85.7M
positions
16.3M
practically solved
313.95T
engine nodes
2.4M
analyses
104
in queue
5
active workers
28
active cores
9.3M
nodes / sec
7.9
positions / min
151
proof number
4,667
disproof number
Root conquest: 0/20 first moves solved · 19.1% of tree positions solved · last 24h: 74,904 closures, 2.05T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 70 over 212 open obligations, of which 39 (18.4%) 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 17.9m (median of 20) · measured at 2026-10-17 08:00 UTC
Closures by source, last 24h (74904 of 74904 labelled): USER 65.5% (49082) · FILL 2.0% (1503) · AUTO 32.4% (24245) · SOLVE 0.0% (0) · NONE 0.1% (74) · last 7d (698461 of 698461): USER 87.4% (610575) · FILL 1.0% (6903) · AUTO 11.5% (80477) · SOLVE 0.0% (0) · NONE 0.1% (506). 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 … Rb8 19. a4 Bc8 20. b3 a5 (User) · 512.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … 19. d5 a5 20. Ke2 Bxg4 21. h5 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. e4 e6 … Bc8 19. Kf2 Be7 20. Ke2 Bxf5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. e4 e6 … Na5 20. Ba6 Be6 21. fxe6 Nc4 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … Bf7 21. h5 Rh6 22. Bxc6 b5 (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 | 1159 | 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 63.3% of the fleet | 1.30T | 12,492 |
| 2 | RickEdinson 22.9% of the fleet | 468.36B | 3,827 |
| 3 | MoNiKaMaDnEsS 13.8% of the fleet | 283.69B | 2,670 |
3 accounts · 2.05T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 28.8% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 16.9% of the fleet | 53.21T | 377,233 |
| 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 | 15.70T | 113,354 |
| 7 | RickEdinson 4.6% of the fleet | 14.33T | 96,520 |
| 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 · 313.99T 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 08:31 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 21. Kf3 Rf2 22. Ke3 Re2 23. Kf3
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 d6 13. h3 g5 14. g4 e5 15. h4 b6 16. a4 Ba6 17. d5 Kd8 18. Rc1 Bc8 19. Ke2 a6 20. hxg5 Rh2 21. Kf3 Rf2 22. Ke3 Re2 23. Kf3 - Oct 17 08:31 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Rh2 21. Kf3 Rf2 22. Ke3 Re2
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 d6 13. h3 g5 14. g4 e5 15. h4 b6 16. a4 Ba6 17. d5 Kd8 18. Rc1 Bc8 19. Ke2 a6 20. hxg5 Rh2 21. Kf3 Rf2 22. Ke3 Re2 - Oct 17 08:31 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 20. hxg5 Rh2 21. Kf3 Rf2 22. Ke3
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 d6 13. h3 g5 14. g4 e5 15. h4 b6 16. a4 Ba6 17. d5 Kd8 18. Rc1 Bc8 19. Ke2 a6 20. hxg5 Rh2 21. Kf3 Rf2 22. Ke3 - Oct 17 08:31 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … a6 20. hxg5 Rh2 21. Kf3 Rf2
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 d6 13. h3 g5 14. g4 e5 15. h4 b6 16. a4 Ba6 17. d5 Kd8 18. Rc1 Bc8 19. Ke2 a6 20. hxg5 Rh2 21. Kf3 Rf2 - Oct 17 08:31 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 19. Ke2 a6 20. hxg5 Rh2 21. Kf3
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 d6 13. h3 g5 14. g4 e5 15. h4 b6 16. a4 Ba6 17. d5 Kd8 18. Rc1 Bc8 19. Ke2 a6 20. hxg5 Rh2 21. Kf3 - Oct 17 08:18 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Bc8 19. Kf2 Na5 20. Bd7 a6
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 d6 13. h3 g5 14. g4 e5 15. h4 b6 16. a4 Ba6 17. d5 Kd8 18. Rc1 Bc8 19. Kf2 Na5 20. Bd7 a6 - Oct 17 08:18 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Bc8 19. Kf2 Na5 20. Bd7 b5
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 d6 13. h3 g5 14. g4 e5 15. h4 b6 16. a4 Ba6 17. d5 Kd8 18. Rc1 Bc8 19. Kf2 Na5 20. Bd7 b5 - Oct 17 08:18 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Kg8 23. Bf7 Kh7 24. hxg5 Bh6
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 d6 13. h3 g5 14. g4 e5 15. h4 b6 16. a4 Ba6 17. d5 Kd8 18. Rc1 Bc8 19. Kf2 Na5 20. Bd7 Ke7 21. f6 Kf7 22. Be8 Kg8 23. Bf7 Kh7 24. hxg5 Bh6 - Oct 17 08:18 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 22. Be8 Kg8 23. Bf7 Kh7 24. hxg5
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 d6 13. h3 g5 14. g4 e5 15. h4 b6 16. a4 Ba6 17. d5 Kd8 18. Rc1 Bc8 19. Kf2 Na5 20. Bd7 Ke7 21. f6 Kf7 22. Be8 Kg8 23. Bf7 Kh7 24. hxg5 - Oct 17 08:18 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Kf7 22. Be8 Kg8 23. Bf7 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 d6 13. h3 g5 14. g4 e5 15. h4 b6 16. a4 Ba6 17. d5 Kd8 18. Rc1 Bc8 19. Kf2 Na5 20. Bd7 Ke7 21. f6 Kf7 22. Be8 Kg8 23. Bf7 Kh7 - Oct 17 08:18 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 21. f6 Kf7 22. Be8 Kg8 23. Bf7
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 d6 13. h3 g5 14. g4 e5 15. h4 b6 16. a4 Ba6 17. d5 Kd8 18. Rc1 Bc8 19. Kf2 Na5 20. Bd7 Ke7 21. f6 Kf7 22. Be8 Kg8 23. Bf7 - Oct 17 08:18 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Ke7 21. f6 Kf7 22. Be8 Kg8
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 d6 13. h3 g5 14. g4 e5 15. h4 b6 16. a4 Ba6 17. d5 Kd8 18. Rc1 Bc8 19. Kf2 Na5 20. Bd7 Ke7 21. f6 Kf7 22. Be8 Kg8