80.4M
positions
15.5M
practically solved
290.65T
engine nodes
2.2M
analyses
3,319
in queue
3
active workers
22
active cores
4.9M
nodes / sec
7.2
positions / min
82
proof number
4,106
disproof number
Root conquest: 0/20 first moves solved · 19.3% of tree positions solved · last 24h: 299,516 closures, 4.60T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 over 219 open obligations, of which 41 (18.7%) 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 36) · measured at 2026-10-10 00:00 UTC
Closures by source, last 24h (299516 of 299516 labelled): USER 100.0% (299464) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.0% (52) · last 7d (1690958 of 1690958): USER 99.0% (1674158) · FILL 0.1% (2071) · AUTO 0.7% (11952) · SOLVE 0.0% (0) · NONE 0.2% (2777). 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. e4 e6 … e5 26. Kg2 Rf8 27. b4 Kh8 (User) · 512.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … Rf8 27. Kg2 Kh8 28. b4 Nd8 (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 | 1094 | 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 41.0% of the fleet | 1.89T | 12,733 |
| 2 | BManBJ 32.9% of the fleet | 1.51T | 9,667 |
| 3 | randomchampgamer 14.3% of the fleet | 659.01B | 4,875 |
| 4 | RickEdinson 9.5% of the fleet | 434.82B | 2,773 |
| 5 | MoNiKaMaDnEsS 2.3% of the fleet | 107.50B | 662 |
| 6 | soothdest <0.1% of the fleet | 8.0M | 17 |
6 accounts · 4.60T 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 | 44.56T | 311,341 |
| 3 | tenzink 14.7% 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 | 16.94T | 124,164 |
| 6 | RickEdinson 3.9% of the fleet | 11.25T | 74,988 |
| 7 | JackIV 3.5% of the fleet | 10.06T | 67,859 |
| 8 | Torom 3.2% of the fleet | 9.26T | 68,482 |
| 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 · 290.74T 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 10 00:51 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 22. f5 Kc7 23. g3 Bf2 24. Kg2
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. O-O axb5 8. h3 h5 9. Qd3 b5 10. Qc3 Qc7 11. Ne5 Ba6 12. Qa5 fxe5 13. Bf4 e5 14. Bg5 Bb4 15. Qb6 Nf6 16. f4 exd4 17. a4 Qa7 18. Qxa6 Be1 19. axb5 Ra5 20. Rxa5 g6 21. Bh6 Kd8 22. f5 Kc7 23. g3 Bf2 24. Kg2 - Oct 10 00:51 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 22. f5 Kc7 23. g3 Bf2 24. Kh2
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 a6 7. O-O axb5 8. h3 h5 9. Qd3 b5 10. Qc3 Qc7 11. Ne5 Ba6 12. Qa5 fxe5 13. Bf4 e5 14. Bg5 Bb4 15. Qb6 Nf6 16. f4 exd4 17. a4 Qa7 18. Qxa6 Be1 19. axb5 Ra5 20. Rxa5 g6 21. Bh6 Kd8 22. f5 Kc7 23. g3 Bf2 24. Kh2 - Oct 10 00:46 Solved: BLACK_WIN via MATE_PVview
1. e4 d6 2. Nh3 f5 … 14. Nc7 Kf8 15. h4 Nd3 16. Kd1
1. e4 d6 2. Nh3 f5 3. Bb5 c6 4. Ng5 e6 5. Nf7 Qd7 6. Bxc6 h5 7. d4 Nc6 8. Qe2 a6 9. Nc3 Nb4 10. Qf1 Be7 11. Nb5 f4 12. a3 g6 13. f3 Nf6 14. Nc7 Kf8 15. h4 Nd3 16. Kd1 - Oct 10 00:46 Solved: BLACK_WIN via MATE_PVview
1. e4 d6 2. Nh3 f5 … 14. Nc7 Kf8 15. h4 Nd3 16. Kd2
1. e4 d6 2. Nh3 f5 3. Bb5 c6 4. Ng5 e6 5. Nf7 Qd7 6. Bxc6 h5 7. d4 Nc6 8. Qe2 a6 9. Nc3 Nb4 10. Qf1 Be7 11. Nb5 f4 12. a3 g6 13. f3 Nf6 14. Nc7 Kf8 15. h4 Nd3 16. Kd2 - Oct 10 00:46 Solved: BLACK_WIN via MATE_PVview
1. e4 d6 2. Nh3 f5 … 15. h4 Nd3 16. Ke2 Ne1 17. Nxh8
1. e4 d6 2. Nh3 f5 3. Bb5 c6 4. Ng5 e6 5. Nf7 Qd7 6. Bxc6 h5 7. d4 Nc6 8. Qe2 a6 9. Nc3 Nb4 10. Qf1 Be7 11. Nb5 f4 12. a3 g6 13. f3 Nf6 14. Nc7 Kf8 15. h4 Nd3 16. Ke2 Ne1 17. Nxh8 - Oct 10 00:46 Solved: BLACK_WIN via MATE_PVview
1. e4 d6 2. Nh3 f5 … Kf8 15. h4 Nd3 16. Ke2 Ne1
1. e4 d6 2. Nh3 f5 3. Bb5 c6 4. Ng5 e6 5. Nf7 Qd7 6. Bxc6 h5 7. d4 Nc6 8. Qe2 a6 9. Nc3 Nb4 10. Qf1 Be7 11. Nb5 f4 12. a3 g6 13. f3 Nf6 14. Nc7 Kf8 15. h4 Nd3 16. Ke2 Ne1 - Oct 10 00:46 Solved: BLACK_WIN via MATE_PVview
1. e4 d6 2. Nh3 f5 … 14. Nc7 Kf8 15. h4 Nd3 16. Ke2
1. e4 d6 2. Nh3 f5 3. Bb5 c6 4. Ng5 e6 5. Nf7 Qd7 6. Bxc6 h5 7. d4 Nc6 8. Qe2 a6 9. Nc3 Nb4 10. Qf1 Be7 11. Nb5 f4 12. a3 g6 13. f3 Nf6 14. Nc7 Kf8 15. h4 Nd3 16. Ke2 - Oct 10 00:44 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nc3 a6 … Bh6 10. Ng5 Ne7 11. e5 dxe5
1. Nf3 f6 2. Nc3 a6 3. Ne5 d6 4. Nf7 Qd7 5. Nd5 e6 6. Nxc7 a5 7. e4 b5 8. c4 g6 9. cxb5 Bh6 10. Ng5 Ne7 11. e5 dxe5 - Oct 10 00:44 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 a6 … Nd6 17. Nxe6 Kf7 18. Qe7 Kg8
1. Nf3 f6 2. Nc3 a6 3. Ne5 d6 4. Nf7 Qd7 5. Nd5 e6 6. Nxc7 a5 7. e4 b5 8. c4 g6 9. cxb5 Bh6 10. Ng5 Ne7 11. e5 dxe5 12. Qb3 Rc8 13. Bb5 Kf8 14. Qa3 Rc5 15. d4 Nf5 16. dxc5 Nd6 17. Nxe6 Kf7 18. Qe7 Kg8 - Oct 10 00:44 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 a6 … 16. dxc5 Nd6 17. Nxe6 Kf7 18. Qe7
1. Nf3 f6 2. Nc3 a6 3. Ne5 d6 4. Nf7 Qd7 5. Nd5 e6 6. Nxc7 a5 7. e4 b5 8. c4 g6 9. cxb5 Bh6 10. Ng5 Ne7 11. e5 dxe5 12. Qb3 Rc8 13. Bb5 Kf8 14. Qa3 Rc5 15. d4 Nf5 16. dxc5 Nd6 17. Nxe6 Kf7 18. Qe7 - Oct 10 00:44 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 a6 … Nf5 16. dxc5 Nd6 17. Nxe6 Kf7
1. Nf3 f6 2. Nc3 a6 3. Ne5 d6 4. Nf7 Qd7 5. Nd5 e6 6. Nxc7 a5 7. e4 b5 8. c4 g6 9. cxb5 Bh6 10. Ng5 Ne7 11. e5 dxe5 12. Qb3 Rc8 13. Bb5 Kf8 14. Qa3 Rc5 15. d4 Nf5 16. dxc5 Nd6 17. Nxe6 Kf7 - Oct 10 00:44 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 a6 … 15. d4 Nf5 16. dxc5 Nd6 17. Nxe6
1. Nf3 f6 2. Nc3 a6 3. Ne5 d6 4. Nf7 Qd7 5. Nd5 e6 6. Nxc7 a5 7. e4 b5 8. c4 g6 9. cxb5 Bh6 10. Ng5 Ne7 11. e5 dxe5 12. Qb3 Rc8 13. Bb5 Kf8 14. Qa3 Rc5 15. d4 Nf5 16. dxc5 Nd6 17. Nxe6