59.9M
positions
10.1M
practically solved
215.51T
engine nodes
1.7M
analyses
3,610
in queue
12
active workers
84
active cores
26.9M
nodes / sec
28.6
positions / min
131
proof number
3,777
disproof number
Root conquest: 0/20 first moves solved · 16.8% of tree positions solved · last 24h: 418,958 closures, 5.52T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 76 over 172 open obligations, of which 29 (16.9%) 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 17.1m (median of 176) · measured at 2026-09-20 13:00 UTC
Closures by source, last 24h (418944 of 418944 labelled): USER 99.9% (418495) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.1% (449) · last 7d (2332087 of 2332101): USER 99.7% (2326171) · FILL 0.1% (1561) · AUTO 0.0% (559) · SOLVE 0.0% (0) · NONE 0.2% (3796). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nh3 e6 2. e3 g6 … Nc2 25. Rab1 Ne1 26. Kh1 Kg7 (User) · 128.0M nodes · auranvesdranor-admin-835912-atomicdb
- 1. Nh3 f5 2. e3 e6 … 13. g3 Nh5 14. g4 Be7 15. Kf2 (User) · 128.0M nodes · auranvesdranor-j-002-atomicdb
- 1. Nh3 e6 2. e3 g6 … 14. Nf4 h5 15. h3 Ba3 16. Kg2 (User) · 512.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Rb8 15. O-O Be6 16. b3 Rb4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Rb8 15. O-O Be6 16. b3 Bc8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
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 | 1075 | 2 | |
| g1h3 | unsolved | 735 | 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 | BManBJ 27.4% of the fleet | 1.51T | 11,394 |
| 2 | auranvesdranor 23.3% of the fleet | 1.29T | 9,877 |
| 3 | JackIV 18.3% of the fleet | 1.01T | 5,137 |
| 4 | tenzink 11.2% of the fleet | 617.82B | 4,304 |
| 5 | randomchampgamer 9.2% of the fleet | 510.20B | 4,105 |
| 6 | Torom 8.4% of the fleet | 464.11B | 3,174 |
| 7 | MoNiKaMaDnEsS 2.2% of the fleet | 120.58B | 891 |
7 accounts · 5.52T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 36.9% of the fleet | 79.65T | 677,611 |
| 2 | tenzink 16.2% of the fleet | 35.05T | 296,542 |
| 3 | auranvesdranor 11.5% of the fleet | 24.87T | 179,449 |
| 4 | BManBJ 11.3% of the fleet | 24.37T | 166,787 |
| 5 | JackIV 4.6% of the fleet | 9.91T | 66,874 |
| 6 | randomchampgamer 3.8% of the fleet | 8.23T | 59,443 |
| 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 1.7% of the fleet | 3.57T | 37,348 |
and 22 more.
32 accounts · 215.67T 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 19 proposals · see every proposal
Milestones
- Sep 20 13:46 Solved: WHITE_WIN via MINIMAXview
1. Nh3 e6 2. e3 g6 … Nc2 25. Rab1 Ne1 26. Kh1 Kf6
1. Nh3 e6 2. e3 g6 3. Bb5 h6 4. Nc3 c6 5. Nd5 Qh4 6. g3 exd5 7. Ng5 f5 8. c3 Nf6 9. Ne6 Be7 10. Bc4 d5 11. Ng7 Kf7 12. h3 dxc4 13. d3 Qc4 14. b4 Qa6 15. Nxf5 Qa4 16. O-O Re8 17. Ba3 Bc5 18. b5 Be6 19. c4 Bd4 20. Bd6 Na6 21. f4 Bf5 22. a3 Qc2 23. Qxc2 Nb4 24. g4 Nc2 25. Rab1 Ne1 26. Kh1 Kf6 - Sep 20 13:46 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … Rb8 15. O-O Be6 16. b3 Rb7
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 f4 8. Nc3 Nf6 9. Nd8 Bg4 10. Qd2 g6 11. Nd5 Nxe4 12. Nxb7 Bh6 13. Qa5 O-O 14. f3 Rb8 15. O-O Be6 16. b3 Rb7 - Sep 20 13:46 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Rb7 17. Qd8 Kg7 18. Qf8 Kh7
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 f4 8. Nc3 Nf6 9. Nd8 Bg4 10. Qd2 g6 11. Nd5 Nxe4 12. Nxb7 Bh6 13. Qa5 O-O 14. f3 Rb8 15. O-O Be6 16. b3 Rb7 17. Qd8 Kg7 18. Qf8 Kh7 - Sep 20 13:46 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 16. b3 Rb7 17. Qd8 Kg7 18. Qf8
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 f4 8. Nc3 Nf6 9. Nd8 Bg4 10. Qd2 g6 11. Nd5 Nxe4 12. Nxb7 Bh6 13. Qa5 O-O 14. f3 Rb8 15. O-O Be6 16. b3 Rb7 17. Qd8 Kg7 18. Qf8 - Sep 20 13:46 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Be6 16. b3 Rb7 17. Qd8 Kg7
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 f4 8. Nc3 Nf6 9. Nd8 Bg4 10. Qd2 g6 11. Nd5 Nxe4 12. Nxb7 Bh6 13. Qa5 O-O 14. f3 Rb8 15. O-O Be6 16. b3 Rb7 17. Qd8 Kg7 - Sep 20 13:46 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 15. O-O Be6 16. b3 Rb7 17. Qd8
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 f4 8. Nc3 Nf6 9. Nd8 Bg4 10. Qd2 g6 11. Nd5 Nxe4 12. Nxb7 Bh6 13. Qa5 O-O 14. f3 Rb8 15. O-O Be6 16. b3 Rb7 17. Qd8 - Sep 20 13:46 Solved: WHITE_WIN via MINIMAXview
1. Nh3 e6 2. e3 g6 … Nc2 25. Rab1 Ne1 26. Kh1 Ke6
1. Nh3 e6 2. e3 g6 3. Bb5 h6 4. Nc3 c6 5. Nd5 Qh4 6. g3 exd5 7. Ng5 f5 8. c3 Nf6 9. Ne6 Be7 10. Bc4 d5 11. Ng7 Kf7 12. h3 dxc4 13. d3 Qc4 14. b4 Qa6 15. Nxf5 Qa4 16. O-O Re8 17. Ba3 Bc5 18. b5 Be6 19. c4 Bd4 20. Bd6 Na6 21. f4 Bf5 22. a3 Qc2 23. Qxc2 Nb4 24. g4 Nc2 25. Rab1 Ne1 26. Kh1 Ke6 - Sep 20 13:46 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nc3 d6 … Rd8 10. d4 Rc8 11. Be8 g5
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 Kg8 8. Bb5 Rc8 9. c3 Rd8 10. d4 Rc8 11. Be8 g5 - Sep 20 13:46 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … g5 12. Qh5 Kh8 13. Qg6 Be7
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 Kg8 8. Bb5 Rc8 9. c3 Rd8 10. d4 Rc8 11. Be8 g5 12. Qh5 Kh8 13. Qg6 Be7 - Sep 20 13:46 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 11. Be8 g5 12. Qh5 Kh8 13. Qg6
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 Kg8 8. Bb5 Rc8 9. c3 Rd8 10. d4 Rc8 11. Be8 g5 12. Qh5 Kh8 13. Qg6 - Sep 20 13:46 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … Rc8 11. Be8 g5 12. Qh5 Kh8
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 Kg8 8. Bb5 Rc8 9. c3 Rd8 10. d4 Rc8 11. Be8 g5 12. Qh5 Kh8 - Sep 20 13:46 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 10. d4 Rc8 11. Be8 g5 12. Qh5
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 Kg8 8. Bb5 Rc8 9. c3 Rd8 10. d4 Rc8 11. Be8 g5 12. Qh5