82.1M
positions
15.7M
practically solved
299.60T
engine nodes
2.3M
analyses
1,681
in queue
14
active workers
68
active cores
12.5M
nodes / sec
35.0
positions / min
85
proof number
4,552
disproof number
Root conquest: 0/20 first moves solved · 19.2% of tree positions solved · last 24h: 90,498 closures, 3.85T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 70 over 217 open obligations, of which 41 (18.9%) 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 28s (median of 1) · measured at 2026-10-12 03:00 UTC
Closures by source, last 24h (90442 of 90442 labelled): USER 80.6% (72855) · FILL 0.7% (625) · AUTO 18.7% (16931) · SOLVE 0.0% (0) · NONE 0.0% (31) · last 7d (1582036 of 1582092): USER 98.0% (1549770) · FILL 0.2% (2696) · AUTO 1.8% (28883) · SOLVE 0.0% (0) · NONE 0.0% (687). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nf3 d6 2. Ng5 f5 … a5 13. O-O Ra7 14. f4 a4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … a5 18. Qb5 g5 19. e5 Nxe8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … a5 18. Qb5 g5 19. e5 Nd7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 d6 2. Ng5 f5 … a5 18. Qb5 g5 19. e5 Ng4 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … Qc5 11. a4 Qxc4 12. d4 g5 (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 | 753 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| e2e4 | unsolved | 400 | 2 | |
| d2d4 | unsolved | 389 | 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 44.0% of the fleet | 1.69T | 13,601 |
| 2 | BManBJ 30.5% of the fleet | 1.17T | 10,076 |
| 3 | randomchampgamer 12.8% of the fleet | 492.25B | 3,641 |
| 4 | RickEdinson 10.2% of the fleet | 391.02B | 3,180 |
| 5 | MoNiKaMaDnEsS 2.5% of the fleet | 97.38B | 1,590 |
5 accounts · 3.85T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 30.1% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 15.7% of the fleet | 47.09T | 328,019 |
| 3 | tenzink 14.3% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.5% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 6.1% of the fleet | 18.16T | 130,741 |
| 6 | Torom 4.4% of the fleet | 13.22T | 96,900 |
| 7 | RickEdinson 4.0% of the fleet | 12.12T | 80,271 |
| 8 | JackIV 3.4% of the fleet | 10.06T | 67,859 |
| 9 | gannet 2.4% of the fleet | 7.24T | 46,848 |
| 10 | MoNiKaMaDnEsS 2.3% of the fleet | 6.81T | 46,112 |
and 25 more.
35 accounts · 299.82T 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 12 03:58 Solved: BLACK_WIN via MINIMAXview
1. e4 c6 2. Nf3 e5 … 15. O-O Rae8 16. Qa4 Re2 17. Qxa7
1. e4 c6 2. Nf3 e5 3. Nc3 f6 4. Nd5 cxd5 5. Bb5 g6 6. d4 Nc6 7. Be3 Bb4 8. c3 Nh6 9. Ng5 d5 10. dxe5 f5 11. f3 Ng4 12. Nf7 O-O 13. Bh6 Nxh6 14. Nxd8 fxe4 15. O-O Rae8 16. Qa4 Re2 17. Qxa7 - Oct 12 03:58 Solved: BLACK_WIN via MATE_PVview
1. e4 c6 2. Nf3 e5 … 17. Qxa7 Rfe8 18. Bxe2 Re2 19. cxb4
1. e4 c6 2. Nf3 e5 3. Nc3 f6 4. Nd5 cxd5 5. Bb5 g6 6. d4 Nc6 7. Be3 Bb4 8. c3 Nh6 9. Ng5 d5 10. dxe5 f5 11. f3 Ng4 12. Nf7 O-O 13. Bh6 Nxh6 14. Nxd8 fxe4 15. O-O Rae8 16. Qa4 Re2 17. Qxa7 Rfe8 18. Bxe2 Re2 19. cxb4 - Oct 12 03:58 Solved: BLACK_WIN via MATE_PVview
1. e4 c6 2. Nf3 e5 … Re2 17. Qxa7 Rfe8 18. Bxe2 Re2
1. e4 c6 2. Nf3 e5 3. Nc3 f6 4. Nd5 cxd5 5. Bb5 g6 6. d4 Nc6 7. Be3 Bb4 8. c3 Nh6 9. Ng5 d5 10. dxe5 f5 11. f3 Ng4 12. Nf7 O-O 13. Bh6 Nxh6 14. Nxd8 fxe4 15. O-O Rae8 16. Qa4 Re2 17. Qxa7 Rfe8 18. Bxe2 Re2 - Oct 12 03:58 Solved: BLACK_WIN via MATE_PVview
1. e4 c6 2. Nf3 e5 … 16. Qa4 Re2 17. Qxa7 Rfe8 18. Bxe2
1. e4 c6 2. Nf3 e5 3. Nc3 f6 4. Nd5 cxd5 5. Bb5 g6 6. d4 Nc6 7. Be3 Bb4 8. c3 Nh6 9. Ng5 d5 10. dxe5 f5 11. f3 Ng4 12. Nf7 O-O 13. Bh6 Nxh6 14. Nxd8 fxe4 15. O-O Rae8 16. Qa4 Re2 17. Qxa7 Rfe8 18. Bxe2 - Oct 12 03:58 Solved: BLACK_WIN via MATE_PVview
1. e4 c6 2. Nf3 e5 … Rae8 16. Qa4 Re2 17. Qxa7 Rfe8
1. e4 c6 2. Nf3 e5 3. Nc3 f6 4. Nd5 cxd5 5. Bb5 g6 6. d4 Nc6 7. Be3 Bb4 8. c3 Nh6 9. Ng5 d5 10. dxe5 f5 11. f3 Ng4 12. Nf7 O-O 13. Bh6 Nxh6 14. Nxd8 fxe4 15. O-O Rae8 16. Qa4 Re2 17. Qxa7 Rfe8 - Oct 12 03:58 Solved: BLACK_WIN via MATE_PVview
1. e4 c6 2. Nf3 e5 … Rae8 16. Qa4 Re2 17. Qxa7 Bd6
1. e4 c6 2. Nf3 e5 3. Nc3 f6 4. Nd5 cxd5 5. Bb5 g6 6. d4 Nc6 7. Be3 Bb4 8. c3 Nh6 9. Ng5 d5 10. dxe5 f5 11. f3 Ng4 12. Nf7 O-O 13. Bh6 Nxh6 14. Nxd8 fxe4 15. O-O Rae8 16. Qa4 Re2 17. Qxa7 Bd6 - Oct 12 03:58 Solved: BLACK_WIN via MINIMAXview
1. e4 c6 2. Nf3 e5 … 15. O-O Rae8 16. Qa4 Re2 17. Qa6
1. e4 c6 2. Nf3 e5 3. Nc3 f6 4. Nd5 cxd5 5. Bb5 g6 6. d4 Nc6 7. Be3 Bb4 8. c3 Nh6 9. Ng5 d5 10. dxe5 f5 11. f3 Ng4 12. Nf7 O-O 13. Bh6 Nxh6 14. Nxd8 fxe4 15. O-O Rae8 16. Qa4 Re2 17. Qa6 - Oct 12 03:58 Solved: BLACK_WIN via MATE_PVview
1. e4 c6 2. Nf3 e5 … 16. Qa4 Re2 17. Qxa7 Rf2 18. cxb4
1. e4 c6 2. Nf3 e5 3. Nc3 f6 4. Nd5 cxd5 5. Bb5 g6 6. d4 Nc6 7. Be3 Bb4 8. c3 Nh6 9. Ng5 d5 10. dxe5 f5 11. f3 Ng4 12. Nf7 O-O 13. Bh6 Nxh6 14. Nxd8 fxe4 15. O-O Rae8 16. Qa4 Re2 17. Qxa7 Rf2 18. cxb4 - Oct 12 03:58 Solved: BLACK_WIN via MATE_PVview
1. e4 c6 2. Nf3 e5 … Rae8 16. Qa4 Re2 17. Qxa7 Rf2
1. e4 c6 2. Nf3 e5 3. Nc3 f6 4. Nd5 cxd5 5. Bb5 g6 6. d4 Nc6 7. Be3 Bb4 8. c3 Nh6 9. Ng5 d5 10. dxe5 f5 11. f3 Ng4 12. Nf7 O-O 13. Bh6 Nxh6 14. Nxd8 fxe4 15. O-O Rae8 16. Qa4 Re2 17. Qxa7 Rf2 - Oct 12 03:58 Solved: BLACK_WIN via MATE_PVview
1. e4 c6 2. Nf3 e5 … Rae8 16. Qa4 Re2 17. Qa6 Bd6
1. e4 c6 2. Nf3 e5 3. Nc3 f6 4. Nd5 cxd5 5. Bb5 g6 6. d4 Nc6 7. Be3 Bb4 8. c3 Nh6 9. Ng5 d5 10. dxe5 f5 11. f3 Ng4 12. Nf7 O-O 13. Bh6 Nxh6 14. Nxd8 fxe4 15. O-O Rae8 16. Qa4 Re2 17. Qa6 Bd6 - Oct 12 03:58 Solved: BLACK_WIN via MATE_PVview
1. e4 c6 2. Nf3 e5 … 16. Qa4 Re2 17. Qxa7 Bc5 18. Bxc6
1. e4 c6 2. Nf3 e5 3. Nc3 f6 4. Nd5 cxd5 5. Bb5 g6 6. d4 Nc6 7. Be3 Bb4 8. c3 Nh6 9. Ng5 d5 10. dxe5 f5 11. f3 Ng4 12. Nf7 O-O 13. Bh6 Nxh6 14. Nxd8 fxe4 15. O-O Rae8 16. Qa4 Re2 17. Qxa7 Bc5 18. Bxc6 - Oct 12 03:58 Solved: BLACK_WIN via MATE_PVview
1. e4 c6 2. Nf3 e5 … Rae8 16. Qa4 Re2 17. Qxa7 Bc5
1. e4 c6 2. Nf3 e5 3. Nc3 f6 4. Nd5 cxd5 5. Bb5 g6 6. d4 Nc6 7. Be3 Bb4 8. c3 Nh6 9. Ng5 d5 10. dxe5 f5 11. f3 Ng4 12. Nf7 O-O 13. Bh6 Nxh6 14. Nxd8 fxe4 15. O-O Rae8 16. Qa4 Re2 17. Qxa7 Bc5