99.4M
positions
20.8M
practically solved
361.00T
engine nodes
2.7M
analyses
985
in queue
13
active workers
60
active cores
82.1M
nodes / sec
34.4
positions / min
108
proof number
4,747
disproof number
Root conquest: 0/20 first moves solved · 20.9% of tree positions solved · last 24h: 263,669 closures, 7.74T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 over 200 open obligations, of which 37 (18.5%) 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 1.2m (median of 42) · measured at 2026-10-24 19:00 UTC
Closures by source, last 24h (263669 of 263669 labelled): USER 100.0% (263588) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.0% (81) · last 7d (4137426 of 4137426): USER 99.5% (4117343) · FILL 0.2% (9042) · AUTO 0.2% (8185) · SOLVE 0.0% (0) · NONE 0.1% (2856). 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. Nc3 c6 … 13. cxd5 Nc6 14. Qa4 O-O 15. Rb1 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … 20. Ne8 Ng8 21. h3 f4 22. Bxa6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. e4 e6 … 5. Nc7 Qxc7 6. Ba6 Nh6 7. Bc8 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. Nc3 c6 … 13. cxd5 Nc6 14. Qa4 O-O 15. Bc4 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … a6 8. d5 g6 9. b4 O-O-O (User) · 128.0M nodes · RickEdinson-MSI-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 | 1224 | 2 | |
| g1h3 | unsolved | 745 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 401 | 2 | |
| e2e4 | unsolved | 401 | 2 | |
| b1c3 | unsolved | 138 | 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 | Torom 66.0% of the fleet | 5.11T | 38,740 |
| 2 | BManBJ 21.6% of the fleet | 1.68T | 11,654 |
| 3 | MoNiKaMaDnEsS 6.2% of the fleet | 480.87B | 3,699 |
| 4 | RickEdinson 6.1% of the fleet | 473.24B | 3,351 |
4 accounts · 7.74T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 25.0% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 18.4% of the fleet | 66.54T | 473,084 |
| 3 | Torom 12.1% of the fleet | 43.76T | 319,457 |
| 4 | tenzink 11.9% of the fleet | 42.83T | 349,427 |
| 5 | auranvesdranor 8.7% of the fleet | 31.40T | 228,002 |
| 6 | randomchampgamer 5.5% of the fleet | 19.85T | 140,897 |
| 7 | RickEdinson 4.9% of the fleet | 17.84T | 118,385 |
| 8 | MoNiKaMaDnEsS 2.9% of the fleet | 10.55T | 73,466 |
| 9 | JackIV 2.8% of the fleet | 10.06T | 67,859 |
| 10 | gannet 2.0% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 361.06T 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 24 19:18 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 13. cxd5 Nc6 14. Qa4 Qg5 15. a3
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. O-O h6 8. h3 Bb4 9. c3 d6 10. Kh1 f5 11. e5 d5 12. c4 Ne7 13. cxd5 Nc6 14. Qa4 Qg5 15. a3 - Oct 24 19:18 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. e4 e6 … Ne7 13. cxd5 Nc6 14. Qa4 Qd6
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. O-O h6 8. h3 Bb4 9. c3 d6 10. Kh1 f5 11. e5 d5 12. c4 Ne7 13. cxd5 Nc6 14. Qa4 Qd6 - Oct 24 19:18 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Be7 26. Qe8 g5 27. Qg8 Kf6
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. O-O h6 8. h3 Bb4 9. c3 d6 10. Kh1 f5 11. e5 d5 12. c4 Ne7 13. cxd5 Nc6 14. Qa4 Qd6 15. exd6 Kf8 16. Bf4 Bd7 17. Bxd7 b5 18. Qa6 Rh7 19. Rfc1 Rd8 20. Rc7 Rdd7 21. Bxh6 Ba3 22. Rxd7 Kg7 23. Qb7 Be7 24. Qc8 Bd8 25. Qd7 Be7 26. Qe8 g5 27. Qg8 Kf6 - Oct 24 19:18 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 25. Qd7 Be7 26. Qe8 g5 27. Qg8
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. O-O h6 8. h3 Bb4 9. c3 d6 10. Kh1 f5 11. e5 d5 12. c4 Ne7 13. cxd5 Nc6 14. Qa4 Qd6 15. exd6 Kf8 16. Bf4 Bd7 17. Bxd7 b5 18. Qa6 Rh7 19. Rfc1 Rd8 20. Rc7 Rdd7 21. Bxh6 Ba3 22. Rxd7 Kg7 23. Qb7 Be7 24. Qc8 Bd8 25. Qd7 Be7 26. Qe8 g5 27. Qg8 - Oct 24 19:18 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Bd8 25. Qd7 Be7 26. Qe8 g5
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. O-O h6 8. h3 Bb4 9. c3 d6 10. Kh1 f5 11. e5 d5 12. c4 Ne7 13. cxd5 Nc6 14. Qa4 Qd6 15. exd6 Kf8 16. Bf4 Bd7 17. Bxd7 b5 18. Qa6 Rh7 19. Rfc1 Rd8 20. Rc7 Rdd7 21. Bxh6 Ba3 22. Rxd7 Kg7 23. Qb7 Be7 24. Qc8 Bd8 25. Qd7 Be7 26. Qe8 g5 - Oct 24 19:18 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 24. Qc8 Bd8 25. Qd7 Be7 26. Qe8
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. O-O h6 8. h3 Bb4 9. c3 d6 10. Kh1 f5 11. e5 d5 12. c4 Ne7 13. cxd5 Nc6 14. Qa4 Qd6 15. exd6 Kf8 16. Bf4 Bd7 17. Bxd7 b5 18. Qa6 Rh7 19. Rfc1 Rd8 20. Rc7 Rdd7 21. Bxh6 Ba3 22. Rxd7 Kg7 23. Qb7 Be7 24. Qc8 Bd8 25. Qd7 Be7 26. Qe8 - Oct 24 19:18 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Be7 24. Qc8 Bd8 25. Qd7 Be7
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. O-O h6 8. h3 Bb4 9. c3 d6 10. Kh1 f5 11. e5 d5 12. c4 Ne7 13. cxd5 Nc6 14. Qa4 Qd6 15. exd6 Kf8 16. Bf4 Bd7 17. Bxd7 b5 18. Qa6 Rh7 19. Rfc1 Rd8 20. Rc7 Rdd7 21. Bxh6 Ba3 22. Rxd7 Kg7 23. Qb7 Be7 24. Qc8 Bd8 25. Qd7 Be7 - Oct 24 19:18 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 23. Qb7 Be7 24. Qc8 Bd8 25. Qd7
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. O-O h6 8. h3 Bb4 9. c3 d6 10. Kh1 f5 11. e5 d5 12. c4 Ne7 13. cxd5 Nc6 14. Qa4 Qd6 15. exd6 Kf8 16. Bf4 Bd7 17. Bxd7 b5 18. Qa6 Rh7 19. Rfc1 Rd8 20. Rc7 Rdd7 21. Bxh6 Ba3 22. Rxd7 Kg7 23. Qb7 Be7 24. Qc8 Bd8 25. Qd7 - Oct 24 19:18 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Kg7 23. Qb7 Be7 24. Qc8 Bd8
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. O-O h6 8. h3 Bb4 9. c3 d6 10. Kh1 f5 11. e5 d5 12. c4 Ne7 13. cxd5 Nc6 14. Qa4 Qd6 15. exd6 Kf8 16. Bf4 Bd7 17. Bxd7 b5 18. Qa6 Rh7 19. Rfc1 Rd8 20. Rc7 Rdd7 21. Bxh6 Ba3 22. Rxd7 Kg7 23. Qb7 Be7 24. Qc8 Bd8 - Oct 24 19:18 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 22. Rxd7 Kg7 23. Qb7 Be7 24. Qc8
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. O-O h6 8. h3 Bb4 9. c3 d6 10. Kh1 f5 11. e5 d5 12. c4 Ne7 13. cxd5 Nc6 14. Qa4 Qd6 15. exd6 Kf8 16. Bf4 Bd7 17. Bxd7 b5 18. Qa6 Rh7 19. Rfc1 Rd8 20. Rc7 Rdd7 21. Bxh6 Ba3 22. Rxd7 Kg7 23. Qb7 Be7 24. Qc8 - Oct 24 19:18 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Ba3 22. Rxd7 Kg7 23. Qb7 Be7
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. O-O h6 8. h3 Bb4 9. c3 d6 10. Kh1 f5 11. e5 d5 12. c4 Ne7 13. cxd5 Nc6 14. Qa4 Qd6 15. exd6 Kf8 16. Bf4 Bd7 17. Bxd7 b5 18. Qa6 Rh7 19. Rfc1 Rd8 20. Rc7 Rdd7 21. Bxh6 Ba3 22. Rxd7 Kg7 23. Qb7 Be7 - Oct 24 19:18 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 21. Bxh6 Ba3 22. Rxd7 Kg7 23. Qb7
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. O-O h6 8. h3 Bb4 9. c3 d6 10. Kh1 f5 11. e5 d5 12. c4 Ne7 13. cxd5 Nc6 14. Qa4 Qd6 15. exd6 Kf8 16. Bf4 Bd7 17. Bxd7 b5 18. Qa6 Rh7 19. Rfc1 Rd8 20. Rc7 Rdd7 21. Bxh6 Ba3 22. Rxd7 Kg7 23. Qb7