83.2M
positions
15.9M
practically solved
305.13T
engine nodes
2.3M
analyses
4
in queue
14
active workers
74
active cores
14.3M
nodes / sec
32.4
positions / min
85
proof number
4,551
disproof number
Root conquest: 0/20 first moves solved · 19.1% of tree positions solved · last 24h: 113,341 closures, 3.63T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 70 over 216 open obligations, of which 41 (19.0%) 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 2.2m (median of 4) · measured at 2026-10-13 12:00 UTC
Closures by source, last 24h (113341 of 113341 labelled): USER 99.5% (112777) · FILL 0.4% (487) · AUTO 0.0% (16) · SOLVE 0.0% (0) · NONE 0.1% (61) · last 7d (1358869 of 1358869): USER 97.6% (1325836) · FILL 0.2% (3129) · AUTO 2.2% (29497) · SOLVE 0.0% (0) · NONE 0.0% (407). 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. e4 e6 … 22. c4 Kh8 23. h3 h4 24. c5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … 23. h3 a5 24. Be4 d4 25. g4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. e4 e6 … Kh8 23. h3 h4 24. Rd2 g5 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … b6 28. g3 Bd2 29. Rd5 Bf4 (Fill) · 2.00B nodes · MoNiKaMaDnEsS-DESKTOP-VG9VPVH-atomicdb
- 1. Nf3 f6 2. e4 e6 … g6 7. h3 d6 8. Kh1 Bh6 (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 | 1121 | 2 | |
| g1h3 | unsolved | 753 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| e2e4 | unsolved | 400 | 2 | |
| d2d4 | unsolved | 395 | 2 | |
| b1c3 | unsolved | 127 | 2 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b1a3 | unsolved | 0 | 3 | |
| 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 | BManBJ 37.8% of the fleet | 1.37T | 8,446 |
| 2 | Torom 35.1% of the fleet | 1.27T | 8,388 |
| 3 | RickEdinson 11.9% of the fleet | 432.47B | 2,691 |
| 4 | MoNiKaMaDnEsS 9.9% of the fleet | 358.21B | 2,305 |
| 5 | randomchampgamer 5.4% of the fleet | 194.76B | 1,141 |
5 accounts · 3.63T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 29.6% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 16.0% of the fleet | 49.00T | 339,770 |
| 3 | tenzink 14.0% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.3% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 6.0% of the fleet | 18.35T | 131,882 |
| 6 | Torom 5.1% of the fleet | 15.68T | 113,236 |
| 7 | RickEdinson 4.2% of the fleet | 12.71T | 83,943 |
| 8 | JackIV 3.3% of the fleet | 10.06T | 67,859 |
| 9 | gannet 2.4% of the fleet | 7.24T | 46,848 |
| 10 | MoNiKaMaDnEsS 2.4% of the fleet | 7.21T | 48,723 |
and 25 more.
35 accounts · 305.39T 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 13 12:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Bxc2 26. Rh7 Kg8 27. Rh8 Kf7
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. Ng5 a6 8. O-O fxg5 9. Bg5 h5 10. Bc4 Qc7 11. e5 Bg7 12. Qf3 Bxe5 13. Qxc6 Nf6 14. Bxf6 d5 15. f4 O-O 16. f5 e5 17. dxe5 Re8 18. Rfe1 Re2 19. Rxe2 gxf5 20. Re1 Bd7 21. Bd3 Rf8 22. Re8 Kh8 23. Bf5 Bc6 24. g3 Ba4 25. Re7 Bxc2 26. Rh7 Kg8 27. Rh8 Kf7 - Oct 13 12:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 25. Re7 Bxc2 26. Rh7 Kg8 27. Rh8
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. Ng5 a6 8. O-O fxg5 9. Bg5 h5 10. Bc4 Qc7 11. e5 Bg7 12. Qf3 Bxe5 13. Qxc6 Nf6 14. Bxf6 d5 15. f4 O-O 16. f5 e5 17. dxe5 Re8 18. Rfe1 Re2 19. Rxe2 gxf5 20. Re1 Bd7 21. Bd3 Rf8 22. Re8 Kh8 23. Bf5 Bc6 24. g3 Ba4 25. Re7 Bxc2 26. Rh7 Kg8 27. Rh8 - Oct 13 12:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Ba4 25. Re7 Bxc2 26. Rh7 Kg8
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. Ng5 a6 8. O-O fxg5 9. Bg5 h5 10. Bc4 Qc7 11. e5 Bg7 12. Qf3 Bxe5 13. Qxc6 Nf6 14. Bxf6 d5 15. f4 O-O 16. f5 e5 17. dxe5 Re8 18. Rfe1 Re2 19. Rxe2 gxf5 20. Re1 Bd7 21. Bd3 Rf8 22. Re8 Kh8 23. Bf5 Bc6 24. g3 Ba4 25. Re7 Bxc2 26. Rh7 Kg8 - Oct 13 12:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 24. g3 Ba4 25. Re7 Bxc2 26. Rh7
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. Ng5 a6 8. O-O fxg5 9. Bg5 h5 10. Bc4 Qc7 11. e5 Bg7 12. Qf3 Bxe5 13. Qxc6 Nf6 14. Bxf6 d5 15. f4 O-O 16. f5 e5 17. dxe5 Re8 18. Rfe1 Re2 19. Rxe2 gxf5 20. Re1 Bd7 21. Bd3 Rf8 22. Re8 Kh8 23. Bf5 Bc6 24. g3 Ba4 25. Re7 Bxc2 26. Rh7 - Oct 13 12:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Bc6 24. g3 Ba4 25. Re7 Bxc2
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. Ng5 a6 8. O-O fxg5 9. Bg5 h5 10. Bc4 Qc7 11. e5 Bg7 12. Qf3 Bxe5 13. Qxc6 Nf6 14. Bxf6 d5 15. f4 O-O 16. f5 e5 17. dxe5 Re8 18. Rfe1 Re2 19. Rxe2 gxf5 20. Re1 Bd7 21. Bd3 Rf8 22. Re8 Kh8 23. Bf5 Bc6 24. g3 Ba4 25. Re7 Bxc2 - Oct 13 12:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Kg8 27. Rg7 Kf8 28. Rg8 Ke7
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. Ng5 a6 8. O-O fxg5 9. Bg5 h5 10. Bc4 Qc7 11. e5 Bg7 12. Qf3 Bxe5 13. Qxc6 Nf6 14. Bxf6 d5 15. f4 O-O 16. f5 e5 17. dxe5 Re8 18. Rfe1 Re2 19. Rxe2 gxf5 20. Re1 Bd7 21. Bd3 Rf8 22. Re8 Kh8 23. Bf5 Bc6 24. g3 Ba4 25. Re7 Re8 26. Rh7 Kg8 27. Rg7 Kf8 28. Rg8 Ke7 - Oct 13 12:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 26. Rh7 Kg8 27. Rg7 Kf8 28. Rg8
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. Ng5 a6 8. O-O fxg5 9. Bg5 h5 10. Bc4 Qc7 11. e5 Bg7 12. Qf3 Bxe5 13. Qxc6 Nf6 14. Bxf6 d5 15. f4 O-O 16. f5 e5 17. dxe5 Re8 18. Rfe1 Re2 19. Rxe2 gxf5 20. Re1 Bd7 21. Bd3 Rf8 22. Re8 Kh8 23. Bf5 Bc6 24. g3 Ba4 25. Re7 Re8 26. Rh7 Kg8 27. Rg7 Kf8 28. Rg8 - Oct 13 12:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Re8 26. Rh7 Kg8 27. Rg7 Kf8
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. Ng5 a6 8. O-O fxg5 9. Bg5 h5 10. Bc4 Qc7 11. e5 Bg7 12. Qf3 Bxe5 13. Qxc6 Nf6 14. Bxf6 d5 15. f4 O-O 16. f5 e5 17. dxe5 Re8 18. Rfe1 Re2 19. Rxe2 gxf5 20. Re1 Bd7 21. Bd3 Rf8 22. Re8 Kh8 23. Bf5 Bc6 24. g3 Ba4 25. Re7 Re8 26. Rh7 Kg8 27. Rg7 Kf8 - Oct 13 12:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 25. Re7 Re8 26. Rh7 Kg8 27. Rg7
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. Ng5 a6 8. O-O fxg5 9. Bg5 h5 10. Bc4 Qc7 11. e5 Bg7 12. Qf3 Bxe5 13. Qxc6 Nf6 14. Bxf6 d5 15. f4 O-O 16. f5 e5 17. dxe5 Re8 18. Rfe1 Re2 19. Rxe2 gxf5 20. Re1 Bd7 21. Bd3 Rf8 22. Re8 Kh8 23. Bf5 Bc6 24. g3 Ba4 25. Re7 Re8 26. Rh7 Kg8 27. Rg7 - Oct 13 12:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Ba4 25. Re7 Re8 26. Rh7 Kg8
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. Ng5 a6 8. O-O fxg5 9. Bg5 h5 10. Bc4 Qc7 11. e5 Bg7 12. Qf3 Bxe5 13. Qxc6 Nf6 14. Bxf6 d5 15. f4 O-O 16. f5 e5 17. dxe5 Re8 18. Rfe1 Re2 19. Rxe2 gxf5 20. Re1 Bd7 21. Bd3 Rf8 22. Re8 Kh8 23. Bf5 Bc6 24. g3 Ba4 25. Re7 Re8 26. Rh7 Kg8 - Oct 13 12:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 24. g3 Ba4 25. Re7 Re8 26. Rh7
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. Ng5 a6 8. O-O fxg5 9. Bg5 h5 10. Bc4 Qc7 11. e5 Bg7 12. Qf3 Bxe5 13. Qxc6 Nf6 14. Bxf6 d5 15. f4 O-O 16. f5 e5 17. dxe5 Re8 18. Rfe1 Re2 19. Rxe2 gxf5 20. Re1 Bd7 21. Bd3 Rf8 22. Re8 Kh8 23. Bf5 Bc6 24. g3 Ba4 25. Re7 Re8 26. Rh7 - Oct 13 12:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Bc6 24. g3 Ba4 25. Re7 Re8
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. Ng5 a6 8. O-O fxg5 9. Bg5 h5 10. Bc4 Qc7 11. e5 Bg7 12. Qf3 Bxe5 13. Qxc6 Nf6 14. Bxf6 d5 15. f4 O-O 16. f5 e5 17. dxe5 Re8 18. Rfe1 Re2 19. Rxe2 gxf5 20. Re1 Bd7 21. Bd3 Rf8 22. Re8 Kh8 23. Bf5 Bc6 24. g3 Ba4 25. Re7 Re8