60.7M
positions
10.3M
practically solved
219.11T
engine nodes
1.7M
analyses
4,428
in queue
22
active workers
352
active cores
8.7M
nodes / sec
72.8
positions / min
131
proof number
3,777
disproof number
Root conquest: 0/20 first moves solved · 17.0% of tree positions solved · last 24h: 240,111 closures, 3.21T 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 (240111 of 240133 labelled): USER 99.9% (239984) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.1% (127) · last 7d (1220088 of 1220238): USER 99.9% (1218750) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.1% (1338). 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 … Bh6 12. Bg5 Kh8 13. Qd2 f5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 d6 … Bh6 12. Bg5 a4 13. Qd2 Ra7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. Nc3 d6 … Kg8 12. h3 Bh6 13. Qd2 Bg7 (User) · 128.0M nodes · NitroColoraze-zen4-16cpu-atomicdb#0
- 1. Nf3 f6 2. Nc3 g6 … Kh8 12. c3 b5 13. e4 Kg8 (User) · 128.0M nodes · NitroColoraze-zen4-16cpu-atomicdb#1
- 1. Nf3 f6 2. Nc3 g6 … Bd6 12. g3 a5 13. Kh1 Bb8 (User) · 128.0M nodes · NitroColoraze-zen4-16cpu-atomicdb#2
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 | 801 | 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 78.3% of the fleet | 2.52T | 19,520 |
| 2 | BManBJ 11.9% of the fleet | 382.55B | 2,733 |
| 3 | tenzink 4.6% of the fleet | 148.58B | 1,190 |
| 4 | randomchampgamer 2.6% of the fleet | 83.44B | 638 |
| 5 | RickEdinson 1.7% of the fleet | 54.95B | 466 |
| 6 | rhaxier 0.8% of the fleet | 24.20B | 142 |
| 7 | soothdest 0.1% of the fleet | 2.89B | 26 |
7 accounts · 3.21T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 37.4% of the fleet | 82.16T | 697,124 |
| 2 | tenzink 16.1% of the fleet | 35.28T | 298,224 |
| 3 | auranvesdranor 11.4% of the fleet | 25.14T | 181,535 |
| 4 | BManBJ 11.4% of the fleet | 24.97T | 171,218 |
| 5 | JackIV 4.6% of the fleet | 10.06T | 67,859 |
| 6 | randomchampgamer 3.8% of the fleet | 8.39T | 60,776 |
| 7 | RickEdinson 2.9% of the fleet | 6.38T | 42,133 |
| 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 · 219.69T 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 19:16 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nc3 g6 … Bg7 10. c4 Bf8 11. O-O g5
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 h5 8. Bb5 Kf7 9. d4 Bg7 10. c4 Bf8 11. O-O g5 - Sep 25 19:16 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … Kh8 19. Bg7 Kh7 20. Bf5 Kg8
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 h5 8. Bb5 Kf7 9. d4 Bg7 10. c4 Bf8 11. O-O g5 12. Bd7 Kg7 13. Qc2 f5 14. e4 e5 15. Qb3 g4 16. c5 d5 17. g3 fxe4 18. Bh6 Kh8 19. Bg7 Kh7 20. Bf5 Kg8 - Sep 25 19:16 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 18. Bh6 Kh8 19. Bg7 Kh7 20. Bf5
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 h5 8. Bb5 Kf7 9. d4 Bg7 10. c4 Bf8 11. O-O g5 12. Bd7 Kg7 13. Qc2 f5 14. e4 e5 15. Qb3 g4 16. c5 d5 17. g3 fxe4 18. Bh6 Kh8 19. Bg7 Kh7 20. Bf5 - Sep 25 19:16 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … fxe4 18. Bh6 Kh8 19. Bg7 Kh7
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 h5 8. Bb5 Kf7 9. d4 Bg7 10. c4 Bf8 11. O-O g5 12. Bd7 Kg7 13. Qc2 f5 14. e4 e5 15. Qb3 g4 16. c5 d5 17. g3 fxe4 18. Bh6 Kh8 19. Bg7 Kh7 - Sep 25 19:16 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 17. g3 fxe4 18. Bh6 Kh8 19. Bg7
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 h5 8. Bb5 Kf7 9. d4 Bg7 10. c4 Bf8 11. O-O g5 12. Bd7 Kg7 13. Qc2 f5 14. e4 e5 15. Qb3 g4 16. c5 d5 17. g3 fxe4 18. Bh6 Kh8 19. Bg7 - Sep 25 19:16 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … d5 17. g3 fxe4 18. Bh6 Kh8
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 h5 8. Bb5 Kf7 9. d4 Bg7 10. c4 Bf8 11. O-O g5 12. Bd7 Kg7 13. Qc2 f5 14. e4 e5 15. Qb3 g4 16. c5 d5 17. g3 fxe4 18. Bh6 Kh8 - Sep 25 19:16 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 16. c5 d5 17. g3 fxe4 18. Bh6
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 h5 8. Bb5 Kf7 9. d4 Bg7 10. c4 Bf8 11. O-O g5 12. Bd7 Kg7 13. Qc2 f5 14. e4 e5 15. Qb3 g4 16. c5 d5 17. g3 fxe4 18. Bh6 - Sep 25 19:16 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … g4 16. c5 d5 17. g3 fxe4
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 h5 8. Bb5 Kf7 9. d4 Bg7 10. c4 Bf8 11. O-O g5 12. Bd7 Kg7 13. Qc2 f5 14. e4 e5 15. Qb3 g4 16. c5 d5 17. g3 fxe4 - Sep 25 19:16 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 15. Qb3 g4 16. c5 d5 17. g3
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 h5 8. Bb5 Kf7 9. d4 Bg7 10. c4 Bf8 11. O-O g5 12. Bd7 Kg7 13. Qc2 f5 14. e4 e5 15. Qb3 g4 16. c5 d5 17. g3 - Sep 25 19:16 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … e5 15. Qb3 g4 16. c5 d5
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 h5 8. Bb5 Kf7 9. d4 Bg7 10. c4 Bf8 11. O-O g5 12. Bd7 Kg7 13. Qc2 f5 14. e4 e5 15. Qb3 g4 16. c5 d5 - Sep 25 19:16 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 14. e4 e5 15. Qb3 g4 16. c5
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 h5 8. Bb5 Kf7 9. d4 Bg7 10. c4 Bf8 11. O-O g5 12. Bd7 Kg7 13. Qc2 f5 14. e4 e5 15. Qb3 g4 16. c5 - Sep 25 19:16 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … f5 14. e4 e5 15. Qb3 g4
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 h5 8. Bb5 Kf7 9. d4 Bg7 10. c4 Bf8 11. O-O g5 12. Bd7 Kg7 13. Qc2 f5 14. e4 e5 15. Qb3 g4