54.1M
positions
8.4M
practically solved
196.27T
engine nodes
1.6M
analyses
5,532
in queue
9
active workers
66
active cores
4.8M
nodes / sec
19.9
positions / min
131
proof number
3,716
disproof number
Root conquest: 0/20 first moves solved · 15.5% of tree positions solved · last 24h: 342,396 closures, 4.40T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 72 over 164 open obligations, of which 29 (17.7%) 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 12.9m (median of 160) · measured at 2026-09-17 03:00 UTC
Closures by source, last 24h (342340 of 342355 labelled): USER 99.8% (341689) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.2% (651) · last 7d (1287446 of 1287470): USER 91.9% (1183637) · FILL 1.1% (14696) · AUTO 6.6% (85120) · SOLVE 0.0% (0) · NONE 0.3% (3993). 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 … 25. e4 d5 26. d4 g5 27. Kh1 (User) · 128.0M nodes · auranvesdranor-admin-835912-atomicdb
- 1. Nh3 e6 2. e3 g6 … 25. e4 d5 26. d4 g5 27. Kf2 (User) · 128.0M nodes · auranvesdranor-j-002-atomicdb
- 1. Nh3 e6 2. e3 g6 … 25. e4 d5 26. d4 g5 27. Kh2 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Nb4 12. Qf3 Kf7 13. a3 b6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Nb4 12. Qf3 Kd8 13. a3 b6 (User) · 128.0M nodes · BManBJ-Laptop-Blake-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 | 1079 | 2 | |
| g1h3 | unsolved | 820 | 2 | |
| e2e3 | unsolved | 502 | 3 | |
| e2e4 | unsolved | 409 | 2 | |
| d2d4 | unsolved | 408 | 2 | |
| b1c3 | unsolved | 74 | 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 | auranvesdranor 32.4% of the fleet | 1.43T | 10,997 |
| 2 | BManBJ 31.5% of the fleet | 1.39T | 10,792 |
| 3 | tenzink 14.1% of the fleet | 620.80B | 3,714 |
| 4 | randomchampgamer 13.1% of the fleet | 577.40B | 4,528 |
| 5 | MoNiKaMaDnEsS 7.0% of the fleet | 306.94B | 1,943 |
| 6 | NeoArcturus 1.9% of the fleet | 85.13B | 244 |
6 accounts · 4.40T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 40.6% of the fleet | 79.65T | 677,611 |
| 2 | tenzink 16.8% of the fleet | 32.97T | 283,327 |
| 3 | auranvesdranor 10.2% of the fleet | 20.07T | 142,881 |
| 4 | BManBJ 9.9% of the fleet | 19.47T | 130,138 |
| 5 | JackIV 4.0% of the fleet | 7.94T | 56,572 |
| 6 | RickEdinson 3.2% of the fleet | 6.32T | 41,667 |
| 7 | randomchampgamer 3.2% of the fleet | 6.26T | 44,042 |
| 8 | NeoArcturus 2.1% of the fleet | 4.09T | 16,751 |
| 9 | ijh 1.8% of the fleet | 3.57T | 37,348 |
| 10 | MoNiKaMaDnEsS 1.8% of the fleet | 3.45T | 21,978 |
and 22 more.
32 accounts · 196.29T 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 · 15 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 18 proposals · see every proposal
Milestones
- Sep 17 03:12 Solved: BLACK_WIN via MINIMAXview
1. Nh3 e6 2. e3 g6 … 25. e4 d5 26. d4 g5 27. Rf1
1. Nh3 e6 2. e3 g6 3. Bb5 c6 4. Qh5 h6 5. Nc3 Bb4 6. Qe5 Qh4 7. g3 Qf4 8. f3 Qxe5 9. O-O a5 10. Ba6 bxa6 11. Nb5 Kf8 12. c3 Na6 13. Nc7 Rb8 14. b3 Ba3 15. Bxa3 Nc5 16. d3 Na4 17. Nb5 f5 18. Nd6 Ba6 19. Nc8 Nb2 20. Ne7 Nf6 21. Ng5 hxg5 22. h4 Nc4 23. Rfe1 Nd2 24. a4 e5 25. e4 d5 26. d4 g5 27. Rf1 - Sep 17 03:12 Solved: BLACK_WIN via MATE_PVview
1. Nh3 e6 2. e3 g6 … 29. f4 Nf3 30. Kf2 Rh2 31. Ke3
1. Nh3 e6 2. e3 g6 3. Bb5 c6 4. Qh5 h6 5. Nc3 Bb4 6. Qe5 Qh4 7. g3 Qf4 8. f3 Qxe5 9. O-O a5 10. Ba6 bxa6 11. Nb5 Kf8 12. c3 Na6 13. Nc7 Rb8 14. b3 Ba3 15. Bxa3 Nc5 16. d3 Na4 17. Nb5 f5 18. Nd6 Ba6 19. Nc8 Nb2 20. Ne7 Nf6 21. Ng5 hxg5 22. h4 Nc4 23. Rfe1 Nd2 24. a4 e5 25. e4 d5 26. d4 g5 27. Rf1 Kf7 28. Rfd1 gxh4 29. f4 Nf3 30. Kf2 Rh2 31. Ke3 - Sep 17 03:12 Solved: BLACK_WIN via MATE_PVview
1. Nh3 e6 2. e3 g6 … gxh4 29. f4 Nf3 30. Kf2 Rh2
1. Nh3 e6 2. e3 g6 3. Bb5 c6 4. Qh5 h6 5. Nc3 Bb4 6. Qe5 Qh4 7. g3 Qf4 8. f3 Qxe5 9. O-O a5 10. Ba6 bxa6 11. Nb5 Kf8 12. c3 Na6 13. Nc7 Rb8 14. b3 Ba3 15. Bxa3 Nc5 16. d3 Na4 17. Nb5 f5 18. Nd6 Ba6 19. Nc8 Nb2 20. Ne7 Nf6 21. Ng5 hxg5 22. h4 Nc4 23. Rfe1 Nd2 24. a4 e5 25. e4 d5 26. d4 g5 27. Rf1 Kf7 28. Rfd1 gxh4 29. f4 Nf3 30. Kf2 Rh2 - Sep 17 03:12 Solved: BLACK_WIN via MATE_PVview
1. Nh3 e6 2. e3 g6 … 28. Rfd1 gxh4 29. f4 Nf3 30. Kf2
1. Nh3 e6 2. e3 g6 3. Bb5 c6 4. Qh5 h6 5. Nc3 Bb4 6. Qe5 Qh4 7. g3 Qf4 8. f3 Qxe5 9. O-O a5 10. Ba6 bxa6 11. Nb5 Kf8 12. c3 Na6 13. Nc7 Rb8 14. b3 Ba3 15. Bxa3 Nc5 16. d3 Na4 17. Nb5 f5 18. Nd6 Ba6 19. Nc8 Nb2 20. Ne7 Nf6 21. Ng5 hxg5 22. h4 Nc4 23. Rfe1 Nd2 24. a4 e5 25. e4 d5 26. d4 g5 27. Rf1 Kf7 28. Rfd1 gxh4 29. f4 Nf3 30. Kf2 - Sep 17 03:12 Solved: BLACK_WIN via MATE_PVview
1. Nh3 e6 2. e3 g6 … Kf7 28. Rfd1 gxh4 29. f4 Nf3
1. Nh3 e6 2. e3 g6 3. Bb5 c6 4. Qh5 h6 5. Nc3 Bb4 6. Qe5 Qh4 7. g3 Qf4 8. f3 Qxe5 9. O-O a5 10. Ba6 bxa6 11. Nb5 Kf8 12. c3 Na6 13. Nc7 Rb8 14. b3 Ba3 15. Bxa3 Nc5 16. d3 Na4 17. Nb5 f5 18. Nd6 Ba6 19. Nc8 Nb2 20. Ne7 Nf6 21. Ng5 hxg5 22. h4 Nc4 23. Rfe1 Nd2 24. a4 e5 25. e4 d5 26. d4 g5 27. Rf1 Kf7 28. Rfd1 gxh4 29. f4 Nf3 - Sep 17 03:12 Solved: BLACK_WIN via MATE_PVview
1. Nh3 e6 2. e3 g6 … 27. Rf1 Kf7 28. Rfd1 gxh4 29. f4
1. Nh3 e6 2. e3 g6 3. Bb5 c6 4. Qh5 h6 5. Nc3 Bb4 6. Qe5 Qh4 7. g3 Qf4 8. f3 Qxe5 9. O-O a5 10. Ba6 bxa6 11. Nb5 Kf8 12. c3 Na6 13. Nc7 Rb8 14. b3 Ba3 15. Bxa3 Nc5 16. d3 Na4 17. Nb5 f5 18. Nd6 Ba6 19. Nc8 Nb2 20. Ne7 Nf6 21. Ng5 hxg5 22. h4 Nc4 23. Rfe1 Nd2 24. a4 e5 25. e4 d5 26. d4 g5 27. Rf1 Kf7 28. Rfd1 gxh4 29. f4 - Sep 17 03:12 Solved: BLACK_WIN via MATE_PVview
1. Nh3 e6 2. e3 g6 … g5 27. Rf1 Kf7 28. Rfd1 gxh4
1. Nh3 e6 2. e3 g6 3. Bb5 c6 4. Qh5 h6 5. Nc3 Bb4 6. Qe5 Qh4 7. g3 Qf4 8. f3 Qxe5 9. O-O a5 10. Ba6 bxa6 11. Nb5 Kf8 12. c3 Na6 13. Nc7 Rb8 14. b3 Ba3 15. Bxa3 Nc5 16. d3 Na4 17. Nb5 f5 18. Nd6 Ba6 19. Nc8 Nb2 20. Ne7 Nf6 21. Ng5 hxg5 22. h4 Nc4 23. Rfe1 Nd2 24. a4 e5 25. e4 d5 26. d4 g5 27. Rf1 Kf7 28. Rfd1 gxh4 - Sep 17 03:12 Solved: BLACK_WIN via MATE_PVview
1. Nh3 e6 2. e3 g6 … 26. d4 g5 27. Rf1 Kf7 28. Rfd1
1. Nh3 e6 2. e3 g6 3. Bb5 c6 4. Qh5 h6 5. Nc3 Bb4 6. Qe5 Qh4 7. g3 Qf4 8. f3 Qxe5 9. O-O a5 10. Ba6 bxa6 11. Nb5 Kf8 12. c3 Na6 13. Nc7 Rb8 14. b3 Ba3 15. Bxa3 Nc5 16. d3 Na4 17. Nb5 f5 18. Nd6 Ba6 19. Nc8 Nb2 20. Ne7 Nf6 21. Ng5 hxg5 22. h4 Nc4 23. Rfe1 Nd2 24. a4 e5 25. e4 d5 26. d4 g5 27. Rf1 Kf7 28. Rfd1 - Sep 17 03:12 Solved: BLACK_WIN via MATE_PVview
1. Nh3 e6 2. e3 g6 … d5 26. d4 g5 27. Rf1 Kf7
1. Nh3 e6 2. e3 g6 3. Bb5 c6 4. Qh5 h6 5. Nc3 Bb4 6. Qe5 Qh4 7. g3 Qf4 8. f3 Qxe5 9. O-O a5 10. Ba6 bxa6 11. Nb5 Kf8 12. c3 Na6 13. Nc7 Rb8 14. b3 Ba3 15. Bxa3 Nc5 16. d3 Na4 17. Nb5 f5 18. Nd6 Ba6 19. Nc8 Nb2 20. Ne7 Nf6 21. Ng5 hxg5 22. h4 Nc4 23. Rfe1 Nd2 24. a4 e5 25. e4 d5 26. d4 g5 27. Rf1 Kf7 - Sep 17 03:12 Solved: BLACK_WIN via MATE_PVview
1. Nh3 e6 2. e3 g6 … 29. f4 Nf3 30. Kf2 Rh2 31. Ke3
1. Nh3 e6 2. e3 g6 3. Bb5 c6 4. Qh5 h6 5. Nc3 Bb4 6. Qe5 Qh4 7. g3 Qf4 8. f3 Qxe5 9. O-O a5 10. Ba6 bxa6 11. Nb5 Kf8 12. c3 Na6 13. Nc7 Rb8 14. b3 Ba3 15. Bxa3 Nc5 16. d3 Na4 17. Nb5 f5 18. Nd6 Ba6 19. Nc8 Nb2 20. Ne7 Nf6 21. Ng5 hxg5 22. h4 Nc4 23. Rfe1 Nd2 24. a4 e5 25. e4 d5 26. d4 g5 27. Rf1 Ke8 28. Rfd1 gxh4 29. f4 Nf3 30. Kf2 Rh2 31. Ke3 - Sep 17 03:12 Solved: BLACK_WIN via MATE_PVview
1. Nh3 e6 2. e3 g6 … gxh4 29. f4 Nf3 30. Kf2 Rh2
1. Nh3 e6 2. e3 g6 3. Bb5 c6 4. Qh5 h6 5. Nc3 Bb4 6. Qe5 Qh4 7. g3 Qf4 8. f3 Qxe5 9. O-O a5 10. Ba6 bxa6 11. Nb5 Kf8 12. c3 Na6 13. Nc7 Rb8 14. b3 Ba3 15. Bxa3 Nc5 16. d3 Na4 17. Nb5 f5 18. Nd6 Ba6 19. Nc8 Nb2 20. Ne7 Nf6 21. Ng5 hxg5 22. h4 Nc4 23. Rfe1 Nd2 24. a4 e5 25. e4 d5 26. d4 g5 27. Rf1 Ke8 28. Rfd1 gxh4 29. f4 Nf3 30. Kf2 Rh2 - Sep 17 03:12 Solved: BLACK_WIN via MATE_PVview
1. Nh3 e6 2. e3 g6 … 28. Rfd1 gxh4 29. f4 Nf3 30. Kf2
1. Nh3 e6 2. e3 g6 3. Bb5 c6 4. Qh5 h6 5. Nc3 Bb4 6. Qe5 Qh4 7. g3 Qf4 8. f3 Qxe5 9. O-O a5 10. Ba6 bxa6 11. Nb5 Kf8 12. c3 Na6 13. Nc7 Rb8 14. b3 Ba3 15. Bxa3 Nc5 16. d3 Na4 17. Nb5 f5 18. Nd6 Ba6 19. Nc8 Nb2 20. Ne7 Nf6 21. Ng5 hxg5 22. h4 Nc4 23. Rfe1 Nd2 24. a4 e5 25. e4 d5 26. d4 g5 27. Rf1 Ke8 28. Rfd1 gxh4 29. f4 Nf3 30. Kf2