56.1M
positions
8.9M
practically solved
203.17T
engine nodes
1.6M
analyses
1,374
in queue
9
active workers
56
active cores
4.9M
nodes / sec
17.1
positions / min
131
proof number
3,717
disproof number
Root conquest: 0/20 first moves solved · 15.9% of tree positions solved · last 24h: 406,617 closures, 5.57T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 over 169 open obligations, of which 31 (18.3%) 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 9.2h (median of 142) · measured at 2026-09-18 10:00 UTC
Closures by source, last 24h (406570 of 406604 labelled): USER 99.9% (406149) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.1% (421) · last 7d (1593635 of 1593648): USER 98.1% (1562593) · FILL 0.3% (4432) · AUTO 1.4% (22815) · SOLVE 0.0% (0) · NONE 0.2% (3795). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nh3 f5 2. e3 e6 … 13. e4 Rc8 14. Bd2 f4 15. Bc1 (User) · 128.0M nodes · auranvesdranor-admin-835912-atomicdb
- 1. Nh3 h6 2. d4 e6 … 16. Nf4 h4 17. d6 Ng4 18. fxg4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. Ne5 fxe5 … Na6 7. Nc3 Bg7 8. Qxg7 Nc5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nh3 f5 2. e3 e6 … 13. e4 Rc8 14. Bd2 f4 15. a4 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Na3 e5 2. Nf3 Qg5 … a6 10. Qf3 axb5 11. a4 Kd8 (User) · 128.0M nodes · randomchampgamer-2026PC-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 | 1067 | 2 | |
| g1h3 | unsolved | 801 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| e2e4 | unsolved | 417 | 2 | |
| d2d4 | unsolved | 408 | 2 | |
| b1c3 | unsolved | 71 | 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 | Torom 26.6% of the fleet | 1.48T | 10,301 |
| 2 | BManBJ 25.1% of the fleet | 1.40T | 10,653 |
| 3 | auranvesdranor 21.4% of the fleet | 1.19T | 9,039 |
| 4 | tenzink 11.3% of the fleet | 628.06B | 3,865 |
| 5 | randomchampgamer 11.0% of the fleet | 609.83B | 4,893 |
| 6 | MoNiKaMaDnEsS 4.6% of the fleet | 256.38B | 1,645 |
6 accounts · 5.57T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 39.2% of the fleet | 79.65T | 677,611 |
| 2 | tenzink 16.6% of the fleet | 33.80T | 288,245 |
| 3 | auranvesdranor 10.7% of the fleet | 21.85T | 156,357 |
| 4 | BManBJ 10.5% of the fleet | 21.31T | 144,123 |
| 5 | JackIV 3.9% of the fleet | 7.94T | 56,572 |
| 6 | randomchampgamer 3.5% of the fleet | 7.06T | 50,411 |
| 7 | RickEdinson 3.1% of the fleet | 6.32T | 41,667 |
| 8 | NeoArcturus 2.0% of the fleet | 4.09T | 16,751 |
| 9 | MoNiKaMaDnEsS 1.8% of the fleet | 3.71T | 23,623 |
| 10 | ijh 1.8% of the fleet | 3.57T | 37,348 |
and 22 more.
32 accounts · 203.26T 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
- 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 19 proposals · see every proposal
Milestones
- Sep 18 10:46 Solved: WHITE_WIN via MINIMAXview
1. Na3 e5 2. Nf3 Qg5 … a6 10. Qf3 axb5 11. a4 Rg8
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 Ne7 6. e4 g6 7. Bb5 Nc6 8. d4 Bh6 9. Bg5 a6 10. Qf3 axb5 11. a4 Rg8 - Sep 18 10:46 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … Rf5 16. dxe5 Bd2 17. Qd7 Kf8
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 Ne7 6. e4 g6 7. Bb5 Nc6 8. d4 Bh6 9. Bg5 a6 10. Qf3 axb5 11. a4 Rg8 12. Kd1 Rc8 13. c4 Rf8 14. Qh3 f5 15. exf5 Rf5 16. dxe5 Bd2 17. Qd7 Kf8 - Sep 18 10:46 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … 15. exf5 Rf5 16. dxe5 Bd2 17. Qd7
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 Ne7 6. e4 g6 7. Bb5 Nc6 8. d4 Bh6 9. Bg5 a6 10. Qf3 axb5 11. a4 Rg8 12. Kd1 Rc8 13. c4 Rf8 14. Qh3 f5 15. exf5 Rf5 16. dxe5 Bd2 17. Qd7 - Sep 18 10:46 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … f5 15. exf5 Rf5 16. dxe5 Bd2
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 Ne7 6. e4 g6 7. Bb5 Nc6 8. d4 Bh6 9. Bg5 a6 10. Qf3 axb5 11. a4 Rg8 12. Kd1 Rc8 13. c4 Rf8 14. Qh3 f5 15. exf5 Rf5 16. dxe5 Bd2 - Sep 18 10:46 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … 14. Qh3 f5 15. exf5 Rf5 16. dxe5
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 Ne7 6. e4 g6 7. Bb5 Nc6 8. d4 Bh6 9. Bg5 a6 10. Qf3 axb5 11. a4 Rg8 12. Kd1 Rc8 13. c4 Rf8 14. Qh3 f5 15. exf5 Rf5 16. dxe5 - Sep 18 10:46 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … Rf8 14. Qh3 f5 15. exf5 Rf5
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 Ne7 6. e4 g6 7. Bb5 Nc6 8. d4 Bh6 9. Bg5 a6 10. Qf3 axb5 11. a4 Rg8 12. Kd1 Rc8 13. c4 Rf8 14. Qh3 f5 15. exf5 Rf5 - Sep 18 10:46 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … 13. c4 Rf8 14. Qh3 f5 15. exf5
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 Ne7 6. e4 g6 7. Bb5 Nc6 8. d4 Bh6 9. Bg5 a6 10. Qf3 axb5 11. a4 Rg8 12. Kd1 Rc8 13. c4 Rf8 14. Qh3 f5 15. exf5 - Sep 18 10:46 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … Rc8 13. c4 Rf8 14. Qh3 f5
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 Ne7 6. e4 g6 7. Bb5 Nc6 8. d4 Bh6 9. Bg5 a6 10. Qf3 axb5 11. a4 Rg8 12. Kd1 Rc8 13. c4 Rf8 14. Qh3 f5 - Sep 18 10:46 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … 12. Kd1 Rc8 13. c4 Rf8 14. Qh3
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 Ne7 6. e4 g6 7. Bb5 Nc6 8. d4 Bh6 9. Bg5 a6 10. Qf3 axb5 11. a4 Rg8 12. Kd1 Rc8 13. c4 Rf8 14. Qh3 - Sep 18 10:46 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … Rg8 12. Kd1 Rc8 13. c4 Rf8
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 Ne7 6. e4 g6 7. Bb5 Nc6 8. d4 Bh6 9. Bg5 a6 10. Qf3 axb5 11. a4 Rg8 12. Kd1 Rc8 13. c4 Rf8 - Sep 18 10:46 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … 11. a4 Rg8 12. Kd1 Rc8 13. c4
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 Ne7 6. e4 g6 7. Bb5 Nc6 8. d4 Bh6 9. Bg5 a6 10. Qf3 axb5 11. a4 Rg8 12. Kd1 Rc8 13. c4 - Sep 18 10:46 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … axb5 11. a4 Rg8 12. Kd1 Rc8
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 Ne7 6. e4 g6 7. Bb5 Nc6 8. d4 Bh6 9. Bg5 a6 10. Qf3 axb5 11. a4 Rg8 12. Kd1 Rc8