70.4M
positions
12.8M
practically solved
253.48T
engine nodes
2.0M
analyses
6,805
in queue
21
active workers
137
active cores
20.2M
nodes / sec
43.9
positions / min
82
proof number
3,797
disproof number
Root conquest: 0/20 first moves solved · 18.2% of tree positions solved · last 24h: 425,956 closures, 7.32T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 81 over 195 open obligations, of which 30 (15.4%) 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 18.0m (median of 136) · measured at 2026-10-01 05:00 UTC
Closures by source, last 24h (425662 of 425685 labelled): USER 99.9% (425430) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.1% (232) · last 7d (2471827 of 2471966): USER 98.2% (2427992) · FILL 0.4% (8795) · AUTO 1.3% (32065) · SOLVE 0.0% (0) · NONE 0.1% (2975). 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 … 18. axb4 a4 19. Ne6 Kg8 20. Ng1 (User) · 128.0M nodes · auranvesdranor-admin-835912-atomicdb
- 1. Nh3 e6 2. e3 g6 … 18. axb4 a4 19. Ne6 Kg8 20. exd5 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Kg8 13. Bd7 b6 14. Bc8 e6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Kg8 13. Bd7 b6 14. Bc8 h4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … Kg8 13. Bd7 b6 14. Bc8 g5 (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 | 1015 | 2 | |
| g1h3 | unsolved | 706 | 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 42.9% of the fleet | 3.14T | 24,147 |
| 2 | BManBJ 20.6% of the fleet | 1.51T | 11,721 |
| 3 | auranvesdranor 14.3% of the fleet | 1.04T | 7,893 |
| 4 | randomchampgamer 8.3% of the fleet | 610.85B | 4,899 |
| 5 | tenzink 8.1% of the fleet | 591.72B | 4,177 |
| 6 | RickEdinson 3.2% of the fleet | 235.16B | 1,601 |
| 7 | MoNiKaMaDnEsS 2.6% of the fleet | 191.31B | 1,518 |
| 8 | soothdest <0.1% of the fleet | 1.47B | 35 |
8 accounts · 7.33T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 35.6% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.1% of the fleet | 38.28T | 318,096 |
| 3 | BManBJ 12.4% of the fleet | 31.55T | 220,385 |
| 4 | auranvesdranor 11.7% of the fleet | 29.70T | 215,000 |
| 5 | randomchampgamer 4.4% of the fleet | 11.14T | 82,508 |
| 6 | JackIV 4.0% of the fleet | 10.06T | 67,859 |
| 7 | RickEdinson 2.8% of the fleet | 7.20T | 47,796 |
| 8 | gannet 2.7% of the fleet | 6.88T | 44,115 |
| 9 | MoNiKaMaDnEsS 1.8% of the fleet | 4.68T | 30,693 |
| 10 | NeoArcturus 1.6% of the fleet | 4.09T | 16,758 |
and 25 more.
35 accounts · 253.65T 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 01 05:37 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … Kg8 13. Bd7 b6 14. Bc8 Ng4
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 d5 11. Bb5 f4 12. h3 Kg8 13. Bd7 b6 14. Bc8 Ng4 - Oct 01 05:37 Solved: BLACK_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 14. Bc8 Ng4 15. Kd2 Ne3 16. Qf3
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 d5 11. Bb5 f4 12. h3 Kg8 13. Bd7 b6 14. Bc8 Ng4 15. Kd2 Ne3 16. Qf3 - Oct 01 05:37 Solved: BLACK_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … b6 14. Bc8 Ng4 15. Kd2 Ne3
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 d5 11. Bb5 f4 12. h3 Kg8 13. Bd7 b6 14. Bc8 Ng4 15. Kd2 Ne3 - Oct 01 05:37 Solved: BLACK_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 13. Bd7 b6 14. Bc8 Ng4 15. Kd2
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 d5 11. Bb5 f4 12. h3 Kg8 13. Bd7 b6 14. Bc8 Ng4 15. Kd2 - Oct 01 05:37 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Re7 19. Bxe6 h4 20. Qf8 Kh7
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 d5 11. Bb5 f4 12. h3 Kg8 13. Bd7 b6 14. Bc8 Ng4 15. hxg4 e6 16. Qd2 a5 17. Qc3 Ra7 18. Qa3 Re7 19. Bxe6 h4 20. Qf8 Kh7 - Oct 01 05:37 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 18. Qa3 Re7 19. Bxe6 h4 20. Qf8
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 d5 11. Bb5 f4 12. h3 Kg8 13. Bd7 b6 14. Bc8 Ng4 15. hxg4 e6 16. Qd2 a5 17. Qc3 Ra7 18. Qa3 Re7 19. Bxe6 h4 20. Qf8 - Oct 01 05:37 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Ra7 18. Qa3 Re7 19. Bxe6 h4
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 d5 11. Bb5 f4 12. h3 Kg8 13. Bd7 b6 14. Bc8 Ng4 15. hxg4 e6 16. Qd2 a5 17. Qc3 Ra7 18. Qa3 Re7 19. Bxe6 h4 - Oct 01 05:37 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 17. Qc3 Ra7 18. Qa3 Re7 19. Bxe6
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 d5 11. Bb5 f4 12. h3 Kg8 13. Bd7 b6 14. Bc8 Ng4 15. hxg4 e6 16. Qd2 a5 17. Qc3 Ra7 18. Qa3 Re7 19. Bxe6 - Oct 01 05:37 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … a5 17. Qc3 Ra7 18. Qa3 Re7
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 d5 11. Bb5 f4 12. h3 Kg8 13. Bd7 b6 14. Bc8 Ng4 15. hxg4 e6 16. Qd2 a5 17. Qc3 Ra7 18. Qa3 Re7 - Oct 01 05:37 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 16. Qd2 a5 17. Qc3 Ra7 18. Qa3
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 d5 11. Bb5 f4 12. h3 Kg8 13. Bd7 b6 14. Bc8 Ng4 15. hxg4 e6 16. Qd2 a5 17. Qc3 Ra7 18. Qa3 - Oct 01 05:37 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … e6 16. Qd2 a5 17. Qc3 Ra7
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 d5 11. Bb5 f4 12. h3 Kg8 13. Bd7 b6 14. Bc8 Ng4 15. hxg4 e6 16. Qd2 a5 17. Qc3 Ra7 - Oct 01 05:37 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 15. hxg4 e6 16. Qd2 a5 17. Qc3
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 d5 11. Bb5 f4 12. h3 Kg8 13. Bd7 b6 14. Bc8 Ng4 15. hxg4 e6 16. Qd2 a5 17. Qc3