68.2M
positions
12.3M
practically solved
245.59T
engine nodes
1.9M
analyses
688
in queue
19
active workers
132
active cores
4.6M
nodes / sec
36.9
positions / min
57
proof number
3,808
disproof number
Root conquest: 0/20 first moves solved · 18.0% of tree positions solved · last 24h: 340,045 closures, 7.09T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 81 over 199 open obligations, of which 32 (16.1%) 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 1.9m (median of 73) · measured at 2026-09-30 03:00 UTC
Closures by source, last 24h (340009 of 340018 labelled): USER 99.9% (339784) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.1% (225) · last 7d (1999904 of 1999931): USER 97.8% (1956309) · FILL 0.4% (8795) · AUTO 1.6% (32065) · SOLVE 0.0% (0) · NONE 0.1% (2735). 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 … Na6 11. f3 d5 12. g3 Kf7 (User) · 128.0M nodes · auranvesdranor-admin-835912-atomicdb
- 1. Nh3 e6 2. e3 g6 … Na6 11. f3 d5 12. g3 Rb8 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 f6 2. Nc3 Nh6 … 6. Ng5 Nxg4 7. Bf4 d6 8. Qd2 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nh3 e6 2. e3 g6 … Na6 11. f3 d5 12. g3 Ke7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … 11. h3 Rc8 12. Nc3 a5 13. Bb5 (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 | 1038 | 2 | |
| g1h3 | unsolved | 812 | 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 39.1% of the fleet | 2.78T | 16,791 |
| 2 | BManBJ 20.3% of the fleet | 1.44T | 10,886 |
| 3 | auranvesdranor 14.4% of the fleet | 1.02T | 7,814 |
| 4 | randomchampgamer 8.2% of the fleet | 584.83B | 4,646 |
| 5 | tenzink 8.1% of the fleet | 575.54B | 4,086 |
| 6 | RickEdinson 5.4% of the fleet | 386.44B | 2,571 |
| 7 | MoNiKaMaDnEsS 4.4% of the fleet | 311.86B | 2,333 |
| 8 | soothdest <0.1% of the fleet | 1.31B | 21 |
8 accounts · 7.09T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 36.7% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.3% of the fleet | 37.63T | 313,474 |
| 3 | BManBJ 12.2% of the fleet | 29.92T | 207,723 |
| 4 | auranvesdranor 11.6% of the fleet | 28.57T | 206,465 |
| 5 | randomchampgamer 4.3% of the fleet | 10.49T | 77,204 |
| 6 | JackIV 4.1% of the fleet | 10.06T | 67,859 |
| 7 | RickEdinson 2.8% of the fleet | 6.96T | 46,163 |
| 8 | MoNiKaMaDnEsS 1.8% of the fleet | 4.45T | 28,929 |
| 9 | NeoArcturus 1.7% of the fleet | 4.09T | 16,758 |
| 10 | ijh 1.5% of the fleet | 3.57T | 37,348 |
and 25 more.
35 accounts · 245.73T 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 21 proposals · see every proposal
Milestones
- Sep 30 03:35 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … Kg7 12. Bb5 g5 13. Nc3 e5
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 Kf8 10. Bxh6 f4 11. h3 Kg7 12. Bb5 g5 13. Nc3 e5 - Sep 30 03:35 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Kf7 18. Qd7 Kf6 19. Qf7 Ke5
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 Kf8 10. Bxh6 f4 11. h3 Kg7 12. Bb5 g5 13. Nc3 e5 14. dxe5 d5 15. exd5 Rd8 16. Bd7 Re8 17. Bxe8 Kf7 18. Qd7 Kf6 19. Qf7 Ke5 - Sep 30 03:35 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 17. Bxe8 Kf7 18. Qd7 Kf6 19. Qf7
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 Kf8 10. Bxh6 f4 11. h3 Kg7 12. Bb5 g5 13. Nc3 e5 14. dxe5 d5 15. exd5 Rd8 16. Bd7 Re8 17. Bxe8 Kf7 18. Qd7 Kf6 19. Qf7 - Sep 30 03:35 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Re8 17. Bxe8 Kf7 18. Qd7 Kf6
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 Kf8 10. Bxh6 f4 11. h3 Kg7 12. Bb5 g5 13. Nc3 e5 14. dxe5 d5 15. exd5 Rd8 16. Bd7 Re8 17. Bxe8 Kf7 18. Qd7 Kf6 - Sep 30 03:35 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 16. Bd7 Re8 17. Bxe8 Kf7 18. Qd7
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 Kf8 10. Bxh6 f4 11. h3 Kg7 12. Bb5 g5 13. Nc3 e5 14. dxe5 d5 15. exd5 Rd8 16. Bd7 Re8 17. Bxe8 Kf7 18. Qd7 - Sep 30 03:35 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Rd8 16. Bd7 Re8 17. Bxe8 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 Kf8 10. Bxh6 f4 11. h3 Kg7 12. Bb5 g5 13. Nc3 e5 14. dxe5 d5 15. exd5 Rd8 16. Bd7 Re8 17. Bxe8 Kf7 - Sep 30 03:35 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 15. exd5 Rd8 16. Bd7 Re8 17. Bxe8
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 Kf8 10. Bxh6 f4 11. h3 Kg7 12. Bb5 g5 13. Nc3 e5 14. dxe5 d5 15. exd5 Rd8 16. Bd7 Re8 17. Bxe8 - Sep 30 03:35 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … d5 15. exd5 Rd8 16. Bd7 Re8
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 Kf8 10. Bxh6 f4 11. h3 Kg7 12. Bb5 g5 13. Nc3 e5 14. dxe5 d5 15. exd5 Rd8 16. Bd7 Re8 - Sep 30 03:35 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 14. dxe5 d5 15. exd5 Rd8 16. Bd7
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 Kf8 10. Bxh6 f4 11. h3 Kg7 12. Bb5 g5 13. Nc3 e5 14. dxe5 d5 15. exd5 Rd8 16. Bd7 - Sep 30 03:35 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … e5 14. dxe5 d5 15. exd5 Rd8
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 Kf8 10. Bxh6 f4 11. h3 Kg7 12. Bb5 g5 13. Nc3 e5 14. dxe5 d5 15. exd5 Rd8 - Sep 30 03:35 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 13. Nc3 e5 14. dxe5 d5 15. exd5
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 Kf8 10. Bxh6 f4 11. h3 Kg7 12. Bb5 g5 13. Nc3 e5 14. dxe5 d5 15. exd5 - Sep 30 03:35 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … g5 13. Nc3 e5 14. dxe5 d5
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 Kf8 10. Bxh6 f4 11. h3 Kg7 12. Bb5 g5 13. Nc3 e5 14. dxe5 d5