60.7M
positions
10.3M
practically solved
219.11T
engine nodes
1.7M
analyses
2,345
in queue
22
active workers
352
active cores
2.7M
nodes / sec
98.4
positions / min
131
proof number
3,777
disproof number
Root conquest: 0/20 first moves solved · 17.0% of tree positions solved · last 24h: 195,924 closures, 2.74T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 78 over 178 open obligations, of which 29 (16.3%) 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 1.5h (median of 122) · measured at 2026-09-25 18:00 UTC
Closures by source, last 24h (195969 of 195969 labelled): USER 100.0% (195881) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.0% (88) · last 7d (1183216 of 1183290): USER 99.9% (1181882) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.1% (1334). 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 d6 … d5 11. c5 a5 12. h3 Bf6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 d6 … b6 11. Be8 Kg8 12. O-O g5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. Nc3 d6 … 10. Be8 a6 11. Bg6 Rd8 12. b4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. Nc3 d6 … Kg8 11. O-O Bf8 12. Be8 e5 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 d6 … h5 11. Bg6 a6 12. b4 Re8 (User) · 128.0M nodes · NitroColoraze-zen4-16cpu-atomicdb#0
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 | 1060 | 2 | |
| g1h3 | unsolved | 804 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 435 | 2 | |
| e2e4 | unsolved | 417 | 2 | |
| b1c3 | unsolved | 72 | 2 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b2b4 | unsolved | 0 | 3 | |
| b1a3 | unsolved | 0 | 3 | |
| h2h3 | unsolved | -100 | 2 | |
| a2a3 | unsolved | -103 | 2 | |
| f2f3 | unsolved | -110 | 2 | |
| d2d3 | unsolved | -116 | 2 | |
| b2b3 | unsolved | -119 | 1 | |
| f2f4 | unsolved | -223 | 3 | |
| h2h4 | unsolved | -500 | 2 | |
| a2a4 | unsolved | -502 | 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 | NitroColoraze 78.0% of the fleet | 2.13T | 16,287 |
| 2 | BManBJ 12.2% of the fleet | 334.10B | 2,284 |
| 3 | tenzink 4.6% of the fleet | 126.68B | 1,020 |
| 4 | randomchampgamer 2.6% of the fleet | 71.68B | 531 |
| 5 | RickEdinson 1.5% of the fleet | 42.09B | 351 |
| 6 | rhaxier 0.9% of the fleet | 24.20B | 142 |
| 7 | soothdest 0.1% of the fleet | 2.89B | 26 |
7 accounts · 2.73T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 37.3% of the fleet | 81.77T | 693,894 |
| 2 | tenzink 16.1% of the fleet | 35.26T | 298,055 |
| 3 | auranvesdranor 11.5% of the fleet | 25.14T | 181,535 |
| 4 | BManBJ 11.4% of the fleet | 24.92T | 170,769 |
| 5 | JackIV 4.6% of the fleet | 10.06T | 67,859 |
| 6 | randomchampgamer 3.8% of the fleet | 8.38T | 60,669 |
| 7 | RickEdinson 2.9% of the fleet | 6.36T | 42,018 |
| 8 | NeoArcturus 1.9% of the fleet | 4.09T | 16,756 |
| 9 | MoNiKaMaDnEsS 1.8% of the fleet | 3.96T | 25,268 |
| 10 | ijh 1.6% of the fleet | 3.57T | 37,348 |
and 22 more.
32 accounts · 219.21T 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 20 proposals · see every proposal
Milestones
- Sep 25 18:19 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nc3 g6 … Be7 12. Be8 Bc5 13. dxc5 e5
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kf7 9. d4 Kg8 10. O-O Bd6 11. g3 Be7 12. Be8 Bc5 13. dxc5 e5 - Sep 25 18:19 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … Kh8 18. Bxg6 Rd8 19. Qe6 Re8
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kf7 9. d4 Kg8 10. O-O Bd6 11. g3 Be7 12. Be8 Bc5 13. dxc5 e5 14. Qd2 a5 15. Qc3 Rd8 16. Qc7 Rd7 17. Qc8 Kh8 18. Bxg6 Rd8 19. Qe6 Re8 - Sep 25 18:19 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 17. Qc8 Kh8 18. Bxg6 Rd8 19. Qe6
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kf7 9. d4 Kg8 10. O-O Bd6 11. g3 Be7 12. Be8 Bc5 13. dxc5 e5 14. Qd2 a5 15. Qc3 Rd8 16. Qc7 Rd7 17. Qc8 Kh8 18. Bxg6 Rd8 19. Qe6 - Sep 25 18:19 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … Rd7 17. Qc8 Kh8 18. Bxg6 Rd8
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kf7 9. d4 Kg8 10. O-O Bd6 11. g3 Be7 12. Be8 Bc5 13. dxc5 e5 14. Qd2 a5 15. Qc3 Rd8 16. Qc7 Rd7 17. Qc8 Kh8 18. Bxg6 Rd8 - Sep 25 18:19 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 16. Qc7 Rd7 17. Qc8 Kh8 18. Bxg6
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kf7 9. d4 Kg8 10. O-O Bd6 11. g3 Be7 12. Be8 Bc5 13. dxc5 e5 14. Qd2 a5 15. Qc3 Rd8 16. Qc7 Rd7 17. Qc8 Kh8 18. Bxg6 - Sep 25 18:19 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … Rd8 16. Qc7 Rd7 17. Qc8 Kh8
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kf7 9. d4 Kg8 10. O-O Bd6 11. g3 Be7 12. Be8 Bc5 13. dxc5 e5 14. Qd2 a5 15. Qc3 Rd8 16. Qc7 Rd7 17. Qc8 Kh8 - Sep 25 18:19 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 15. Qc3 Rd8 16. Qc7 Rd7 17. Qc8
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kf7 9. d4 Kg8 10. O-O Bd6 11. g3 Be7 12. Be8 Bc5 13. dxc5 e5 14. Qd2 a5 15. Qc3 Rd8 16. Qc7 Rd7 17. Qc8 - Sep 25 18:19 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … a5 15. Qc3 Rd8 16. Qc7 Rd7
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kf7 9. d4 Kg8 10. O-O Bd6 11. g3 Be7 12. Be8 Bc5 13. dxc5 e5 14. Qd2 a5 15. Qc3 Rd8 16. Qc7 Rd7 - Sep 25 18:19 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 14. Qd2 a5 15. Qc3 Rd8 16. Qc7
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kf7 9. d4 Kg8 10. O-O Bd6 11. g3 Be7 12. Be8 Bc5 13. dxc5 e5 14. Qd2 a5 15. Qc3 Rd8 16. Qc7 - Sep 25 18:19 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … e5 14. Qd2 a5 15. Qc3 Rd8
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kf7 9. d4 Kg8 10. O-O Bd6 11. g3 Be7 12. Be8 Bc5 13. dxc5 e5 14. Qd2 a5 15. Qc3 Rd8 - Sep 25 18:19 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 13. dxc5 e5 14. Qd2 a5 15. Qc3
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kf7 9. d4 Kg8 10. O-O Bd6 11. g3 Be7 12. Be8 Bc5 13. dxc5 e5 14. Qd2 a5 15. Qc3 - Sep 25 18:19 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … Bc5 13. dxc5 e5 14. Qd2 a5
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kf7 9. d4 Kg8 10. O-O Bd6 11. g3 Be7 12. Be8 Bc5 13. dxc5 e5 14. Qd2 a5