82.1M
positions
15.7M
practically solved
299.37T
engine nodes
2.3M
analyses
2,143
in queue
10
active workers
48
active cores
6.9M
nodes / sec
30.7
positions / min
85
proof number
4,552
disproof number
Root conquest: 0/20 first moves solved · 19.2% of tree positions solved · last 24h: 86,537 closures, 3.87T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 70 over 217 open obligations, of which 41 (18.9%) 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 1.6m (median of 1) · measured at 2026-10-12 02:00 UTC
Closures by source, last 24h (86537 of 86537 labelled): USER 79.7% (68948) · FILL 0.7% (625) · AUTO 19.6% (16931) · SOLVE 0.0% (0) · NONE 0.0% (33) · last 7d (1588969 of 1588969): USER 98.0% (1556676) · FILL 0.2% (2696) · AUTO 1.8% (28883) · SOLVE 0.0% (0) · NONE 0.0% (714). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nf3 f6 2. Nc3 c6 … Kh6 21. e6 Bc5 22. f7 Rd8 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 c6 … 15. Nxd8 fxe4 16. O-O Rae8 17. a4 (User) · 128.0M nodes · RickEdinson-MSI-atomicdb
- 1. Nf3 f6 2. e4 e6 … 16. Ba6 Nb4 17. a3 Nxa6 18. h5 (User) · 128.0M nodes · Torom-torsten-pc-atomicdb#0
- 1. Nf3 f6 2. e4 e6 … 13. Kh1 Bd7 14. Be7 Qc8 15. Bxd6 (User) · 128.0M nodes · Torom-torsten-pc-atomicdb#1
- 1. Nf3 f6 2. e4 e6 … a6 7. c3 Bd6 8. Bh6 Nxh6 (User) · 10.00B nodes · Torom-torsten-pc-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 | 1135 | 2 | |
| g1h3 | unsolved | 753 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| e2e4 | unsolved | 400 | 2 | |
| d2d4 | unsolved | 389 | 2 | |
| b1c3 | unsolved | 127 | 2 | |
| b1a3 | unsolved | 0 | 3 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b2b4 | unsolved | -73 | 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 43.1% of the fleet | 1.67T | 13,089 |
| 2 | BManBJ 30.4% of the fleet | 1.18T | 9,979 |
| 3 | randomchampgamer 13.5% of the fleet | 523.25B | 3,726 |
| 4 | RickEdinson 10.1% of the fleet | 390.73B | 3,082 |
| 5 | MoNiKaMaDnEsS 3.0% of the fleet | 114.56B | 1,690 |
5 accounts · 3.87T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 30.1% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 15.7% of the fleet | 47.04T | 327,684 |
| 3 | tenzink 14.3% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.5% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 6.1% of the fleet | 18.16T | 130,741 |
| 6 | Torom 4.3% of the fleet | 13.00T | 95,309 |
| 7 | RickEdinson 4.0% of the fleet | 12.10T | 80,102 |
| 8 | JackIV 3.4% of the fleet | 10.06T | 67,859 |
| 9 | gannet 2.4% of the fleet | 7.24T | 46,848 |
| 10 | MoNiKaMaDnEsS 2.3% of the fleet | 6.80T | 46,031 |
and 25 more.
35 accounts · 299.53T 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 12 02:46 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … Kc7 21. Ra6 Kc8 22. Qg8 Nd8
1. Nf3 f6 2. e4 c6 3. Nc3 g6 4. Nd5 cxd5 5. d4 Nc6 6. Bb5 Qa5 7. c3 Bh6 8. Ng5 Bxg5 9. h4 h5 10. Ba6 b6 11. g4 d6 12. a4 Kf8 13. b4 hxg4 14. h5 Nh6 15. hxg6 Rh2 16. Rxh2 Ke8 17. Bb5 Bg4 18. Qd2 Qxa4 19. Qh6 Kd7 20. Qh7 Kc7 21. Ra6 Kc8 22. Qg8 Nd8 - Oct 12 02:46 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … 20. Qh7 Kc7 21. Ra6 Kc8 22. Qg8
1. Nf3 f6 2. e4 c6 3. Nc3 g6 4. Nd5 cxd5 5. d4 Nc6 6. Bb5 Qa5 7. c3 Bh6 8. Ng5 Bxg5 9. h4 h5 10. Ba6 b6 11. g4 d6 12. a4 Kf8 13. b4 hxg4 14. h5 Nh6 15. hxg6 Rh2 16. Rxh2 Ke8 17. Bb5 Bg4 18. Qd2 Qxa4 19. Qh6 Kd7 20. Qh7 Kc7 21. Ra6 Kc8 22. Qg8 - Oct 12 02:46 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … Kd7 20. Qh7 Kc7 21. Ra6 Kc8
1. Nf3 f6 2. e4 c6 3. Nc3 g6 4. Nd5 cxd5 5. d4 Nc6 6. Bb5 Qa5 7. c3 Bh6 8. Ng5 Bxg5 9. h4 h5 10. Ba6 b6 11. g4 d6 12. a4 Kf8 13. b4 hxg4 14. h5 Nh6 15. hxg6 Rh2 16. Rxh2 Ke8 17. Bb5 Bg4 18. Qd2 Qxa4 19. Qh6 Kd7 20. Qh7 Kc7 21. Ra6 Kc8 - Oct 12 02:46 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … 19. Qh6 Kd7 20. Qh7 Kc7 21. Ra6
1. Nf3 f6 2. e4 c6 3. Nc3 g6 4. Nd5 cxd5 5. d4 Nc6 6. Bb5 Qa5 7. c3 Bh6 8. Ng5 Bxg5 9. h4 h5 10. Ba6 b6 11. g4 d6 12. a4 Kf8 13. b4 hxg4 14. h5 Nh6 15. hxg6 Rh2 16. Rxh2 Ke8 17. Bb5 Bg4 18. Qd2 Qxa4 19. Qh6 Kd7 20. Qh7 Kc7 21. Ra6 - Oct 12 02:46 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … Qxa4 19. Qh6 Kd7 20. Qh7 Kc7
1. Nf3 f6 2. e4 c6 3. Nc3 g6 4. Nd5 cxd5 5. d4 Nc6 6. Bb5 Qa5 7. c3 Bh6 8. Ng5 Bxg5 9. h4 h5 10. Ba6 b6 11. g4 d6 12. a4 Kf8 13. b4 hxg4 14. h5 Nh6 15. hxg6 Rh2 16. Rxh2 Ke8 17. Bb5 Bg4 18. Qd2 Qxa4 19. Qh6 Kd7 20. Qh7 Kc7 - Oct 12 02:46 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … 18. Qd2 Qxa4 19. Qh6 Kd7 20. Qh7
1. Nf3 f6 2. e4 c6 3. Nc3 g6 4. Nd5 cxd5 5. d4 Nc6 6. Bb5 Qa5 7. c3 Bh6 8. Ng5 Bxg5 9. h4 h5 10. Ba6 b6 11. g4 d6 12. a4 Kf8 13. b4 hxg4 14. h5 Nh6 15. hxg6 Rh2 16. Rxh2 Ke8 17. Bb5 Bg4 18. Qd2 Qxa4 19. Qh6 Kd7 20. Qh7 - Oct 12 02:46 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … Bg4 18. Qd2 Qxa4 19. Qh6 Kd7
1. Nf3 f6 2. e4 c6 3. Nc3 g6 4. Nd5 cxd5 5. d4 Nc6 6. Bb5 Qa5 7. c3 Bh6 8. Ng5 Bxg5 9. h4 h5 10. Ba6 b6 11. g4 d6 12. a4 Kf8 13. b4 hxg4 14. h5 Nh6 15. hxg6 Rh2 16. Rxh2 Ke8 17. Bb5 Bg4 18. Qd2 Qxa4 19. Qh6 Kd7 - Oct 12 02:46 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … 17. Bb5 Bg4 18. Qd2 Qxa4 19. Qh6
1. Nf3 f6 2. e4 c6 3. Nc3 g6 4. Nd5 cxd5 5. d4 Nc6 6. Bb5 Qa5 7. c3 Bh6 8. Ng5 Bxg5 9. h4 h5 10. Ba6 b6 11. g4 d6 12. a4 Kf8 13. b4 hxg4 14. h5 Nh6 15. hxg6 Rh2 16. Rxh2 Ke8 17. Bb5 Bg4 18. Qd2 Qxa4 19. Qh6 - Oct 12 02:46 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … Ke8 17. Bb5 Bg4 18. Qd2 Qxa4
1. Nf3 f6 2. e4 c6 3. Nc3 g6 4. Nd5 cxd5 5. d4 Nc6 6. Bb5 Qa5 7. c3 Bh6 8. Ng5 Bxg5 9. h4 h5 10. Ba6 b6 11. g4 d6 12. a4 Kf8 13. b4 hxg4 14. h5 Nh6 15. hxg6 Rh2 16. Rxh2 Ke8 17. Bb5 Bg4 18. Qd2 Qxa4 - Oct 12 02:46 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … 16. Rxh2 Ke8 17. Bb5 Bg4 18. Qd2
1. Nf3 f6 2. e4 c6 3. Nc3 g6 4. Nd5 cxd5 5. d4 Nc6 6. Bb5 Qa5 7. c3 Bh6 8. Ng5 Bxg5 9. h4 h5 10. Ba6 b6 11. g4 d6 12. a4 Kf8 13. b4 hxg4 14. h5 Nh6 15. hxg6 Rh2 16. Rxh2 Ke8 17. Bb5 Bg4 18. Qd2 - Oct 12 02:46 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … Rh2 16. Rxh2 Ke8 17. Bb5 Bg4
1. Nf3 f6 2. e4 c6 3. Nc3 g6 4. Nd5 cxd5 5. d4 Nc6 6. Bb5 Qa5 7. c3 Bh6 8. Ng5 Bxg5 9. h4 h5 10. Ba6 b6 11. g4 d6 12. a4 Kf8 13. b4 hxg4 14. h5 Nh6 15. hxg6 Rh2 16. Rxh2 Ke8 17. Bb5 Bg4 - Oct 12 02:46 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … 15. hxg6 Rh2 16. Rxh2 Ke8 17. Bb5
1. Nf3 f6 2. e4 c6 3. Nc3 g6 4. Nd5 cxd5 5. d4 Nc6 6. Bb5 Qa5 7. c3 Bh6 8. Ng5 Bxg5 9. h4 h5 10. Ba6 b6 11. g4 d6 12. a4 Kf8 13. b4 hxg4 14. h5 Nh6 15. hxg6 Rh2 16. Rxh2 Ke8 17. Bb5