82.0M
positions
15.7M
practically solved
299.15T
engine nodes
2.3M
analyses
2,942
in queue
10
active workers
48
active cores
15.1M
nodes / sec
28.8
positions / min
85
proof number
4,552
disproof number
Root conquest: 0/20 first moves solved · 19.2% of tree positions solved · last 24h: 82,471 closures, 3.87T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 70 over 217 open obligations, of which 41 (18.9%) 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 10.8m (median of 2) · measured at 2026-10-12 01:00 UTC
Closures by source, last 24h (82471 of 82471 labelled): USER 78.7% (64882) · FILL 0.8% (625) · AUTO 20.5% (16931) · SOLVE 0.0% (0) · NONE 0.0% (33) · last 7d (1591389 of 1591389): USER 98.0% (1559051) · FILL 0.2% (2696) · AUTO 1.8% (28883) · SOLVE 0.0% (0) · NONE 0.0% (759). 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 … Qa5 12. Qe2 Qb5 13. Qc4 f5 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 c6 … 17. hxg5 Rh2 18. Rxh2 Kg6 19. Ba4 (User) · 128.0M nodes · RickEdinson-MSI-atomicdb
- 1. Nf3 f6 2. e4 e6 … Qe4 15. Bd6 Bxd6 16. g3 Qe2 (User) · 128.0M nodes · Torom-torsten-pc-atomicdb#0
- 1. Nf3 f6 2. e4 e6 … b6 16. Bxe6 d6 17. Rfe1 Re8 (User) · 128.0M nodes · Torom-torsten-pc-atomicdb#1
- 1. Nf3 f6 2. e4 e6 … b6 16. Bd5 d6 17. Rae1 Ra7 (User) · 128.0M nodes · Torom-torsten-pc-atomicdb#2
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 | 1112 | 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 42.4% of the fleet | 1.64T | 12,655 |
| 2 | BManBJ 30.6% of the fleet | 1.18T | 9,999 |
| 3 | randomchampgamer 14.0% of the fleet | 541.57B | 3,792 |
| 4 | RickEdinson 10.0% of the fleet | 388.49B | 3,021 |
| 5 | MoNiKaMaDnEsS 3.0% of the fleet | 114.56B | 1,690 |
5 accounts · 3.87T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 30.2% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 15.7% of the fleet | 47.03T | 327,577 |
| 3 | tenzink 14.3% 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 | 18.16T | 130,741 |
| 6 | Torom 4.3% of the fleet | 12.83T | 93,972 |
| 7 | RickEdinson 4.0% of the fleet | 12.08T | 79,984 |
| 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 · 299.33T 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 01:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Qb6 11. Bd2 Qa5 12. Qa4 Kd8
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. Bf4 a6 8. c3 Bd6 9. Bxc6 d6 10. Nh4 Qb6 11. Bd2 Qa5 12. Qa4 Kd8 - Oct 12 01:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Qa5 12. Qa4 Kf8 13. Qe8 Kg7
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. Bf4 a6 8. c3 Bd6 9. Bxc6 d6 10. Nh4 Qb6 11. Bd2 Qa5 12. Qa4 Kf8 13. Qe8 Kg7 - Oct 12 01:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 11. Bd2 Qa5 12. Qa4 Kf8 13. Qe8
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. Bf4 a6 8. c3 Bd6 9. Bxc6 d6 10. Nh4 Qb6 11. Bd2 Qa5 12. Qa4 Kf8 13. Qe8 - Oct 12 01:53 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Qb6 11. Bd2 Qa5 12. Qa4 Kf8
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. Bf4 a6 8. c3 Bd6 9. Bxc6 d6 10. Nh4 Qb6 11. Bd2 Qa5 12. Qa4 Kf8 - Oct 12 01:53 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 19. Rfe1 h4 20. Rac1 h3 21. b3
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 Kh8 17. Be2 e5 18. f6 a5 19. Rfe1 h4 20. Rac1 h3 21. b3 - Oct 12 01:53 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 19. Rfe1 h4 20. Rac1 h3 21. a3
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 Kh8 17. Be2 e5 18. f6 a5 19. Rfe1 h4 20. Rac1 h3 21. a3 - Oct 12 01:52 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. e4 e6 … Kf7 16. hxg5 Rh4 17. Rxh4 Bg7
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 d6 13. h4 g5 14. f6 a5 15. g4 Kf7 16. hxg5 Rh4 17. Rxh4 Bg7 - Oct 12 01:52 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. e4 e6 … Kf7 16. hxg5 Rh4 17. Rxh4 Be7
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 d6 13. h4 g5 14. f6 a5 15. g4 Kf7 16. hxg5 Rh4 17. Rxh4 Be7 - Oct 12 01:52 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. e4 e6 … Kf7 16. hxg5 Rh4 17. Rxh4 Ne7
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 d6 13. h4 g5 14. f6 a5 15. g4 Kf7 16. hxg5 Rh4 17. Rxh4 Ne7 - Oct 12 01:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Be3 28. Ke2 Kd6 29. f8=Q Ke5
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 d6 13. h4 g5 14. f6 a5 15. g4 Kf7 16. hxg5 Rh4 17. Rxh4 Ne7 18. g5 Kg8 19. Kf2 Bh6 20. Rh1 Nf5 21. exf5 e5 22. f7 Kf8 23. Bd7 Ra6 24. g6 d5 25. g7 Ke7 26. g8=Q Rf6 27. dxe5 Be3 28. Ke2 Kd6 29. f8=Q Ke5 - Oct 12 01:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 27. dxe5 Be3 28. Ke2 Kd6 29. f8=Q
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 d6 13. h4 g5 14. f6 a5 15. g4 Kf7 16. hxg5 Rh4 17. Rxh4 Ne7 18. g5 Kg8 19. Kf2 Bh6 20. Rh1 Nf5 21. exf5 e5 22. f7 Kf8 23. Bd7 Ra6 24. g6 d5 25. g7 Ke7 26. g8=Q Rf6 27. dxe5 Be3 28. Ke2 Kd6 29. f8=Q - Oct 12 01:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Rf6 27. dxe5 Be3 28. Ke2 Kd6
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 d6 13. h4 g5 14. f6 a5 15. g4 Kf7 16. hxg5 Rh4 17. Rxh4 Ne7 18. g5 Kg8 19. Kf2 Bh6 20. Rh1 Nf5 21. exf5 e5 22. f7 Kf8 23. Bd7 Ra6 24. g6 d5 25. g7 Ke7 26. g8=Q Rf6 27. dxe5 Be3 28. Ke2 Kd6