57.5M
positions
9.3M
practically solved
207.79T
engine nodes
1.6M
analyses
4,938
in queue
19
active workers
129
active cores
18.7M
nodes / sec
44.2
positions / min
131
proof number
3,776
disproof number
Root conquest: 0/20 first moves solved · 16.3% of tree positions solved · last 24h: 449,826 closures, 5.70T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 74 over 165 open obligations, of which 29 (17.6%) 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 5.7m (median of 139) · measured at 2026-09-19 05:00 UTC
Closures by source, last 24h (449502 of 449585 labelled): USER 99.8% (448714) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.2% (788) · last 7d (1805891 of 1806080): USER 98.4% (1777275) · FILL 0.2% (3679) · AUTO 1.2% (21080) · SOLVE 0.0% (0) · NONE 0.2% (3857). 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 … 18. e4 Bb2 19. h4 Ne7 20. Bxg5 (User) · 128.0M nodes · auranvesdranor-admin-835912-atomicdb
- 1. Nh3 f6 2. Nc3 h6 3. Nd5 e6 4. e3 b5 5. a4 (User) · 128.0M nodes · auranvesdranor-j-002-atomicdb
- 1. Nh3 e6 2. e3 g6 … 18. e4 Bb2 19. h4 Ne7 20. Bxb2 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … b5 17. c5 Ra7 18. c6 h4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … b5 17. c5 Ra7 18. c6 Bxg5 (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 | 1101 | 2 | |
| g1h3 | unsolved | 801 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 435 | 2 | |
| e2e4 | unsolved | 414 | 2 | |
| b1c3 | unsolved | 71 | 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 23.1% of the fleet | 1.32T | 9,589 |
| 2 | auranvesdranor 22.9% of the fleet | 1.31T | 9,932 |
| 3 | Torom 19.1% of the fleet | 1.09T | 7,800 |
| 4 | JackIV 10.6% of the fleet | 606.16B | 3,276 |
| 5 | randomchampgamer 10.4% of the fleet | 592.88B | 4,412 |
| 6 | tenzink 9.6% of the fleet | 547.87B | 3,520 |
| 7 | MoNiKaMaDnEsS 2.8% of the fleet | 157.73B | 965 |
| 8 | quasa 1.4% of the fleet | 82.30B | 538 |
8 accounts · 5.70T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 38.3% of the fleet | 79.65T | 677,611 |
| 2 | tenzink 16.5% of the fleet | 34.22T | 290,828 |
| 3 | auranvesdranor 11.1% of the fleet | 23.00T | 165,142 |
| 4 | BManBJ 10.7% of the fleet | 22.32T | 151,453 |
| 5 | JackIV 4.1% of the fleet | 8.55T | 59,848 |
| 6 | randomchampgamer 3.6% of the fleet | 7.51T | 53,671 |
| 7 | RickEdinson 3.0% of the fleet | 6.32T | 41,667 |
| 8 | NeoArcturus 2.0% of the fleet | 4.09T | 16,751 |
| 9 | MoNiKaMaDnEsS 1.8% of the fleet | 3.84T | 24,377 |
| 10 | ijh 1.7% of the fleet | 3.57T | 37,348 |
and 22 more.
32 accounts · 207.95T 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 19 05:35 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … b5 17. c5 Ra7 18. c6 Rd7
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 Na6 10. b4 Nb8 11. h3 a5 12. b5 b6 13. O-O Bh6 14. Nxh8 cxb5 15. e5 Nc6 16. exd6 b5 17. c5 Ra7 18. c6 Rd7 - Sep 19 05:35 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Bxc7 25. Qe5 Kf8 26. Qh8 Bg8
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 Na6 10. b4 Nb8 11. h3 a5 12. b5 b6 13. O-O Bh6 14. Nxh8 cxb5 15. e5 Nc6 16. exd6 b5 17. c5 Ra7 18. c6 Rd7 19. g3 Rd5 20. Re1 Bf8 21. Rxe6 Be6 22. Qe1 Bb4 23. Nc3 Bd6 24. c7 Bxc7 25. Qe5 Kf8 26. Qh8 Bg8 - Sep 19 05:35 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 24. c7 Bxc7 25. Qe5 Kf8 26. Qh8
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 Na6 10. b4 Nb8 11. h3 a5 12. b5 b6 13. O-O Bh6 14. Nxh8 cxb5 15. e5 Nc6 16. exd6 b5 17. c5 Ra7 18. c6 Rd7 19. g3 Rd5 20. Re1 Bf8 21. Rxe6 Be6 22. Qe1 Bb4 23. Nc3 Bd6 24. c7 Bxc7 25. Qe5 Kf8 26. Qh8 - Sep 19 05:35 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Bd6 24. c7 Bxc7 25. Qe5 Kf8
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 Na6 10. b4 Nb8 11. h3 a5 12. b5 b6 13. O-O Bh6 14. Nxh8 cxb5 15. e5 Nc6 16. exd6 b5 17. c5 Ra7 18. c6 Rd7 19. g3 Rd5 20. Re1 Bf8 21. Rxe6 Be6 22. Qe1 Bb4 23. Nc3 Bd6 24. c7 Bxc7 25. Qe5 Kf8 - Sep 19 05:35 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 23. Nc3 Bd6 24. c7 Bxc7 25. Qe5
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 Na6 10. b4 Nb8 11. h3 a5 12. b5 b6 13. O-O Bh6 14. Nxh8 cxb5 15. e5 Nc6 16. exd6 b5 17. c5 Ra7 18. c6 Rd7 19. g3 Rd5 20. Re1 Bf8 21. Rxe6 Be6 22. Qe1 Bb4 23. Nc3 Bd6 24. c7 Bxc7 25. Qe5 - Sep 19 05:35 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Bb4 23. Nc3 Bd6 24. c7 Bxc7
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 Na6 10. b4 Nb8 11. h3 a5 12. b5 b6 13. O-O Bh6 14. Nxh8 cxb5 15. e5 Nc6 16. exd6 b5 17. c5 Ra7 18. c6 Rd7 19. g3 Rd5 20. Re1 Bf8 21. Rxe6 Be6 22. Qe1 Bb4 23. Nc3 Bd6 24. c7 Bxc7 - Sep 19 05:35 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 22. Qe1 Bb4 23. Nc3 Bd6 24. c7
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 Na6 10. b4 Nb8 11. h3 a5 12. b5 b6 13. O-O Bh6 14. Nxh8 cxb5 15. e5 Nc6 16. exd6 b5 17. c5 Ra7 18. c6 Rd7 19. g3 Rd5 20. Re1 Bf8 21. Rxe6 Be6 22. Qe1 Bb4 23. Nc3 Bd6 24. c7 - Sep 19 05:35 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Be6 22. Qe1 Bb4 23. Nc3 Bd6
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 Na6 10. b4 Nb8 11. h3 a5 12. b5 b6 13. O-O Bh6 14. Nxh8 cxb5 15. e5 Nc6 16. exd6 b5 17. c5 Ra7 18. c6 Rd7 19. g3 Rd5 20. Re1 Bf8 21. Rxe6 Be6 22. Qe1 Bb4 23. Nc3 Bd6 - Sep 19 05:35 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 21. Rxe6 Be6 22. Qe1 Bb4 23. Nc3
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 Na6 10. b4 Nb8 11. h3 a5 12. b5 b6 13. O-O Bh6 14. Nxh8 cxb5 15. e5 Nc6 16. exd6 b5 17. c5 Ra7 18. c6 Rd7 19. g3 Rd5 20. Re1 Bf8 21. Rxe6 Be6 22. Qe1 Bb4 23. Nc3 - Sep 19 05:35 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Bf8 21. Rxe6 Be6 22. Qe1 Bb4
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 Na6 10. b4 Nb8 11. h3 a5 12. b5 b6 13. O-O Bh6 14. Nxh8 cxb5 15. e5 Nc6 16. exd6 b5 17. c5 Ra7 18. c6 Rd7 19. g3 Rd5 20. Re1 Bf8 21. Rxe6 Be6 22. Qe1 Bb4 - Sep 19 05:35 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 20. Re1 Bf8 21. Rxe6 Be6 22. Qe1
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 Na6 10. b4 Nb8 11. h3 a5 12. b5 b6 13. O-O Bh6 14. Nxh8 cxb5 15. e5 Nc6 16. exd6 b5 17. c5 Ra7 18. c6 Rd7 19. g3 Rd5 20. Re1 Bf8 21. Rxe6 Be6 22. Qe1 - Sep 19 05:35 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Rd5 20. Re1 Bf8 21. Rxe6 Be6
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 Na6 10. b4 Nb8 11. h3 a5 12. b5 b6 13. O-O Bh6 14. Nxh8 cxb5 15. e5 Nc6 16. exd6 b5 17. c5 Ra7 18. c6 Rd7 19. g3 Rd5 20. Re1 Bf8 21. Rxe6 Be6