104.2M
positions
22.1M
practically solved
384.44T
engine nodes
2.9M
analyses
94
in queue
active workers
36
active cores
33.9M
nodes / sec
10.5
positions / min
107
proof number
4,824
disproof number
Root conquest: 0/20 first moves solved · 21.3% of tree positions solved · last 24h: 137,871 closures, 2.28T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 over 202 open obligations, of which 37 (18.3%) 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 6.0m (median of 106) · measured at 2026-10-31 16:00 UTC
Closures by source, last 24h (137871 of 137871 labelled): USER 99.7% (137413) · FILL 0.3% (410) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.0% (48) · last 7d (1326761 of 1326761): USER 98.0% (1299930) · FILL 0.8% (10048) · AUTO 1.2% (16257) · SOLVE 0.0% (0) · NONE 0.0% (526). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing all workers
- 1. Nf3 f6 2. e4 e6 … 10. Kh1 Qa5 11. Bf4 Qa4 12. a3 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#0
- 1. Nf3 f6 2. e4 e6 … 10. Kh1 Qa5 11. Bf4 Qa4 12. Bc7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nh3 f6 2. Nc3 h6 … Ke8 19. O-O Nd3 20. Nxc7 Kd8 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. Nc3 c6 … h5 11. h3 Qc7 12. d5 Qb6 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … 10. O-O Bd7 11. Re1 f4 12. a4 (User) · 128.0M nodes · MoNiKaMaDnEsS-DESKTOP-VG9VPVH-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 | 1129 | 2 | |
| g1h3 | unsolved | 820 | 2 | |
| e2e3 | unsolved | 469 | 3 | |
| e2e4 | unsolved | 410 | 2 | |
| d2d4 | unsolved | 405 | 2 | |
| b1c3 | unsolved | 142 | 2 | |
| b1a3 | unsolved | 0 | 3 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b2b4 | unsolved | -59 | 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 71.2% of the fleet | 1.62T | 6,649 |
| 2 | RickEdinson 17.9% of the fleet | 407.25B | 2,528 |
| 3 | MoNiKaMaDnEsS 10.5% of the fleet | 239.21B | 1,734 |
| 4 | soothdest 0.4% of the fleet | 9.70B | 63 |
4 accounts · 2.28T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 23.5% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 20.3% of the fleet | 78.06T | 528,557 |
| 3 | Torom 13.1% of the fleet | 50.55T | 363,522 |
| 4 | tenzink 11.1% of the fleet | 42.83T | 349,427 |
| 5 | auranvesdranor 8.2% of the fleet | 31.40T | 228,002 |
| 6 | RickEdinson 5.5% of the fleet | 21.08T | 138,114 |
| 7 | randomchampgamer 5.2% of the fleet | 19.85T | 140,897 |
| 8 | MoNiKaMaDnEsS 3.2% of the fleet | 12.48T | 86,321 |
| 9 | JackIV 2.6% of the fleet | 10.06T | 67,859 |
| 10 | gannet 1.9% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 384.54T 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 31 16:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Qa5 11. Bf4 Qa4 12. Bd6 h4
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 a6 8. O-O h5 9. c4 axb5 10. Kh1 Qa5 11. Bf4 Qa4 12. Bd6 h4 - Oct 31 16:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Ka6 21. a4 f5 22. Rc7 fxe4
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 a6 8. O-O h5 9. c4 axb5 10. Kh1 Qa5 11. Bf4 Qa4 12. Bd6 Kd8 13. Be7 Kc7 14. Bd8 Kb8 15. Bc7 Ka7 16. c5 Qc2 17. Qd3 Qxd3 18. b4 Bd6 19. Bb6 Bxc5 20. Rfc1 Ka6 21. a4 f5 22. Rc7 fxe4 - Oct 31 16:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 20. Rfc1 Ka6 21. a4 f5 22. Rc7
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 a6 8. O-O h5 9. c4 axb5 10. Kh1 Qa5 11. Bf4 Qa4 12. Bd6 Kd8 13. Be7 Kc7 14. Bd8 Kb8 15. Bc7 Ka7 16. c5 Qc2 17. Qd3 Qxd3 18. b4 Bd6 19. Bb6 Bxc5 20. Rfc1 Ka6 21. a4 f5 22. Rc7 - Oct 31 16:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Bxc5 20. Rfc1 Ka6 21. a4 f5
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 a6 8. O-O h5 9. c4 axb5 10. Kh1 Qa5 11. Bf4 Qa4 12. Bd6 Kd8 13. Be7 Kc7 14. Bd8 Kb8 15. Bc7 Ka7 16. c5 Qc2 17. Qd3 Qxd3 18. b4 Bd6 19. Bb6 Bxc5 20. Rfc1 Ka6 21. a4 f5 - Oct 31 16:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 19. Bb6 Bxc5 20. Rfc1 Ka6 21. a4
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 a6 8. O-O h5 9. c4 axb5 10. Kh1 Qa5 11. Bf4 Qa4 12. Bd6 Kd8 13. Be7 Kc7 14. Bd8 Kb8 15. Bc7 Ka7 16. c5 Qc2 17. Qd3 Qxd3 18. b4 Bd6 19. Bb6 Bxc5 20. Rfc1 Ka6 21. a4 - Oct 31 16:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Bd6 19. Bb6 Bxc5 20. Rfc1 Ka6
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 a6 8. O-O h5 9. c4 axb5 10. Kh1 Qa5 11. Bf4 Qa4 12. Bd6 Kd8 13. Be7 Kc7 14. Bd8 Kb8 15. Bc7 Ka7 16. c5 Qc2 17. Qd3 Qxd3 18. b4 Bd6 19. Bb6 Bxc5 20. Rfc1 Ka6 - Oct 31 16:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 18. b4 Bd6 19. Bb6 Bxc5 20. Rfc1
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 a6 8. O-O h5 9. c4 axb5 10. Kh1 Qa5 11. Bf4 Qa4 12. Bd6 Kd8 13. Be7 Kc7 14. Bd8 Kb8 15. Bc7 Ka7 16. c5 Qc2 17. Qd3 Qxd3 18. b4 Bd6 19. Bb6 Bxc5 20. Rfc1 - Oct 31 16:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Qxd3 18. b4 Bd6 19. Bb6 Bxc5
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 a6 8. O-O h5 9. c4 axb5 10. Kh1 Qa5 11. Bf4 Qa4 12. Bd6 Kd8 13. Be7 Kc7 14. Bd8 Kb8 15. Bc7 Ka7 16. c5 Qc2 17. Qd3 Qxd3 18. b4 Bd6 19. Bb6 Bxc5 - Oct 31 16:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 17. Qd3 Qxd3 18. b4 Bd6 19. Bb6
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 a6 8. O-O h5 9. c4 axb5 10. Kh1 Qa5 11. Bf4 Qa4 12. Bd6 Kd8 13. Be7 Kc7 14. Bd8 Kb8 15. Bc7 Ka7 16. c5 Qc2 17. Qd3 Qxd3 18. b4 Bd6 19. Bb6 - Oct 31 16:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Qc2 17. Qd3 Qxd3 18. b4 Bd6
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 a6 8. O-O h5 9. c4 axb5 10. Kh1 Qa5 11. Bf4 Qa4 12. Bd6 Kd8 13. Be7 Kc7 14. Bd8 Kb8 15. Bc7 Ka7 16. c5 Qc2 17. Qd3 Qxd3 18. b4 Bd6 - Oct 31 16:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 16. c5 Qc2 17. Qd3 Qxd3 18. b4
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 a6 8. O-O h5 9. c4 axb5 10. Kh1 Qa5 11. Bf4 Qa4 12. Bd6 Kd8 13. Be7 Kc7 14. Bd8 Kb8 15. Bc7 Ka7 16. c5 Qc2 17. Qd3 Qxd3 18. b4 - Oct 31 16:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Ka7 16. c5 Qc2 17. Qd3 Qxd3
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 a6 8. O-O h5 9. c4 axb5 10. Kh1 Qa5 11. Bf4 Qa4 12. Bd6 Kd8 13. Be7 Kc7 14. Bd8 Kb8 15. Bc7 Ka7 16. c5 Qc2 17. Qd3 Qxd3