75.7M
positions
14.2M
practically solved
271.98T
engine nodes
2.1M
analyses
198
in queue
9
active workers
48
active cores
39.2M
nodes / sec
3.0
positions / min
82
proof number
3,796
disproof number
Root conquest: 0/20 first moves solved · 18.7% of tree positions solved · last 24h: 213,365 closures, 3.44T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 67 over 216 open obligations, of which 42 (19.4%) 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 44s (median of 110) · measured at 2026-10-05 22:00 UTC
Closures by source, last 24h (213353 of 213362 labelled): USER 99.8% (212844) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.2% (509) · last 7d (2121558 of 2121558): USER 99.8% (2116655) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.2% (4903). 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 … 25. Rxh2 Ba6 26. c4 Rf8 27. Rf1 (User) · 512.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … 23. d5 Bc1 24. b4 Kd6 25. a3 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. e4 e6 … 24. d5 Kd6 25. Rxh2 Bb7 26. Rf1 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. Nc3 c6 … Nc6 6. d4 a6 7. c3 Bd6 (User) · 10.00B nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 c6 … 5. Bb5 Nc6 6. d4 a6 7. h3 (User) · 10.00B 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 | 1026 | 2 | |
| g1h3 | unsolved | 820 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 441 | 2 | |
| e2e4 | unsolved | 418 | 2 | |
| b1c3 | unsolved | 105 | 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 | BManBJ 38.9% of the fleet | 1.34T | 8,381 |
| 2 | tenzink 20.3% of the fleet | 699.87B | 4,334 |
| 3 | randomchampgamer 19.3% of the fleet | 662.79B | 4,191 |
| 4 | RickEdinson 14.2% of the fleet | 489.21B | 3,056 |
| 5 | MoNiKaMaDnEsS 7.1% of the fleet | 244.44B | 1,634 |
| 6 | quasa 0.1% of the fleet | 3.35B | 27 |
| 7 | soothdest <0.1% of the fleet | 474.8M | 26 |
7 accounts · 3.44T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 33.2% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.3% of the fleet | 41.50T | 340,704 |
| 3 | BManBJ 14.1% of the fleet | 38.33T | 270,076 |
| 4 | auranvesdranor 11.5% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 5.3% of the fleet | 14.29T | 105,627 |
| 6 | JackIV 3.7% of the fleet | 10.06T | 67,859 |
| 7 | RickEdinson 3.5% of the fleet | 9.42T | 63,177 |
| 8 | gannet 2.7% of the fleet | 7.24T | 46,848 |
| 9 | MoNiKaMaDnEsS 2.0% of the fleet | 5.55T | 37,156 |
| 10 | NeoArcturus 1.5% of the fleet | 4.09T | 16,758 |
and 25 more.
35 accounts · 272.08T 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 21 proposals · see every proposal
Milestones
- Oct 05 22:48 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Ke5 27. Re1 Kd6 28. Re6 Kc5
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 h5 7. c3 Nh6 8. Ne5 fxe5 9. Bg5 Qf6 10. f4 Ng4 11. f5 Qxg5 12. Qxh5 g5 13. h3 Bg7 14. fxe6 g4 15. Rf1 Bf6 16. O-O-O gxh3 17. e5 Bg5 18. Kb1 Bf4 19. g3 Bc1 20. b3 Rh2 21. Rf2 d5 22. exd6 Ke7 23. Bd7 b6 24. d5 Kd6 25. Rxh2 Ba6 26. c4 Ke5 27. Re1 Kd6 28. Re6 Kc5 - Oct 05 22:48 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 26. c4 Ke5 27. Re1 Kd6 28. Re6
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 h5 7. c3 Nh6 8. Ne5 fxe5 9. Bg5 Qf6 10. f4 Ng4 11. f5 Qxg5 12. Qxh5 g5 13. h3 Bg7 14. fxe6 g4 15. Rf1 Bf6 16. O-O-O gxh3 17. e5 Bg5 18. Kb1 Bf4 19. g3 Bc1 20. b3 Rh2 21. Rf2 d5 22. exd6 Ke7 23. Bd7 b6 24. d5 Kd6 25. Rxh2 Ba6 26. c4 Ke5 27. Re1 Kd6 28. Re6 - Oct 05 22:48 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Ba6 26. c4 Ke5 27. Re1 Kd6
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 h5 7. c3 Nh6 8. Ne5 fxe5 9. Bg5 Qf6 10. f4 Ng4 11. f5 Qxg5 12. Qxh5 g5 13. h3 Bg7 14. fxe6 g4 15. Rf1 Bf6 16. O-O-O gxh3 17. e5 Bg5 18. Kb1 Bf4 19. g3 Bc1 20. b3 Rh2 21. Rf2 d5 22. exd6 Ke7 23. Bd7 b6 24. d5 Kd6 25. Rxh2 Ba6 26. c4 Ke5 27. Re1 Kd6 - Oct 05 22:47 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. e4 e6 … Bc1 24. b4 Kd6 25. a3 Rg2
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 h5 7. c3 Nh6 8. Ne5 fxe5 9. Bg5 Qf6 10. f4 Ng4 11. f5 Qxg5 12. Qxh5 g5 13. h3 Bg7 14. fxe6 g4 15. Rf1 Bf6 16. O-O-O gxh3 17. e5 Bg5 18. Kb1 Bf4 19. g3 Rh2 20. Rf2 d5 21. exd6 Ke7 22. Bd7 b6 23. d5 Bc1 24. b4 Kd6 25. a3 Rg2 - Oct 05 22:47 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Rg1 28. Rf1 Rh1 29. Re6 Kc7
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 h5 7. c3 Nh6 8. Ne5 fxe5 9. Bg5 Qf6 10. f4 Ng4 11. f5 Qxg5 12. Qxh5 g5 13. h3 Bg7 14. fxe6 g4 15. Rf1 Bf6 16. O-O-O gxh3 17. e5 Bg5 18. Kb1 Bf4 19. g3 Rh2 20. Rf2 d5 21. exd6 Ke7 22. Bd7 b6 23. d5 Bc1 24. b4 Kd6 25. a3 Rg2 26. Rd4 Bf4 27. Re4 Rg1 28. Rf1 Rh1 29. Re6 Kc7 - Oct 05 22:47 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 27. Re4 Rg1 28. Rf1 Rh1 29. Re6
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 h5 7. c3 Nh6 8. Ne5 fxe5 9. Bg5 Qf6 10. f4 Ng4 11. f5 Qxg5 12. Qxh5 g5 13. h3 Bg7 14. fxe6 g4 15. Rf1 Bf6 16. O-O-O gxh3 17. e5 Bg5 18. Kb1 Bf4 19. g3 Rh2 20. Rf2 d5 21. exd6 Ke7 22. Bd7 b6 23. d5 Bc1 24. b4 Kd6 25. a3 Rg2 26. Rd4 Bf4 27. Re4 Rg1 28. Rf1 Rh1 29. Re6 - Oct 05 22:47 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Bf4 27. Re4 Rg1 28. Rf1 Rh1
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 h5 7. c3 Nh6 8. Ne5 fxe5 9. Bg5 Qf6 10. f4 Ng4 11. f5 Qxg5 12. Qxh5 g5 13. h3 Bg7 14. fxe6 g4 15. Rf1 Bf6 16. O-O-O gxh3 17. e5 Bg5 18. Kb1 Bf4 19. g3 Rh2 20. Rf2 d5 21. exd6 Ke7 22. Bd7 b6 23. d5 Bc1 24. b4 Kd6 25. a3 Rg2 26. Rd4 Bf4 27. Re4 Rg1 28. Rf1 Rh1 - Oct 05 22:47 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 26. Rd4 Bf4 27. Re4 Rg1 28. Rf1
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 h5 7. c3 Nh6 8. Ne5 fxe5 9. Bg5 Qf6 10. f4 Ng4 11. f5 Qxg5 12. Qxh5 g5 13. h3 Bg7 14. fxe6 g4 15. Rf1 Bf6 16. O-O-O gxh3 17. e5 Bg5 18. Kb1 Bf4 19. g3 Rh2 20. Rf2 d5 21. exd6 Ke7 22. Bd7 b6 23. d5 Bc1 24. b4 Kd6 25. a3 Rg2 26. Rd4 Bf4 27. Re4 Rg1 28. Rf1 - Oct 05 22:47 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Rg2 26. Rd4 Bf4 27. Re4 Rg1
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 h5 7. c3 Nh6 8. Ne5 fxe5 9. Bg5 Qf6 10. f4 Ng4 11. f5 Qxg5 12. Qxh5 g5 13. h3 Bg7 14. fxe6 g4 15. Rf1 Bf6 16. O-O-O gxh3 17. e5 Bg5 18. Kb1 Bf4 19. g3 Rh2 20. Rf2 d5 21. exd6 Ke7 22. Bd7 b6 23. d5 Bc1 24. b4 Kd6 25. a3 Rg2 26. Rd4 Bf4 27. Re4 Rg1 - Oct 05 22:47 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 25. a3 Rg2 26. Rd4 Bf4 27. Re4
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 h5 7. c3 Nh6 8. Ne5 fxe5 9. Bg5 Qf6 10. f4 Ng4 11. f5 Qxg5 12. Qxh5 g5 13. h3 Bg7 14. fxe6 g4 15. Rf1 Bf6 16. O-O-O gxh3 17. e5 Bg5 18. Kb1 Bf4 19. g3 Rh2 20. Rf2 d5 21. exd6 Ke7 22. Bd7 b6 23. d5 Bc1 24. b4 Kd6 25. a3 Rg2 26. Rd4 Bf4 27. Re4 - Oct 05 22:47 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Kd6 25. a3 Rg2 26. Rd4 Bf4
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 h5 7. c3 Nh6 8. Ne5 fxe5 9. Bg5 Qf6 10. f4 Ng4 11. f5 Qxg5 12. Qxh5 g5 13. h3 Bg7 14. fxe6 g4 15. Rf1 Bf6 16. O-O-O gxh3 17. e5 Bg5 18. Kb1 Bf4 19. g3 Rh2 20. Rf2 d5 21. exd6 Ke7 22. Bd7 b6 23. d5 Bc1 24. b4 Kd6 25. a3 Rg2 26. Rd4 Bf4 - Oct 05 22:47 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 24. b4 Kd6 25. a3 Rg2 26. Rd4
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 h5 7. c3 Nh6 8. Ne5 fxe5 9. Bg5 Qf6 10. f4 Ng4 11. f5 Qxg5 12. Qxh5 g5 13. h3 Bg7 14. fxe6 g4 15. Rf1 Bf6 16. O-O-O gxh3 17. e5 Bg5 18. Kb1 Bf4 19. g3 Rh2 20. Rf2 d5 21. exd6 Ke7 22. Bd7 b6 23. d5 Bc1 24. b4 Kd6 25. a3 Rg2 26. Rd4