74.4M
positions
13.8M
practically solved
267.07T
engine nodes
2.1M
analyses
3,782
in queue
8
active workers
48
active cores
0
nodes / sec
20.8
positions / min
82
proof number
3,797
disproof number
Root conquest: 0/20 first moves solved · 18.6% of tree positions solved · last 24h: 118,403 closures, 3.61T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 67 over 212 open obligations, of which 41 (19.3%) 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 4.0m (median of 8) · measured at 2026-10-04 11:00 UTC
Closures by source, last 24h (118402 of 118402 labelled): USER 99.2% (117412) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.8% (990) · last 7d (2153289 of 2153290): USER 99.8% (2148754) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.2% (4535). 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. Ne5 fxe5 … Bd3 22. Bg7 Nd8 23. Bf6 Nf7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. Ne5 fxe5 … Nd8 22. Bxd6 g5 23. a4 b6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. Ne5 fxe5 … Bd7 26. a4 Ne5 27. f4 Nd3 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. Ne5 fxe5 … Kd8 24. Bg7 a6 25. Bf8 Nb8 (User) · 128.0M nodes · randomchampgamer-2026PC-atomicdb
- 1. Nf3 f6 2. Ne5 fxe5 … Nd8 22. Bxd6 Bd3 23. a4 b6 (User) · 128.0M nodes · RickEdinson-MSI-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 | 1057 | 2 | |
| g1h3 | unsolved | 724 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 440 | 2 | |
| e2e4 | unsolved | 418 | 2 | |
| b1c3 | unsolved | 114 | 2 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b1a3 | unsolved | 0 | 3 | |
| 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 47.1% of the fleet | 1.70T | 12,762 |
| 2 | randomchampgamer 19.7% of the fleet | 712.67B | 5,168 |
| 3 | tenzink 19.4% of the fleet | 698.77B | 4,864 |
| 4 | RickEdinson 13.8% of the fleet | 497.78B | 3,263 |
| 5 | quasa <0.1% of the fleet | 766.4M | 6 |
5 accounts · 3.61T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 33.8% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.1% of the fleet | 40.47T | 333,950 |
| 3 | BManBJ 13.6% of the fleet | 36.45T | 257,743 |
| 4 | auranvesdranor 11.8% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 5.0% of the fleet | 13.31T | 99,028 |
| 6 | JackIV 3.8% of the fleet | 10.06T | 67,859 |
| 7 | RickEdinson 3.3% of the fleet | 8.72T | 58,623 |
| 8 | gannet 2.7% of the fleet | 7.24T | 46,848 |
| 9 | MoNiKaMaDnEsS 2.0% of the fleet | 5.21T | 34,838 |
| 10 | NeoArcturus 1.5% of the fleet | 4.09T | 16,758 |
and 25 more.
35 accounts · 267.16T 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 · 4 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
Showing the 6 most voted of 21 proposals · see every proposal
Milestones
- Oct 04 11:36 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Ne5 fxe5 … Be2 23. Bg7 Nd8 24. Bf6 d5
1. Nf3 f6 2. Ne5 fxe5 3. e4 c6 4. Na3 d6 5. Nb5 cxb5 6. d4 Nc6 7. Bc4 e6 8. b4 Qa5 9. Bg5 Nf6 10. Bxe6 Qf5 11. Qf3 g6 12. Bh6 Be7 13. exf5 Bh4 14. O-O-O Bf5 15. c4 O-O-O 16. Qg3 Bxg3 17. Rde1 Rde8 18. Re3 Rxe3 19. Re1 Re8 20. Re7 Rxe7 21. a4 Bd3 22. g4 Be2 23. Bg7 Nd8 24. Bf6 d5 - Oct 04 11:36 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Ne5 fxe5 … Kc7 30. f8=Q Kb6 31. Qb8 g5
1. Nf3 f6 2. Ne5 fxe5 3. e4 c6 4. Na3 d6 5. Nb5 cxb5 6. d4 Nc6 7. Bc4 e6 8. b4 Qa5 9. Bg5 Nf6 10. Bxe6 Qf5 11. Qf3 g6 12. Bh6 Be7 13. exf5 Bh4 14. O-O-O Bf5 15. c4 O-O-O 16. Qg3 Bxg3 17. Rde1 Rde8 18. Re3 Rxe3 19. Re1 Re8 20. Re7 Rxe7 21. f4 Bb1 22. g4 Bc2 23. h4 Kd8 24. f5 Ne5 25. f6 Nd3 26. Kd2 Nf4 27. f7 Ne6 28. d5 Nf8 29. Bxf8 Kc7 30. f8=Q Kb6 31. Qb8 g5 - Oct 04 11:36 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Ne5 fxe5 … 29. Bxf8 Kc7 30. f8=Q Kb6 31. Qb8
1. Nf3 f6 2. Ne5 fxe5 3. e4 c6 4. Na3 d6 5. Nb5 cxb5 6. d4 Nc6 7. Bc4 e6 8. b4 Qa5 9. Bg5 Nf6 10. Bxe6 Qf5 11. Qf3 g6 12. Bh6 Be7 13. exf5 Bh4 14. O-O-O Bf5 15. c4 O-O-O 16. Qg3 Bxg3 17. Rde1 Rde8 18. Re3 Rxe3 19. Re1 Re8 20. Re7 Rxe7 21. f4 Bb1 22. g4 Bc2 23. h4 Kd8 24. f5 Ne5 25. f6 Nd3 26. Kd2 Nf4 27. f7 Ne6 28. d5 Nf8 29. Bxf8 Kc7 30. f8=Q Kb6 31. Qb8 - Oct 04 11:36 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Ne5 fxe5 … Nf8 29. Bxf8 Kc7 30. f8=Q Kb6
1. Nf3 f6 2. Ne5 fxe5 3. e4 c6 4. Na3 d6 5. Nb5 cxb5 6. d4 Nc6 7. Bc4 e6 8. b4 Qa5 9. Bg5 Nf6 10. Bxe6 Qf5 11. Qf3 g6 12. Bh6 Be7 13. exf5 Bh4 14. O-O-O Bf5 15. c4 O-O-O 16. Qg3 Bxg3 17. Rde1 Rde8 18. Re3 Rxe3 19. Re1 Re8 20. Re7 Rxe7 21. f4 Bb1 22. g4 Bc2 23. h4 Kd8 24. f5 Ne5 25. f6 Nd3 26. Kd2 Nf4 27. f7 Ne6 28. d5 Nf8 29. Bxf8 Kc7 30. f8=Q Kb6 - Oct 04 11:36 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Ne5 fxe5 … 28. d5 Nf8 29. Bxf8 Kc7 30. f8=Q
1. Nf3 f6 2. Ne5 fxe5 3. e4 c6 4. Na3 d6 5. Nb5 cxb5 6. d4 Nc6 7. Bc4 e6 8. b4 Qa5 9. Bg5 Nf6 10. Bxe6 Qf5 11. Qf3 g6 12. Bh6 Be7 13. exf5 Bh4 14. O-O-O Bf5 15. c4 O-O-O 16. Qg3 Bxg3 17. Rde1 Rde8 18. Re3 Rxe3 19. Re1 Re8 20. Re7 Rxe7 21. f4 Bb1 22. g4 Bc2 23. h4 Kd8 24. f5 Ne5 25. f6 Nd3 26. Kd2 Nf4 27. f7 Ne6 28. d5 Nf8 29. Bxf8 Kc7 30. f8=Q - Oct 04 11:36 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Ne5 fxe5 … Ne6 28. d5 Nf8 29. Bxf8 Kc7
1. Nf3 f6 2. Ne5 fxe5 3. e4 c6 4. Na3 d6 5. Nb5 cxb5 6. d4 Nc6 7. Bc4 e6 8. b4 Qa5 9. Bg5 Nf6 10. Bxe6 Qf5 11. Qf3 g6 12. Bh6 Be7 13. exf5 Bh4 14. O-O-O Bf5 15. c4 O-O-O 16. Qg3 Bxg3 17. Rde1 Rde8 18. Re3 Rxe3 19. Re1 Re8 20. Re7 Rxe7 21. f4 Bb1 22. g4 Bc2 23. h4 Kd8 24. f5 Ne5 25. f6 Nd3 26. Kd2 Nf4 27. f7 Ne6 28. d5 Nf8 29. Bxf8 Kc7 - Oct 04 11:36 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Ne5 fxe5 … 27. f7 Ne6 28. d5 Nf8 29. Bxf8
1. Nf3 f6 2. Ne5 fxe5 3. e4 c6 4. Na3 d6 5. Nb5 cxb5 6. d4 Nc6 7. Bc4 e6 8. b4 Qa5 9. Bg5 Nf6 10. Bxe6 Qf5 11. Qf3 g6 12. Bh6 Be7 13. exf5 Bh4 14. O-O-O Bf5 15. c4 O-O-O 16. Qg3 Bxg3 17. Rde1 Rde8 18. Re3 Rxe3 19. Re1 Re8 20. Re7 Rxe7 21. f4 Bb1 22. g4 Bc2 23. h4 Kd8 24. f5 Ne5 25. f6 Nd3 26. Kd2 Nf4 27. f7 Ne6 28. d5 Nf8 29. Bxf8 - Oct 04 11:36 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Ne5 fxe5 … Nf4 27. f7 Ne6 28. d5 Nf8
1. Nf3 f6 2. Ne5 fxe5 3. e4 c6 4. Na3 d6 5. Nb5 cxb5 6. d4 Nc6 7. Bc4 e6 8. b4 Qa5 9. Bg5 Nf6 10. Bxe6 Qf5 11. Qf3 g6 12. Bh6 Be7 13. exf5 Bh4 14. O-O-O Bf5 15. c4 O-O-O 16. Qg3 Bxg3 17. Rde1 Rde8 18. Re3 Rxe3 19. Re1 Re8 20. Re7 Rxe7 21. f4 Bb1 22. g4 Bc2 23. h4 Kd8 24. f5 Ne5 25. f6 Nd3 26. Kd2 Nf4 27. f7 Ne6 28. d5 Nf8 - Oct 04 11:36 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Ne5 fxe5 … 26. Kd2 Nf4 27. f7 Ne6 28. d5
1. Nf3 f6 2. Ne5 fxe5 3. e4 c6 4. Na3 d6 5. Nb5 cxb5 6. d4 Nc6 7. Bc4 e6 8. b4 Qa5 9. Bg5 Nf6 10. Bxe6 Qf5 11. Qf3 g6 12. Bh6 Be7 13. exf5 Bh4 14. O-O-O Bf5 15. c4 O-O-O 16. Qg3 Bxg3 17. Rde1 Rde8 18. Re3 Rxe3 19. Re1 Re8 20. Re7 Rxe7 21. f4 Bb1 22. g4 Bc2 23. h4 Kd8 24. f5 Ne5 25. f6 Nd3 26. Kd2 Nf4 27. f7 Ne6 28. d5 - Oct 04 11:36 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Ne5 fxe5 … Nd3 26. Kd2 Nf4 27. f7 Ne6
1. Nf3 f6 2. Ne5 fxe5 3. e4 c6 4. Na3 d6 5. Nb5 cxb5 6. d4 Nc6 7. Bc4 e6 8. b4 Qa5 9. Bg5 Nf6 10. Bxe6 Qf5 11. Qf3 g6 12. Bh6 Be7 13. exf5 Bh4 14. O-O-O Bf5 15. c4 O-O-O 16. Qg3 Bxg3 17. Rde1 Rde8 18. Re3 Rxe3 19. Re1 Re8 20. Re7 Rxe7 21. f4 Bb1 22. g4 Bc2 23. h4 Kd8 24. f5 Ne5 25. f6 Nd3 26. Kd2 Nf4 27. f7 Ne6 - Oct 04 11:36 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Ne5 fxe5 … 25. f6 Nd3 26. Kd2 Nf4 27. f7
1. Nf3 f6 2. Ne5 fxe5 3. e4 c6 4. Na3 d6 5. Nb5 cxb5 6. d4 Nc6 7. Bc4 e6 8. b4 Qa5 9. Bg5 Nf6 10. Bxe6 Qf5 11. Qf3 g6 12. Bh6 Be7 13. exf5 Bh4 14. O-O-O Bf5 15. c4 O-O-O 16. Qg3 Bxg3 17. Rde1 Rde8 18. Re3 Rxe3 19. Re1 Re8 20. Re7 Rxe7 21. f4 Bb1 22. g4 Bc2 23. h4 Kd8 24. f5 Ne5 25. f6 Nd3 26. Kd2 Nf4 27. f7 - Oct 04 11:36 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Ne5 fxe5 … Ne5 25. f6 Nd3 26. Kd2 Nf4
1. Nf3 f6 2. Ne5 fxe5 3. e4 c6 4. Na3 d6 5. Nb5 cxb5 6. d4 Nc6 7. Bc4 e6 8. b4 Qa5 9. Bg5 Nf6 10. Bxe6 Qf5 11. Qf3 g6 12. Bh6 Be7 13. exf5 Bh4 14. O-O-O Bf5 15. c4 O-O-O 16. Qg3 Bxg3 17. Rde1 Rde8 18. Re3 Rxe3 19. Re1 Re8 20. Re7 Rxe7 21. f4 Bb1 22. g4 Bc2 23. h4 Kd8 24. f5 Ne5 25. f6 Nd3 26. Kd2 Nf4