61.2M
positions
10.5M
practically solved
221.37T
engine nodes
1.7M
analyses
2,066
in queue
20
active workers
346
active cores
11.2M
nodes / sec
92.2
positions / min
125
proof number
3,794
disproof number
Root conquest: 0/20 first moves solved · 17.1% of tree positions solved · last 24h: 374,028 closures, 5.32T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 80 over 179 open obligations, of which 29 (16.2%) 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 4.4h (median of 76) · measured at 2026-09-25 22:00 UTC
Closures by source, last 24h (373836 of 373892 labelled): USER 98.5% (368042) · FILL 0.1% (343) · AUTO 1.4% (5192) · SOLVE 0.0% (0) · NONE 0.1% (259) · last 7d (1272183 of 1272295): USER 99.5% (1265346) · FILL 0.0% (343) · AUTO 0.4% (5192) · SOLVE 0.0% (0) · NONE 0.1% (1302). 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 … a5 11. Be8 g6 12. b5 Kf8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 d6 … a5 11. b3 Rd8 12. b4 e5 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 d6 … Kg8 11. b4 g6 12. Be8 d4 (User) · 128.0M nodes · NitroColoraze-zen4-16cpu-atomicdb#0
- 1. Nf3 f6 2. Nc3 d6 … a5 11. Be8 a4 12. Bb2 f5 (User) · 128.0M nodes · NitroColoraze-zen4-16cpu-atomicdb#2
- 1. Nf3 f6 2. Nc3 d6 … 10. O-O Ba5 11. b4 Rb8 12. Qc2 (User) · 128.0M nodes · NitroColoraze-zen4-16cpu-atomicdb#3
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 | 1059 | 2 | |
| g1h3 | unsolved | 774 | 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 79.7% of the fleet | 4.24T | 33,132 |
| 2 | BManBJ 10.6% of the fleet | 566.51B | 4,131 |
| 3 | tenzink 4.5% of the fleet | 236.81B | 1,897 |
| 4 | randomchampgamer 2.7% of the fleet | 144.51B | 1,126 |
| 5 | RickEdinson 2.0% of the fleet | 106.25B | 876 |
| 6 | rhaxier 0.5% of the fleet | 24.20B | 142 |
| 7 | soothdest 0.1% of the fleet | 2.89B | 26 |
7 accounts · 5.32T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 37.8% of the fleet | 83.88T | 710,735 |
| 2 | tenzink 15.9% of the fleet | 35.37T | 298,932 |
| 3 | BManBJ 11.3% of the fleet | 25.16T | 172,615 |
| 4 | auranvesdranor 11.3% of the fleet | 25.14T | 181,535 |
| 5 | JackIV 4.5% of the fleet | 10.06T | 67,859 |
| 6 | randomchampgamer 3.8% of the fleet | 8.45T | 61,263 |
| 7 | RickEdinson 2.9% of the fleet | 6.43T | 42,543 |
| 8 | NeoArcturus 1.8% 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 · 221.80T 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 22:44 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nc3 g6 … Kg8 12. g3 Bc5 13. dxc5 Kh7
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 Bb4 10. c3 Be7 11. Be8 Kg8 12. g3 Bc5 13. dxc5 Kh7 - Sep 25 22:44 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nc3 g6 … Kh8 12. c3 e5 13. dxe5 Kg8
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 Bd6 10. g3 Kg8 11. Be8 Kh8 12. c3 e5 13. dxe5 Kg8 - Sep 25 22:44 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … h5 17. Qd5 Kh7 18. Qg8 Kh6
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 Bd6 10. g3 Kg8 11. Be8 Kh8 12. c3 e5 13. dxe5 Kg8 14. Qa4 d4 15. Qb5 Rd8 16. Bd7 h5 17. Qd5 Kh7 18. Qg8 Kh6 - Sep 25 22:44 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 16. Bd7 h5 17. Qd5 Kh7 18. Qg8
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 Bd6 10. g3 Kg8 11. Be8 Kh8 12. c3 e5 13. dxe5 Kg8 14. Qa4 d4 15. Qb5 Rd8 16. Bd7 h5 17. Qd5 Kh7 18. Qg8 - Sep 25 22:44 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nc3 g6 … Bc7 12. c3 Rb8 13. O-O f5
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 Bd6 10. g3 Ke7 11. e4 Bc7 12. c3 Rb8 13. O-O f5 - Sep 25 22:44 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … Rd8 16. Bd7 h5 17. Qd5 Kh7
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 Bd6 10. g3 Kg8 11. Be8 Kh8 12. c3 e5 13. dxe5 Kg8 14. Qa4 d4 15. Qb5 Rd8 16. Bd7 h5 17. Qd5 Kh7 - Sep 25 22:44 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 15. Qb5 Rd8 16. Bd7 h5 17. Qd5
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 Bd6 10. g3 Kg8 11. Be8 Kh8 12. c3 e5 13. dxe5 Kg8 14. Qa4 d4 15. Qb5 Rd8 16. Bd7 h5 17. Qd5 - Sep 25 22:44 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nc3 d6 … Bb4 11. c3 Ke7 12. g3 Rh8
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 g6 8. Bb5 d5 9. d4 dxe4 10. d5 Bb4 11. c3 Ke7 12. g3 Rh8 - Sep 25 22:44 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … d4 15. Qb5 Rd8 16. Bd7 h5
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 Bd6 10. g3 Kg8 11. Be8 Kh8 12. c3 e5 13. dxe5 Kg8 14. Qa4 d4 15. Qb5 Rd8 16. Bd7 h5 - Sep 25 22:44 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 14. Qa4 d4 15. Qb5 Rd8 16. Bd7
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 Bd6 10. g3 Kg8 11. Be8 Kh8 12. c3 e5 13. dxe5 Kg8 14. Qa4 d4 15. Qb5 Rd8 16. Bd7 - Sep 25 22:44 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … Kg8 14. Qa4 d4 15. Qb5 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 Bd6 10. g3 Kg8 11. Be8 Kh8 12. c3 e5 13. dxe5 Kg8 14. Qa4 d4 15. Qb5 Rd8 - Sep 25 22:44 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 13. dxe5 Kg8 14. Qa4 d4 15. Qb5
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 Bd6 10. g3 Kg8 11. Be8 Kh8 12. c3 e5 13. dxe5 Kg8 14. Qa4 d4 15. Qb5