88.6M
positions
16.9M
practically solved
326.81T
engine nodes
2.5M
analyses
94
in queue
14
active workers
64
active cores
6.7M
nodes / sec
32.7
positions / min
143
proof number
4,659
disproof number
Root conquest: 0/20 first moves solved · 19.1% of tree positions solved · last 24h: 370,774 closures, 6.61T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 70 over 204 open obligations, of which 37 (18.1%) 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 2.2m (median of 124) · measured at 2026-10-19 17:00 UTC
Closures by source, last 24h (370774 of 370774 labelled): USER 98.8% (366273) · FILL 0.3% (1038) · AUTO 0.3% (1002) · SOLVE 0.0% (0) · NONE 0.7% (2461) · last 7d (1031522 of 1031522): USER 92.5% (953769) · FILL 0.7% (7648) · AUTO 6.5% (67149) · SOLVE 0.0% (0) · NONE 0.3% (2956). 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 … Rb8 15. e5 b5 16. Bc8 Rb7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Rb8 15. e5 b5 16. Bc8 Nd7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 d6 2. Ng5 f5 … Rb8 15. e5 b5 16. Bc8 Ne8 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. d4 d5 2. Nc3 Bg4 … Kg7 25. Be6 Ra8 26. Bc8 b5 (User) · 128.0M nodes · MoNiKaMaDnEsS-DESKTOP-VG9VPVH-atomicdb
- 1. Nf3 f6 2. e4 e6 … Nd3 21. Rad1 Nf2 22. Ra1 Bb4 (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 | 1199 | 2 | |
| g1h3 | unsolved | 821 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 401 | 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 65.4% of the fleet | 4.32T | 30,913 |
| 2 | BManBJ 24.5% of the fleet | 1.62T | 12,030 |
| 3 | RickEdinson 6.6% of the fleet | 433.28B | 2,740 |
| 4 | MoNiKaMaDnEsS 3.5% of the fleet | 228.62B | 1,740 |
| 5 | soothdest 0.1% of the fleet | 6.59B | 46 |
5 accounts · 6.61T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 27.6% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 17.5% of the fleet | 57.13T | 402,538 |
| 3 | tenzink 13.1% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 9.6% of the fleet | 31.40T | 228,002 |
| 5 | Torom 7.2% of the fleet | 23.40T | 166,782 |
| 6 | randomchampgamer 6.1% of the fleet | 19.85T | 140,897 |
| 7 | RickEdinson 4.7% of the fleet | 15.43T | 102,943 |
| 8 | JackIV 3.1% of the fleet | 10.06T | 67,859 |
| 9 | MoNiKaMaDnEsS 2.7% of the fleet | 8.77T | 60,399 |
| 10 | gannet 2.2% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 327.04T 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 19 18:00 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … Kg7 16. Be8 h4 17. c4 f4
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 Rc8 10. Nc3 Kf8 11. Bb5 Kg8 12. Bxh6 Rf8 13. f3 Nd7 14. e5 Nb6 15. Ne2 Kg7 16. Be8 h4 17. c4 f4 - Oct 19 18:00 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … g5 23. Qc2 dxe5 24. Qh7 Kf8
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 Rc8 10. Nc3 Kf8 11. Bb5 Kg8 12. Bxh6 Rf8 13. f3 Nd7 14. e5 Nb6 15. Ne2 Kg7 16. Be8 h4 17. c4 f4 18. Nxf4 Kh8 19. Qd2 Rf4 20. g3 Nd5 21. cxd5 Kg8 22. gxf4 g5 23. Qc2 dxe5 24. Qh7 Kf8 - Oct 19 18:00 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 22. gxf4 g5 23. Qc2 dxe5 24. Qh7
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 Rc8 10. Nc3 Kf8 11. Bb5 Kg8 12. Bxh6 Rf8 13. f3 Nd7 14. e5 Nb6 15. Ne2 Kg7 16. Be8 h4 17. c4 f4 18. Nxf4 Kh8 19. Qd2 Rf4 20. g3 Nd5 21. cxd5 Kg8 22. gxf4 g5 23. Qc2 dxe5 24. Qh7 - Oct 19 18:00 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Kg8 22. gxf4 g5 23. Qc2 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 Rc8 10. Nc3 Kf8 11. Bb5 Kg8 12. Bxh6 Rf8 13. f3 Nd7 14. e5 Nb6 15. Ne2 Kg7 16. Be8 h4 17. c4 f4 18. Nxf4 Kh8 19. Qd2 Rf4 20. g3 Nd5 21. cxd5 Kg8 22. gxf4 g5 23. Qc2 dxe5 - Oct 19 18:00 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 21. cxd5 Kg8 22. gxf4 g5 23. Qc2
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 Rc8 10. Nc3 Kf8 11. Bb5 Kg8 12. Bxh6 Rf8 13. f3 Nd7 14. e5 Nb6 15. Ne2 Kg7 16. Be8 h4 17. c4 f4 18. Nxf4 Kh8 19. Qd2 Rf4 20. g3 Nd5 21. cxd5 Kg8 22. gxf4 g5 23. Qc2 - Oct 19 18:00 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Nd5 21. cxd5 Kg8 22. gxf4 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 Rc8 10. Nc3 Kf8 11. Bb5 Kg8 12. Bxh6 Rf8 13. f3 Nd7 14. e5 Nb6 15. Ne2 Kg7 16. Be8 h4 17. c4 f4 18. Nxf4 Kh8 19. Qd2 Rf4 20. g3 Nd5 21. cxd5 Kg8 22. gxf4 g5 - Oct 19 18:00 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 20. g3 Nd5 21. cxd5 Kg8 22. gxf4
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 Rc8 10. Nc3 Kf8 11. Bb5 Kg8 12. Bxh6 Rf8 13. f3 Nd7 14. e5 Nb6 15. Ne2 Kg7 16. Be8 h4 17. c4 f4 18. Nxf4 Kh8 19. Qd2 Rf4 20. g3 Nd5 21. cxd5 Kg8 22. gxf4 - Oct 19 18:00 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Rf4 20. g3 Nd5 21. cxd5 Kg8
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 Rc8 10. Nc3 Kf8 11. Bb5 Kg8 12. Bxh6 Rf8 13. f3 Nd7 14. e5 Nb6 15. Ne2 Kg7 16. Be8 h4 17. c4 f4 18. Nxf4 Kh8 19. Qd2 Rf4 20. g3 Nd5 21. cxd5 Kg8 - Oct 19 18:00 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 19. Qd2 Rf4 20. g3 Nd5 21. cxd5
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 Rc8 10. Nc3 Kf8 11. Bb5 Kg8 12. Bxh6 Rf8 13. f3 Nd7 14. e5 Nb6 15. Ne2 Kg7 16. Be8 h4 17. c4 f4 18. Nxf4 Kh8 19. Qd2 Rf4 20. g3 Nd5 21. cxd5 - Oct 19 18:00 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Kh8 19. Qd2 Rf4 20. g3 Nd5
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 Rc8 10. Nc3 Kf8 11. Bb5 Kg8 12. Bxh6 Rf8 13. f3 Nd7 14. e5 Nb6 15. Ne2 Kg7 16. Be8 h4 17. c4 f4 18. Nxf4 Kh8 19. Qd2 Rf4 20. g3 Nd5 - Oct 19 18:00 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 18. Nxf4 Kh8 19. Qd2 Rf4 20. g3
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 Rc8 10. Nc3 Kf8 11. Bb5 Kg8 12. Bxh6 Rf8 13. f3 Nd7 14. e5 Nb6 15. Ne2 Kg7 16. Be8 h4 17. c4 f4 18. Nxf4 Kh8 19. Qd2 Rf4 20. g3 - Oct 19 18:00 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … f4 18. Nxf4 Kh8 19. Qd2 Rf4
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 Rc8 10. Nc3 Kf8 11. Bb5 Kg8 12. Bxh6 Rf8 13. f3 Nd7 14. e5 Nb6 15. Ne2 Kg7 16. Be8 h4 17. c4 f4 18. Nxf4 Kh8 19. Qd2 Rf4