80.3M
positions
15.5M
practically solved
290.38T
engine nodes
2.2M
analyses
4,133
in queue
6
active workers
34
active cores
5.3M
nodes / sec
11.1
positions / min
82
proof number
4,106
disproof number
Root conquest: 0/20 first moves solved · 19.3% of tree positions solved · last 24h: 323,702 closures, 4.60T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 over 219 open obligations, of which 41 (18.7%) 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 1.5h (median of 89) · measured at 2026-10-09 22:00 UTC
Closures by source, last 24h (323702 of 323702 labelled): USER 100.0% (323644) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.0% (58) · last 7d (1716944 of 1716944): USER 99.0% (1700065) · FILL 0.1% (2071) · AUTO 0.7% (11952) · SOLVE 0.0% (0) · NONE 0.2% (2856). 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. Nc3 c6 … 11. Bh6 Be1 12. Kh1 a6 13. Bxc6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … 21. f5 Rfc8 22. Bd2 Rab8 23. Bb4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. Nc3 c6 … 11. Bh6 Be1 12. Kh1 a6 13. Bc1 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 d6 2. Ng5 f5 … 10. b5 b6 11. O-O h4 12. Bd8 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 c6 … 11. Bh6 Be1 12. Kh1 a6 13. Bxa6 (User) · 128.0M nodes · randomchampgamer-2026PC-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 | 1079 | 2 | |
| g1h3 | unsolved | 820 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| e2e4 | unsolved | 400 | 2 | |
| d2d4 | unsolved | 379 | 2 | |
| b1c3 | unsolved | 127 | 2 | |
| b1a3 | unsolved | 0 | 3 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| 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 | Torom 41.0% of the fleet | 1.89T | 12,733 |
| 2 | BManBJ 32.9% of the fleet | 1.51T | 9,850 |
| 3 | randomchampgamer 14.3% of the fleet | 657.43B | 5,002 |
| 4 | RickEdinson 9.5% of the fleet | 435.97B | 2,804 |
| 5 | MoNiKaMaDnEsS 2.3% of the fleet | 107.50B | 662 |
| 6 | soothdest <0.1% of the fleet | 8.0M | 17 |
6 accounts · 4.60T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 31.1% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 15.3% of the fleet | 44.43T | 310,593 |
| 3 | tenzink 14.7% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.8% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 5.8% of the fleet | 16.88T | 123,826 |
| 6 | RickEdinson 3.9% of the fleet | 11.22T | 74,782 |
| 7 | JackIV 3.5% of the fleet | 10.06T | 67,859 |
| 8 | Torom 3.2% of the fleet | 9.26T | 68,482 |
| 9 | gannet 2.5% of the fleet | 7.24T | 46,848 |
| 10 | MoNiKaMaDnEsS 2.2% of the fleet | 6.31T | 42,670 |
and 25 more.
35 accounts · 290.52T 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 · 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 22 proposals · see every proposal
Milestones
- Oct 09 22:51 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. e4 e6 … Bb4 11. Bh6 Be1 12. Kh1 Rf8
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 Nh6 7. Ne5 fxe5 8. Qh5 g6 9. Qg5 Qxg5 10. O-O Bb4 11. Bh6 Be1 12. Kh1 Rf8 - Oct 09 22:51 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. e4 e6 … Bb4 11. Bh6 Be1 12. Kh1 Bxf2
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 Nh6 7. Ne5 fxe5 8. Qh5 g6 9. Qg5 Qxg5 10. O-O Bb4 11. Bh6 Be1 12. Kh1 Bxf2 - Oct 09 22:51 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … d6 16. Re7 e5 17. Re8 Kc7
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 Nh6 7. Ne5 fxe5 8. Qh5 g6 9. Qg5 Qxg5 10. O-O Bb4 11. Bh6 Be1 12. Kh1 Bxf2 13. h3 g5 14. Rf1 Kd8 15. Rf7 d6 16. Re7 e5 17. Re8 Kc7 - Oct 09 22:51 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 15. Rf7 d6 16. Re7 e5 17. Re8
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 Nh6 7. Ne5 fxe5 8. Qh5 g6 9. Qg5 Qxg5 10. O-O Bb4 11. Bh6 Be1 12. Kh1 Bxf2 13. h3 g5 14. Rf1 Kd8 15. Rf7 d6 16. Re7 e5 17. Re8 - Oct 09 22:51 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Kd8 15. Rf7 d6 16. Re7 e5
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 Nh6 7. Ne5 fxe5 8. Qh5 g6 9. Qg5 Qxg5 10. O-O Bb4 11. Bh6 Be1 12. Kh1 Bxf2 13. h3 g5 14. Rf1 Kd8 15. Rf7 d6 16. Re7 e5 - Oct 09 22:51 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 14. Rf1 Kd8 15. Rf7 d6 16. Re7
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 Nh6 7. Ne5 fxe5 8. Qh5 g6 9. Qg5 Qxg5 10. O-O Bb4 11. Bh6 Be1 12. Kh1 Bxf2 13. h3 g5 14. Rf1 Kd8 15. Rf7 d6 16. Re7 - Oct 09 22:51 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … g5 14. Rf1 Kd8 15. Rf7 d6
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 Nh6 7. Ne5 fxe5 8. Qh5 g6 9. Qg5 Qxg5 10. O-O Bb4 11. Bh6 Be1 12. Kh1 Bxf2 13. h3 g5 14. Rf1 Kd8 15. Rf7 d6 - Oct 09 22:51 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 13. h3 g5 14. Rf1 Kd8 15. Rf7
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 Nh6 7. Ne5 fxe5 8. Qh5 g6 9. Qg5 Qxg5 10. O-O Bb4 11. Bh6 Be1 12. Kh1 Bxf2 13. h3 g5 14. Rf1 Kd8 15. Rf7 - Oct 09 22:51 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Bxf2 13. h3 g5 14. Rf1 Kd8
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 Nh6 7. Ne5 fxe5 8. Qh5 g6 9. Qg5 Qxg5 10. O-O Bb4 11. Bh6 Be1 12. Kh1 Bxf2 13. h3 g5 14. Rf1 Kd8 - Oct 09 22:51 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 12. Kh1 Bxf2 13. h3 g5 14. Rf1
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 Nh6 7. Ne5 fxe5 8. Qh5 g6 9. Qg5 Qxg5 10. O-O Bb4 11. Bh6 Be1 12. Kh1 Bxf2 13. h3 g5 14. Rf1 - Oct 09 22:51 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Be1 12. Kh1 Bxf2 13. h3 g5
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 Nh6 7. Ne5 fxe5 8. Qh5 g6 9. Qg5 Qxg5 10. O-O Bb4 11. Bh6 Be1 12. Kh1 Bxf2 13. h3 g5 - Oct 09 22:51 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 11. Bh6 Be1 12. Kh1 Bxf2 13. h3
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 Nh6 7. Ne5 fxe5 8. Qh5 g6 9. Qg5 Qxg5 10. O-O Bb4 11. Bh6 Be1 12. Kh1 Bxf2 13. h3