55.7M
positions
8.8M
practically solved
201.60T
engine nodes
1.6M
analyses
5,562
in queue
13
active workers
88
active cores
5.4M
nodes / sec
29.7
positions / min
131
proof number
3,717
disproof number
Root conquest: 0/20 first moves solved · 15.9% of tree positions solved · last 24h: 382,253 closures, 5.36T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 75 over 168 open obligations, of which 30 (17.9%) 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 2.0h (median of 204) · measured at 2026-09-18 03:00 UTC
Closures by source, last 24h (382204 of 382206 labelled): USER 99.9% (381740) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.1% (464) · last 7d (1516475 of 1516475): USER 96.5% (1462750) · FILL 0.5% (7163) · AUTO 2.8% (42690) · SOLVE 0.0% (0) · NONE 0.3% (3872). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nh3 f5 2. e3 e6 … Bd6 12. g3 Ng8 13. Be2 Bf8 (User) · 128.0M nodes · auranvesdranor-admin-835912-atomicdb
- 1. Nf3 f6 2. Nc3 d6 … 12. Qe2 Be7 13. g3 Rf8 14. Be8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 d6 … a4 12. Qe2 d5 13. e5 Bd6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. e4 e6 … d5 25. Rcd1 Rd8 26. c4 d4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. e4 e6 … 20. c4 a5 21. h5 Rc8 22. c5 (User) · 128.0M nodes · BManBJ-Laptop-Blake-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 | 1091 | 2 | |
| g1h3 | unsolved | 820 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| e2e4 | unsolved | 415 | 2 | |
| d2d4 | unsolved | 408 | 2 | |
| b1c3 | unsolved | 71 | 2 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b2b4 | unsolved | 0 | 3 | |
| b1a3 | unsolved | 0 | 3 | |
| h2h3 | unsolved | -100 | 2 | |
| a2a3 | unsolved | -103 | 2 | |
| f2f3 | unsolved | -110 | 2 | |
| d2d3 | unsolved | -116 | 2 | |
| b2b3 | unsolved | -119 | 1 | |
| f2f4 | unsolved | -223 | 3 | |
| h2h4 | unsolved | -500 | 2 | |
| a2a4 | unsolved | -502 | 2 | |
| g2g4 | unsolved | -600 | 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 | auranvesdranor 28.5% of the fleet | 1.52T | 11,595 |
| 2 | BManBJ 26.2% of the fleet | 1.40T | 10,747 |
| 3 | Torom 19.2% of the fleet | 1.03T | 6,932 |
| 4 | tenzink 11.8% of the fleet | 629.66B | 3,528 |
| 5 | randomchampgamer 11.1% of the fleet | 593.91B | 4,725 |
| 6 | MoNiKaMaDnEsS 3.4% of the fleet | 179.55B | 1,066 |
6 accounts · 5.36T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 39.5% of the fleet | 79.65T | 677,611 |
| 2 | tenzink 16.7% of the fleet | 33.63T | 286,941 |
| 3 | auranvesdranor 10.7% of the fleet | 21.64T | 154,825 |
| 4 | BManBJ 10.4% of the fleet | 20.90T | 141,063 |
| 5 | JackIV 3.9% of the fleet | 7.94T | 56,572 |
| 6 | randomchampgamer 3.4% of the fleet | 6.87T | 48,879 |
| 7 | RickEdinson 3.1% of the fleet | 6.32T | 41,667 |
| 8 | NeoArcturus 2.0% of the fleet | 4.09T | 16,751 |
| 9 | MoNiKaMaDnEsS 1.8% of the fleet | 3.63T | 23,044 |
| 10 | ijh 1.8% of the fleet | 3.57T | 37,348 |
and 22 more.
32 accounts · 201.75T 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 · 15 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
- Refuting 1... d61. Nf3 d6 2. Nc3proposed by randomchampgamer · 3 votes
- The weaker of the two f-pawn advances for 1. ...d61. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4proposed by MoNiKaMaDnEsS · 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
- Is Nh3 h6 e3 e6 Nc3 a draw?1. Nh3 e6 2. e3 h6 3. Nc3proposed by soothdest · 3 votes
Showing the 6 most voted of 19 proposals · see every proposal
Milestones
- Sep 18 03:47 Solved: WHITE_WIN via MINIMAXview
1. Nh3 e6 2. e3 g6 … c5 15. axb4 c4 16. b4 Kf7
1. Nh3 e6 2. e3 g6 3. Nc3 h6 4. Nf4 Bb4 5. Nh5 c6 6. Qf3 f5 7. Ng7 Kf8 8. Qf4 Qh4 9. Qxh4 b6 10. f4 d5 11. d3 d4 12. g4 h5 13. g5 Ba6 14. a3 c5 15. axb4 c4 16. b4 Kf7 - Sep 18 03:47 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nc3 d6 … d5 12. Qe2 Ra6 13. Bxa6 Ba3
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 Kg8 8. Bb5 g6 9. d4 a5 10. O-O Kh8 11. Kh1 d5 12. Qe2 Ra6 13. Bxa6 Ba3 - Sep 18 03:47 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … d3 18. Qf3 fxe5 19. Qf8 Kh7
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 Kg8 8. Bb5 g6 9. d4 a5 10. O-O Kh8 11. Kh1 d5 12. Qe2 Ra6 13. Bxa6 Ba3 14. h3 b5 15. bxa3 e5 16. dxe5 d4 17. e5 d3 18. Qf3 fxe5 19. Qf8 Kh7 - Sep 18 03:47 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 17. e5 d3 18. Qf3 fxe5 19. Qf8
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 Kg8 8. Bb5 g6 9. d4 a5 10. O-O Kh8 11. Kh1 d5 12. Qe2 Ra6 13. Bxa6 Ba3 14. h3 b5 15. bxa3 e5 16. dxe5 d4 17. e5 d3 18. Qf3 fxe5 19. Qf8 - Sep 18 03:47 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … d4 17. e5 d3 18. Qf3 fxe5
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 Kg8 8. Bb5 g6 9. d4 a5 10. O-O Kh8 11. Kh1 d5 12. Qe2 Ra6 13. Bxa6 Ba3 14. h3 b5 15. bxa3 e5 16. dxe5 d4 17. e5 d3 18. Qf3 fxe5 - Sep 18 03:47 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 16. dxe5 d4 17. e5 d3 18. Qf3
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 Kg8 8. Bb5 g6 9. d4 a5 10. O-O Kh8 11. Kh1 d5 12. Qe2 Ra6 13. Bxa6 Ba3 14. h3 b5 15. bxa3 e5 16. dxe5 d4 17. e5 d3 18. Qf3 - Sep 18 03:47 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … e5 16. dxe5 d4 17. e5 d3
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 Kg8 8. Bb5 g6 9. d4 a5 10. O-O Kh8 11. Kh1 d5 12. Qe2 Ra6 13. Bxa6 Ba3 14. h3 b5 15. bxa3 e5 16. dxe5 d4 17. e5 d3 - Sep 18 03:47 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 15. bxa3 e5 16. dxe5 d4 17. e5
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 Kg8 8. Bb5 g6 9. d4 a5 10. O-O Kh8 11. Kh1 d5 12. Qe2 Ra6 13. Bxa6 Ba3 14. h3 b5 15. bxa3 e5 16. dxe5 d4 17. e5 - Sep 18 03:47 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … b5 15. bxa3 e5 16. dxe5 d4
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 Kg8 8. Bb5 g6 9. d4 a5 10. O-O Kh8 11. Kh1 d5 12. Qe2 Ra6 13. Bxa6 Ba3 14. h3 b5 15. bxa3 e5 16. dxe5 d4 - Sep 18 03:47 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 14. h3 b5 15. bxa3 e5 16. dxe5
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 Kg8 8. Bb5 g6 9. d4 a5 10. O-O Kh8 11. Kh1 d5 12. Qe2 Ra6 13. Bxa6 Ba3 14. h3 b5 15. bxa3 e5 16. dxe5 - Sep 18 03:47 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … Ba3 14. h3 b5 15. bxa3 e5
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 Kg8 8. Bb5 g6 9. d4 a5 10. O-O Kh8 11. Kh1 d5 12. Qe2 Ra6 13. Bxa6 Ba3 14. h3 b5 15. bxa3 e5 - Sep 18 03:47 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 13. Bxa6 Ba3 14. h3 b5 15. bxa3
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 Kg8 8. Bb5 g6 9. d4 a5 10. O-O Kh8 11. Kh1 d5 12. Qe2 Ra6 13. Bxa6 Ba3 14. h3 b5 15. bxa3