85.8M
positions
16.3M
practically solved
315.00T
engine nodes
2.4M
analyses
260
in queue
13
active workers
60
active cores
4.4M
nodes / sec
30.2
positions / min
151
proof number
4,667
disproof number
Root conquest: 0/20 first moves solved · 19.0% of tree positions solved · last 24h: 31,120 closures, 2.13T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 70 over 210 open obligations, of which 38 (18.1%) 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 4.2m (median of 20) · measured at 2026-10-17 20:00 UTC
Closures by source, last 24h (31120 of 31120 labelled): USER 89.0% (27682) · FILL 2.2% (700) · AUTO 8.5% (2645) · SOLVE 0.0% (0) · NONE 0.3% (93) · last 7d (672312 of 672312): USER 86.9% (584388) · FILL 1.0% (6903) · AUTO 12.0% (80477) · SOLVE 0.0% (0) · NONE 0.1% (544). 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 … Rh7 20. Kf2 Rc8 21. f7 Rh8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … 18. h4 e5 19. c4 f5 20. f3 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nh3 d5 2. Nc3 h6 … 16. c4 Nc6 17. Kb2 Na5 18. e4 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. e4 e6 … Bc8 21. Kf2 Na5 22. Ba6 Bd7 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … Bc8 21. Kf2 Na5 22. b3 Bf5 (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 | 1064 | 2 | |
| g1h3 | unsolved | 821 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 400 | 2 | |
| e2e4 | unsolved | 400 | 2 | |
| b1c3 | unsolved | 138 | 2 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b1a3 | unsolved | 0 | 3 | |
| b2b4 | unsolved | -65 | 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 65.5% of the fleet | 1.40T | 6,638 |
| 2 | RickEdinson 23.1% of the fleet | 492.30B | 2,202 |
| 3 | MoNiKaMaDnEsS 6.3% of the fleet | 133.30B | 591 |
| 4 | Torom 5.1% of the fleet | 108.16B | 803 |
4 accounts · 2.13T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 28.7% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 17.1% of the fleet | 54.03T | 380,789 |
| 3 | tenzink 13.6% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.0% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 6.3% of the fleet | 19.85T | 140,897 |
| 6 | Torom 5.0% of the fleet | 15.80T | 114,157 |
| 7 | RickEdinson 4.6% of the fleet | 14.57T | 97,587 |
| 8 | JackIV 3.2% of the fleet | 10.06T | 67,859 |
| 9 | MoNiKaMaDnEsS 2.7% of the fleet | 8.48T | 58,201 |
| 10 | gannet 2.3% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 315.16T 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 · 18 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 23 proposals · see every proposal
Milestones
- Oct 17 20:42 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Bh6 31. Rc7 Re7 32. Rc8 Bf8
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. Rf1 e5 14. dxe5 d6 15. O-O-O d5 16. e5 g4 17. Rxd5 Kf7 18. Bc4 Kg7 19. f6 Kh7 20. e6 Bh6 21. Kb1 Bd2 22. f7 Bxe6 23. Bb5 Rhf8 24. Rf5 Rac8 25. c4 Bg5 26. b4 Rxc4 27. Rd5 Rc8 28. f8=N Kg8 29. Rc5 Re8 30. Ne6 Bh6 31. Rc7 Re7 32. Rc8 Bf8 - Oct 17 20:42 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Re7 32. Rc8 Kh7 33. Rh8 Kg6
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. Rf1 e5 14. dxe5 d6 15. O-O-O d5 16. e5 g4 17. Rxd5 Kf7 18. Bc4 Kg7 19. f6 Kh7 20. e6 Bh6 21. Kb1 Bd2 22. f7 Bxe6 23. Bb5 Rhf8 24. Rf5 Rac8 25. c4 Bg5 26. b4 Rxc4 27. Rd5 Rc8 28. f8=N Kg8 29. Rc5 Re8 30. Ne6 Bh6 31. Rc7 Re7 32. Rc8 Kh7 33. Rh8 Kg6 - Oct 17 20:42 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 31. Rc7 Re7 32. Rc8 Kh7 33. Rh8
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. Rf1 e5 14. dxe5 d6 15. O-O-O d5 16. e5 g4 17. Rxd5 Kf7 18. Bc4 Kg7 19. f6 Kh7 20. e6 Bh6 21. Kb1 Bd2 22. f7 Bxe6 23. Bb5 Rhf8 24. Rf5 Rac8 25. c4 Bg5 26. b4 Rxc4 27. Rd5 Rc8 28. f8=N Kg8 29. Rc5 Re8 30. Ne6 Bh6 31. Rc7 Re7 32. Rc8 Kh7 33. Rh8 - Oct 17 20:42 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Bh6 31. Rc7 Re7 32. Rc8 Kh7
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. Rf1 e5 14. dxe5 d6 15. O-O-O d5 16. e5 g4 17. Rxd5 Kf7 18. Bc4 Kg7 19. f6 Kh7 20. e6 Bh6 21. Kb1 Bd2 22. f7 Bxe6 23. Bb5 Rhf8 24. Rf5 Rac8 25. c4 Bg5 26. b4 Rxc4 27. Rd5 Rc8 28. f8=N Kg8 29. Rc5 Re8 30. Ne6 Bh6 31. Rc7 Re7 32. Rc8 Kh7 - Oct 17 20:41 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … b4 17. Qa4 Kg8 18. Qd7 gxh4
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 h5 7. c3 Bd6 8. Ne5 Bxe5 9. Bf4 d6 10. Bxd6 Kf8 11. Qa4 Nh6 12. f3 g5 13. h4 Nf7 14. Bc4 b5 15. Qa3 Nd6 16. Bxe6 b4 17. Qa4 Kg8 18. Qd7 gxh4 - Oct 17 20:41 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … b4 17. Qa4 Kg8 18. Qd7 bxc3
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 h5 7. c3 Bd6 8. Ne5 Bxe5 9. Bf4 d6 10. Bxd6 Kf8 11. Qa4 Nh6 12. f3 g5 13. h4 Nf7 14. Bc4 b5 15. Qa3 Nd6 16. Bxe6 b4 17. Qa4 Kg8 18. Qd7 bxc3 - Oct 17 20:40 Solved: WHITE_WIN via MATE_PVview
1. e4 c6 2. Nf3 e5 … Ng4 12. Nf7 O-O 13. Bh6 g5
1. e4 c6 2. Nf3 e5 3. Nc3 f6 4. Nd5 cxd5 5. Bb5 g6 6. d4 Nc6 7. Be3 Bb4 8. c3 Nh6 9. Ng5 d5 10. dxe5 Ba3 11. f3 Ng4 12. Nf7 O-O 13. Bh6 g5 - Oct 17 20:40 Solved: WHITE_WIN via MATE_PVview
1. e4 c6 2. Nf3 e5 … Ng4 12. Nf7 O-O 13. Bh6 d4
1. e4 c6 2. Nf3 e5 3. Nc3 f6 4. Nd5 cxd5 5. Bb5 g6 6. d4 Nc6 7. Be3 Bb4 8. c3 Nh6 9. Ng5 d5 10. dxe5 Ba3 11. f3 Ng4 12. Nf7 O-O 13. Bh6 d4 - Oct 17 20:40 Solved: BLACK_WIN via MATE_PVview
1. e4 c6 2. Nf3 e5 … 16. Qc2 g4 17. Rf1 dxe4 18. Be2
1. e4 c6 2. Nf3 e5 3. Nc3 f6 4. Nd5 cxd5 5. Bb5 g6 6. d4 Nc6 7. Be3 Bb4 8. c3 Nh6 9. Ng5 d5 10. dxe5 Ng4 11. f3 Nxe3 12. Nf7 Qe7 13. Nd6 Kf8 14. Qc1 g5 15. Nxb7 Bc5 16. Qc2 g4 17. Rf1 dxe4 18. Be2 - Oct 17 20:40 Solved: BLACK_WIN via MATE_PVview
1. e4 c6 2. Nf3 e5 … 16. Qc2 g4 17. Rf1 dxe4 18. Qe2
1. e4 c6 2. Nf3 e5 3. Nc3 f6 4. Nd5 cxd5 5. Bb5 g6 6. d4 Nc6 7. Be3 Bb4 8. c3 Nh6 9. Ng5 d5 10. dxe5 Ng4 11. f3 Nxe3 12. Nf7 Qe7 13. Nd6 Kf8 14. Qc1 g5 15. Nxb7 Bc5 16. Qc2 g4 17. Rf1 dxe4 18. Qe2 - Oct 17 20:40 Solved: BLACK_WIN via MATE_PVview
1. e4 c6 2. Nf3 e5 … 16. Qc2 g4 17. Rf1 dxe4 18. Kd1
1. e4 c6 2. Nf3 e5 3. Nc3 f6 4. Nd5 cxd5 5. Bb5 g6 6. d4 Nc6 7. Be3 Bb4 8. c3 Nh6 9. Ng5 d5 10. dxe5 Ng4 11. f3 Nxe3 12. Nf7 Qe7 13. Nd6 Kf8 14. Qc1 g5 15. Nxb7 Bc5 16. Qc2 g4 17. Rf1 dxe4 18. Kd1 - Oct 17 20:40 Solved: BLACK_WIN via MATE_PVview
1. e4 c6 2. Nf3 e5 … 17. Rf1 dxe4 18. Kd2 Qe1 19. Kd3
1. e4 c6 2. Nf3 e5 3. Nc3 f6 4. Nd5 cxd5 5. Bb5 g6 6. d4 Nc6 7. Be3 Bb4 8. c3 Nh6 9. Ng5 d5 10. dxe5 Ng4 11. f3 Nxe3 12. Nf7 Qe7 13. Nd6 Kf8 14. Qc1 g5 15. Nxb7 Bc5 16. Qc2 g4 17. Rf1 dxe4 18. Kd2 Qe1 19. Kd3