70.7M
positions
12.9M
practically solved
254.43T
engine nodes
2.0M
analyses
4,176
in queue
14
active workers
81
active cores
15.1M
nodes / sec
28.8
positions / min
82
proof number
3,797
disproof number
Root conquest: 0/20 first moves solved · 18.2% of tree positions solved · last 24h: 443,373 closures, 7.34T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 81 over 198 open obligations, of which 30 (15.2%) 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 3.4h (median of 111) · measured at 2026-10-01 08:00 UTC
Closures by source, last 24h (443216 of 443216 labelled): USER 99.9% (442851) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.1% (365) · last 7d (2548300 of 2548367): USER 98.3% (2504333) · FILL 0.3% (8795) · AUTO 1.3% (32065) · SOLVE 0.0% (0) · NONE 0.1% (3107). 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 … 13. Qf6 Qxf6 14. Bh3 Rg8 15. Rg1 (User) · 128.0M nodes · auranvesdranor-admin-835912-atomicdb
- 1. Nh3 e6 2. e3 g6 … 13. Qf6 Qxf6 14. Bh3 Rg8 15. Rf1 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Kf8 11. Be8 e6 12. f4 Ng8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Kf8 11. Be8 e6 12. f4 Nd5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … Kf8 11. Be8 e6 12. f4 Nd7 (User) · 128.0M 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 | 1051 | 2 | |
| g1h3 | unsolved | 758 | 2 | |
| e2e3 | unsolved | 453 | 3 | |
| d2d4 | unsolved | 437 | 2 | |
| e2e4 | unsolved | 407 | 2 | |
| b1c3 | unsolved | 142 | 2 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b2b4 | unsolved | 0 | 3 | |
| b1a3 | unsolved | 0 | 3 | |
| h2h3 | unsolved | -98 | 2 | |
| a2a3 | unsolved | -103 | 2 | |
| d2d3 | unsolved | -116 | 2 | |
| f2f3 | unsolved | -117 | 3 | |
| b2b3 | unsolved | -169 | 1 | |
| f2f4 | unsolved | -302 | 3 | |
| h2h4 | unsolved | -500 | 2 | |
| a2a4 | unsolved | -510 | 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 | gannet 42.3% of the fleet | 3.10T | 23,798 |
| 2 | BManBJ 19.6% of the fleet | 1.44T | 11,195 |
| 3 | auranvesdranor 14.2% of the fleet | 1.04T | 7,900 |
| 4 | randomchampgamer 8.4% of the fleet | 615.92B | 4,948 |
| 5 | tenzink 8.1% of the fleet | 594.64B | 4,202 |
| 6 | RickEdinson 4.1% of the fleet | 297.94B | 2,096 |
| 7 | MoNiKaMaDnEsS 3.4% of the fleet | 246.66B | 1,972 |
| 8 | soothdest <0.1% of the fleet | 1.47B | 35 |
8 accounts · 7.34T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 35.5% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.1% of the fleet | 38.37T | 318,787 |
| 3 | BManBJ 12.4% of the fleet | 31.68T | 221,403 |
| 4 | auranvesdranor 11.7% of the fleet | 29.84T | 216,040 |
| 5 | randomchampgamer 4.4% of the fleet | 11.22T | 83,157 |
| 6 | JackIV 4.0% of the fleet | 10.06T | 67,859 |
| 7 | RickEdinson 2.9% of the fleet | 7.26T | 48,291 |
| 8 | gannet 2.8% of the fleet | 7.24T | 46,848 |
| 9 | MoNiKaMaDnEsS 1.9% of the fleet | 4.77T | 31,452 |
| 10 | NeoArcturus 1.6% of the fleet | 4.09T | 16,758 |
and 25 more.
35 accounts · 254.59T 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 · 16 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 · 4 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
Showing the 6 most voted of 21 proposals · see every proposal
Milestones
- Oct 01 08:39 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nc3 g6 … Rc8 12. e4 g5 13. Bd7 Kc7
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kd8 9. d4 a5 10. h3 h5 11. O-O Rc8 12. e4 g5 13. Bd7 Kc7 - Oct 01 08:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … Bc5 16. exd5 Kb8 17. Qc7 Ka7
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kd8 9. d4 a5 10. h3 h5 11. O-O Rc8 12. e4 g5 13. Bd7 Kc7 14. Qf3 Ra8 15. Qc3 Bc5 16. exd5 Kb8 17. Qc7 Ka7 - Oct 01 08:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 15. Qc3 Bc5 16. exd5 Kb8 17. Qc7
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kd8 9. d4 a5 10. h3 h5 11. O-O Rc8 12. e4 g5 13. Bd7 Kc7 14. Qf3 Ra8 15. Qc3 Bc5 16. exd5 Kb8 17. Qc7 - Oct 01 08:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … Ra8 15. Qc3 Bc5 16. exd5 Kb8
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kd8 9. d4 a5 10. h3 h5 11. O-O Rc8 12. e4 g5 13. Bd7 Kc7 14. Qf3 Ra8 15. Qc3 Bc5 16. exd5 Kb8 - Oct 01 08:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 14. Qf3 Ra8 15. Qc3 Bc5 16. exd5
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kd8 9. d4 a5 10. h3 h5 11. O-O Rc8 12. e4 g5 13. Bd7 Kc7 14. Qf3 Ra8 15. Qc3 Bc5 16. exd5 - Oct 01 08:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … Kc7 14. Qf3 Ra8 15. Qc3 Bc5
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kd8 9. d4 a5 10. h3 h5 11. O-O Rc8 12. e4 g5 13. Bd7 Kc7 14. Qf3 Ra8 15. Qc3 Bc5 - Oct 01 08:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 13. Bd7 Kc7 14. Qf3 Ra8 15. Qc3
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kd8 9. d4 a5 10. h3 h5 11. O-O Rc8 12. e4 g5 13. Bd7 Kc7 14. Qf3 Ra8 15. Qc3 - Oct 01 08:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … g5 13. Bd7 Kc7 14. Qf3 Ra8
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kd8 9. d4 a5 10. h3 h5 11. O-O Rc8 12. e4 g5 13. Bd7 Kc7 14. Qf3 Ra8 - Oct 01 08:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 12. e4 g5 13. Bd7 Kc7 14. Qf3
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kd8 9. d4 a5 10. h3 h5 11. O-O Rc8 12. e4 g5 13. Bd7 Kc7 14. Qf3 - Oct 01 08:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … g5 13. Bd7 Kc7 14. Qe2 Ra8
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kd8 9. d4 a5 10. h3 h5 11. O-O Rc8 12. e4 g5 13. Bd7 Kc7 14. Qe2 Ra8 - Oct 01 08:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 12. e4 g5 13. Bd7 Kc7 14. Qe2
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kd8 9. d4 a5 10. h3 h5 11. O-O Rc8 12. e4 g5 13. Bd7 Kc7 14. Qe2 - Oct 01 08:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … Ra8 15. Qb5 Kd8 16. Qb6 Ke7
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kd8 9. d4 a5 10. h3 h5 11. O-O Rc8 12. e4 g5 13. Bd7 Kc7 14. Qe2 Ra8 15. Qb5 Kd8 16. Qb6 Ke7