89.0M
positions
17.1M
practically solved
328.01T
engine nodes
2.5M
analyses
310
in queue
6
active workers
32
active cores
0
nodes / sec
15.3
positions / min
143
proof number
4,658
disproof number
Root conquest: 0/20 first moves solved · 19.2% of tree positions solved · last 24h: 370,138 closures, 4.66T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 70 over 201 open obligations, of which 37 (18.4%) 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 1.8m (median of 107) · measured at 2026-10-20 04:00 UTC
Closures by source, last 24h (370074 of 370125 labelled): USER 98.9% (366095) · FILL 0.1% (533) · AUTO 0.3% (1002) · SOLVE 0.0% (0) · NONE 0.7% (2444) · last 7d (1158381 of 1158394): USER 93.3% (1080638) · FILL 0.7% (7648) · AUTO 5.8% (67149) · SOLVE 0.0% (0) · NONE 0.3% (2946). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- deep line, ply ≥23 · … Rd8 Nd2 a5 c4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- deep line, ply ≥23 · … Rd8 Nd2 Kg7 c4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- deep line, ply ≥23 · … Rd8 Nd2 Rb8 c4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- deep line, ply ≥21 · … a6 Bd7 a5 Nc3 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 Nh6 … dxe4 10. gxh6 g5 11. Re1 a6 (User) · 128.0M nodes · MoNiKaMaDnEsS-DESKTOP-VG9VPVH-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 | 1158 | 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 51.7% of the fleet | 2.41T | 17,214 |
| 2 | BManBJ 35.6% of the fleet | 1.66T | 12,417 |
| 3 | RickEdinson 8.8% of the fleet | 410.16B | 2,508 |
| 4 | MoNiKaMaDnEsS 3.9% of the fleet | 181.95B | 1,380 |
4 accounts · 4.66T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 27.5% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 17.7% of the fleet | 57.92T | 408,470 |
| 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 | 23.48T | 167,251 |
| 6 | randomchampgamer 6.0% of the fleet | 19.85T | 140,897 |
| 7 | RickEdinson 4.8% of the fleet | 15.61T | 104,025 |
| 8 | JackIV 3.1% of the fleet | 10.06T | 67,859 |
| 9 | MoNiKaMaDnEsS 2.7% of the fleet | 8.78T | 60,481 |
| 10 | gannet 2.2% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 328.09T 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 20 04:48 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … Rd8 15. Qd2 g5 16. e5 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 Nh7 13. Qe2 Kh8 14. Bd7 Rd8 15. Qd2 g5 16. e5 f4 - Oct 20 04:48 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … d5 22. Qf5 g4 23. Qh5 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 Rc8 10. Nc3 Kf8 11. Bb5 Kg8 12. Bxh6 Nh7 13. Qe2 Kh8 14. Bd7 Rd8 15. Qd2 g5 16. e5 f4 17. Ne4 Rg8 18. Qd3 Nf8 19. Nf6 Rg6 20. Nxh5 Ng6 21. e6 d5 22. Qf5 g4 23. Qh5 Kg7 - Oct 20 04:48 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 21. e6 d5 22. Qf5 g4 23. Qh5
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 Nh7 13. Qe2 Kh8 14. Bd7 Rd8 15. Qd2 g5 16. e5 f4 17. Ne4 Rg8 18. Qd3 Nf8 19. Nf6 Rg6 20. Nxh5 Ng6 21. e6 d5 22. Qf5 g4 23. Qh5 - Oct 20 04:48 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Ng6 21. e6 d5 22. Qf5 g4
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 Nh7 13. Qe2 Kh8 14. Bd7 Rd8 15. Qd2 g5 16. e5 f4 17. Ne4 Rg8 18. Qd3 Nf8 19. Nf6 Rg6 20. Nxh5 Ng6 21. e6 d5 22. Qf5 g4 - Oct 20 04:48 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 20. Nxh5 Ng6 21. e6 d5 22. Qf5
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 Nh7 13. Qe2 Kh8 14. Bd7 Rd8 15. Qd2 g5 16. e5 f4 17. Ne4 Rg8 18. Qd3 Nf8 19. Nf6 Rg6 20. Nxh5 Ng6 21. e6 d5 22. Qf5 - Oct 20 04:48 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Rg6 20. Nxh5 Ng6 21. e6 d5
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 Nh7 13. Qe2 Kh8 14. Bd7 Rd8 15. Qd2 g5 16. e5 f4 17. Ne4 Rg8 18. Qd3 Nf8 19. Nf6 Rg6 20. Nxh5 Ng6 21. e6 d5 - Oct 20 04:48 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 19. Nf6 Rg6 20. Nxh5 Ng6 21. e6
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 Nh7 13. Qe2 Kh8 14. Bd7 Rd8 15. Qd2 g5 16. e5 f4 17. Ne4 Rg8 18. Qd3 Nf8 19. Nf6 Rg6 20. Nxh5 Ng6 21. e6 - Oct 20 04:48 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Nf8 19. Nf6 Rg6 20. Nxh5 Ng6
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 Nh7 13. Qe2 Kh8 14. Bd7 Rd8 15. Qd2 g5 16. e5 f4 17. Ne4 Rg8 18. Qd3 Nf8 19. Nf6 Rg6 20. Nxh5 Ng6 - Oct 20 04:48 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 18. Qd3 Nf8 19. Nf6 Rg6 20. Nxh5
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 Nh7 13. Qe2 Kh8 14. Bd7 Rd8 15. Qd2 g5 16. e5 f4 17. Ne4 Rg8 18. Qd3 Nf8 19. Nf6 Rg6 20. Nxh5 - Oct 20 04:48 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Rg8 18. Qd3 Nf8 19. Nf6 Rg6
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 Nh7 13. Qe2 Kh8 14. Bd7 Rd8 15. Qd2 g5 16. e5 f4 17. Ne4 Rg8 18. Qd3 Nf8 19. Nf6 Rg6 - Oct 20 04:48 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 17. Ne4 Rg8 18. Qd3 Nf8 19. Nf6
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 Nh7 13. Qe2 Kh8 14. Bd7 Rd8 15. Qd2 g5 16. e5 f4 17. Ne4 Rg8 18. Qd3 Nf8 19. Nf6 - Oct 20 04:48 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … f4 17. Ne4 Rg8 18. Qd3 Nf8
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 Nh7 13. Qe2 Kh8 14. Bd7 Rd8 15. Qd2 g5 16. e5 f4 17. Ne4 Rg8 18. Qd3 Nf8