91.9M
positions
18.2M
practically solved
336.81T
engine nodes
2.5M
analyses
1,797
in queue
6
active workers
34
active cores
0
nodes / sec
17.4
positions / min
143
proof number
4,658
disproof number
Root conquest: 0/20 first moves solved · 19.8% of tree positions solved · last 24h: 836,780 closures, 7.49T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 over 205 open obligations, of which 37 (18.0%) 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 4.3m (median of 84) · measured at 2026-10-21 12:00 UTC
Closures by source, last 24h (836719 of 836719 labelled): USER 99.7% (834076) · FILL 0.3% (2220) · AUTO 0.0% (320) · SOLVE 0.0% (0) · NONE 0.0% (103) · last 7d (2052603 of 2052603): USER 96.0% (1971012) · FILL 0.5% (11166) · AUTO 3.3% (67528) · SOLVE 0.0% (0) · NONE 0.1% (2897). 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 … b4 16. a4 e5 17. O-O h4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … b4 16. a4 e5 17. O-O g5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … b4 16. a4 e5 17. O-O exd4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 d6 2. Ng5 f5 … h6 13. O-O Nd3 14. cxd3 Rf8 (User) · 128.0M nodes · MoNiKaMaDnEsS-DESKTOP-VG9VPVH-atomicdb
- deep line, ply ≥22 · … f5 Rd8 Be3 Ng5 (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 | 1098 | 2 | |
| g1h3 | unsolved | 630 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 402 | 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 | Torom 63.4% of the fleet | 4.74T | 34,831 |
| 2 | BManBJ 25.3% of the fleet | 1.89T | 14,440 |
| 3 | RickEdinson 6.6% of the fleet | 494.13B | 2,778 |
| 4 | MoNiKaMaDnEsS 4.6% of the fleet | 341.05B | 2,350 |
| 5 | Imusing 0.2% of the fleet | 12.07B | 95 |
5 accounts · 7.49T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 26.8% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 17.9% of the fleet | 60.45T | 427,697 |
| 3 | tenzink 12.7% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 9.3% of the fleet | 31.40T | 228,002 |
| 5 | Torom 8.5% of the fleet | 28.74T | 205,385 |
| 6 | randomchampgamer 5.9% of the fleet | 19.85T | 140,897 |
| 7 | RickEdinson 4.8% of the fleet | 16.27T | 107,779 |
| 8 | JackIV 3.0% of the fleet | 10.06T | 67,859 |
| 9 | MoNiKaMaDnEsS 2.8% of the fleet | 9.27T | 63,808 |
| 10 | gannet 2.1% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 337.07T 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 21 13:07 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … b4 16. a4 e5 17. O-O Rd8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Kf8 10. Bxh6 Ne8 11. Nc3 Kg7 12. Bb5 Kh8 13. Bd7 b5 14. Qd2 f4 15. Nd5 b4 16. a4 e5 17. O-O Rd8 - Oct 21 13:07 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Rf6 26. hxg5 Kg7 27. Qh6 Kf7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Kf8 10. Bxh6 Ne8 11. Nc3 Kg7 12. Bb5 Kh8 13. Bd7 b5 14. Qd2 f4 15. Nd5 b4 16. a4 e5 17. O-O Rd8 18. g3 Ng7 19. h4 Rf8 20. Ne7 d5 21. Kh1 b3 22. c4 g5 23. Qa5 Nf5 24. Qa6 Nd6 25. dxe5 Rf6 26. hxg5 Kg7 27. Qh6 Kf7 - Oct 21 13:07 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 25. dxe5 Rf6 26. hxg5 Kg7 27. Qh6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Kf8 10. Bxh6 Ne8 11. Nc3 Kg7 12. Bb5 Kh8 13. Bd7 b5 14. Qd2 f4 15. Nd5 b4 16. a4 e5 17. O-O Rd8 18. g3 Ng7 19. h4 Rf8 20. Ne7 d5 21. Kh1 b3 22. c4 g5 23. Qa5 Nf5 24. Qa6 Nd6 25. dxe5 Rf6 26. hxg5 Kg7 27. Qh6 - Oct 21 13:07 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Nd6 25. dxe5 Rf6 26. hxg5 Kg7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Kf8 10. Bxh6 Ne8 11. Nc3 Kg7 12. Bb5 Kh8 13. Bd7 b5 14. Qd2 f4 15. Nd5 b4 16. a4 e5 17. O-O Rd8 18. g3 Ng7 19. h4 Rf8 20. Ne7 d5 21. Kh1 b3 22. c4 g5 23. Qa5 Nf5 24. Qa6 Nd6 25. dxe5 Rf6 26. hxg5 Kg7 - Oct 21 13:07 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 24. Qa6 Nd6 25. dxe5 Rf6 26. hxg5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Kf8 10. Bxh6 Ne8 11. Nc3 Kg7 12. Bb5 Kh8 13. Bd7 b5 14. Qd2 f4 15. Nd5 b4 16. a4 e5 17. O-O Rd8 18. g3 Ng7 19. h4 Rf8 20. Ne7 d5 21. Kh1 b3 22. c4 g5 23. Qa5 Nf5 24. Qa6 Nd6 25. dxe5 Rf6 26. hxg5 - Oct 21 13:07 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Nf5 24. Qa6 Nd6 25. dxe5 Rf6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Kf8 10. Bxh6 Ne8 11. Nc3 Kg7 12. Bb5 Kh8 13. Bd7 b5 14. Qd2 f4 15. Nd5 b4 16. a4 e5 17. O-O Rd8 18. g3 Ng7 19. h4 Rf8 20. Ne7 d5 21. Kh1 b3 22. c4 g5 23. Qa5 Nf5 24. Qa6 Nd6 25. dxe5 Rf6 - Oct 21 13:07 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 23. Qa5 Nf5 24. Qa6 Nd6 25. dxe5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Kf8 10. Bxh6 Ne8 11. Nc3 Kg7 12. Bb5 Kh8 13. Bd7 b5 14. Qd2 f4 15. Nd5 b4 16. a4 e5 17. O-O Rd8 18. g3 Ng7 19. h4 Rf8 20. Ne7 d5 21. Kh1 b3 22. c4 g5 23. Qa5 Nf5 24. Qa6 Nd6 25. dxe5 - Oct 21 13:07 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … g5 23. Qa5 Nf5 24. Qa6 Nd6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Kf8 10. Bxh6 Ne8 11. Nc3 Kg7 12. Bb5 Kh8 13. Bd7 b5 14. Qd2 f4 15. Nd5 b4 16. a4 e5 17. O-O Rd8 18. g3 Ng7 19. h4 Rf8 20. Ne7 d5 21. Kh1 b3 22. c4 g5 23. Qa5 Nf5 24. Qa6 Nd6 - Oct 21 13:07 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 22. c4 g5 23. Qa5 Nf5 24. Qa6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Kf8 10. Bxh6 Ne8 11. Nc3 Kg7 12. Bb5 Kh8 13. Bd7 b5 14. Qd2 f4 15. Nd5 b4 16. a4 e5 17. O-O Rd8 18. g3 Ng7 19. h4 Rf8 20. Ne7 d5 21. Kh1 b3 22. c4 g5 23. Qa5 Nf5 24. Qa6 - Oct 21 13:07 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … b3 22. c4 g5 23. Qa5 Nf5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Kf8 10. Bxh6 Ne8 11. Nc3 Kg7 12. Bb5 Kh8 13. Bd7 b5 14. Qd2 f4 15. Nd5 b4 16. a4 e5 17. O-O Rd8 18. g3 Ng7 19. h4 Rf8 20. Ne7 d5 21. Kh1 b3 22. c4 g5 23. Qa5 Nf5 - Oct 21 13:07 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 21. Kh1 b3 22. c4 g5 23. Qa5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Kf8 10. Bxh6 Ne8 11. Nc3 Kg7 12. Bb5 Kh8 13. Bd7 b5 14. Qd2 f4 15. Nd5 b4 16. a4 e5 17. O-O Rd8 18. g3 Ng7 19. h4 Rf8 20. Ne7 d5 21. Kh1 b3 22. c4 g5 23. Qa5 - Oct 21 13:07 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … d5 21. Kh1 b3 22. c4 g5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Kf8 10. Bxh6 Ne8 11. Nc3 Kg7 12. Bb5 Kh8 13. Bd7 b5 14. Qd2 f4 15. Nd5 b4 16. a4 e5 17. O-O Rd8 18. g3 Ng7 19. h4 Rf8 20. Ne7 d5 21. Kh1 b3 22. c4 g5