80.4M
positions
15.5M
practically solved
291.11T
engine nodes
2.2M
analyses
3,150
in queue
7
active workers
42
active cores
14.6M
nodes / sec
10.7
positions / min
82
proof number
4,106
disproof number
Root conquest: 0/20 first moves solved · 19.3% of tree positions solved · last 24h: 255,694 closures, 4.57T 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 12.2h (median of 31) · measured at 2026-10-10 05:00 UTC
Closures by source, last 24h (255694 of 255694 labelled): USER 100.0% (255636) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.0% (58) · last 7d (1664236 of 1664236): USER 99.0% (1647607) · FILL 0.1% (2071) · AUTO 0.7% (11952) · SOLVE 0.0% (0) · NONE 0.2% (2606). 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 … Nb2 25. b5 Bc5 26. c4 e5 (User) · 512.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … 22. b3 Na5 23. g3 Kh7 24. c4 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. e4 e6 … h5 24. c4 Bg5 25. g4 Bf6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. e4 e6 … h5 25. c4 Bc5 26. Ba3 a6 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … 25. b5 h5 26. a4 a5 27. c4 (User) · 512.0M 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 | 1094 | 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 41.3% of the fleet | 1.89T | 12,733 |
| 2 | BManBJ 30.3% of the fleet | 1.38T | 8,336 |
| 3 | randomchampgamer 14.9% of the fleet | 680.55B | 4,432 |
| 4 | RickEdinson 9.8% of the fleet | 446.54B | 2,634 |
| 5 | MoNiKaMaDnEsS 3.7% of the fleet | 170.22B | 949 |
| 6 | soothdest <0.1% of the fleet | 8.0M | 17 |
6 accounts · 4.57T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 31.0% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 15.4% of the fleet | 44.74T | 312,139 |
| 3 | tenzink 14.7% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.8% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 5.9% of the fleet | 17.09T | 124,817 |
| 6 | RickEdinson 3.9% of the fleet | 11.35T | 75,449 |
| 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 | 6.37T | 42,957 |
and 25 more.
35 accounts · 291.24T 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 10 05:54 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … Be2 18. Bh7 bxc2 19. g4 Rfe8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 g6 5. Nxd6 b5 6. d4 Nf6 7. Bh6 Bxh6 8. exf5 O-O 9. f3 b4 10. Bc4 Kh8 11. Na3 Bf5 12. Qe2 Be4 13. Bg8 h6 14. Qb5 Nc6 15. Nc4 b3 16. a3 Bd3 17. Ne5 Be2 18. Bh7 bxc2 19. g4 Rfe8 - Oct 10 05:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Rfe8 20. Qb3 Bc4 21. Nf7 Bxf7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 g6 5. Nxd6 b5 6. d4 Nf6 7. Bh6 Bxh6 8. exf5 O-O 9. f3 b4 10. Bc4 Kh8 11. Na3 Bf5 12. Qe2 Be4 13. Bg8 h6 14. Qb5 Nc6 15. Nc4 b3 16. a3 Bd3 17. Ne5 Be2 18. Bh7 bxc2 19. g4 Rfe8 20. Qb3 Bc4 21. Nf7 Bxf7 - Oct 10 05:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 19. g4 Rfe8 20. Qb3 Bc4 21. Nf7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 g6 5. Nxd6 b5 6. d4 Nf6 7. Bh6 Bxh6 8. exf5 O-O 9. f3 b4 10. Bc4 Kh8 11. Na3 Bf5 12. Qe2 Be4 13. Bg8 h6 14. Qb5 Nc6 15. Nc4 b3 16. a3 Bd3 17. Ne5 Be2 18. Bh7 bxc2 19. g4 Rfe8 20. Qb3 Bc4 21. Nf7 - Oct 10 05:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … bxc2 19. g4 Rfe8 20. Qb3 Bc4
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 g6 5. Nxd6 b5 6. d4 Nf6 7. Bh6 Bxh6 8. exf5 O-O 9. f3 b4 10. Bc4 Kh8 11. Na3 Bf5 12. Qe2 Be4 13. Bg8 h6 14. Qb5 Nc6 15. Nc4 b3 16. a3 Bd3 17. Ne5 Be2 18. Bh7 bxc2 19. g4 Rfe8 20. Qb3 Bc4 - Oct 10 05:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 18. Bh7 bxc2 19. g4 Rfe8 20. Qb3
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 g6 5. Nxd6 b5 6. d4 Nf6 7. Bh6 Bxh6 8. exf5 O-O 9. f3 b4 10. Bc4 Kh8 11. Na3 Bf5 12. Qe2 Be4 13. Bg8 h6 14. Qb5 Nc6 15. Nc4 b3 16. a3 Bd3 17. Ne5 Be2 18. Bh7 bxc2 19. g4 Rfe8 20. Qb3 - Oct 10 05:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … bxc2 19. g4 Rfe8 20. Nf7 Kg7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 g6 5. Nxd6 b5 6. d4 Nf6 7. Bh6 Bxh6 8. exf5 O-O 9. f3 b4 10. Bc4 Kh8 11. Na3 Bf5 12. Qe2 Be4 13. Bg8 h6 14. Qb5 Nc6 15. Nc4 b3 16. a3 Bd3 17. Ne5 Be2 18. Bh7 bxc2 19. g4 Rfe8 20. Nf7 Kg7 - Oct 10 05:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 18. Bh7 bxc2 19. g4 Rfe8 20. Nf7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 g6 5. Nxd6 b5 6. d4 Nf6 7. Bh6 Bxh6 8. exf5 O-O 9. f3 b4 10. Bc4 Kh8 11. Na3 Bf5 12. Qe2 Be4 13. Bg8 h6 14. Qb5 Nc6 15. Nc4 b3 16. a3 Bd3 17. Ne5 Be2 18. Bh7 bxc2 19. g4 Rfe8 20. Nf7 - Oct 10 05:54 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … Be2 18. Bh7 bxc2 19. g4 Rfd8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 g6 5. Nxd6 b5 6. d4 Nf6 7. Bh6 Bxh6 8. exf5 O-O 9. f3 b4 10. Bc4 Kh8 11. Na3 Bf5 12. Qe2 Be4 13. Bg8 h6 14. Qb5 Nc6 15. Nc4 b3 16. a3 Bd3 17. Ne5 Be2 18. Bh7 bxc2 19. g4 Rfd8 - Oct 10 05:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Rfd8 20. Qb3 Bc4 21. Nf7 Bxf7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 g6 5. Nxd6 b5 6. d4 Nf6 7. Bh6 Bxh6 8. exf5 O-O 9. f3 b4 10. Bc4 Kh8 11. Na3 Bf5 12. Qe2 Be4 13. Bg8 h6 14. Qb5 Nc6 15. Nc4 b3 16. a3 Bd3 17. Ne5 Be2 18. Bh7 bxc2 19. g4 Rfd8 20. Qb3 Bc4 21. Nf7 Bxf7 - Oct 10 05:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 19. g4 Rfd8 20. Qb3 Bc4 21. Nf7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 g6 5. Nxd6 b5 6. d4 Nf6 7. Bh6 Bxh6 8. exf5 O-O 9. f3 b4 10. Bc4 Kh8 11. Na3 Bf5 12. Qe2 Be4 13. Bg8 h6 14. Qb5 Nc6 15. Nc4 b3 16. a3 Bd3 17. Ne5 Be2 18. Bh7 bxc2 19. g4 Rfd8 20. Qb3 Bc4 21. Nf7 - Oct 10 05:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … bxc2 19. g4 Rfd8 20. Qb3 Bc4
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 g6 5. Nxd6 b5 6. d4 Nf6 7. Bh6 Bxh6 8. exf5 O-O 9. f3 b4 10. Bc4 Kh8 11. Na3 Bf5 12. Qe2 Be4 13. Bg8 h6 14. Qb5 Nc6 15. Nc4 b3 16. a3 Bd3 17. Ne5 Be2 18. Bh7 bxc2 19. g4 Rfd8 20. Qb3 Bc4 - Oct 10 05:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 18. Bh7 bxc2 19. g4 Rfd8 20. Qb3
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 g6 5. Nxd6 b5 6. d4 Nf6 7. Bh6 Bxh6 8. exf5 O-O 9. f3 b4 10. Bc4 Kh8 11. Na3 Bf5 12. Qe2 Be4 13. Bg8 h6 14. Qb5 Nc6 15. Nc4 b3 16. a3 Bd3 17. Ne5 Be2 18. Bh7 bxc2 19. g4 Rfd8 20. Qb3