80.2M
positions
15.5M
practically solved
289.80T
engine nodes
2.2M
analyses
4,439
in queue
14
active workers
66
active cores
5.5M
nodes / sec
34.1
positions / min
82
proof number
4,106
disproof number
Root conquest: 0/20 first moves solved · 19.3% of tree positions solved · last 24h: 305,317 closures, 4.34T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 70 over 218 open obligations, of which 41 (18.8%) 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 1.4h (median of 139) · measured at 2026-10-09 20:00 UTC
Closures by source, last 24h (305153 of 305153 labelled): USER 100.0% (305094) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.0% (59) · last 7d (1722343 of 1722507): USER 99.0% (1705379) · FILL 0.1% (2071) · AUTO 0.7% (11952) · SOLVE 0.0% (0) · NONE 0.2% (2941). 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 Na6 … f5 13. d4 g5 14. Qd2 Bg7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 Na6 … f5 13. d4 g5 14. Qd2 Ke8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. e4 e6 … 25. b4 a5 26. Rc7 axb4 27. Rb1 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nh3 d5 2. Nc3 h6 … Bd7 10. a4 g6 11. g4 c5 (User) · 512.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 Na6 … f5 13. d4 f4 14. h4 g5 (User) · 128.0M nodes · randomchampgamer-2026PC-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 | 1068 | 2 | |
| g1h3 | unsolved | 820 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| e2e4 | unsolved | 400 | 2 | |
| d2d4 | unsolved | 379 | 2 | |
| b1c3 | unsolved | 127 | 2 | |
| b1a3 | unsolved | 0 | 3 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b2b4 | unsolved | -73 | 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 | Torom 37.6% of the fleet | 1.63T | 10,952 |
| 2 | BManBJ 34.7% of the fleet | 1.51T | 9,806 |
| 3 | randomchampgamer 15.1% of the fleet | 657.68B | 4,899 |
| 4 | RickEdinson 10.1% of the fleet | 436.81B | 2,784 |
| 5 | MoNiKaMaDnEsS 2.5% of the fleet | 107.50B | 662 |
| 6 | soothdest <0.1% of the fleet | 8.0M | 17 |
6 accounts · 4.34T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 31.1% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 15.3% of the fleet | 44.31T | 309,822 |
| 3 | tenzink 14.8% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.8% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 5.8% of the fleet | 16.82T | 123,433 |
| 6 | RickEdinson 3.9% of the fleet | 11.19T | 74,571 |
| 7 | JackIV 3.5% of the fleet | 10.06T | 67,859 |
| 8 | Torom 3.1% of the fleet | 9.01T | 66,700 |
| 9 | gannet 2.5% of the fleet | 7.24T | 46,848 |
| 10 | MoNiKaMaDnEsS 2.2% of the fleet | 6.31T | 42,670 |
and 25 more.
35 accounts · 290.06T 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 · 17 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 22 proposals · see every proposal
Milestones
- Oct 09 20:58 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nc3 Na6 … f5 13. d4 g5 14. Qd2 h5
1. Nf3 f6 2. Nc3 Na6 3. Ng5 d6 4. Nf7 e6 5. Nb5 Nb8 6. Nxc7 a6 7. c4 Rb8 8. Qa4 b5 9. Qa5 Rb6 10. Nxh8 Kd8 11. c5 h6 12. e4 f5 13. d4 g5 14. Qd2 h5 - Oct 09 20:58 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 Na6 … Bg7 16. Qc2 e5 17. Qc7 Ke8
1. Nf3 f6 2. Nc3 Na6 3. Ng5 d6 4. Nf7 e6 5. Nb5 Nb8 6. Nxc7 a6 7. c4 Rb8 8. Qa4 b5 9. Qa5 Rb6 10. Nxh8 Kd8 11. c5 h6 12. e4 f5 13. d4 g5 14. Qd2 h5 15. cxb6 Bg7 16. Qc2 e5 17. Qc7 Ke8 - Oct 09 20:58 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 Na6 … 15. cxb6 Bg7 16. Qc2 e5 17. Qc7
1. Nf3 f6 2. Nc3 Na6 3. Ng5 d6 4. Nf7 e6 5. Nb5 Nb8 6. Nxc7 a6 7. c4 Rb8 8. Qa4 b5 9. Qa5 Rb6 10. Nxh8 Kd8 11. c5 h6 12. e4 f5 13. d4 g5 14. Qd2 h5 15. cxb6 Bg7 16. Qc2 e5 17. Qc7 - Oct 09 20:58 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 Na6 … h5 15. cxb6 Bg7 16. Qc2 e5
1. Nf3 f6 2. Nc3 Na6 3. Ng5 d6 4. Nf7 e6 5. Nb5 Nb8 6. Nxc7 a6 7. c4 Rb8 8. Qa4 b5 9. Qa5 Rb6 10. Nxh8 Kd8 11. c5 h6 12. e4 f5 13. d4 g5 14. Qd2 h5 15. cxb6 Bg7 16. Qc2 e5 - Oct 09 20:58 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 Na6 … 14. Qd2 h5 15. cxb6 Bg7 16. Qc2
1. Nf3 f6 2. Nc3 Na6 3. Ng5 d6 4. Nf7 e6 5. Nb5 Nb8 6. Nxc7 a6 7. c4 Rb8 8. Qa4 b5 9. Qa5 Rb6 10. Nxh8 Kd8 11. c5 h6 12. e4 f5 13. d4 g5 14. Qd2 h5 15. cxb6 Bg7 16. Qc2 - Oct 09 20:58 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nc3 Na6 … f5 13. d4 g5 14. Qd2 Kd7
1. Nf3 f6 2. Nc3 Na6 3. Ng5 d6 4. Nf7 e6 5. Nb5 Nb8 6. Nxc7 a6 7. c4 Rb8 8. Qa4 b5 9. Qa5 Rb6 10. Nxh8 Kd8 11. c5 h6 12. e4 f5 13. d4 g5 14. Qd2 Kd7 - Oct 09 20:58 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 Na6 … g5 14. Qd2 h5 15. cxb6 Bg7
1. Nf3 f6 2. Nc3 Na6 3. Ng5 d6 4. Nf7 e6 5. Nb5 Nb8 6. Nxc7 a6 7. c4 Rb8 8. Qa4 b5 9. Qa5 Rb6 10. Nxh8 Kd8 11. c5 h6 12. e4 f5 13. d4 g5 14. Qd2 h5 15. cxb6 Bg7 - Oct 09 20:58 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 Na6 … 13. d4 g5 14. Qd2 h5 15. cxb6
1. Nf3 f6 2. Nc3 Na6 3. Ng5 d6 4. Nf7 e6 5. Nb5 Nb8 6. Nxc7 a6 7. c4 Rb8 8. Qa4 b5 9. Qa5 Rb6 10. Nxh8 Kd8 11. c5 h6 12. e4 f5 13. d4 g5 14. Qd2 h5 15. cxb6 - Oct 09 20:58 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 Na6 … dxc5 17. Qe8 Kb7 18. Qb8 Kc6
1. Nf3 f6 2. Nc3 Na6 3. Ng5 d6 4. Nf7 e6 5. Nb5 Nb8 6. Nxc7 a6 7. c4 Rb8 8. Qa4 b5 9. Qa5 Rb6 10. Nxh8 Kd8 11. c5 h6 12. e4 f5 13. d4 g5 14. Qd2 Kd7 15. Qe2 Kc8 16. Qh5 dxc5 17. Qe8 Kb7 18. Qb8 Kc6 - Oct 09 20:58 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 Na6 … 16. Qh5 dxc5 17. Qe8 Kb7 18. Qb8
1. Nf3 f6 2. Nc3 Na6 3. Ng5 d6 4. Nf7 e6 5. Nb5 Nb8 6. Nxc7 a6 7. c4 Rb8 8. Qa4 b5 9. Qa5 Rb6 10. Nxh8 Kd8 11. c5 h6 12. e4 f5 13. d4 g5 14. Qd2 Kd7 15. Qe2 Kc8 16. Qh5 dxc5 17. Qe8 Kb7 18. Qb8 - Oct 09 20:58 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 Na6 … Kc8 16. Qh5 dxc5 17. Qe8 Kb7
1. Nf3 f6 2. Nc3 Na6 3. Ng5 d6 4. Nf7 e6 5. Nb5 Nb8 6. Nxc7 a6 7. c4 Rb8 8. Qa4 b5 9. Qa5 Rb6 10. Nxh8 Kd8 11. c5 h6 12. e4 f5 13. d4 g5 14. Qd2 Kd7 15. Qe2 Kc8 16. Qh5 dxc5 17. Qe8 Kb7 - Oct 09 20:58 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 Na6 … 15. Qe2 Kc8 16. Qh5 dxc5 17. Qe8
1. Nf3 f6 2. Nc3 Na6 3. Ng5 d6 4. Nf7 e6 5. Nb5 Nb8 6. Nxc7 a6 7. c4 Rb8 8. Qa4 b5 9. Qa5 Rb6 10. Nxh8 Kd8 11. c5 h6 12. e4 f5 13. d4 g5 14. Qd2 Kd7 15. Qe2 Kc8 16. Qh5 dxc5 17. Qe8