83.6M
positions
16.0M
practically solved
307.37T
engine nodes
2.3M
analyses
128
in queue
2
active workers
12
active cores
0
nodes / sec
6.6
positions / min
85
proof number
4,551
disproof number
Root conquest: 0/20 first moves solved · 19.1% of tree positions solved · last 24h: 107,117 closures, 3.35T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 70 over 216 open obligations, of which 41 (19.0%) 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 3.8h (median of 7) · measured at 2026-10-14 08:00 UTC
Closures by source, last 24h (107066 of 107066 labelled): USER 99.5% (106535) · FILL 0.4% (390) · AUTO 0.0% (16) · SOLVE 0.0% (0) · NONE 0.1% (125) · last 7d (1212034 of 1212085): USER 97.3% (1178990) · FILL 0.3% (3077) · AUTO 2.4% (29472) · SOLVE 0.0% (0) · NONE 0.0% (495). 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 … h6 12. f4 Bb4 13. Bxf6 Ke7 (User) · 128.0M nodes · MoNiKaMaDnEsS-DESKTOP-VG9VPVH-atomicdb
- 1. Nf3 f6 2. Nc3 Nh6 … 18. Bxb7 Kg8 19. Rxe1 g6 20. c3 (User) · 128.0M nodes · randomchampgamer-2026PC-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 | 1134 | 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 35.3% of the fleet | 1.18T | 5,994 |
| 2 | Torom 24.0% of the fleet | 804.57B | 4,942 |
| 3 | randomchampgamer 18.8% of the fleet | 630.69B | 2,562 |
| 4 | RickEdinson 11.5% of the fleet | 384.59B | 2,152 |
| 5 | MoNiKaMaDnEsS 10.3% of the fleet | 345.25B | 1,877 |
5 accounts · 3.35T 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 16.2% 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 | 18.89T | 133,972 |
| 6 | Torom 5.1% of the fleet | 15.70T | 113,354 |
| 7 | RickEdinson 4.2% of the fleet | 13.02T | 85,770 |
| 8 | JackIV 3.3% of the fleet | 10.06T | 67,859 |
| 9 | MoNiKaMaDnEsS 2.4% of the fleet | 7.45T | 50,031 |
| 10 | gannet 2.4% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 307.42T 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 08:49 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … h6 12. f4 Bb4 13. Bxf6 Rf8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 e5 7. d4 e4 8. Nd8 g6 9. Nxb7 Nf6 10. Bg5 d5 11. Nc3 h6 12. f4 Bb4 13. Bxf6 Rf8 - Oct 14 08:49 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Ke8 20. Re7 Kd8 21. Re8 Kc7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 e5 7. d4 e4 8. Nd8 g6 9. Nxb7 Nf6 10. Bg5 d5 11. Nc3 h6 12. f4 Bb4 13. Bxf6 Rf8 14. Qg4 Rf5 15. Qh4 Rg5 16. f5 Be7 17. fxg6 Bxh4 18. O-O Ke7 19. Rf7 Ke8 20. Re7 Kd8 21. Re8 Kc7 - Oct 14 08:49 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 19. Rf7 Ke8 20. Re7 Kd8 21. Re8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 e5 7. d4 e4 8. Nd8 g6 9. Nxb7 Nf6 10. Bg5 d5 11. Nc3 h6 12. f4 Bb4 13. Bxf6 Rf8 14. Qg4 Rf5 15. Qh4 Rg5 16. f5 Be7 17. fxg6 Bxh4 18. O-O Ke7 19. Rf7 Ke8 20. Re7 Kd8 21. Re8 - Oct 14 08:49 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Ke7 19. Rf7 Ke8 20. Re7 Kd8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 e5 7. d4 e4 8. Nd8 g6 9. Nxb7 Nf6 10. Bg5 d5 11. Nc3 h6 12. f4 Bb4 13. Bxf6 Rf8 14. Qg4 Rf5 15. Qh4 Rg5 16. f5 Be7 17. fxg6 Bxh4 18. O-O Ke7 19. Rf7 Ke8 20. Re7 Kd8 - Oct 14 08:49 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 18. O-O Ke7 19. Rf7 Ke8 20. Re7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 e5 7. d4 e4 8. Nd8 g6 9. Nxb7 Nf6 10. Bg5 d5 11. Nc3 h6 12. f4 Bb4 13. Bxf6 Rf8 14. Qg4 Rf5 15. Qh4 Rg5 16. f5 Be7 17. fxg6 Bxh4 18. O-O Ke7 19. Rf7 Ke8 20. Re7 - Oct 14 08:49 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Bxh4 18. O-O Ke7 19. Rf7 Ke8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 e5 7. d4 e4 8. Nd8 g6 9. Nxb7 Nf6 10. Bg5 d5 11. Nc3 h6 12. f4 Bb4 13. Bxf6 Rf8 14. Qg4 Rf5 15. Qh4 Rg5 16. f5 Be7 17. fxg6 Bxh4 18. O-O Ke7 19. Rf7 Ke8 - Oct 14 08:49 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 17. fxg6 Bxh4 18. O-O Ke7 19. Rf7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 e5 7. d4 e4 8. Nd8 g6 9. Nxb7 Nf6 10. Bg5 d5 11. Nc3 h6 12. f4 Bb4 13. Bxf6 Rf8 14. Qg4 Rf5 15. Qh4 Rg5 16. f5 Be7 17. fxg6 Bxh4 18. O-O Ke7 19. Rf7 - Oct 14 08:49 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Be7 17. fxg6 Bxh4 18. O-O Ke7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 e5 7. d4 e4 8. Nd8 g6 9. Nxb7 Nf6 10. Bg5 d5 11. Nc3 h6 12. f4 Bb4 13. Bxf6 Rf8 14. Qg4 Rf5 15. Qh4 Rg5 16. f5 Be7 17. fxg6 Bxh4 18. O-O Ke7 - Oct 14 08:49 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 16. f5 Be7 17. fxg6 Bxh4 18. O-O
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 e5 7. d4 e4 8. Nd8 g6 9. Nxb7 Nf6 10. Bg5 d5 11. Nc3 h6 12. f4 Bb4 13. Bxf6 Rf8 14. Qg4 Rf5 15. Qh4 Rg5 16. f5 Be7 17. fxg6 Bxh4 18. O-O - Oct 14 08:49 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Rg5 16. f5 Be7 17. fxg6 Bxh4
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 e5 7. d4 e4 8. Nd8 g6 9. Nxb7 Nf6 10. Bg5 d5 11. Nc3 h6 12. f4 Bb4 13. Bxf6 Rf8 14. Qg4 Rf5 15. Qh4 Rg5 16. f5 Be7 17. fxg6 Bxh4 - Oct 14 08:49 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 15. Qh4 Rg5 16. f5 Be7 17. fxg6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 e5 7. d4 e4 8. Nd8 g6 9. Nxb7 Nf6 10. Bg5 d5 11. Nc3 h6 12. f4 Bb4 13. Bxf6 Rf8 14. Qg4 Rf5 15. Qh4 Rg5 16. f5 Be7 17. fxg6 - Oct 14 08:49 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Rf5 15. Qh4 Rg5 16. f5 Be7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 e5 7. d4 e4 8. Nd8 g6 9. Nxb7 Nf6 10. Bg5 d5 11. Nc3 h6 12. f4 Bb4 13. Bxf6 Rf8 14. Qg4 Rf5 15. Qh4 Rg5 16. f5 Be7