70.5M
positions
12.8M
practically solved
253.82T
engine nodes
2.0M
analyses
5,932
in queue
17
active workers
117
active cores
34.6M
nodes / sec
35.7
positions / min
82
proof number
3,797
disproof number
Root conquest: 0/20 first moves solved · 18.2% of tree positions solved · last 24h: 431,066 closures, 7.33T 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 1.3h (median of 118) · measured at 2026-10-01 06:00 UTC
Closures by source, last 24h (430922 of 430938 labelled): USER 99.9% (430637) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.1% (285) · last 7d (2496767 of 2496866): USER 98.2% (2452880) · FILL 0.4% (8795) · AUTO 1.3% (32065) · SOLVE 0.0% (0) · NONE 0.1% (3027). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nh3 h6 2. Nc3 e6 … 9. b3 O-O 10. Ba3 Rfc8 11. Qxg4 (User) · 128.0M nodes · auranvesdranor-admin-835912-atomicdb
- 1. Nh3 h6 2. Nc3 e6 … 9. b3 O-O 10. Ba3 Rfc8 11. Qd3 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nh3 h6 2. d4 d5 … Rg8 21. cxd5 Ng4 22. Bh6 Bxh6 (User) · 128.0M nodes · cloudlet
- 1. Nh3 h6 2. d4 d5 … 18. a5 g4 19. h4 gxf3 20. c4 (User) · 128.0M nodes · collateral
- 1. Nh3 h6 2. d4 d5 … 21. cxd5 Ng4 22. Bh6 Bxh6 23. Rfc1 (User) · 128.0M nodes · manikin
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 43.0% of the fleet | 3.15T | 24,184 |
| 2 | BManBJ 19.9% of the fleet | 1.46T | 11,360 |
| 3 | auranvesdranor 14.2% of the fleet | 1.04T | 7,896 |
| 4 | randomchampgamer 8.4% of the fleet | 612.98B | 4,921 |
| 5 | tenzink 8.1% of the fleet | 593.00B | 4,188 |
| 6 | RickEdinson 3.5% of the fleet | 257.84B | 1,780 |
| 7 | MoNiKaMaDnEsS 2.9% of the fleet | 209.62B | 1,669 |
| 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 | 38.31T | 318,351 |
| 3 | BManBJ 12.4% of the fleet | 31.57T | 220,582 |
| 4 | auranvesdranor 11.7% of the fleet | 29.75T | 215,397 |
| 5 | randomchampgamer 4.4% of the fleet | 11.17T | 82,754 |
| 6 | JackIV 4.0% of the fleet | 10.06T | 67,859 |
| 7 | RickEdinson 2.8% of the fleet | 7.22T | 47,975 |
| 8 | gannet 2.8% of the fleet | 7.03T | 45,248 |
| 9 | MoNiKaMaDnEsS 1.9% of the fleet | 4.71T | 30,962 |
| 10 | NeoArcturus 1.6% of the fleet | 4.09T | 16,758 |
and 25 more.
35 accounts · 253.99T 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 06:45 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nc3 g6 … Ra7 12. e4 Bc5 13. O-O f5
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kd8 9. d4 Bb4 10. c3 a5 11. h3 Ra7 12. e4 Bc5 13. O-O f5 - Oct 01 06:45 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nc3 g6 … Kc8 12. e4 a4 13. Qg4 Bd6
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kd8 9. d4 a5 10. h3 Ra6 11. O-O Kc8 12. e4 a4 13. Qg4 Bd6 - Oct 01 06:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … Rc5 22. exd5 Kb8 23. Qc7 Ka8
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kd8 9. d4 Bb4 10. c3 a5 11. h3 a4 12. e4 Ra6 13. Qe2 Kc8 14. O-O a3 15. Bd7 Kd8 16. cxb4 Rb6 17. Bd2 e5 18. Bb4 Rb5 19. Be7 Kc7 20. Rac1 axb2 21. Qc2 Rc5 22. exd5 Kb8 23. Qc7 Ka8 - Oct 01 06:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 21. Qc2 Rc5 22. exd5 Kb8 23. Qc7
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kd8 9. d4 Bb4 10. c3 a5 11. h3 a4 12. e4 Ra6 13. Qe2 Kc8 14. O-O a3 15. Bd7 Kd8 16. cxb4 Rb6 17. Bd2 e5 18. Bb4 Rb5 19. Be7 Kc7 20. Rac1 axb2 21. Qc2 Rc5 22. exd5 Kb8 23. Qc7 - Oct 01 06:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … axb2 21. Qc2 Rc5 22. exd5 Kb8
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kd8 9. d4 Bb4 10. c3 a5 11. h3 a4 12. e4 Ra6 13. Qe2 Kc8 14. O-O a3 15. Bd7 Kd8 16. cxb4 Rb6 17. Bd2 e5 18. Bb4 Rb5 19. Be7 Kc7 20. Rac1 axb2 21. Qc2 Rc5 22. exd5 Kb8 - Oct 01 06:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 20. Rac1 axb2 21. Qc2 Rc5 22. exd5
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kd8 9. d4 Bb4 10. c3 a5 11. h3 a4 12. e4 Ra6 13. Qe2 Kc8 14. O-O a3 15. Bd7 Kd8 16. cxb4 Rb6 17. Bd2 e5 18. Bb4 Rb5 19. Be7 Kc7 20. Rac1 axb2 21. Qc2 Rc5 22. exd5 - Oct 01 06:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … Kc7 20. Rac1 axb2 21. Qc2 Rc5
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kd8 9. d4 Bb4 10. c3 a5 11. h3 a4 12. e4 Ra6 13. Qe2 Kc8 14. O-O a3 15. Bd7 Kd8 16. cxb4 Rb6 17. Bd2 e5 18. Bb4 Rb5 19. Be7 Kc7 20. Rac1 axb2 21. Qc2 Rc5 - Oct 01 06:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 19. Be7 Kc7 20. Rac1 axb2 21. Qc2
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kd8 9. d4 Bb4 10. c3 a5 11. h3 a4 12. e4 Ra6 13. Qe2 Kc8 14. O-O a3 15. Bd7 Kd8 16. cxb4 Rb6 17. Bd2 e5 18. Bb4 Rb5 19. Be7 Kc7 20. Rac1 axb2 21. Qc2 - Oct 01 06:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … Rb5 19. Be7 Kc7 20. Rac1 axb2
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kd8 9. d4 Bb4 10. c3 a5 11. h3 a4 12. e4 Ra6 13. Qe2 Kc8 14. O-O a3 15. Bd7 Kd8 16. cxb4 Rb6 17. Bd2 e5 18. Bb4 Rb5 19. Be7 Kc7 20. Rac1 axb2 - Oct 01 06:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 18. Bb4 Rb5 19. Be7 Kc7 20. Rac1
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kd8 9. d4 Bb4 10. c3 a5 11. h3 a4 12. e4 Ra6 13. Qe2 Kc8 14. O-O a3 15. Bd7 Kd8 16. cxb4 Rb6 17. Bd2 e5 18. Bb4 Rb5 19. Be7 Kc7 20. Rac1 - Oct 01 06:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … e5 18. Bb4 Rb5 19. Be7 Kc7
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kd8 9. d4 Bb4 10. c3 a5 11. h3 a4 12. e4 Ra6 13. Qe2 Kc8 14. O-O a3 15. Bd7 Kd8 16. cxb4 Rb6 17. Bd2 e5 18. Bb4 Rb5 19. Be7 Kc7 - Oct 01 06:45 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 17. Bd2 e5 18. Bb4 Rb5 19. Be7
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kd8 9. d4 Bb4 10. c3 a5 11. h3 a4 12. e4 Ra6 13. Qe2 Kc8 14. O-O a3 15. Bd7 Kd8 16. cxb4 Rb6 17. Bd2 e5 18. Bb4 Rb5 19. Be7