66.1M
positions
11.9M
practically solved
237.65T
engine nodes
1.8M
analyses
6,014
in queue
15
active workers
104
active cores
22.6M
nodes / sec
27.1
positions / min
83
proof number
3,835
disproof number
Root conquest: 0/20 first moves solved · 17.9% of tree positions solved · last 24h: 255,390 closures, 4.57T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 81 over 196 open obligations, of which 32 (16.3%) 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 25.1m (median of 64) · measured at 2026-09-28 23:00 UTC
Closures by source, last 24h (255344 of 255344 labelled): USER 99.8% (254716) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.2% (628) · last 7d (1580539 of 1580585): USER 97.3% (1537315) · FILL 0.6% (8795) · AUTO 2.0% (32065) · SOLVE 0.0% (0) · NONE 0.1% (2364). 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 … Ra7 16. Bd2 Qf4 17. e5 Nxd4 (User) · 128.0M nodes · auranvesdranor-admin-835912-atomicdb
- 1. Nh3 e6 2. e3 g6 … Ra7 16. Bd2 Qf4 17. e5 Nf6 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Na6 11. b4 c5 12. Nxh8 Nxb4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Na6 11. b4 c5 12. Nxh8 fxe4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … Na6 11. b4 c5 12. Nxh8 cxd4 (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 | 1100 | 2 | |
| g1h3 | unsolved | 786 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 436 | 2 | |
| e2e4 | unsolved | 417 | 2 | |
| b1c3 | unsolved | 142 | 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 | 3 | |
| d2d3 | unsolved | -116 | 2 | |
| b2b3 | unsolved | -119 | 1 | |
| f2f4 | unsolved | -301 | 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 | BManBJ 31.2% of the fleet | 1.42T | 10,603 |
| 2 | auranvesdranor 23.1% of the fleet | 1.06T | 8,128 |
| 3 | randomchampgamer 12.8% of the fleet | 583.15B | 4,730 |
| 4 | tenzink 12.3% of the fleet | 562.63B | 3,360 |
| 5 | gannet 10.7% of the fleet | 490.36B | 912 |
| 6 | uipio 6.9% of the fleet | 317.54B | 1,518 |
| 7 | bricerichmond 1.7% of the fleet | 77.47B | 107 |
| 8 | rhaxier 0.9% of the fleet | 41.89B | 253 |
| 9 | soothdest 0.3% of the fleet | 12.60B | 95 |
| 10 | RickEdinson 0.1% of the fleet | 3.59B | 29 |
and 1 more.
11 accounts · 4.57T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 38.0% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.6% of the fleet | 36.98T | 308,858 |
| 3 | BManBJ 11.9% of the fleet | 28.23T | 194,953 |
| 4 | auranvesdranor 11.5% of the fleet | 27.37T | 197,285 |
| 5 | JackIV 4.2% of the fleet | 10.06T | 67,859 |
| 6 | randomchampgamer 4.1% of the fleet | 9.80T | 71,720 |
| 7 | RickEdinson 2.7% of the fleet | 6.50T | 43,099 |
| 8 | MoNiKaMaDnEsS 1.7% of the fleet | 4.14T | 26,565 |
| 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 · 237.70T 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 28 23:25 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nc3 d6 … e5 12. d4 Bh4 13. g3 Be7
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 f5 7. e3 Be7 8. Bb5 Kf8 9. Bd7 Bd8 10. b3 Kg8 11. Bb2 e5 12. d4 Bh4 13. g3 Be7 - Sep 28 23:25 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … g6 18. Qd4 Ke8 19. Qg7 Kd8
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 f5 7. e3 Be7 8. Bb5 Kf8 9. Bd7 Bd8 10. b3 Kg8 11. Bb2 e5 12. d4 Bh4 13. g3 Be7 14. Bc3 e4 15. d5 Bf6 16. Be6 Kf8 17. Bxf5 g6 18. Qd4 Ke8 19. Qg7 Kd8 - Sep 28 23:25 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 17. Bxf5 g6 18. Qd4 Ke8 19. Qg7
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 f5 7. e3 Be7 8. Bb5 Kf8 9. Bd7 Bd8 10. b3 Kg8 11. Bb2 e5 12. d4 Bh4 13. g3 Be7 14. Bc3 e4 15. d5 Bf6 16. Be6 Kf8 17. Bxf5 g6 18. Qd4 Ke8 19. Qg7 - Sep 28 23:25 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … Kf8 17. Bxf5 g6 18. Qd4 Ke8
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 f5 7. e3 Be7 8. Bb5 Kf8 9. Bd7 Bd8 10. b3 Kg8 11. Bb2 e5 12. d4 Bh4 13. g3 Be7 14. Bc3 e4 15. d5 Bf6 16. Be6 Kf8 17. Bxf5 g6 18. Qd4 Ke8 - Sep 28 23:25 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 16. Be6 Kf8 17. Bxf5 g6 18. Qd4
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 f5 7. e3 Be7 8. Bb5 Kf8 9. Bd7 Bd8 10. b3 Kg8 11. Bb2 e5 12. d4 Bh4 13. g3 Be7 14. Bc3 e4 15. d5 Bf6 16. Be6 Kf8 17. Bxf5 g6 18. Qd4 - Sep 28 23:25 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … Bf6 16. Be6 Kf8 17. Bxf5 g6
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 f5 7. e3 Be7 8. Bb5 Kf8 9. Bd7 Bd8 10. b3 Kg8 11. Bb2 e5 12. d4 Bh4 13. g3 Be7 14. Bc3 e4 15. d5 Bf6 16. Be6 Kf8 17. Bxf5 g6 - Sep 28 23:25 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 15. d5 Bf6 16. Be6 Kf8 17. Bxf5
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 f5 7. e3 Be7 8. Bb5 Kf8 9. Bd7 Bd8 10. b3 Kg8 11. Bb2 e5 12. d4 Bh4 13. g3 Be7 14. Bc3 e4 15. d5 Bf6 16. Be6 Kf8 17. Bxf5 - Sep 28 23:25 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … e4 15. d5 Bf6 16. Be6 Kf8
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 f5 7. e3 Be7 8. Bb5 Kf8 9. Bd7 Bd8 10. b3 Kg8 11. Bb2 e5 12. d4 Bh4 13. g3 Be7 14. Bc3 e4 15. d5 Bf6 16. Be6 Kf8 - Sep 28 23:25 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 14. Bc3 e4 15. d5 Bf6 16. Be6
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 f5 7. e3 Be7 8. Bb5 Kf8 9. Bd7 Bd8 10. b3 Kg8 11. Bb2 e5 12. d4 Bh4 13. g3 Be7 14. Bc3 e4 15. d5 Bf6 16. Be6 - Sep 28 23:25 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … Be7 14. Bc3 e4 15. d5 Bf6
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 f5 7. e3 Be7 8. Bb5 Kf8 9. Bd7 Bd8 10. b3 Kg8 11. Bb2 e5 12. d4 Bh4 13. g3 Be7 14. Bc3 e4 15. d5 Bf6 - Sep 28 23:25 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 13. g3 Be7 14. Bc3 e4 15. d5
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 f5 7. e3 Be7 8. Bb5 Kf8 9. Bd7 Bd8 10. b3 Kg8 11. Bb2 e5 12. d4 Bh4 13. g3 Be7 14. Bc3 e4 15. d5 - Sep 28 23:25 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … Bh4 13. g3 Be7 14. Bc3 e4
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 f5 7. e3 Be7 8. Bb5 Kf8 9. Bd7 Bd8 10. b3 Kg8 11. Bb2 e5 12. d4 Bh4 13. g3 Be7 14. Bc3 e4