76.1M
positions
14.3M
practically solved
273.67T
engine nodes
2.1M
analyses
16
in queue
10
active workers
56
active cores
19.7M
nodes / sec
21.0
positions / min
82
proof number
3,796
disproof number
Root conquest: 0/20 first moves solved · 18.8% of tree positions solved · last 24h: 230,257 closures, 3.76T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 69 over 219 open obligations, of which 42 (19.2%) 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 12.9d (median of 2) · measured at 2026-10-06 09:00 UTC
Closures by source, last 24h (230268 of 230268 labelled): USER 99.8% (229806) · FILL 0.1% (189) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.1% (273) · last 7d (2110476 of 2110476): USER 99.8% (2105533) · FILL 0.0% (189) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.2% (4754). 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. e4 e6 … Kh6 24. Kc1 Be6 25. Rxh2 Kg5 (User) · 512.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 c6 … b5 19. a6 d5 20. c6 Qc7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. Ne5 fxe5 … Bxb3 10. Na3 e5 11. Kd1 Nf6 (Fill) · 512.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nh3 e6 2. e3 g6 … 8. Nf4 a5 9. h3 Ne5 10. Nxe6 (Fill) · 512.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nh3 f6 2. d4 e5 … 5. Nxh7 g6 6. Nb5 Na6 7. a3 (Fill) · 512.0M 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 | 1079 | 2 | |
| g1h3 | unsolved | 820 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 441 | 2 | |
| e2e4 | unsolved | 418 | 2 | |
| b1c3 | unsolved | 105 | 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 | BManBJ 43.5% of the fleet | 1.63T | 9,332 |
| 2 | tenzink 18.6% of the fleet | 699.17B | 3,847 |
| 3 | randomchampgamer 17.8% of the fleet | 668.45B | 3,742 |
| 4 | RickEdinson 13.0% of the fleet | 487.82B | 2,703 |
| 5 | MoNiKaMaDnEsS 7.1% of the fleet | 266.72B | 1,605 |
| 6 | soothdest <0.1% of the fleet | 474.8M | 26 |
| 7 | quasa <0.1% of the fleet | 281.8M | 3 |
7 accounts · 3.76T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 33.0% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.3% of the fleet | 41.81T | 342,604 |
| 3 | BManBJ 14.3% of the fleet | 39.06T | 274,439 |
| 4 | auranvesdranor 11.5% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 5.3% of the fleet | 14.58T | 107,494 |
| 6 | JackIV 3.7% of the fleet | 10.06T | 67,859 |
| 7 | RickEdinson 3.5% of the fleet | 9.63T | 64,432 |
| 8 | gannet 2.6% of the fleet | 7.24T | 46,848 |
| 9 | MoNiKaMaDnEsS 2.1% of the fleet | 5.69T | 38,109 |
| 10 | NeoArcturus 1.5% of the fleet | 4.09T | 16,758 |
and 25 more.
35 accounts · 273.78T 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 · 17 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 21 proposals · see every proposal
Milestones
- Oct 06 09:41 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 18. Qa4 bxa5 19. f4 Rh1 20. Kf2
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 a6 8. O-O axb5 9. c4 d6 10. a4 Bh6 11. Ng5 Bxg5 12. a5 b6 13. b4 Nh6 14. c5 Ng4 15. hxg4 h6 16. Qc2 f5 17. Bg5 hxg5 18. Qa4 bxa5 19. f4 Rh1 20. Kf2 - Oct 06 09:41 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … hxg5 18. Qa4 bxa5 19. f4 Rh1
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 a6 8. O-O axb5 9. c4 d6 10. a4 Bh6 11. Ng5 Bxg5 12. a5 b6 13. b4 Nh6 14. c5 Ng4 15. hxg4 h6 16. Qc2 f5 17. Bg5 hxg5 18. Qa4 bxa5 19. f4 Rh1 - Oct 06 09:41 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 17. Bg5 hxg5 18. Qa4 bxa5 19. f4
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 a6 8. O-O axb5 9. c4 d6 10. a4 Bh6 11. Ng5 Bxg5 12. a5 b6 13. b4 Nh6 14. c5 Ng4 15. hxg4 h6 16. Qc2 f5 17. Bg5 hxg5 18. Qa4 bxa5 19. f4 - Oct 06 09:41 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … f5 17. Bg5 hxg5 18. Qa4 bxa5
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 a6 8. O-O axb5 9. c4 d6 10. a4 Bh6 11. Ng5 Bxg5 12. a5 b6 13. b4 Nh6 14. c5 Ng4 15. hxg4 h6 16. Qc2 f5 17. Bg5 hxg5 18. Qa4 bxa5 - Oct 06 09:41 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 16. Qc2 f5 17. Bg5 hxg5 18. Qa4
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 a6 8. O-O axb5 9. c4 d6 10. a4 Bh6 11. Ng5 Bxg5 12. a5 b6 13. b4 Nh6 14. c5 Ng4 15. hxg4 h6 16. Qc2 f5 17. Bg5 hxg5 18. Qa4 - Oct 06 09:41 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … h6 16. Qc2 f5 17. Bg5 hxg5
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 a6 8. O-O axb5 9. c4 d6 10. a4 Bh6 11. Ng5 Bxg5 12. a5 b6 13. b4 Nh6 14. c5 Ng4 15. hxg4 h6 16. Qc2 f5 17. Bg5 hxg5 - Oct 06 09:41 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 15. hxg4 h6 16. Qc2 f5 17. Bg5
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 a6 8. O-O axb5 9. c4 d6 10. a4 Bh6 11. Ng5 Bxg5 12. a5 b6 13. b4 Nh6 14. c5 Ng4 15. hxg4 h6 16. Qc2 f5 17. Bg5 - Oct 06 09:41 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 18. Qa4 bxa5 19. Rxa8 Qh2 20. Kf2
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 a6 8. O-O axb5 9. c4 d6 10. a4 Bh6 11. Ng5 Bxg5 12. a5 b6 13. b4 Nh6 14. c5 Ng4 15. hxg4 h6 16. Qc2 f5 17. f4 Qh4 18. Qa4 bxa5 19. Rxa8 Qh2 20. Kf2 - Oct 06 09:41 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Qh4 18. Qa4 bxa5 19. Rxa8 Qh2
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 a6 8. O-O axb5 9. c4 d6 10. a4 Bh6 11. Ng5 Bxg5 12. a5 b6 13. b4 Nh6 14. c5 Ng4 15. hxg4 h6 16. Qc2 f5 17. f4 Qh4 18. Qa4 bxa5 19. Rxa8 Qh2 - Oct 06 09:41 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 17. f4 Qh4 18. Qa4 bxa5 19. Rxa8
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 a6 8. O-O axb5 9. c4 d6 10. a4 Bh6 11. Ng5 Bxg5 12. a5 b6 13. b4 Nh6 14. c5 Ng4 15. hxg4 h6 16. Qc2 f5 17. f4 Qh4 18. Qa4 bxa5 19. Rxa8 - Oct 06 09:41 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … f5 17. f4 Qh4 18. Qa4 bxa5
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 a6 8. O-O axb5 9. c4 d6 10. a4 Bh6 11. Ng5 Bxg5 12. a5 b6 13. b4 Nh6 14. c5 Ng4 15. hxg4 h6 16. Qc2 f5 17. f4 Qh4 18. Qa4 bxa5 - Oct 06 09:41 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 16. Qc2 f5 17. f4 Qh4 18. Qa4
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 a6 8. O-O axb5 9. c4 d6 10. a4 Bh6 11. Ng5 Bxg5 12. a5 b6 13. b4 Nh6 14. c5 Ng4 15. hxg4 h6 16. Qc2 f5 17. f4 Qh4 18. Qa4