83.6M
positions
16.0M
practically solved
307.16T
engine nodes
2.3M
analyses
699
in queue
3
active workers
20
active cores
7.4M
nodes / sec
2.6
positions / min
85
proof number
4,551
disproof number
Root conquest: 0/20 first moves solved · 19.1% of tree positions solved · last 24h: 117,618 closures, 4.01T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 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 33s (median of 2) · measured at 2026-10-14 05:00 UTC
Closures by source, last 24h (117618 of 117618 labelled): USER 99.4% (116933) · FILL 0.5% (553) · AUTO 0.0% (16) · SOLVE 0.0% (0) · NONE 0.1% (116) · last 7d (1247555 of 1247555): USER 97.4% (1214536) · FILL 0.2% (3075) · AUTO 2.4% (29472) · SOLVE 0.0% (0) · NONE 0.0% (472). 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 Nh6 3. g4 c6 4. d4 e6 5. Rg1 Bb4 (User) · 10.00B nodes · randomchampgamer-2026PC-atomicdb
- 1. Nf3 f6 2. Nc3 c6 … 15. dxe5 Kf7 16. O-O-O Rh6 17. Rf3 (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 | 1083 | 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 34.1% of the fleet | 1.37T | 7,261 |
| 2 | Torom 32.2% of the fleet | 1.29T | 8,506 |
| 3 | randomchampgamer 15.1% of the fleet | 606.21B | 2,635 |
| 4 | RickEdinson 10.2% of the fleet | 409.38B | 2,311 |
| 5 | MoNiKaMaDnEsS 8.4% of the fleet | 338.46B | 2,044 |
5 accounts · 4.01T 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 16.3% 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 6.1% of the fleet | 18.79T | 133,536 |
| 6 | Torom 5.1% of the fleet | 15.70T | 113,354 |
| 7 | RickEdinson 4.2% of the fleet | 12.99T | 85,541 |
| 8 | JackIV 3.3% of the fleet | 10.06T | 67,859 |
| 9 | MoNiKaMaDnEsS 2.4% of the fleet | 7.36T | 49,626 |
| 10 | gannet 2.4% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 307.20T 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 05:44 Solved: BLACK_WIN via MINIMAXview
1. Nh3 f6 2. e4 d6 … 7. h3 g6 8. Rg1 Nd7 9. g4
1. Nh3 f6 2. e4 d6 3. Nc3 c6 4. Ng5 Qa5 5. Nxh7 Qa6 6. Na4 Kd8 7. h3 g6 8. Rg1 Nd7 9. g4 - Oct 14 05:43 Solved: BLACK_WIN via MINIMAXview
1. Nf3 f6 2. e4 e6 … 14. dxe5 Kf7 15. O-O-O Rh6 16. Bxc6
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 g5 13. Rf1 e5 14. dxe5 Kf7 15. O-O-O Rh6 16. Bxc6 - Oct 14 05:43 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 21. Ke2 Rd2 22. Ke3 Re2 23. Kd3
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 g5 13. Rf1 e5 14. dxe5 Kf7 15. O-O-O Rh6 16. Bxc6 Ba3 17. bxa3 Rb6 18. Rd5 Rb1 19. Kd2 Rd1 20. Ke3 Rd3 21. Ke2 Rd2 22. Ke3 Re2 23. Kd3 - Oct 14 05:43 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Rd3 21. Ke2 Rd2 22. Ke3 Re2
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 g5 13. Rf1 e5 14. dxe5 Kf7 15. O-O-O Rh6 16. Bxc6 Ba3 17. bxa3 Rb6 18. Rd5 Rb1 19. Kd2 Rd1 20. Ke3 Rd3 21. Ke2 Rd2 22. Ke3 Re2 - Oct 14 05:43 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 20. Ke3 Rd3 21. Ke2 Rd2 22. Ke3
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 g5 13. Rf1 e5 14. dxe5 Kf7 15. O-O-O Rh6 16. Bxc6 Ba3 17. bxa3 Rb6 18. Rd5 Rb1 19. Kd2 Rd1 20. Ke3 Rd3 21. Ke2 Rd2 22. Ke3 - Oct 14 05:43 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Rd1 20. Ke3 Rd3 21. Ke2 Rd2
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 g5 13. Rf1 e5 14. dxe5 Kf7 15. O-O-O Rh6 16. Bxc6 Ba3 17. bxa3 Rb6 18. Rd5 Rb1 19. Kd2 Rd1 20. Ke3 Rd3 21. Ke2 Rd2 - Oct 14 05:43 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 19. Kd2 Rd1 20. Ke3 Rd3 21. Ke2
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 g5 13. Rf1 e5 14. dxe5 Kf7 15. O-O-O Rh6 16. Bxc6 Ba3 17. bxa3 Rb6 18. Rd5 Rb1 19. Kd2 Rd1 20. Ke3 Rd3 21. Ke2 - Oct 14 05:43 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Rb1 19. Kd2 Rd1 20. Ke3 Rd3
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 g5 13. Rf1 e5 14. dxe5 Kf7 15. O-O-O Rh6 16. Bxc6 Ba3 17. bxa3 Rb6 18. Rd5 Rb1 19. Kd2 Rd1 20. Ke3 Rd3 - Oct 14 05:43 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 18. Rd5 Rb1 19. Kd2 Rd1 20. Ke3
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 g5 13. Rf1 e5 14. dxe5 Kf7 15. O-O-O Rh6 16. Bxc6 Ba3 17. bxa3 Rb6 18. Rd5 Rb1 19. Kd2 Rd1 20. Ke3 - Oct 14 05:43 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Rb6 18. Rd5 Rb1 19. Kd2 Rd1
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 g5 13. Rf1 e5 14. dxe5 Kf7 15. O-O-O Rh6 16. Bxc6 Ba3 17. bxa3 Rb6 18. Rd5 Rb1 19. Kd2 Rd1 - Oct 14 05:43 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 17. bxa3 Rb6 18. Rd5 Rb1 19. Kd2
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 g5 13. Rf1 e5 14. dxe5 Kf7 15. O-O-O Rh6 16. Bxc6 Ba3 17. bxa3 Rb6 18. Rd5 Rb1 19. Kd2 - Oct 14 05:43 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Ba3 17. bxa3 Rb6 18. Rd5 Rb1
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 g5 13. Rf1 e5 14. dxe5 Kf7 15. O-O-O Rh6 16. Bxc6 Ba3 17. bxa3 Rb6 18. Rd5 Rb1