89.1M
positions
17.1M
practically solved
328.24T
engine nodes
2.5M
analyses
253
in queue
6
active workers
32
active cores
7.0M
nodes / sec
14.3
positions / min
143
proof number
4,658
disproof number
Root conquest: 0/20 first moves solved · 19.2% of tree positions solved · last 24h: 391,996 closures, 4.25T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 70 over 202 open obligations, of which 37 (18.3%) 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 56) · measured at 2026-10-20 06:00 UTC
Closures by source, last 24h (391918 of 391996 labelled): USER 99.0% (387937) · FILL 0.1% (533) · AUTO 0.3% (1002) · SOLVE 0.0% (0) · NONE 0.6% (2446) · last 7d (1189758 of 1189758): USER 93.5% (1112013) · FILL 0.6% (7648) · AUTO 5.6% (67149) · SOLVE 0.0% (0) · NONE 0.2% (2948). 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 ≥30 · … Bd7 b5 Bxc8 Nh7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- deep line, ply ≥30 · … Bd7 b5 Bxc8 Ng8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- deep line, ply ≥30 · … Bd7 b5 Bxc8 Kg7 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … g6 11. Nc3 Bh6 12. g5 a5 (User) · 128.0M nodes · MoNiKaMaDnEsS-DESKTOP-VG9VPVH-atomicdb
- 1. Nf3 f6 2. e4 e6 … Ba6 17. Bxa6 Kc7 18. h5 Rc8 (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 | 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 47.0% of the fleet | 2.00T | 14,058 |
| 2 | BManBJ 39.4% of the fleet | 1.67T | 12,575 |
| 3 | RickEdinson 9.6% of the fleet | 407.91B | 2,475 |
| 4 | MoNiKaMaDnEsS 4.0% of the fleet | 171.16B | 1,304 |
4 accounts · 4.25T 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 | 58.06T | 409,604 |
| 3 | tenzink 13.0% 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 | 15.64T | 104,265 |
| 8 | JackIV 3.1% of the fleet | 10.06T | 67,859 |
| 9 | MoNiKaMaDnEsS 2.7% of the fleet | 8.82T | 60,756 |
| 10 | gannet 2.2% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 328.31T 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 06:40 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … e6 11. Nc3 Bh6 12. g5 b6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 Be4 9. f3 g6 10. fxe4 e6 11. Nc3 Bh6 12. g5 b6 - Oct 20 06:40 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Kg7 22. Rg8 Kh7 23. Rg7 Kh8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 Be4 9. f3 g6 10. fxe4 e6 11. Nc3 Bh6 12. g5 b6 13. Nd8 O-O 14. Qf3 Nbd7 15. Bxc6 d5 16. h4 Bg7 17. gxf6 Rf4 18. Qxf4 h5 19. Rf1 g5 20. Rf8 Kh7 21. Rh8 Kg7 22. Rg8 Kh7 23. Rg7 Kh8 - Oct 20 06:40 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 21. Rh8 Kg7 22. Rg8 Kh7 23. Rg7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 Be4 9. f3 g6 10. fxe4 e6 11. Nc3 Bh6 12. g5 b6 13. Nd8 O-O 14. Qf3 Nbd7 15. Bxc6 d5 16. h4 Bg7 17. gxf6 Rf4 18. Qxf4 h5 19. Rf1 g5 20. Rf8 Kh7 21. Rh8 Kg7 22. Rg8 Kh7 23. Rg7 - Oct 20 06:40 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Kh7 21. Rh8 Kg7 22. Rg8 Kh7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 Be4 9. f3 g6 10. fxe4 e6 11. Nc3 Bh6 12. g5 b6 13. Nd8 O-O 14. Qf3 Nbd7 15. Bxc6 d5 16. h4 Bg7 17. gxf6 Rf4 18. Qxf4 h5 19. Rf1 g5 20. Rf8 Kh7 21. Rh8 Kg7 22. Rg8 Kh7 - Oct 20 06:40 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 20. Rf8 Kh7 21. Rh8 Kg7 22. Rg8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 Be4 9. f3 g6 10. fxe4 e6 11. Nc3 Bh6 12. g5 b6 13. Nd8 O-O 14. Qf3 Nbd7 15. Bxc6 d5 16. h4 Bg7 17. gxf6 Rf4 18. Qxf4 h5 19. Rf1 g5 20. Rf8 Kh7 21. Rh8 Kg7 22. Rg8 - Oct 20 06:40 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … g5 20. Rf8 Kh7 21. Rh8 Kg7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 Be4 9. f3 g6 10. fxe4 e6 11. Nc3 Bh6 12. g5 b6 13. Nd8 O-O 14. Qf3 Nbd7 15. Bxc6 d5 16. h4 Bg7 17. gxf6 Rf4 18. Qxf4 h5 19. Rf1 g5 20. Rf8 Kh7 21. Rh8 Kg7 - Oct 20 06:40 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 19. Rf1 g5 20. Rf8 Kh7 21. Rh8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 Be4 9. f3 g6 10. fxe4 e6 11. Nc3 Bh6 12. g5 b6 13. Nd8 O-O 14. Qf3 Nbd7 15. Bxc6 d5 16. h4 Bg7 17. gxf6 Rf4 18. Qxf4 h5 19. Rf1 g5 20. Rf8 Kh7 21. Rh8 - Oct 20 06:40 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … h5 19. Rf1 g5 20. Rf8 Kh7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 Be4 9. f3 g6 10. fxe4 e6 11. Nc3 Bh6 12. g5 b6 13. Nd8 O-O 14. Qf3 Nbd7 15. Bxc6 d5 16. h4 Bg7 17. gxf6 Rf4 18. Qxf4 h5 19. Rf1 g5 20. Rf8 Kh7 - Oct 20 06:40 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 18. Qxf4 h5 19. Rf1 g5 20. Rf8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 Be4 9. f3 g6 10. fxe4 e6 11. Nc3 Bh6 12. g5 b6 13. Nd8 O-O 14. Qf3 Nbd7 15. Bxc6 d5 16. h4 Bg7 17. gxf6 Rf4 18. Qxf4 h5 19. Rf1 g5 20. Rf8 - Oct 20 06:40 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Rf4 18. Qxf4 h5 19. Rf1 g5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 Be4 9. f3 g6 10. fxe4 e6 11. Nc3 Bh6 12. g5 b6 13. Nd8 O-O 14. Qf3 Nbd7 15. Bxc6 d5 16. h4 Bg7 17. gxf6 Rf4 18. Qxf4 h5 19. Rf1 g5 - Oct 20 06:40 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 17. gxf6 Rf4 18. Qxf4 h5 19. Rf1
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 Be4 9. f3 g6 10. fxe4 e6 11. Nc3 Bh6 12. g5 b6 13. Nd8 O-O 14. Qf3 Nbd7 15. Bxc6 d5 16. h4 Bg7 17. gxf6 Rf4 18. Qxf4 h5 19. Rf1 - Oct 20 06:40 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Bg7 17. gxf6 Rf4 18. Qxf4 h5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 Be4 9. f3 g6 10. fxe4 e6 11. Nc3 Bh6 12. g5 b6 13. Nd8 O-O 14. Qf3 Nbd7 15. Bxc6 d5 16. h4 Bg7 17. gxf6 Rf4 18. Qxf4 h5