83.7M
positions
16.0M
practically solved
307.44T
engine nodes
2.3M
analyses
0
in queue
2
active workers
12
active cores
8.7M
nodes / sec
1.0
positions / min
85
proof number
4,551
disproof number
Root conquest: 0/20 first moves solved · 19.1% of tree positions solved · last 24h: 95,636 closures, 3.11T 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 13.5h (median of 1) · measured at 2026-10-14 09:00 UTC
Closures by source, last 24h (95636 of 95636 labelled): USER 99.6% (95236) · FILL 0.3% (258) · AUTO 0.0% (15) · SOLVE 0.0% (0) · NONE 0.1% (127) · last 7d (1194629 of 1194629): USER 97.2% (1161585) · FILL 0.3% (3077) · AUTO 2.5% (29472) · SOLVE 0.0% (0) · NONE 0.0% (495). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- deep line, ply ≥49 · … Bc1 Rf5 Bd2 a3 (Fill) · 512.0M nodes · MoNiKaMaDnEsS-DESKTOP-VG9VPVH-atomicdb
- deep line, ply ≥40 · … Rad8 Rf5 Bd2 Ka2 (Fill) · 512.0M 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 | 1134 | 2 | |
| g1h3 | unsolved | 703 | 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 | -65 | 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 36.2% of the fleet | 1.13T | 5,665 |
| 2 | randomchampgamer 20.8% of the fleet | 647.23B | 2,645 |
| 3 | Torom 20.1% of the fleet | 622.87B | 3,830 |
| 4 | RickEdinson 11.8% of the fleet | 366.72B | 2,053 |
| 5 | MoNiKaMaDnEsS 11.1% of the fleet | 344.63B | 1,882 |
5 accounts · 3.11T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 29.4% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 16.2% of the fleet | 49.94T | 344,541 |
| 3 | tenzink 13.9% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.2% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 6.2% of the fleet | 18.93T | 134,156 |
| 6 | Torom 5.1% of the fleet | 15.70T | 113,354 |
| 7 | RickEdinson 4.2% of the fleet | 13.02T | 85,770 |
| 8 | JackIV 3.3% of the fleet | 10.06T | 67,859 |
| 9 | MoNiKaMaDnEsS 2.4% of the fleet | 7.47T | 50,170 |
| 10 | gannet 2.4% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 307.49T 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 14 09:28 Solved: WHITE_WIN via MATE_PVview
1. g4 e6 2. Nf3 f6 … Kf6 26. Qf8 Ke6 27. Qf7 Kd6
1. g4 e6 2. Nf3 f6 3. Nc3 c6 4. d4 Nh6 5. e4 Bb4 6. e5 fxe5 7. Ng5 d5 8. h4 e5 9. Qe2 Nxg4 10. f3 Qc7 11. Bh3 Bg4 12. O-O O-O 13. Nb5 e4 14. Nxc7 Kh8 15. Bg5 Bxf3 16. Rf7 Rxf7 17. Bc8 Be1 18. Bxb7 c5 19. Rxe1 a5 20. b4 c4 21. b5 e3 22. Bxe3 g5 23. b6 Kg7 24. b7 g4 25. b8=Q Kf6 26. Qf8 Ke6 27. Qf7 Kd6 - Oct 14 09:28 Solved: WHITE_WIN via MATE_PVview
1. g4 e6 2. Nf3 f6 … 25. b8=Q Kf6 26. Qf8 Ke6 27. Qf7
1. g4 e6 2. Nf3 f6 3. Nc3 c6 4. d4 Nh6 5. e4 Bb4 6. e5 fxe5 7. Ng5 d5 8. h4 e5 9. Qe2 Nxg4 10. f3 Qc7 11. Bh3 Bg4 12. O-O O-O 13. Nb5 e4 14. Nxc7 Kh8 15. Bg5 Bxf3 16. Rf7 Rxf7 17. Bc8 Be1 18. Bxb7 c5 19. Rxe1 a5 20. b4 c4 21. b5 e3 22. Bxe3 g5 23. b6 Kg7 24. b7 g4 25. b8=Q Kf6 26. Qf8 Ke6 27. Qf7 - Oct 14 09:28 Solved: WHITE_WIN via MATE_PVview
1. g4 e6 2. Nf3 f6 … g4 25. b8=Q Kf6 26. Qf8 Ke6
1. g4 e6 2. Nf3 f6 3. Nc3 c6 4. d4 Nh6 5. e4 Bb4 6. e5 fxe5 7. Ng5 d5 8. h4 e5 9. Qe2 Nxg4 10. f3 Qc7 11. Bh3 Bg4 12. O-O O-O 13. Nb5 e4 14. Nxc7 Kh8 15. Bg5 Bxf3 16. Rf7 Rxf7 17. Bc8 Be1 18. Bxb7 c5 19. Rxe1 a5 20. b4 c4 21. b5 e3 22. Bxe3 g5 23. b6 Kg7 24. b7 g4 25. b8=Q Kf6 26. Qf8 Ke6 - Oct 14 09:28 Solved: WHITE_WIN via MATE_PVview
1. g4 e6 2. Nf3 f6 … 24. b7 g4 25. b8=Q Kf6 26. Qf8
1. g4 e6 2. Nf3 f6 3. Nc3 c6 4. d4 Nh6 5. e4 Bb4 6. e5 fxe5 7. Ng5 d5 8. h4 e5 9. Qe2 Nxg4 10. f3 Qc7 11. Bh3 Bg4 12. O-O O-O 13. Nb5 e4 14. Nxc7 Kh8 15. Bg5 Bxf3 16. Rf7 Rxf7 17. Bc8 Be1 18. Bxb7 c5 19. Rxe1 a5 20. b4 c4 21. b5 e3 22. Bxe3 g5 23. b6 Kg7 24. b7 g4 25. b8=Q Kf6 26. Qf8 - Oct 14 09:28 Solved: WHITE_WIN via MATE_PVview
1. g4 e6 2. Nf3 f6 … Kg7 24. b7 g4 25. b8=Q Kf6
1. g4 e6 2. Nf3 f6 3. Nc3 c6 4. d4 Nh6 5. e4 Bb4 6. e5 fxe5 7. Ng5 d5 8. h4 e5 9. Qe2 Nxg4 10. f3 Qc7 11. Bh3 Bg4 12. O-O O-O 13. Nb5 e4 14. Nxc7 Kh8 15. Bg5 Bxf3 16. Rf7 Rxf7 17. Bc8 Be1 18. Bxb7 c5 19. Rxe1 a5 20. b4 c4 21. b5 e3 22. Bxe3 g5 23. b6 Kg7 24. b7 g4 25. b8=Q Kf6 - Oct 14 09:28 Solved: WHITE_WIN via MATE_PVview
1. g4 e6 2. Nf3 f6 … 23. b6 Kg7 24. b7 g4 25. b8=Q
1. g4 e6 2. Nf3 f6 3. Nc3 c6 4. d4 Nh6 5. e4 Bb4 6. e5 fxe5 7. Ng5 d5 8. h4 e5 9. Qe2 Nxg4 10. f3 Qc7 11. Bh3 Bg4 12. O-O O-O 13. Nb5 e4 14. Nxc7 Kh8 15. Bg5 Bxf3 16. Rf7 Rxf7 17. Bc8 Be1 18. Bxb7 c5 19. Rxe1 a5 20. b4 c4 21. b5 e3 22. Bxe3 g5 23. b6 Kg7 24. b7 g4 25. b8=Q - Oct 14 09:28 Solved: WHITE_WIN via MATE_PVview
1. g4 e6 2. Nf3 f6 … g5 23. b6 Kg7 24. b7 g4
1. g4 e6 2. Nf3 f6 3. Nc3 c6 4. d4 Nh6 5. e4 Bb4 6. e5 fxe5 7. Ng5 d5 8. h4 e5 9. Qe2 Nxg4 10. f3 Qc7 11. Bh3 Bg4 12. O-O O-O 13. Nb5 e4 14. Nxc7 Kh8 15. Bg5 Bxf3 16. Rf7 Rxf7 17. Bc8 Be1 18. Bxb7 c5 19. Rxe1 a5 20. b4 c4 21. b5 e3 22. Bxe3 g5 23. b6 Kg7 24. b7 g4 - Oct 14 09:28 Solved: WHITE_WIN via MATE_PVview
1. g4 e6 2. Nf3 f6 … 22. Bxe3 g5 23. b6 Kg7 24. b7
1. g4 e6 2. Nf3 f6 3. Nc3 c6 4. d4 Nh6 5. e4 Bb4 6. e5 fxe5 7. Ng5 d5 8. h4 e5 9. Qe2 Nxg4 10. f3 Qc7 11. Bh3 Bg4 12. O-O O-O 13. Nb5 e4 14. Nxc7 Kh8 15. Bg5 Bxf3 16. Rf7 Rxf7 17. Bc8 Be1 18. Bxb7 c5 19. Rxe1 a5 20. b4 c4 21. b5 e3 22. Bxe3 g5 23. b6 Kg7 24. b7 - Oct 14 09:28 Solved: WHITE_WIN via MATE_PVview
1. g4 e6 2. Nf3 f6 … e3 22. Bxe3 g5 23. b6 Kg7
1. g4 e6 2. Nf3 f6 3. Nc3 c6 4. d4 Nh6 5. e4 Bb4 6. e5 fxe5 7. Ng5 d5 8. h4 e5 9. Qe2 Nxg4 10. f3 Qc7 11. Bh3 Bg4 12. O-O O-O 13. Nb5 e4 14. Nxc7 Kh8 15. Bg5 Bxf3 16. Rf7 Rxf7 17. Bc8 Be1 18. Bxb7 c5 19. Rxe1 a5 20. b4 c4 21. b5 e3 22. Bxe3 g5 23. b6 Kg7 - Oct 14 09:28 Solved: WHITE_WIN via MATE_PVview
1. g4 e6 2. Nf3 f6 … 21. b5 e3 22. Bxe3 g5 23. b6
1. g4 e6 2. Nf3 f6 3. Nc3 c6 4. d4 Nh6 5. e4 Bb4 6. e5 fxe5 7. Ng5 d5 8. h4 e5 9. Qe2 Nxg4 10. f3 Qc7 11. Bh3 Bg4 12. O-O O-O 13. Nb5 e4 14. Nxc7 Kh8 15. Bg5 Bxf3 16. Rf7 Rxf7 17. Bc8 Be1 18. Bxb7 c5 19. Rxe1 a5 20. b4 c4 21. b5 e3 22. Bxe3 g5 23. b6 - Oct 14 09:28 Solved: WHITE_WIN via MATE_PVview
1. g4 e6 2. Nf3 f6 … c4 21. b5 e3 22. Bxe3 g5
1. g4 e6 2. Nf3 f6 3. Nc3 c6 4. d4 Nh6 5. e4 Bb4 6. e5 fxe5 7. Ng5 d5 8. h4 e5 9. Qe2 Nxg4 10. f3 Qc7 11. Bh3 Bg4 12. O-O O-O 13. Nb5 e4 14. Nxc7 Kh8 15. Bg5 Bxf3 16. Rf7 Rxf7 17. Bc8 Be1 18. Bxb7 c5 19. Rxe1 a5 20. b4 c4 21. b5 e3 22. Bxe3 g5 - Oct 14 09:28 Solved: WHITE_WIN via MATE_PVview
1. g4 e6 2. Nf3 f6 … 20. b4 c4 21. b5 e3 22. Bxe3
1. g4 e6 2. Nf3 f6 3. Nc3 c6 4. d4 Nh6 5. e4 Bb4 6. e5 fxe5 7. Ng5 d5 8. h4 e5 9. Qe2 Nxg4 10. f3 Qc7 11. Bh3 Bg4 12. O-O O-O 13. Nb5 e4 14. Nxc7 Kh8 15. Bg5 Bxf3 16. Rf7 Rxf7 17. Bc8 Be1 18. Bxb7 c5 19. Rxe1 a5 20. b4 c4 21. b5 e3 22. Bxe3