 Nc7 10. d4 g6 11. Nxc7 Bh6 12. Bxh6 h6 13. Nxh8 Kf8 14. O-O Rc8 15. Qe1 Kg8 - Oct 12 18:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … b5 35. Rf7 Ke8 36. g7 Kd8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Nf6 7. Nc3 Na6 8. Nd5 e6 9. f3 Nc7 10. d4 g6 11. Nxc7 Bh6 12. Bxh6 h6 13. Nxh8 Kf8 14. O-O Rc8 15. Qe1 Kg8 16. Qxe6 Re8 17. Rfe1 Re2 18. Rxe2 a6 19. Bd3 c5 20. d5 c4 21. f4 cxd3 22. Re1 Kf8 23. Re8 Kf7 24. Rd8 Kf6 25. Rf8 Ke7 26. g4 a5 27. Rg8 a4 28. h4 a3 29. Re8 Kf7 30. Rf8 Ke7 31. bxa3 h5 32. g5 b6 33. f5 gxf5 34. g6 b5 35. Rf7 Ke8 36. g7 Kd8 - Oct 12 18:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 34. g6 b5 35. Rf7 Ke8 36. g7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Nf6 7. Nc3 Na6 8. Nd5 e6 9. f3 Nc7 10. d4 g6 11. Nxc7 Bh6 12. Bxh6 h6 13. Nxh8 Kf8 14. O-O Rc8 15. Qe1 Kg8 16. Qxe6 Re8 17. Rfe1 Re2 18. Rxe2 a6 19. Bd3 c5 20. d5 c4 21. f4 cxd3 22. Re1 Kf8 23. Re8 Kf7 24. Rd8 Kf6 25. Rf8 Ke7 26. g4 a5 27. Rg8 a4 28. h4 a3 29. Re8 Kf7 30. Rf8 Ke7 31. bxa3 h5 32. g5 b6 33. f5 gxf5 34. g6 b5 35. Rf7 Ke8 36. g7 - Oct 12 18:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … gxf5 34. g6 b5 35. Rf7 Ke8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Nf6 7. Nc3 Na6 8. Nd5 e6 9. f3 Nc7 10. d4 g6 11. Nxc7 Bh6 12. Bxh6 h6 13. Nxh8 Kf8 14. O-O Rc8 15. Qe1 Kg8 16. Qxe6 Re8 17. Rfe1 Re2 18. Rxe2 a6 19. Bd3 c5 20. d5 c4 21. f4 cxd3 22. Re1 Kf8 23. Re8 Kf7 24. Rd8 Kf6 25. Rf8 Ke7 26. g4 a5 27. Rg8 a4 28. h4 a3 29. Re8 Kf7 30. Rf8 Ke7 31. bxa3 h5 32. g5 b6 33. f5 gxf5 34. g6 b5 35. Rf7 Ke8 - Oct 12 18:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 33. f5 gxf5 34. g6 b5 35. Rf7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Nf6 7. Nc3 Na6 8. Nd5 e6 9. f3 Nc7 10. d4 g6 11. Nxc7 Bh6 12. Bxh6 h6 13. Nxh8 Kf8 14. O-O Rc8 15. Qe1 Kg8 16. Qxe6 Re8 17. Rfe1 Re2 18. Rxe2 a6 19. Bd3 c5 20. d5 c4 21. f4 cxd3 22. Re1 Kf8 23. Re8 Kf7 24. Rd8 Kf6 25. Rf8 Ke7 26. g4 a5 27. Rg8 a4 28. h4 a3 29. Re8 Kf7 30. Rf8 Ke7 31. bxa3 h5 32. g5 b6 33. f5 gxf5 34. g6 b5 35. Rf7 - Oct 12 18:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … b6 33. f5 gxf5 34. g6 b5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Nf6 7. Nc3 Na6 8. Nd5 e6 9. f3 Nc7 10. d4 g6 11. Nxc7 Bh6 12. Bxh6 h6 13. Nxh8 Kf8 14. O-O Rc8 15. Qe1 Kg8 16. Qxe6 Re8 17. Rfe1 Re2 18. Rxe2 a6 19. Bd3 c5 20. d5 c4 21. f4 cxd3 22. Re1 Kf8 23. Re8 Kf7 24. Rd8 Kf6 25. Rf8 Ke7 26. g4 a5 27. Rg8 a4 28. h4 a3 29. Re8 Kf7 30. Rf8 Ke7 31. bxa3 h5 32. g5 b6 33. f5 gxf5 34. g6 b5 - Oct 12 18:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 32. g5 b6 33. f5 gxf5 34. g6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Nf6 7. Nc3 Na6 8. Nd5 e6 9. f3 Nc7 10. d4 g6 11. Nxc7 Bh6 12. Bxh6 h6 13. Nxh8 Kf8 14. O-O Rc8 15. Qe1 Kg8 16. Qxe6 Re8 17. Rfe1 Re2 18. Rxe2 a6 19. Bd3 c5 20. d5 c4 21. f4 cxd3 22. Re1 Kf8 23. Re8 Kf7 24. Rd8 Kf6 25. Rf8 Ke7 26. g4 a5 27. Rg8 a4 28. h4 a3 29. Re8 Kf7 30. Rf8 Ke7 31. bxa3 h5 32. g5 b6 33. f5 gxf5 34. g6 - Oct 12 18:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … h5 32. g5 b6 33. f5 gxf5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Nf6 7. Nc3 Na6 8. Nd5 e6 9. f3 Nc7 10. d4 g6 11. Nxc7 Bh6 12. Bxh6 h6 13. Nxh8 Kf8 14. O-O Rc8 15. Qe1 Kg8 16. Qxe6 Re8 17. Rfe1 Re2 18. Rxe2 a6 19. Bd3 c5 20. d5 c4 21. f4 cxd3 22. Re1 Kf8 23. Re8 Kf7 24. Rd8 Kf6 25. Rf8 Ke7 26. g4 a5 27. Rg8 a4 28. h4 a3 29. Re8 Kf7 30. Rf8 Ke7 31. bxa3 h5 32. g5 b6 33. f5 gxf5 - Oct 12 18:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 31. bxa3 h5 32. g5 b6 33. f5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Nf6 7. Nc3 Na6 8. Nd5 e6 9. f3 Nc7 10. d4 g6 11. Nxc7 Bh6 12. Bxh6 h6 13. Nxh8 Kf8 14. O-O Rc8 15. Qe1 Kg8 16. Qxe6 Re8 17. Rfe1 Re2 18. Rxe2 a6 19. Bd3 c5 20. d5 c4 21. f4 cxd3 22. Re1 Kf8 23. Re8 Kf7 24. Rd8 Kf6 25. Rf8 Ke7 26. g4 a5 27. Rg8 a4 28. h4 a3 29. Re8 Kf7 30. Rf8 Ke7 31. bxa3 h5 32. g5 b6 33. f5 - Oct 12 18:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Ke7 31. bxa3 h5 32. g5 b6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Nf6 7. Nc3 Na6 8. Nd5 e6 9. f3 Nc7 10. d4 g6 11. Nxc7 Bh6 12. Bxh6 h6 13. Nxh8 Kf8 14. O-O Rc8 15. Qe1 Kg8 16. Qxe6 Re8 17. Rfe1 Re2 18. Rxe2 a6 19. Bd3 c5 20. d5 c4 21. f4 cxd3 22. Re1 Kf8 23. Re8 Kf7 24. Rd8 Kf6 25. Rf8 Ke7 26. g4 a5 27. Rg8 a4 28. h4 a3 29. Re8 Kf7 30. Rf8 Ke7 31. bxa3 h5 32. g5 b6 - Oct 12 18:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 30. Rf8 Ke7 31. bxa3 h5 32. g5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Nf6 7. Nc3 Na6 8. Nd5 e6 9. f3 Nc7 10. d4 g6 11. Nxc7 Bh6 12. Bxh6 h6 13. Nxh8 Kf8 14. O-O Rc8 15. Qe1 Kg8 16. Qxe6 Re8 17. Rfe1 Re2 18. Rxe2 a6 19. Bd3 c5 20. d5 c4 21. f4 cxd3 22. Re1 Kf8 23. Re8 Kf7 24. Rd8 Kf6 25. Rf8 Ke7 26. g4 a5 27. Rg8 a4 28. h4 a3 29. Re8 Kf7 30. Rf8 Ke7 31. bxa3 h5 32. g5 - Oct 12 18:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Kf7 30. Rf8 Ke7 31. bxa3 h5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Nf6 7. Nc3 Na6 8. Nd5 e6 9. f3 Nc7 10. d4 g6 11. Nxc7 Bh6 12. Bxh6 h6 13. Nxh8 Kf8 14. O-O Rc8 15. Qe1 Kg8 16. Qxe6 Re8 17. Rfe1 Re2 18. Rxe2 a6 19. Bd3 c5 20. d5 c4 21. f4 cxd3 22. Re1 Kf8 23. Re8 Kf7 24. Rd8 Kf6 25. Rf8 Ke7 26. g4 a5 27. Rg8 a4 28. h4 a3 29. Re8 Kf7 30. Rf8 Ke7 31. bxa3 h5