54.7M
positions
8.5M
practically solved
198.11T
engine nodes
1.6M
analyses
5,253
in queue
10
active workers
56
active cores
4.9M
nodes / sec
18.2
positions / min
131
proof number
3,717
disproof number
Root conquest: 0/20 first moves solved · 15.6% of tree positions solved · last 24h: 303,020 closures, 4.18T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 74 over 169 open obligations, of which 30 (17.8%) 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 3.2m (median of 127) · measured at 2026-09-17 13:00 UTC
Closures by source, last 24h (303020 of 303020 labelled): USER 99.8% (302363) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.2% (657) · last 7d (1344875 of 1344875): USER 94.0% (1263516) · 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. Nf3 f6 2. e4 e6 … 15. h4 Be6 16. fxe6 gxh4 17. Rh7 (User) · 128.0M nodes · auranvesdranor-j-002-atomicdb
- 1. Nf3 f6 2. Nd4 d6 … 8. Bb5 Kd8 9. d4 b6 10. e4 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … b6 10. O-O a5 11. Be7 Nh6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … b6 10. O-O a5 11. Be7 Nf6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … b6 10. O-O a5 11. Be7 Bd7 (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 | 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 35.5% of the fleet | 1.48T | 11,340 |
| 2 | BManBJ 33.2% of the fleet | 1.39T | 10,538 |
| 3 | tenzink 14.6% of the fleet | 612.01B | 3,074 |
| 4 | randomchampgamer 14.1% of the fleet | 591.26B | 4,645 |
| 5 | MoNiKaMaDnEsS 2.6% of the fleet | 108.46B | 627 |
| 6 | NeoArcturus <0.1% of the fleet | 128.0M | 1 |
6 accounts · 4.18T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 40.2% of the fleet | 79.65T | 677,611 |
| 2 | tenzink 16.8% of the fleet | 33.24T | 284,645 |
| 3 | auranvesdranor 10.5% of the fleet | 20.82T | 148,563 |
| 4 | BManBJ 10.1% of the fleet | 20.06T | 134,534 |
| 5 | JackIV 4.0% of the fleet | 7.94T | 56,572 |
| 6 | randomchampgamer 3.3% of the fleet | 6.51T | 45,996 |
| 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 · 198.13T 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 13:13 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … b6 10. O-O a5 11. Be7 Rh6
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 b6 10. O-O a5 11. Be7 Rh6 - Sep 17 13:13 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … b6 10. O-O a5 11. Be7 Kd7
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 b6 10. O-O a5 11. Be7 Kd7 - Sep 17 13:13 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … a5 11. Be7 Kd7 12. Ng5 d5
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 b6 10. O-O a5 11. Be7 Kd7 12. Ng5 d5 - Sep 17 13:13 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 10. O-O a5 11. Be7 Kd7 12. Ng5
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 b6 10. O-O a5 11. Be7 Kd7 12. Ng5 - Sep 17 13:13 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … a5 11. Be7 Kd7 12. Qa4 d5
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 b6 10. O-O a5 11. Be7 Kd7 12. Qa4 d5 - Sep 17 13:13 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 10. O-O a5 11. Be7 Kd7 12. Qa4
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 b6 10. O-O a5 11. Be7 Kd7 12. Qa4 - Sep 17 13:13 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … a5 11. Be7 Kd7 12. d5 Bb7
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 b6 10. O-O a5 11. Be7 Kd7 12. d5 Bb7 - Sep 17 13:13 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 10. O-O a5 11. Be7 Kd7 12. d5
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 b6 10. O-O a5 11. Be7 Kd7 12. d5 - Sep 17 13:13 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nd4 d6 … d5 8. axb5 Ne7 9. e4 Nc8
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 b5 7. a4 d5 8. axb5 Ne7 9. e4 Nc8 - Sep 17 13:13 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 d6 … 9. e4 Nc8 10. Ra6 Nb6 11. Bb5
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 b5 7. a4 d5 8. axb5 Ne7 9. e4 Nc8 10. Ra6 Nb6 11. Bb5 - Sep 17 13:13 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 d6 … Ne7 9. e4 Nc8 10. Ra6 Nb6
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 b5 7. a4 d5 8. axb5 Ne7 9. e4 Nc8 10. Ra6 Nb6 - Sep 17 13:13 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 d6 … 8. axb5 Ne7 9. e4 Nc8 10. Ra6
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 b5 7. a4 d5 8. axb5 Ne7 9. e4 Nc8 10. Ra6