84.5M
positions
16.2M
practically solved
310.23T
engine nodes
2.4M
analyses
239
in queue
7
active workers
40
active cores
5.5M
nodes / sec
14.8
positions / min
127
proof number
4,617
disproof number
Root conquest: 0/20 first moves solved · 19.1% of tree positions solved · last 24h: 142,767 closures, 2.32T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 72 over 213 open obligations, of which 40 (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 58s (median of 2) · measured at 2026-10-15 16:00 UTC
Closures by source, last 24h (142767 of 142767 labelled): USER 80.1% (114327) · FILL 1.9% (2779) · AUTO 17.9% (25595) · SOLVE 0.0% (0) · NONE 0.0% (66) · last 7d (906876 of 906876): USER 94.7% (858875) · FILL 0.5% (4383) · AUTO 4.8% (43140) · SOLVE 0.0% (0) · NONE 0.1% (478). 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 … Rf5 15. O-O a6 16. Nc3 Rf7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Rf5 15. O-O a6 16. Nc3 Rf6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … Rf5 15. O-O a6 16. Nc3 Ra8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. Nc3 Nh6 … h6 18. Qd2 a5 19. Bxa8 Kf7 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … Re8 15. Ba6 bxa6 16. a4 e5 (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 | 1122 | 2 | |
| g1h3 | unsolved | 763 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 400 | 2 | |
| e2e4 | unsolved | 400 | 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 | BManBJ 43.9% of the fleet | 1.02T | 11,399 |
| 2 | randomchampgamer 25.7% of the fleet | 594.78B | 5,210 |
| 3 | RickEdinson 18.4% of the fleet | 427.35B | 3,874 |
| 4 | MoNiKaMaDnEsS 12.0% of the fleet | 278.79B | 2,339 |
| 5 | NeoArcturus <0.1% of the fleet | 144.9M | 4 |
5 accounts · 2.32T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 29.1% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 16.4% of the fleet | 50.96T | 355,940 |
| 3 | tenzink 13.8% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.1% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 6.4% of the fleet | 19.73T | 140,232 |
| 6 | Torom 5.1% of the fleet | 15.70T | 113,354 |
| 7 | RickEdinson 4.4% of the fleet | 13.58T | 90,133 |
| 8 | JackIV 3.2% of the fleet | 10.06T | 67,859 |
| 9 | MoNiKaMaDnEsS 2.6% of the fleet | 7.93T | 53,396 |
| 10 | gannet 2.3% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 310.32T 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 15 16:48 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. e4 e6 … h6 18. Qd2 a5 19. Bxa8 Kg7
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 g6 6. Nh4 Nxg4 7. Rg1 d6 8. Bf4 Qa5 9. Bh6 Bxh6 10. e5 b6 11. Ba6 Nd7 12. a3 Nxe5 13. Qe2 Qg5 14. Rxg5 O-O 15. Bb7 b5 16. Nd5 cxd5 17. c4 h6 18. Qd2 a5 19. Bxa8 Kg7 - Oct 15 16:48 Solved: BLACK_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 15. Nc3 Rf5 16. O-O Rh5 17. b3
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. Nd8 Na6 8. Qh5 g6 9. Qg5 Nf6 10. Ne6 Bh6 11. Qxg6 Nc7 12. Bxc6 Kd7 13. g3 Raf8 14. f3 a6 15. Nc3 Rf5 16. O-O Rh5 17. b3 - Oct 15 16:48 Solved: BLACK_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 15. Nc3 Rf5 16. O-O Rh5 17. a3
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. Nd8 Na6 8. Qh5 g6 9. Qg5 Nf6 10. Ne6 Bh6 11. Qxg6 Nc7 12. Bxc6 Kd7 13. g3 Raf8 14. f3 a6 15. Nc3 Rf5 16. O-O Rh5 17. a3 - Oct 15 16:47 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. e4 e6 … h6 18. Qd2 a5 19. Bxa8 Ba6
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 g6 6. Nh4 Nxg4 7. Rg1 d6 8. Bf4 Qa5 9. Bh6 Bxh6 10. e5 b6 11. Ba6 Nd7 12. a3 Nxe5 13. Qe2 Qg5 14. Rxg5 O-O 15. Bb7 b5 16. Nd5 cxd5 17. c4 h6 18. Qd2 a5 19. Bxa8 Ba6 - Oct 15 16:47 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Kf4 31. b8=Q g4 32. Re4 Kf3
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 g6 6. Nh4 Nxg4 7. Rg1 d6 8. Bf4 Qa5 9. Bh6 Bxh6 10. e5 b6 11. Ba6 Nd7 12. a3 Nxe5 13. Qe2 Qg5 14. Rxg5 O-O 15. Bb7 b5 16. Nd5 cxd5 17. c4 h6 18. Qd2 a5 19. Bxa8 Ba6 20. cxb5 Rc8 21. b4 h5 22. Qc1 Rc2 23. Qxc2 Kg7 24. b5 Kh6 25. Rc1 h4 26. b6 Kg5 27. b7 Kf4 28. Rc3 g5 29. Rf3 Ke4 30. Re3 Kf4 31. b8=Q g4 32. Re4 Kf3 - Oct 15 16:47 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 30. Re3 Kf4 31. b8=Q g4 32. Re4
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 g6 6. Nh4 Nxg4 7. Rg1 d6 8. Bf4 Qa5 9. Bh6 Bxh6 10. e5 b6 11. Ba6 Nd7 12. a3 Nxe5 13. Qe2 Qg5 14. Rxg5 O-O 15. Bb7 b5 16. Nd5 cxd5 17. c4 h6 18. Qd2 a5 19. Bxa8 Ba6 20. cxb5 Rc8 21. b4 h5 22. Qc1 Rc2 23. Qxc2 Kg7 24. b5 Kh6 25. Rc1 h4 26. b6 Kg5 27. b7 Kf4 28. Rc3 g5 29. Rf3 Ke4 30. Re3 Kf4 31. b8=Q g4 32. Re4 - Oct 15 16:47 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Ke4 30. Re3 Kf4 31. b8=Q g4
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 g6 6. Nh4 Nxg4 7. Rg1 d6 8. Bf4 Qa5 9. Bh6 Bxh6 10. e5 b6 11. Ba6 Nd7 12. a3 Nxe5 13. Qe2 Qg5 14. Rxg5 O-O 15. Bb7 b5 16. Nd5 cxd5 17. c4 h6 18. Qd2 a5 19. Bxa8 Ba6 20. cxb5 Rc8 21. b4 h5 22. Qc1 Rc2 23. Qxc2 Kg7 24. b5 Kh6 25. Rc1 h4 26. b6 Kg5 27. b7 Kf4 28. Rc3 g5 29. Rf3 Ke4 30. Re3 Kf4 31. b8=Q g4 - Oct 15 16:47 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 29. Rf3 Ke4 30. Re3 Kf4 31. b8=Q
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 g6 6. Nh4 Nxg4 7. Rg1 d6 8. Bf4 Qa5 9. Bh6 Bxh6 10. e5 b6 11. Ba6 Nd7 12. a3 Nxe5 13. Qe2 Qg5 14. Rxg5 O-O 15. Bb7 b5 16. Nd5 cxd5 17. c4 h6 18. Qd2 a5 19. Bxa8 Ba6 20. cxb5 Rc8 21. b4 h5 22. Qc1 Rc2 23. Qxc2 Kg7 24. b5 Kh6 25. Rc1 h4 26. b6 Kg5 27. b7 Kf4 28. Rc3 g5 29. Rf3 Ke4 30. Re3 Kf4 31. b8=Q - Oct 15 16:47 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … g5 29. Rf3 Ke4 30. Re3 Kf4
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 g6 6. Nh4 Nxg4 7. Rg1 d6 8. Bf4 Qa5 9. Bh6 Bxh6 10. e5 b6 11. Ba6 Nd7 12. a3 Nxe5 13. Qe2 Qg5 14. Rxg5 O-O 15. Bb7 b5 16. Nd5 cxd5 17. c4 h6 18. Qd2 a5 19. Bxa8 Ba6 20. cxb5 Rc8 21. b4 h5 22. Qc1 Rc2 23. Qxc2 Kg7 24. b5 Kh6 25. Rc1 h4 26. b6 Kg5 27. b7 Kf4 28. Rc3 g5 29. Rf3 Ke4 30. Re3 Kf4 - Oct 15 16:47 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 28. Rc3 g5 29. Rf3 Ke4 30. Re3
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 g6 6. Nh4 Nxg4 7. Rg1 d6 8. Bf4 Qa5 9. Bh6 Bxh6 10. e5 b6 11. Ba6 Nd7 12. a3 Nxe5 13. Qe2 Qg5 14. Rxg5 O-O 15. Bb7 b5 16. Nd5 cxd5 17. c4 h6 18. Qd2 a5 19. Bxa8 Ba6 20. cxb5 Rc8 21. b4 h5 22. Qc1 Rc2 23. Qxc2 Kg7 24. b5 Kh6 25. Rc1 h4 26. b6 Kg5 27. b7 Kf4 28. Rc3 g5 29. Rf3 Ke4 30. Re3 - Oct 15 16:47 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Kf4 28. Rc3 g5 29. Rf3 Ke4
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 g6 6. Nh4 Nxg4 7. Rg1 d6 8. Bf4 Qa5 9. Bh6 Bxh6 10. e5 b6 11. Ba6 Nd7 12. a3 Nxe5 13. Qe2 Qg5 14. Rxg5 O-O 15. Bb7 b5 16. Nd5 cxd5 17. c4 h6 18. Qd2 a5 19. Bxa8 Ba6 20. cxb5 Rc8 21. b4 h5 22. Qc1 Rc2 23. Qxc2 Kg7 24. b5 Kh6 25. Rc1 h4 26. b6 Kg5 27. b7 Kf4 28. Rc3 g5 29. Rf3 Ke4 - Oct 15 16:47 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 27. b7 Kf4 28. Rc3 g5 29. Rf3
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 g6 6. Nh4 Nxg4 7. Rg1 d6 8. Bf4 Qa5 9. Bh6 Bxh6 10. e5 b6 11. Ba6 Nd7 12. a3 Nxe5 13. Qe2 Qg5 14. Rxg5 O-O 15. Bb7 b5 16. Nd5 cxd5 17. c4 h6 18. Qd2 a5 19. Bxa8 Ba6 20. cxb5 Rc8 21. b4 h5 22. Qc1 Rc2 23. Qxc2 Kg7 24. b5 Kh6 25. Rc1 h4 26. b6 Kg5 27. b7 Kf4 28. Rc3 g5 29. Rf3