74.1M
positions
13.8M
practically solved
265.54T
engine nodes
2.1M
analyses
858
in queue
8
active workers
48
active cores
12.5M
nodes / sec
14.9
positions / min
82
proof number
3,797
disproof number
Root conquest: 0/20 first moves solved · 18.6% of tree positions solved · last 24h: 102,326 closures, 3.42T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 68 over 212 open obligations, of which 40 (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 3.1m (median of 11) · measured at 2026-10-04 01:00 UTC
Closures by source, last 24h (102326 of 102326 labelled): USER 99.1% (101380) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.9% (946) · last 7d (2297154 of 2297154): USER 99.7% (2291408) · FILL 0.0% (477) · AUTO 0.0% (1085) · SOLVE 0.0% (0) · NONE 0.2% (4184). 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. Nc3 d6 … 8. Qf3 Qg4 9. Qxg4 Na6 10. Nd5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 d6 … 8. Qf3 Qg4 9. Qxg4 Na6 10. b4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. Nc3 d6 … 8. Qf3 Qg4 9. Qxg4 Na6 10. h4 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 d6 … 8. Qf3 Qg4 9. Qxg4 Na6 10. d4 (User) · 128.0M nodes · randomchampgamer-2026PC-atomicdb
- 1. Nf3 f6 2. e4 e6 3. Nd4 h5 (User) · 2.00B nodes · RickEdinson-MSI-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 | 1101 | 2 | |
| g1h3 | unsolved | 724 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 440 | 2 | |
| e2e4 | unsolved | 418 | 2 | |
| b1c3 | unsolved | 114 | 2 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b1a3 | unsolved | 0 | 3 | |
| 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 | BManBJ 44.0% of the fleet | 1.50T | 11,150 |
| 2 | randomchampgamer 20.8% of the fleet | 710.38B | 5,183 |
| 3 | tenzink 19.9% of the fleet | 679.21B | 4,708 |
| 4 | RickEdinson 14.2% of the fleet | 485.82B | 3,298 |
| 5 | MoNiKaMaDnEsS 1.2% of the fleet | 41.03B | 322 |
5 accounts · 3.42T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 34.0% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.1% of the fleet | 40.16T | 331,602 |
| 3 | BManBJ 13.4% of the fleet | 35.72T | 252,155 |
| 4 | auranvesdranor 11.8% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 4.9% of the fleet | 13.01T | 96,843 |
| 6 | JackIV 3.8% of the fleet | 10.06T | 67,859 |
| 7 | RickEdinson 3.2% of the fleet | 8.51T | 57,097 |
| 8 | gannet 2.7% of the fleet | 7.24T | 46,848 |
| 9 | MoNiKaMaDnEsS 2.0% of the fleet | 5.21T | 34,838 |
| 10 | NeoArcturus 1.5% of the fleet | 4.09T | 16,758 |
and 25 more.
35 accounts · 265.61T 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 · 17 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 04 01:42 Solved: BLACK_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f6 … 10. Ne3 g4 11. Rb1 Qa6 12. Bd4
1. Nf3 d6 2. Ng5 f6 3. f3 Bh3 4. Nxh7 Be6 5. Nc3 c6 6. Nd5 Qa5 7. e4 g5 8. b4 Qa3 9. Bb2 Kd8 10. Ne3 g4 11. Rb1 Qa6 12. Bd4 - Oct 04 01:40 Solved: WHITE_WIN via MINIMAXview
deep line, ply ≥24 · … g4 d5 g5 Ke7
deep line, ply ≥24 · … g4 d5 g5 Ke7 - Oct 04 01:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … gxh2 19. Qh6 Kf7 20. Qg6 Kf8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Rc8 10. Nc3 Kf8 11. Bb5 Ne8 12. Bxh6 Kg7 13. Bd7 e5 14. Bxc8 g5 15. Qe2 a6 16. dxe5 g4 17. Qd2 g3 18. f3 gxh2 19. Qh6 Kf7 20. Qg6 Kf8 - Oct 04 01:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 18. f3 gxh2 19. Qh6 Kf7 20. Qg6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Rc8 10. Nc3 Kf8 11. Bb5 Ne8 12. Bxh6 Kg7 13. Bd7 e5 14. Bxc8 g5 15. Qe2 a6 16. dxe5 g4 17. Qd2 g3 18. f3 gxh2 19. Qh6 Kf7 20. Qg6 - Oct 04 01:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … g3 18. f3 gxh2 19. Qh6 Kf7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Rc8 10. Nc3 Kf8 11. Bb5 Ne8 12. Bxh6 Kg7 13. Bd7 e5 14. Bxc8 g5 15. Qe2 a6 16. dxe5 g4 17. Qd2 g3 18. f3 gxh2 19. Qh6 Kf7 - Oct 04 01:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 17. Qd2 g3 18. f3 gxh2 19. Qh6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Rc8 10. Nc3 Kf8 11. Bb5 Ne8 12. Bxh6 Kg7 13. Bd7 e5 14. Bxc8 g5 15. Qe2 a6 16. dxe5 g4 17. Qd2 g3 18. f3 gxh2 19. Qh6 - Oct 04 01:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … g4 17. Qd2 g3 18. f3 gxh2
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Rc8 10. Nc3 Kf8 11. Bb5 Ne8 12. Bxh6 Kg7 13. Bd7 e5 14. Bxc8 g5 15. Qe2 a6 16. dxe5 g4 17. Qd2 g3 18. f3 gxh2 - Oct 04 01:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 16. dxe5 g4 17. Qd2 g3 18. f3
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Rc8 10. Nc3 Kf8 11. Bb5 Ne8 12. Bxh6 Kg7 13. Bd7 e5 14. Bxc8 g5 15. Qe2 a6 16. dxe5 g4 17. Qd2 g3 18. f3 - Oct 04 01:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … a6 16. dxe5 g4 17. Qd2 g3
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Rc8 10. Nc3 Kf8 11. Bb5 Ne8 12. Bxh6 Kg7 13. Bd7 e5 14. Bxc8 g5 15. Qe2 a6 16. dxe5 g4 17. Qd2 g3 - Oct 04 01:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 15. Qe2 a6 16. dxe5 g4 17. Qd2
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Rc8 10. Nc3 Kf8 11. Bb5 Ne8 12. Bxh6 Kg7 13. Bd7 e5 14. Bxc8 g5 15. Qe2 a6 16. dxe5 g4 17. Qd2 - Oct 04 01:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … g5 15. Qe2 a6 16. dxe5 g4
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Rc8 10. Nc3 Kf8 11. Bb5 Ne8 12. Bxh6 Kg7 13. Bd7 e5 14. Bxc8 g5 15. Qe2 a6 16. dxe5 g4 - Oct 04 01:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 14. Bxc8 g5 15. Qe2 a6 16. dxe5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Rc8 10. Nc3 Kf8 11. Bb5 Ne8 12. Bxh6 Kg7 13. Bd7 e5 14. Bxc8 g5 15. Qe2 a6 16. dxe5