54.5M
positions
8.5M
practically solved
197.76T
engine nodes
1.6M
analyses
3,283
in queue
11
active workers
72
active cores
22.4M
nodes / sec
21.6
positions / min
131
proof number
3,717
disproof number
Root conquest: 0/20 first moves solved · 15.6% of tree positions solved · last 24h: 309,423 closures, 4.20T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 74 over 167 open obligations, of which 29 (17.4%) 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 195) · measured at 2026-09-17 11:00 UTC
Closures by source, last 24h (309423 of 309423 labelled): USER 99.8% (308763) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.2% (660) · last 7d (1340141 of 1340141): USER 93.9% (1258782) · FILL 0.8% (11333) · AUTO 4.9% (65982) · SOLVE 0.0% (0) · NONE 0.3% (4044). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nh3 e6 2. e3 g6 … Nd3 23. bxc5 a5 24. f4 a4 (User) · 128.0M nodes · auranvesdranor-j-002-atomicdb
- 1. Nh3 f5 2. e3 e6 … Nh6 10. f3 Bd6 11. g3 Ke7 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … b6 10. Ne6 a5 11. h4 fxe4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … b6 10. Ne6 a5 11. h4 Ng4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. e3 d5 … e6 12. Ba3 Bb4 13. O-O-O d4 (User) · 10.00B nodes · BManBJ-Blake-atomicdb#2
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 | 1100 | 2 | |
| g1h3 | unsolved | 820 | 2 | |
| e2e3 | unsolved | 502 | 3 | |
| e2e4 | unsolved | 409 | 2 | |
| d2d4 | unsolved | 408 | 2 | |
| b1c3 | unsolved | 74 | 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 34.8% of the fleet | 1.46T | 11,193 |
| 2 | BManBJ 32.9% of the fleet | 1.38T | 10,577 |
| 3 | tenzink 14.6% of the fleet | 614.69B | 3,242 |
| 4 | randomchampgamer 14.1% of the fleet | 593.51B | 4,676 |
| 5 | MoNiKaMaDnEsS 2.6% of the fleet | 108.46B | 627 |
| 6 | NeoArcturus 1.0% of the fleet | 40.88B | 108 |
6 accounts · 4.20T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 40.3% of the fleet | 79.65T | 677,611 |
| 2 | tenzink 16.8% of the fleet | 33.20T | 284,492 |
| 3 | auranvesdranor 10.5% of the fleet | 20.72T | 147,847 |
| 4 | BManBJ 10.1% of the fleet | 19.96T | 133,834 |
| 5 | JackIV 4.0% of the fleet | 7.94T | 56,572 |
| 6 | randomchampgamer 3.3% of the fleet | 6.47T | 45,702 |
| 7 | RickEdinson 3.2% of the fleet | 6.32T | 41,667 |
| 8 | NeoArcturus 2.1% of the fleet | 4.09T | 16,751 |
| 9 | ijh 1.8% of the fleet | 3.57T | 37,348 |
| 10 | MoNiKaMaDnEsS 1.7% of the fleet | 3.45T | 21,978 |
and 22 more.
32 accounts · 197.86T 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 18 proposals · see every proposal
Milestones
- Sep 17 11:39 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … b6 10. Ne6 a5 11. h4 Nd5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 g6 6. d4 h5 7. Bxc6 Bh6 8. Bg5 Nf6 9. Nd8 b6 10. Ne6 a5 11. h4 Nd5 - Sep 17 11:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … a5 11. h4 Nd5 12. Qd3 Bxg5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 g6 6. d4 h5 7. Bxc6 Bh6 8. Bg5 Nf6 9. Nd8 b6 10. Ne6 a5 11. h4 Nd5 12. Qd3 Bxg5 - Sep 17 11:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 10. Ne6 a5 11. h4 Nd5 12. Qd3
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 g6 6. d4 h5 7. Bxc6 Bh6 8. Bg5 Nf6 9. Nd8 b6 10. Ne6 a5 11. h4 Nd5 12. Qd3 - Sep 17 11:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Nc6 14. exd5 Kf7 15. Qe8 Ke6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 g6 6. d4 h5 7. Bxc6 Bh6 8. Bg5 Nf6 9. Nd8 b6 10. Ne6 a5 11. h4 Nd5 12. Qd3 Bxg5 13. Qb5 Nc6 14. exd5 Kf7 15. Qe8 Ke6 - Sep 17 11:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 13. Qb5 Nc6 14. exd5 Kf7 15. Qe8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 g6 6. d4 h5 7. Bxc6 Bh6 8. Bg5 Nf6 9. Nd8 b6 10. Ne6 a5 11. h4 Nd5 12. Qd3 Bxg5 13. Qb5 Nc6 14. exd5 Kf7 15. Qe8 - Sep 17 11:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Bxg5 13. Qb5 Nc6 14. exd5 Kf7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 g6 6. d4 h5 7. Bxc6 Bh6 8. Bg5 Nf6 9. Nd8 b6 10. Ne6 a5 11. h4 Nd5 12. Qd3 Bxg5 13. Qb5 Nc6 14. exd5 Kf7 - Sep 17 11:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 12. Qd3 Bxg5 13. Qb5 Nc6 14. exd5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 g6 6. d4 h5 7. Bxc6 Bh6 8. Bg5 Nf6 9. Nd8 b6 10. Ne6 a5 11. h4 Nd5 12. Qd3 Bxg5 13. Qb5 Nc6 14. exd5 - Sep 17 11:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Nd5 12. Qd3 Bxg5 13. Qb5 Nc6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 g6 6. d4 h5 7. Bxc6 Bh6 8. Bg5 Nf6 9. Nd8 b6 10. Ne6 a5 11. h4 Nd5 12. Qd3 Bxg5 13. Qb5 Nc6 - Sep 17 11:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 11. h4 Nd5 12. Qd3 Bxg5 13. Qb5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 g6 6. d4 h5 7. Bxc6 Bh6 8. Bg5 Nf6 9. Nd8 b6 10. Ne6 a5 11. h4 Nd5 12. Qd3 Bxg5 13. Qb5 - Sep 17 11:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … a5 11. h4 Nd5 12. Qe2 Bxg5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 g6 6. d4 h5 7. Bxc6 Bh6 8. Bg5 Nf6 9. Nd8 b6 10. Ne6 a5 11. h4 Nd5 12. Qe2 Bxg5 - Sep 17 11:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 10. Ne6 a5 11. h4 Nd5 12. Qe2
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 g6 6. d4 h5 7. Bxc6 Bh6 8. Bg5 Nf6 9. Nd8 b6 10. Ne6 a5 11. h4 Nd5 12. Qe2 - Sep 17 11:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … a5 11. h4 Nd5 12. Ng7 Kf8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 g6 6. d4 h5 7. Bxc6 Bh6 8. Bg5 Nf6 9. Nd8 b6 10. Ne6 a5 11. h4 Nd5 12. Ng7 Kf8