63.1M
positions
11.1M
practically solved
227.47T
engine nodes
1.8M
analyses
8,610
in queue
12
active workers
72
active cores
5.4M
nodes / sec
24.0
positions / min
125
proof number
3,794
disproof number
Root conquest: 0/20 first moves solved · 17.7% of tree positions solved · last 24h: 794,106 closures, 9.06T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 80 over 185 open obligations, of which 30 (16.2%) 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 7.2h (median of 234) · measured at 2026-09-26 17:00 UTC
Closures by source, last 24h (794099 of 794104 labelled): USER 96.3% (764728) · FILL 0.8% (6349) · AUTO 2.8% (21939) · SOLVE 0.0% (0) · NONE 0.1% (1083) · last 7d (1331259 of 1331259): USER 97.7% (1301264) · FILL 0.5% (6349) · AUTO 1.6% (21939) · SOLVE 0.0% (0) · NONE 0.1% (1707). 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 g6 … h5 11. Bd7 Rc5 12. dxc5 Ba3 (User) · 128.0M nodes · auranvesdranor-admin-835912-atomicdb
- 1. Nf3 f6 2. Nc3 g6 … Bb4 11. c3 Rc8 12. e4 e5 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 f6 2. Nc3 g6 … h5 11. Bd7 Rc6 12. Bd2 Bh6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 d6 3. Nd5 e5 4. Nxc7 e4 5. e3 O-O-O (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. Nc3 d6 3. Nd5 e5 4. Nxc7 b6 5. Nd4 Nh6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
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 | 1025 | 2 | |
| g1h3 | unsolved | 674 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| e2e4 | unsolved | 417 | 2 | |
| d2d4 | unsolved | 388 | 2 | |
| b1c3 | unsolved | 159 | 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 | -302 | 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 | NitroColoraze 84.9% of the fleet | 7.69T | 53,199 |
| 2 | BManBJ 5.4% of the fleet | 485.39B | 3,916 |
| 3 | tenzink 5.3% of the fleet | 481.27B | 3,248 |
| 4 | randomchampgamer 1.7% of the fleet | 150.58B | 1,243 |
| 5 | RickEdinson 1.6% of the fleet | 146.94B | 1,194 |
| 6 | MoNiKaMaDnEsS 0.7% of the fleet | 60.16B | 470 |
| 7 | auranvesdranor 0.5% of the fleet | 44.97B | 354 |
| 8 | Torom <0.1% of the fleet | 3.44B | 8 |
8 accounts · 9.06T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 39.1% of the fleet | 88.96T | 742,749 |
| 2 | tenzink 15.7% of the fleet | 35.71T | 301,058 |
| 3 | BManBJ 11.1% of the fleet | 25.35T | 174,159 |
| 4 | auranvesdranor 11.1% of the fleet | 25.18T | 181,889 |
| 5 | JackIV 4.4% of the fleet | 10.06T | 67,859 |
| 6 | randomchampgamer 3.7% of the fleet | 8.51T | 61,710 |
| 7 | RickEdinson 2.9% of the fleet | 6.50T | 43,070 |
| 8 | NeoArcturus 1.8% of the fleet | 4.09T | 16,756 |
| 9 | MoNiKaMaDnEsS 1.8% of the fleet | 4.02T | 25,738 |
| 10 | ijh 1.6% of the fleet | 3.57T | 37,348 |
and 22 more.
32 accounts · 227.64T 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 21 proposals · see every proposal
Milestones
- Sep 26 17:14 Solved: WHITE_WIN via MATE_PVview
1. g3 e6 2. e3 Qh4 … Nc3 31. Rb6 Ka7 32. Ra6 Kb7
1. g3 e6 2. e3 Qh4 3. Nc3 Qh5 4. Qf3 f5 5. Bb5 c6 6. Nd5 Nf6 7. c3 Bb4 8. Nc7 Kd8 9. Nxe6 d5 10. Qg4 d4 11. d3 Be7 12. exd4 Bf6 13. Be3 Be6 14. O-O-O f4 15. Qxh5 fxe3 16. Bc4 Bxc3 17. Nf3 Nd7 18. Ng5 Nc5 19. Nf7 Kc8 20. Rde1 b5 21. Nd6 Kd8 22. b3 a5 23. Re5 a4 24. Nf7 Kc8 25. Rd5 Kb7 26. Rd6 Ka6 27. Nxh8 b4 28. Rd8 axb3 29. f4 Na4 30. Rb8 Nc3 31. Rb6 Ka7 32. Ra6 Kb7 - Sep 26 17:14 Solved: WHITE_WIN via MATE_PVview
1. g3 e6 2. e3 Qh4 … 30. Rb8 Nc3 31. Rb6 Ka7 32. Ra6
1. g3 e6 2. e3 Qh4 3. Nc3 Qh5 4. Qf3 f5 5. Bb5 c6 6. Nd5 Nf6 7. c3 Bb4 8. Nc7 Kd8 9. Nxe6 d5 10. Qg4 d4 11. d3 Be7 12. exd4 Bf6 13. Be3 Be6 14. O-O-O f4 15. Qxh5 fxe3 16. Bc4 Bxc3 17. Nf3 Nd7 18. Ng5 Nc5 19. Nf7 Kc8 20. Rde1 b5 21. Nd6 Kd8 22. b3 a5 23. Re5 a4 24. Nf7 Kc8 25. Rd5 Kb7 26. Rd6 Ka6 27. Nxh8 b4 28. Rd8 axb3 29. f4 Na4 30. Rb8 Nc3 31. Rb6 Ka7 32. Ra6 - Sep 26 17:14 Solved: WHITE_WIN via MATE_PVview
1. g3 e6 2. e3 Qh4 … Na4 30. Rb8 Nc3 31. Rb6 Ka7
1. g3 e6 2. e3 Qh4 3. Nc3 Qh5 4. Qf3 f5 5. Bb5 c6 6. Nd5 Nf6 7. c3 Bb4 8. Nc7 Kd8 9. Nxe6 d5 10. Qg4 d4 11. d3 Be7 12. exd4 Bf6 13. Be3 Be6 14. O-O-O f4 15. Qxh5 fxe3 16. Bc4 Bxc3 17. Nf3 Nd7 18. Ng5 Nc5 19. Nf7 Kc8 20. Rde1 b5 21. Nd6 Kd8 22. b3 a5 23. Re5 a4 24. Nf7 Kc8 25. Rd5 Kb7 26. Rd6 Ka6 27. Nxh8 b4 28. Rd8 axb3 29. f4 Na4 30. Rb8 Nc3 31. Rb6 Ka7 - Sep 26 17:14 Solved: WHITE_WIN via MATE_PVview
1. g3 e6 2. e3 Qh4 … 29. f4 Na4 30. Rb8 Nc3 31. Rb6
1. g3 e6 2. e3 Qh4 3. Nc3 Qh5 4. Qf3 f5 5. Bb5 c6 6. Nd5 Nf6 7. c3 Bb4 8. Nc7 Kd8 9. Nxe6 d5 10. Qg4 d4 11. d3 Be7 12. exd4 Bf6 13. Be3 Be6 14. O-O-O f4 15. Qxh5 fxe3 16. Bc4 Bxc3 17. Nf3 Nd7 18. Ng5 Nc5 19. Nf7 Kc8 20. Rde1 b5 21. Nd6 Kd8 22. b3 a5 23. Re5 a4 24. Nf7 Kc8 25. Rd5 Kb7 26. Rd6 Ka6 27. Nxh8 b4 28. Rd8 axb3 29. f4 Na4 30. Rb8 Nc3 31. Rb6 - Sep 26 17:14 Solved: WHITE_WIN via MATE_PVview
1. g3 e6 2. e3 Qh4 … axb3 29. f4 Na4 30. Rb8 Nc3
1. g3 e6 2. e3 Qh4 3. Nc3 Qh5 4. Qf3 f5 5. Bb5 c6 6. Nd5 Nf6 7. c3 Bb4 8. Nc7 Kd8 9. Nxe6 d5 10. Qg4 d4 11. d3 Be7 12. exd4 Bf6 13. Be3 Be6 14. O-O-O f4 15. Qxh5 fxe3 16. Bc4 Bxc3 17. Nf3 Nd7 18. Ng5 Nc5 19. Nf7 Kc8 20. Rde1 b5 21. Nd6 Kd8 22. b3 a5 23. Re5 a4 24. Nf7 Kc8 25. Rd5 Kb7 26. Rd6 Ka6 27. Nxh8 b4 28. Rd8 axb3 29. f4 Na4 30. Rb8 Nc3 - Sep 26 17:14 Solved: WHITE_WIN via MATE_PVview
1. g3 e6 2. e3 Qh4 … c5 31. Rb6 Ka7 32. Ra6 Kb7
1. g3 e6 2. e3 Qh4 3. Nc3 Qh5 4. Qf3 f5 5. Bb5 c6 6. Nd5 Nf6 7. c3 Bb4 8. Nc7 Kd8 9. Nxe6 d5 10. Qg4 d4 11. d3 Be7 12. exd4 Bf6 13. Be3 Be6 14. O-O-O f4 15. Qxh5 fxe3 16. Bc4 Bxc3 17. Nf3 Nd7 18. Ng5 Nc5 19. Nf7 Kc8 20. Rde1 b5 21. Nd6 Kd8 22. b3 a5 23. Re5 a4 24. Nf7 Kc8 25. Rd5 Kb7 26. Rd6 Ka6 27. Nxh8 b4 28. Rd8 axb3 29. f4 Na4 30. Rb8 c5 31. Rb6 Ka7 32. Ra6 Kb7 - Sep 26 17:14 Solved: WHITE_WIN via MATE_PVview
1. g3 e6 2. e3 Qh4 … 30. Rb8 c5 31. Rb6 Ka7 32. Ra6
1. g3 e6 2. e3 Qh4 3. Nc3 Qh5 4. Qf3 f5 5. Bb5 c6 6. Nd5 Nf6 7. c3 Bb4 8. Nc7 Kd8 9. Nxe6 d5 10. Qg4 d4 11. d3 Be7 12. exd4 Bf6 13. Be3 Be6 14. O-O-O f4 15. Qxh5 fxe3 16. Bc4 Bxc3 17. Nf3 Nd7 18. Ng5 Nc5 19. Nf7 Kc8 20. Rde1 b5 21. Nd6 Kd8 22. b3 a5 23. Re5 a4 24. Nf7 Kc8 25. Rd5 Kb7 26. Rd6 Ka6 27. Nxh8 b4 28. Rd8 axb3 29. f4 Na4 30. Rb8 c5 31. Rb6 Ka7 32. Ra6 - Sep 26 17:14 Solved: WHITE_WIN via MATE_PVview
1. g3 e6 2. e3 Qh4 … Na4 30. Rb8 c5 31. Rb6 Ka7
1. g3 e6 2. e3 Qh4 3. Nc3 Qh5 4. Qf3 f5 5. Bb5 c6 6. Nd5 Nf6 7. c3 Bb4 8. Nc7 Kd8 9. Nxe6 d5 10. Qg4 d4 11. d3 Be7 12. exd4 Bf6 13. Be3 Be6 14. O-O-O f4 15. Qxh5 fxe3 16. Bc4 Bxc3 17. Nf3 Nd7 18. Ng5 Nc5 19. Nf7 Kc8 20. Rde1 b5 21. Nd6 Kd8 22. b3 a5 23. Re5 a4 24. Nf7 Kc8 25. Rd5 Kb7 26. Rd6 Ka6 27. Nxh8 b4 28. Rd8 axb3 29. f4 Na4 30. Rb8 c5 31. Rb6 Ka7 - Sep 26 17:14 Solved: WHITE_WIN via MATE_PVview
1. g3 e6 2. e3 Qh4 … 29. f4 Na4 30. Rb8 c5 31. Rb6
1. g3 e6 2. e3 Qh4 3. Nc3 Qh5 4. Qf3 f5 5. Bb5 c6 6. Nd5 Nf6 7. c3 Bb4 8. Nc7 Kd8 9. Nxe6 d5 10. Qg4 d4 11. d3 Be7 12. exd4 Bf6 13. Be3 Be6 14. O-O-O f4 15. Qxh5 fxe3 16. Bc4 Bxc3 17. Nf3 Nd7 18. Ng5 Nc5 19. Nf7 Kc8 20. Rde1 b5 21. Nd6 Kd8 22. b3 a5 23. Re5 a4 24. Nf7 Kc8 25. Rd5 Kb7 26. Rd6 Ka6 27. Nxh8 b4 28. Rd8 axb3 29. f4 Na4 30. Rb8 c5 31. Rb6 - Sep 26 17:14 Solved: WHITE_WIN via MATE_PVview
1. g3 e6 2. e3 Qh4 … axb3 29. f4 Na4 30. Rb8 c5
1. g3 e6 2. e3 Qh4 3. Nc3 Qh5 4. Qf3 f5 5. Bb5 c6 6. Nd5 Nf6 7. c3 Bb4 8. Nc7 Kd8 9. Nxe6 d5 10. Qg4 d4 11. d3 Be7 12. exd4 Bf6 13. Be3 Be6 14. O-O-O f4 15. Qxh5 fxe3 16. Bc4 Bxc3 17. Nf3 Nd7 18. Ng5 Nc5 19. Nf7 Kc8 20. Rde1 b5 21. Nd6 Kd8 22. b3 a5 23. Re5 a4 24. Nf7 Kc8 25. Rd5 Kb7 26. Rd6 Ka6 27. Nxh8 b4 28. Rd8 axb3 29. f4 Na4 30. Rb8 c5 - Sep 26 17:14 Solved: WHITE_WIN via MATE_PVview
1. g3 e6 2. e3 Qh4 … b3 31. Rb6 Ka5 32. Ra6 Kb4
1. g3 e6 2. e3 Qh4 3. Nc3 Qh5 4. Qf3 f5 5. Bb5 c6 6. Nd5 Nf6 7. c3 Bb4 8. Nc7 Kd8 9. Nxe6 d5 10. Qg4 d4 11. d3 Be7 12. exd4 Bf6 13. Be3 Be6 14. O-O-O f4 15. Qxh5 fxe3 16. Bc4 Bxc3 17. Nf3 Nd7 18. Ng5 Nc5 19. Nf7 Kc8 20. Rde1 b5 21. Nd6 Kd8 22. b3 a5 23. Re5 a4 24. Nf7 Kc8 25. Rd5 Kb7 26. Rd6 Ka6 27. Nxh8 b4 28. Rd8 axb3 29. f4 Na4 30. Rb8 b3 31. Rb6 Ka5 32. Ra6 Kb4 - Sep 26 17:14 Solved: WHITE_WIN via MATE_PVview
1. g3 e6 2. e3 Qh4 … 30. Rb8 b3 31. Rb6 Ka5 32. Ra6
1. g3 e6 2. e3 Qh4 3. Nc3 Qh5 4. Qf3 f5 5. Bb5 c6 6. Nd5 Nf6 7. c3 Bb4 8. Nc7 Kd8 9. Nxe6 d5 10. Qg4 d4 11. d3 Be7 12. exd4 Bf6 13. Be3 Be6 14. O-O-O f4 15. Qxh5 fxe3 16. Bc4 Bxc3 17. Nf3 Nd7 18. Ng5 Nc5 19. Nf7 Kc8 20. Rde1 b5 21. Nd6 Kd8 22. b3 a5 23. Re5 a4 24. Nf7 Kc8 25. Rd5 Kb7 26. Rd6 Ka6 27. Nxh8 b4 28. Rd8 axb3 29. f4 Na4 30. Rb8 b3 31. Rb6 Ka5 32. Ra6