60.3M
positions
10.2M
practically solved
217.21T
engine nodes
1.7M
analyses
1,591
in queue
21
active workers
344
active cores
65.7M
nodes / sec
92.0
positions / min
131
proof number
3,777
disproof number
Root conquest: 0/20 first moves solved · 16.8% of tree positions solved · last 24h: 48,931 closures, 795.77B nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 78 over 173 open obligations, of which 29 (16.8%) 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 10.9m (median of 89) · measured at 2026-09-25 15:00 UTC
Closures by source, last 24h (49013 of 49013 labelled): USER 99.9% (48981) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.1% (32) · last 7d (1070806 of 1070862): USER 99.9% (1069412) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.1% (1394). 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 a6 … Kg8 11. Ba3 Be7 12. Bd3 Ra8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 d6 … Rc8 10. c3 Rc7 11. O-O Rc5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. Nc3 d6 … Rc8 10. c3 Rc7 11. O-O e5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. Nc3 a6 … Kg8 11. Ba3 Kh7 12. Qa4 Be7 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. c4 Na6 (User) · 10.00B 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 | 1083 | 2 | |
| g1h3 | unsolved | 775 | 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 69.2% of the fleet | 550.49B | 4,012 |
| 2 | BManBJ 19.8% of the fleet | 157.36B | 919 |
| 3 | tenzink 6.1% of the fleet | 48.66B | 378 |
| 4 | rhaxier 3.0% of the fleet | 24.20B | 142 |
| 5 | randomchampgamer 1.5% of the fleet | 12.16B | 101 |
| 6 | soothdest 0.4% of the fleet | 2.89B | 26 |
6 accounts · 795.77B nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 36.9% of the fleet | 80.20T | 681,623 |
| 2 | tenzink 16.2% of the fleet | 35.18T | 297,413 |
| 3 | auranvesdranor 11.6% of the fleet | 25.14T | 181,535 |
| 4 | BManBJ 11.4% of the fleet | 24.75T | 169,404 |
| 5 | JackIV 4.6% of the fleet | 10.06T | 67,859 |
| 6 | randomchampgamer 3.8% of the fleet | 8.32T | 60,239 |
| 7 | RickEdinson 2.9% of the fleet | 6.32T | 41,667 |
| 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 · 217.28T 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 15:11 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nc3 g6 … Ke7 11. e4 Ba3 12. bxa3 Rg8
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 Ba3 12. bxa3 Rg8 - Sep 25 15:11 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … e5 16. dxe5 b5 17. Qb7 b4
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 Ba3 12. bxa3 Rg8 13. Be8 a5 14. exd5 Kd8 15. Qf3 e5 16. dxe5 b5 17. Qb7 b4 - Sep 25 15:11 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 15. Qf3 e5 16. dxe5 b5 17. Qb7
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 Ba3 12. bxa3 Rg8 13. Be8 a5 14. exd5 Kd8 15. Qf3 e5 16. dxe5 b5 17. Qb7 - Sep 25 15:11 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … Kd8 15. Qf3 e5 16. dxe5 b5
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 Ba3 12. bxa3 Rg8 13. Be8 a5 14. exd5 Kd8 15. Qf3 e5 16. dxe5 b5 - Sep 25 15:11 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 14. exd5 Kd8 15. Qf3 e5 16. dxe5
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 Ba3 12. bxa3 Rg8 13. Be8 a5 14. exd5 Kd8 15. Qf3 e5 16. dxe5 - Sep 25 15:11 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … a5 14. exd5 Kd8 15. Qf3 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 Bd6 10. g3 Ke7 11. e4 Ba3 12. bxa3 Rg8 13. Be8 a5 14. exd5 Kd8 15. Qf3 e5 - Sep 25 15:11 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 13. Be8 a5 14. exd5 Kd8 15. Qf3
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 Ba3 12. bxa3 Rg8 13. Be8 a5 14. exd5 Kd8 15. Qf3 - Sep 25 15:11 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … Rg8 13. Be8 a5 14. exd5 Kd8
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 Ba3 12. bxa3 Rg8 13. Be8 a5 14. exd5 Kd8 - Sep 25 15:11 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 12. bxa3 Rg8 13. Be8 a5 14. exd5
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 Ba3 12. bxa3 Rg8 13. Be8 a5 14. exd5 - Sep 25 15:11 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … Ba3 12. bxa3 Rg8 13. Be8 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 Bd6 10. g3 Ke7 11. e4 Ba3 12. bxa3 Rg8 13. Be8 a5 - Sep 25 15:11 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 11. e4 Ba3 12. bxa3 Rg8 13. Be8
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 Ba3 12. bxa3 Rg8 13. Be8 - Sep 25 15:11 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … b5 16. Bxb5 a6 17. Qb7 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 Bd6 10. g3 Ke7 11. e4 Ba3 12. bxa3 Rg8 13. Bd7 e5 14. Ba3 Kd8 15. Qb1 b5 16. Bxb5 a6 17. Qb7 Re8