85.4M
positions
16.3M
practically solved
312.67T
engine nodes
2.4M
analyses
13
in queue
6
active workers
36
active cores
14.7M
nodes / sec
40.2
positions / min
154
proof number
4,707
disproof number
Root conquest: 0/20 first moves solved · 19.1% of tree positions solved · last 24h: 97,999 closures, 2.32T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 over 210 open obligations, of which 39 (18.6%) 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 1.3d (median of 3) · measured at 2026-10-16 17:00 UTC
Closures by source, last 24h (97919 of 97919 labelled): USER 65.5% (64159) · FILL 1.8% (1777) · AUTO 32.6% (31925) · SOLVE 0.0% (0) · NONE 0.1% (58) · last 7d (751485 of 751565): USER 89.1% (669788) · FILL 0.8% (6160) · AUTO 10.0% (75065) · SOLVE 0.0% (0) · NONE 0.1% (472). 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 … Nxf2 11. Bh6 f5 12. g3 Qa5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … Nxf2 11. Bh6 f5 12. g3 Qc7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nh3 d5 2. Nc3 h6 … e5 17. f3 Bd7 18. h5 g5 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. e4 e6 … Nxf2 11. Bh6 f5 12. g3 Qb6 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … Nxf2 11. Bh6 f5 12. g3 Qf6 (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 | 1137 | 2 | |
| g1h3 | unsolved | 763 | 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 62.3% of the fleet | 1.44T | 16,652 |
| 2 | RickEdinson 18.1% of the fleet | 420.13B | 4,723 |
| 3 | MoNiKaMaDnEsS 15.8% of the fleet | 365.93B | 3,792 |
| 4 | randomchampgamer 3.8% of the fleet | 87.90B | 494 |
4 accounts · 2.32T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 28.9% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 16.8% of the fleet | 52.44T | 372,828 |
| 3 | tenzink 13.7% 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 | 15.70T | 113,354 |
| 7 | RickEdinson 4.5% of the fleet | 14.02T | 94,903 |
| 8 | JackIV 3.2% of the fleet | 10.06T | 67,859 |
| 9 | MoNiKaMaDnEsS 2.7% of the fleet | 8.31T | 57,292 |
| 10 | gannet 2.3% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 312.74T 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 16 17:45 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. e4 e6 … Nxf2 11. Bh6 f5 12. g3 Rg8
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 Nh6 8. O-O Bb4 9. c3 Ng4 10. Kh1 Nxf2 11. Bh6 f5 12. g3 Rg8 - Oct 16 17:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … d5 23. Qf7 Kd7 24. Bd6 Kc8
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 Nh6 8. O-O Bb4 9. c3 Ng4 10. Kh1 Nxf2 11. Bh6 f5 12. g3 Rg8 13. Bg5 Qb6 14. Be7 e5 15. Qf1 exd4 16. Bxc6 b5 17. Qc1 Bb7 18. Qg5 Rh8 19. cxb4 fxe4 20. Kg1 Rc8 21. Qf6 Rc1 22. Rxc1 d5 23. Qf7 Kd7 24. Bd6 Kc8 - Oct 16 17:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 22. Rxc1 d5 23. Qf7 Kd7 24. Bd6
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 Nh6 8. O-O Bb4 9. c3 Ng4 10. Kh1 Nxf2 11. Bh6 f5 12. g3 Rg8 13. Bg5 Qb6 14. Be7 e5 15. Qf1 exd4 16. Bxc6 b5 17. Qc1 Bb7 18. Qg5 Rh8 19. cxb4 fxe4 20. Kg1 Rc8 21. Qf6 Rc1 22. Rxc1 d5 23. Qf7 Kd7 24. Bd6 - Oct 16 17:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Rc1 22. Rxc1 d5 23. Qf7 Kd7
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 Nh6 8. O-O Bb4 9. c3 Ng4 10. Kh1 Nxf2 11. Bh6 f5 12. g3 Rg8 13. Bg5 Qb6 14. Be7 e5 15. Qf1 exd4 16. Bxc6 b5 17. Qc1 Bb7 18. Qg5 Rh8 19. cxb4 fxe4 20. Kg1 Rc8 21. Qf6 Rc1 22. Rxc1 d5 23. Qf7 Kd7 - Oct 16 17:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 21. Qf6 Rc1 22. Rxc1 d5 23. Qf7
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 Nh6 8. O-O Bb4 9. c3 Ng4 10. Kh1 Nxf2 11. Bh6 f5 12. g3 Rg8 13. Bg5 Qb6 14. Be7 e5 15. Qf1 exd4 16. Bxc6 b5 17. Qc1 Bb7 18. Qg5 Rh8 19. cxb4 fxe4 20. Kg1 Rc8 21. Qf6 Rc1 22. Rxc1 d5 23. Qf7 - Oct 16 17:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Rc8 21. Qf6 Rc1 22. Rxc1 d5
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 Nh6 8. O-O Bb4 9. c3 Ng4 10. Kh1 Nxf2 11. Bh6 f5 12. g3 Rg8 13. Bg5 Qb6 14. Be7 e5 15. Qf1 exd4 16. Bxc6 b5 17. Qc1 Bb7 18. Qg5 Rh8 19. cxb4 fxe4 20. Kg1 Rc8 21. Qf6 Rc1 22. Rxc1 d5 - Oct 16 17:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 20. Kg1 Rc8 21. Qf6 Rc1 22. Rxc1
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 Nh6 8. O-O Bb4 9. c3 Ng4 10. Kh1 Nxf2 11. Bh6 f5 12. g3 Rg8 13. Bg5 Qb6 14. Be7 e5 15. Qf1 exd4 16. Bxc6 b5 17. Qc1 Bb7 18. Qg5 Rh8 19. cxb4 fxe4 20. Kg1 Rc8 21. Qf6 Rc1 22. Rxc1 - Oct 16 17:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … fxe4 20. Kg1 Rc8 21. Qf6 Rc1
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 Nh6 8. O-O Bb4 9. c3 Ng4 10. Kh1 Nxf2 11. Bh6 f5 12. g3 Rg8 13. Bg5 Qb6 14. Be7 e5 15. Qf1 exd4 16. Bxc6 b5 17. Qc1 Bb7 18. Qg5 Rh8 19. cxb4 fxe4 20. Kg1 Rc8 21. Qf6 Rc1 - Oct 16 17:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 19. cxb4 fxe4 20. Kg1 Rc8 21. Qf6
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 Nh6 8. O-O Bb4 9. c3 Ng4 10. Kh1 Nxf2 11. Bh6 f5 12. g3 Rg8 13. Bg5 Qb6 14. Be7 e5 15. Qf1 exd4 16. Bxc6 b5 17. Qc1 Bb7 18. Qg5 Rh8 19. cxb4 fxe4 20. Kg1 Rc8 21. Qf6 - Oct 16 17:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Rh8 19. cxb4 fxe4 20. Kg1 Rc8
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 Nh6 8. O-O Bb4 9. c3 Ng4 10. Kh1 Nxf2 11. Bh6 f5 12. g3 Rg8 13. Bg5 Qb6 14. Be7 e5 15. Qf1 exd4 16. Bxc6 b5 17. Qc1 Bb7 18. Qg5 Rh8 19. cxb4 fxe4 20. Kg1 Rc8 - Oct 16 17:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 18. Qg5 Rh8 19. cxb4 fxe4 20. Kg1
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 Nh6 8. O-O Bb4 9. c3 Ng4 10. Kh1 Nxf2 11. Bh6 f5 12. g3 Rg8 13. Bg5 Qb6 14. Be7 e5 15. Qf1 exd4 16. Bxc6 b5 17. Qc1 Bb7 18. Qg5 Rh8 19. cxb4 fxe4 20. Kg1 - Oct 16 17:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Bb7 18. Qg5 Rh8 19. cxb4 fxe4
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Na3 g6 5. Nb5 cxb5 6. Bb5 Nc6 7. h3 Nh6 8. O-O Bb4 9. c3 Ng4 10. Kh1 Nxf2 11. Bh6 f5 12. g3 Rg8 13. Bg5 Qb6 14. Be7 e5 15. Qf1 exd4 16. Bxc6 b5 17. Qc1 Bb7 18. Qg5 Rh8 19. cxb4 fxe4