67.6M
positions
12.1M
practically solved
243.55T
engine nodes
1.9M
analyses
7,892
in queue
18
active workers
128
active cores
23.1M
nodes / sec
35.2
positions / min
57
proof number
3,815
disproof number
Root conquest: 0/20 first moves solved · 18.0% of tree positions solved · last 24h: 321,538 closures, 6.57T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 81 over 199 open obligations, of which 32 (16.1%) 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 5.4m (median of 121) · measured at 2026-09-29 20:00 UTC
Closures by source, last 24h (321367 of 321367 labelled): USER 99.9% (321021) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.1% (346) · last 7d (1851245 of 1851332): USER 97.7% (1807822) · FILL 0.5% (8795) · AUTO 1.7% (32065) · SOLVE 0.0% (0) · NONE 0.1% (2563). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nh3 f6 2. Nc3 h6 … e5 13. Bb2 Kh7 14. Bd3 f5 (User) · 128.0M nodes · auranvesdranor-admin-835912-atomicdb
- 1. Nh3 f6 2. Nc3 h6 … Kh7 13. Bb2 e5 14. c4 Bc5 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Kf8 19. g3 Nd6 20. Bxd5 Kg7 (User) · 512.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … f4 11. h3 a6 12. c4 e6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … f4 11. h3 a6 12. c4 a5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
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 | 1050 | 2 | |
| g1h3 | unsolved | 760 | 2 | |
| e2e3 | unsolved | 439 | 3 | |
| d2d4 | unsolved | 392 | 2 | |
| e2e4 | unsolved | 363 | 2 | |
| b1c3 | unsolved | 142 | 2 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b2b4 | unsolved | 0 | 3 | |
| b1a3 | unsolved | 0 | 3 | |
| h2h3 | unsolved | -98 | 2 | |
| a2a3 | unsolved | -103 | 2 | |
| d2d3 | unsolved | -116 | 2 | |
| f2f3 | unsolved | -117 | 3 | |
| b2b3 | unsolved | -119 | 1 | |
| f2f4 | unsolved | -299 | 3 | |
| h2h4 | unsolved | -497 | 2 | |
| a2a4 | unsolved | -510 | 2 | |
| g2g4 | unsolved | -600 | 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 | gannet 35.7% of the fleet | 2.35T | 11,349 |
| 2 | BManBJ 21.4% of the fleet | 1.41T | 10,565 |
| 3 | auranvesdranor 15.4% of the fleet | 1.01T | 7,728 |
| 4 | randomchampgamer 8.8% of the fleet | 577.34B | 4,652 |
| 5 | tenzink 8.4% of the fleet | 549.45B | 3,819 |
| 6 | RickEdinson 5.3% of the fleet | 349.20B | 2,271 |
| 7 | MoNiKaMaDnEsS 4.2% of the fleet | 278.53B | 2,074 |
| 8 | rhaxier 0.8% of the fleet | 49.81B | 346 |
| 9 | soothdest <0.1% of the fleet | 1.31B | 21 |
9 accounts · 6.57T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 37.1% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.4% of the fleet | 37.45T | 312,108 |
| 3 | BManBJ 12.1% of the fleet | 29.47T | 204,254 |
| 4 | auranvesdranor 11.6% of the fleet | 28.27T | 204,120 |
| 5 | randomchampgamer 4.2% of the fleet | 10.29T | 75,663 |
| 6 | JackIV 4.1% of the fleet | 10.06T | 67,859 |
| 7 | RickEdinson 2.8% of the fleet | 6.84T | 45,341 |
| 8 | MoNiKaMaDnEsS 1.8% of the fleet | 4.42T | 28,639 |
| 9 | NeoArcturus 1.7% of the fleet | 4.09T | 16,758 |
| 10 | ijh 1.5% of the fleet | 3.57T | 37,348 |
and 25 more.
35 accounts · 243.67T 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 · 16 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
- Refuting 1... d61. Nf3 d6 2. Nc3proposed by randomchampgamer · 3 votes
- The weaker of the two f-pawn advances for 1. ...d61. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4proposed by MoNiKaMaDnEsS · 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
- Is Nh3 h6 e3 e6 Nc3 a draw?1. Nh3 e6 2. e3 h6 3. Nc3proposed by soothdest · 3 votes
Showing the 6 most voted of 21 proposals · see every proposal
Milestones
- Sep 29 20:39 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … Kf8 19. g3 Nd6 20. Bxd5 Rc4
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 f4 11. h3 Rc8 12. Nc3 a6 13. e5 Kg8 14. Ne4 Ne8 15. Bc4 Kh8 16. Ng5 d5 17. Nf7 Kg7 18. c3 Kf8 19. g3 Nd6 20. Bxd5 Rc4 - Sep 29 20:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … g3 24. fxg3 e6 25. Qh8 Ke7
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 f4 11. h3 Rc8 12. Nc3 a6 13. e5 Kg8 14. Ne4 Ne8 15. Bc4 Kh8 16. Ng5 d5 17. Nf7 Kg7 18. c3 Kf8 19. g3 Nd6 20. Bxd5 Rc4 21. gxf4 g5 22. Qb1 g4 23. Qh7 g3 24. fxg3 e6 25. Qh8 Ke7 - Sep 29 20:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 23. Qh7 g3 24. fxg3 e6 25. Qh8
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 f4 11. h3 Rc8 12. Nc3 a6 13. e5 Kg8 14. Ne4 Ne8 15. Bc4 Kh8 16. Ng5 d5 17. Nf7 Kg7 18. c3 Kf8 19. g3 Nd6 20. Bxd5 Rc4 21. gxf4 g5 22. Qb1 g4 23. Qh7 g3 24. fxg3 e6 25. Qh8 - Sep 29 20:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … g4 23. Qh7 g3 24. fxg3 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 Kf8 10. Bxh6 f4 11. h3 Rc8 12. Nc3 a6 13. e5 Kg8 14. Ne4 Ne8 15. Bc4 Kh8 16. Ng5 d5 17. Nf7 Kg7 18. c3 Kf8 19. g3 Nd6 20. Bxd5 Rc4 21. gxf4 g5 22. Qb1 g4 23. Qh7 g3 24. fxg3 e6 - Sep 29 20:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 22. Qb1 g4 23. Qh7 g3 24. fxg3
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 f4 11. h3 Rc8 12. Nc3 a6 13. e5 Kg8 14. Ne4 Ne8 15. Bc4 Kh8 16. Ng5 d5 17. Nf7 Kg7 18. c3 Kf8 19. g3 Nd6 20. Bxd5 Rc4 21. gxf4 g5 22. Qb1 g4 23. Qh7 g3 24. fxg3 - Sep 29 20:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … g5 22. Qb1 g4 23. Qh7 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 Kf8 10. Bxh6 f4 11. h3 Rc8 12. Nc3 a6 13. e5 Kg8 14. Ne4 Ne8 15. Bc4 Kh8 16. Ng5 d5 17. Nf7 Kg7 18. c3 Kf8 19. g3 Nd6 20. Bxd5 Rc4 21. gxf4 g5 22. Qb1 g4 23. Qh7 g3 - Sep 29 20:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 21. gxf4 g5 22. Qb1 g4 23. 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 Kf8 10. Bxh6 f4 11. h3 Rc8 12. Nc3 a6 13. e5 Kg8 14. Ne4 Ne8 15. Bc4 Kh8 16. Ng5 d5 17. Nf7 Kg7 18. c3 Kf8 19. g3 Nd6 20. Bxd5 Rc4 21. gxf4 g5 22. Qb1 g4 23. Qh7 - Sep 29 20:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Rc4 21. gxf4 g5 22. Qb1 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 Kf8 10. Bxh6 f4 11. h3 Rc8 12. Nc3 a6 13. e5 Kg8 14. Ne4 Ne8 15. Bc4 Kh8 16. Ng5 d5 17. Nf7 Kg7 18. c3 Kf8 19. g3 Nd6 20. Bxd5 Rc4 21. gxf4 g5 22. Qb1 g4 - Sep 29 20:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 20. Bxd5 Rc4 21. gxf4 g5 22. Qb1
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 f4 11. h3 Rc8 12. Nc3 a6 13. e5 Kg8 14. Ne4 Ne8 15. Bc4 Kh8 16. Ng5 d5 17. Nf7 Kg7 18. c3 Kf8 19. g3 Nd6 20. Bxd5 Rc4 21. gxf4 g5 22. Qb1 - Sep 29 20:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Nd6 20. Bxd5 Rc4 21. 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 Kf8 10. Bxh6 f4 11. h3 Rc8 12. Nc3 a6 13. e5 Kg8 14. Ne4 Ne8 15. Bc4 Kh8 16. Ng5 d5 17. Nf7 Kg7 18. c3 Kf8 19. g3 Nd6 20. Bxd5 Rc4 21. gxf4 g5 - Sep 29 20:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 19. g3 Nd6 20. Bxd5 Rc4 21. 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 Kf8 10. Bxh6 f4 11. h3 Rc8 12. Nc3 a6 13. e5 Kg8 14. Ne4 Ne8 15. Bc4 Kh8 16. Ng5 d5 17. Nf7 Kg7 18. c3 Kf8 19. g3 Nd6 20. Bxd5 Rc4 21. gxf4 - Sep 29 20:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … g5 24. Qf8 Kc7 25. Qc8 Kb6
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 f4 11. h3 Rc8 12. Nc3 a6 13. e5 Kg8 14. Ne4 Ne8 15. Bc4 Kh8 16. Ng5 d5 17. Nf7 Kg7 18. c3 Kf8 19. g3 Nd6 20. Bxd5 Rc4 21. Nh8 Ke8 22. gxf4 Kd8 23. Qf3 g5 24. Qf8 Kc7 25. Qc8 Kb6