73.3M
positions
13.7M
practically solved
262.01T
engine nodes
2.0M
analyses
7,458
in queue
7
active workers
44
active cores
6.1M
nodes / sec
17.5
positions / min
82
proof number
3,797
disproof number
Root conquest: 0/20 first moves solved · 18.6% of tree positions solved · last 24h: 368,370 closures, 4.22T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 73 over 204 open obligations, of which 37 (18.1%) 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 8.6h (median of 116) · measured at 2026-10-03 00:00 UTC
Closures by source, last 24h (368359 of 368359 labelled): USER 99.7% (367315) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.3% (1044) · last 7d (2768995 of 2769006): USER 98.6% (2729262) · FILL 0.3% (8452) · AUTO 1.0% (26873) · SOLVE 0.0% (0) · NONE 0.2% (4408). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Na3 e5 2. Nf3 Qg5 … Nf7 7. c3 Rc8 8. d4 Ng5 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nh3 h6 2. d4 e6 … 9. Nf4 d5 10. Nb5 axb5 11. g4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … 24. d5 b5 25. Rd1 b4 26. Rf1 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Na3 e5 2. Nf3 Qg5 … 7. axb5 Be7 8. e3 Rb4 9. c3 (User) · 128.0M nodes · randomchampgamer-2026PC-atomicdb
- 1. Nh3 h6 2. d4 e6 … 9. Nf4 d5 10. Nb5 axb5 11. f3 (User) · 128.0M nodes · tenzink-compute-vm-4-8-20-ssd-1785501211339-chess-atomicdb#0
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 | 1101 | 2 | |
| g1h3 | unsolved | 725 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 439 | 2 | |
| e2e4 | unsolved | 417 | 2 | |
| b1c3 | unsolved | 110 | 2 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b2b4 | unsolved | 0 | 3 | |
| b1a3 | unsolved | 0 | 3 | |
| h2h3 | unsolved | -97 | 2 | |
| d2d3 | unsolved | -98 | 2 | |
| a2a3 | unsolved | -100 | 2 | |
| f2f3 | unsolved | -117 | 3 | |
| b2b3 | unsolved | -144 | 1 | |
| f2f4 | unsolved | -305 | 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 | BManBJ 35.7% of the fleet | 1.51T | 11,485 |
| 2 | auranvesdranor 20.4% of the fleet | 859.11B | 6,598 |
| 3 | randomchampgamer 15.3% of the fleet | 643.33B | 5,155 |
| 4 | tenzink 15.3% of the fleet | 643.31B | 4,794 |
| 5 | RickEdinson 10.6% of the fleet | 445.65B | 3,276 |
| 6 | MoNiKaMaDnEsS 2.5% of the fleet | 105.86B | 829 |
| 7 | quasa 0.2% of the fleet | 7.94B | 62 |
| 8 | soothdest 0.1% of the fleet | 5.48B | 51 |
8 accounts · 4.22T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 34.5% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.1% of the fleet | 39.45T | 326,646 |
| 3 | BManBJ 13.0% of the fleet | 34.20T | 240,870 |
| 4 | auranvesdranor 12.0% of the fleet | 31.39T | 227,912 |
| 5 | randomchampgamer 4.7% of the fleet | 12.27T | 91,423 |
| 6 | JackIV 3.8% of the fleet | 10.06T | 67,859 |
| 7 | RickEdinson 3.1% of the fleet | 8.00T | 53,653 |
| 8 | gannet 2.8% of the fleet | 7.24T | 46,848 |
| 9 | MoNiKaMaDnEsS 2.0% of the fleet | 5.17T | 34,516 |
| 10 | NeoArcturus 1.6% of the fleet | 4.09T | 16,758 |
and 25 more.
35 accounts · 262.08T 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 03 00:35 LANE_CAP_HIT
- Oct 03 00:35 Solved: WHITE_WIN via MINIMAXview
1. Nh3 c6 2. Ng5 f6 … e6 10. h3 b5 11. Kf2 Na6
1. Nh3 c6 2. Ng5 f6 3. Nc3 d6 4. Nxh7 Qa5 5. f3 Kd8 6. e4 Bf5 7. d3 g5 8. g3 Qc7 9. Nd5 e6 10. h3 b5 11. Kf2 Na6 - Oct 03 00:35 LANE_CAP_HIT
- Oct 03 00:35 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … f5 11. exf5 Kd8 12. Qb7 Rc7
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 Rc8 6. e4 h5 7. c3 b5 8. Bc4 Rh6 9. Bf7 Ke7 10. Qf3 f5 11. exf5 Kd8 12. Qb7 Rc7 - Oct 03 00:35 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … 10. Qf3 f5 11. exf5 Kd8 12. Qb7
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 Rc8 6. e4 h5 7. c3 b5 8. Bc4 Rh6 9. Bf7 Ke7 10. Qf3 f5 11. exf5 Kd8 12. Qb7 - Oct 03 00:35 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … Ke7 10. Qf3 f5 11. exf5 Kd8
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 Rc8 6. e4 h5 7. c3 b5 8. Bc4 Rh6 9. Bf7 Ke7 10. Qf3 f5 11. exf5 Kd8 - Oct 03 00:35 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … 9. Bf7 Ke7 10. Qf3 f5 11. exf5
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 Rc8 6. e4 h5 7. c3 b5 8. Bc4 Rh6 9. Bf7 Ke7 10. Qf3 f5 11. exf5 - Oct 03 00:35 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … Rh6 9. Bf7 Ke7 10. Qf3 f5
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 Rc8 6. e4 h5 7. c3 b5 8. Bc4 Rh6 9. Bf7 Ke7 10. Qf3 f5 - Oct 03 00:35 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … 8. Bc4 Rh6 9. Bf7 Ke7 10. Qf3
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 Rc8 6. e4 h5 7. c3 b5 8. Bc4 Rh6 9. Bf7 Ke7 10. Qf3 - Oct 03 00:35 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … b5 8. Bc4 Rh6 9. Bf7 Ke7
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 Rc8 6. e4 h5 7. c3 b5 8. Bc4 Rh6 9. Bf7 Ke7 - Oct 03 00:35 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … f5 12. exf5 Kd8 13. Qb7 e4
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 Rc8 6. e4 h5 7. c3 b5 8. Bc4 Rh6 9. Bf7 Kd7 10. Be6 Ke7 11. Qf3 f5 12. exf5 Kd8 13. Qb7 e4 - Oct 03 00:35 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … 11. Qf3 f5 12. exf5 Kd8 13. Qb7
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 Rc8 6. e4 h5 7. c3 b5 8. Bc4 Rh6 9. Bf7 Kd7 10. Be6 Ke7 11. Qf3 f5 12. exf5 Kd8 13. Qb7