104.5M
positions
22.2M
practically solved
386.30T
engine nodes
2.9M
analyses
843
in queue
active workers
92
active cores
66.8M
nodes / sec
22.0
positions / min
107
proof number
4,824
disproof number
Root conquest: 0/20 first moves solved · 21.3% of tree positions solved · last 24h: 111,493 closures, 2.80T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 over 201 open obligations, of which 37 (18.4%) 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 2.7m (median of 128) · measured at 2026-11-01 07:00 UTC
Closures by source, last 24h (111493 of 111493 labelled): USER 99.8% (111228) · FILL 0.2% (231) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.0% (34) · last 7d (1245656 of 1245656): USER 97.9% (1219410) · FILL 0.8% (9572) · AUTO 1.3% (16193) · SOLVE 0.0% (0) · NONE 0.0% (481). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing all workers
- 1. Nf3 f6 2. e4 e6 … 14. f4 Kf8 15. Qd2 b4 16. f5 (User) · 128.0M nodes · acornwood
- 1. e4 d6 2. Nh3 f5 … Kf7 10. Nb5 Nc6 11. b4 Be6 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#0
- 1. e4 d6 2. Nh3 f5 … Kf7 10. Nb5 Nc6 11. b4 Ba6 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#1
- 1. e4 d6 2. Nh3 f5 … Kf7 10. Nb5 Nc6 11. b4 Bf5 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#2
- 1. e4 d6 2. Nh3 f5 … Kf7 10. Nb5 Nc6 11. b4 Bg4 (User) · 512.0M nodes · BManBJ-Laptop-Blake-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 | 1107 | 2 | |
| g1h3 | unsolved | 753 | 2 | |
| e2e3 | unsolved | 437 | 3 | |
| e2e4 | unsolved | 410 | 2 | |
| d2d4 | unsolved | 405 | 2 | |
| b1c3 | unsolved | 142 | 2 | |
| b1a3 | unsolved | 0 | 3 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b2b4 | unsolved | -59 | 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 58.6% of the fleet | 1.64T | 6,648 |
| 2 | gannet 20.9% of the fleet | 585.46B | 4,309 |
| 3 | RickEdinson 16.3% of the fleet | 455.99B | 3,088 |
| 4 | MoNiKaMaDnEsS 3.9% of the fleet | 110.36B | 649 |
| 5 | soothdest 0.4% of the fleet | 10.22B | 64 |
5 accounts · 2.80T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 23.4% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 20.5% of the fleet | 79.08T | 532,813 |
| 3 | Torom 13.1% of the fleet | 50.55T | 363,522 |
| 4 | tenzink 11.1% of the fleet | 42.83T | 349,427 |
| 5 | auranvesdranor 8.1% of the fleet | 31.40T | 228,002 |
| 6 | RickEdinson 5.5% of the fleet | 21.36T | 140,089 |
| 7 | randomchampgamer 5.1% of the fleet | 19.85T | 140,897 |
| 8 | MoNiKaMaDnEsS 3.2% of the fleet | 12.54T | 86,740 |
| 9 | JackIV 2.6% of the fleet | 10.06T | 67,859 |
| 10 | gannet 2.0% of the fleet | 7.82T | 51,157 |
and 25 more.
35 accounts · 386.49T 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
- Nov 01 07:53 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … gxf4 18. Qh5 Ke7 19. Qe8 Kd6
1. Nh3 d5 2. Nc3 h6 3. d4 c6 4. e3 Bg4 5. f3 Na6 6. Ng5 hxg5 7. Ne4 dxe4 8. d5 e6 9. b4 Rh4 10. g3 Bxb4 11. c3 Nb4 12. Bd3 Nf6 13. dxe6 f5 14. a4 Rxh2 15. Kf1 g5 16. Ra2 Nc2 17. f4 gxf4 18. Qh5 Ke7 19. Qe8 Kd6 - Nov 01 07:53 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … 17. f4 gxf4 18. Qh5 Ke7 19. Qe8
1. Nh3 d5 2. Nc3 h6 3. d4 c6 4. e3 Bg4 5. f3 Na6 6. Ng5 hxg5 7. Ne4 dxe4 8. d5 e6 9. b4 Rh4 10. g3 Bxb4 11. c3 Nb4 12. Bd3 Nf6 13. dxe6 f5 14. a4 Rxh2 15. Kf1 g5 16. Ra2 Nc2 17. f4 gxf4 18. Qh5 Ke7 19. Qe8 - Nov 01 07:53 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … Nc2 17. f4 gxf4 18. Qh5 Ke7
1. Nh3 d5 2. Nc3 h6 3. d4 c6 4. e3 Bg4 5. f3 Na6 6. Ng5 hxg5 7. Ne4 dxe4 8. d5 e6 9. b4 Rh4 10. g3 Bxb4 11. c3 Nb4 12. Bd3 Nf6 13. dxe6 f5 14. a4 Rxh2 15. Kf1 g5 16. Ra2 Nc2 17. f4 gxf4 18. Qh5 Ke7 - Nov 01 07:53 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … 16. Ra2 Nc2 17. f4 gxf4 18. Qh5
1. Nh3 d5 2. Nc3 h6 3. d4 c6 4. e3 Bg4 5. f3 Na6 6. Ng5 hxg5 7. Ne4 dxe4 8. d5 e6 9. b4 Rh4 10. g3 Bxb4 11. c3 Nb4 12. Bd3 Nf6 13. dxe6 f5 14. a4 Rxh2 15. Kf1 g5 16. Ra2 Nc2 17. f4 gxf4 18. Qh5 - Nov 01 07:53 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … g5 16. Ra2 Nc2 17. f4 gxf4
1. Nh3 d5 2. Nc3 h6 3. d4 c6 4. e3 Bg4 5. f3 Na6 6. Ng5 hxg5 7. Ne4 dxe4 8. d5 e6 9. b4 Rh4 10. g3 Bxb4 11. c3 Nb4 12. Bd3 Nf6 13. dxe6 f5 14. a4 Rxh2 15. Kf1 g5 16. Ra2 Nc2 17. f4 gxf4 - Nov 01 07:53 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … Qg6 19. Bxf5 Kd8 20. Qe8 Kc7
1. Nh3 d5 2. Nc3 h6 3. d4 c6 4. e3 Bg4 5. f3 Na6 6. Ng5 hxg5 7. Ne4 dxe4 8. d5 e6 9. b4 Rh4 10. g3 Bxb4 11. c3 Nb4 12. Bd3 Nf6 13. dxe6 f5 14. a4 Rxh2 15. Kf1 g5 16. Ra2 Nc2 17. f4 Qd6 18. Qh5 Qg6 19. Bxf5 Kd8 20. Qe8 Kc7 - Nov 01 07:53 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … 18. Qh5 Qg6 19. Bxf5 Kd8 20. Qe8
1. Nh3 d5 2. Nc3 h6 3. d4 c6 4. e3 Bg4 5. f3 Na6 6. Ng5 hxg5 7. Ne4 dxe4 8. d5 e6 9. b4 Rh4 10. g3 Bxb4 11. c3 Nb4 12. Bd3 Nf6 13. dxe6 f5 14. a4 Rxh2 15. Kf1 g5 16. Ra2 Nc2 17. f4 Qd6 18. Qh5 Qg6 19. Bxf5 Kd8 20. Qe8 - Nov 01 07:53 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … Qd6 18. Qh5 Qg6 19. Bxf5 Kd8
1. Nh3 d5 2. Nc3 h6 3. d4 c6 4. e3 Bg4 5. f3 Na6 6. Ng5 hxg5 7. Ne4 dxe4 8. d5 e6 9. b4 Rh4 10. g3 Bxb4 11. c3 Nb4 12. Bd3 Nf6 13. dxe6 f5 14. a4 Rxh2 15. Kf1 g5 16. Ra2 Nc2 17. f4 Qd6 18. Qh5 Qg6 19. Bxf5 Kd8 - Nov 01 07:53 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … 17. f4 Qd6 18. Qh5 Qg6 19. Bxf5
1. Nh3 d5 2. Nc3 h6 3. d4 c6 4. e3 Bg4 5. f3 Na6 6. Ng5 hxg5 7. Ne4 dxe4 8. d5 e6 9. b4 Rh4 10. g3 Bxb4 11. c3 Nb4 12. Bd3 Nf6 13. dxe6 f5 14. a4 Rxh2 15. Kf1 g5 16. Ra2 Nc2 17. f4 Qd6 18. Qh5 Qg6 19. Bxf5 - Nov 01 07:53 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … Nc2 17. f4 Qd6 18. Qh5 Qg6
1. Nh3 d5 2. Nc3 h6 3. d4 c6 4. e3 Bg4 5. f3 Na6 6. Ng5 hxg5 7. Ne4 dxe4 8. d5 e6 9. b4 Rh4 10. g3 Bxb4 11. c3 Nb4 12. Bd3 Nf6 13. dxe6 f5 14. a4 Rxh2 15. Kf1 g5 16. Ra2 Nc2 17. f4 Qd6 18. Qh5 Qg6 - Nov 01 07:53 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … 16. Ra2 Nc2 17. f4 Qd6 18. Qh5
1. Nh3 d5 2. Nc3 h6 3. d4 c6 4. e3 Bg4 5. f3 Na6 6. Ng5 hxg5 7. Ne4 dxe4 8. d5 e6 9. b4 Rh4 10. g3 Bxb4 11. c3 Nb4 12. Bd3 Nf6 13. dxe6 f5 14. a4 Rxh2 15. Kf1 g5 16. Ra2 Nc2 17. f4 Qd6 18. Qh5 - Nov 01 07:53 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … g5 16. Ra2 Nc2 17. f4 Qd6
1. Nh3 d5 2. Nc3 h6 3. d4 c6 4. e3 Bg4 5. f3 Na6 6. Ng5 hxg5 7. Ne4 dxe4 8. d5 e6 9. b4 Rh4 10. g3 Bxb4 11. c3 Nb4 12. Bd3 Nf6 13. dxe6 f5 14. a4 Rxh2 15. Kf1 g5 16. Ra2 Nc2 17. f4 Qd6