64.8M
positions
11.5M
practically solved
232.49T
engine nodes
1.8M
analyses
7,056
in queue
10
active workers
64
active cores
8.0M
nodes / sec
17.4
positions / min
125
proof number
3,777
disproof number
Root conquest: 0/20 first moves solved · 17.8% of tree positions solved · last 24h: 336,239 closures, 3.95T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 81 over 191 open obligations, of which 30 (15.7%) 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 5.5h (median of 118) · measured at 2026-09-27 19:00 UTC
Closures by source, last 24h (336212 of 336212 labelled): USER 97.7% (328443) · FILL 0.4% (1250) · AUTO 1.8% (6050) · SOLVE 0.0% (0) · NONE 0.1% (469) · last 7d (1293018 of 1293045): USER 96.7% (1250422) · FILL 0.7% (8795) · AUTO 2.5% (32065) · SOLVE 0.0% (0) · NONE 0.1% (1736). 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 … 12. g3 Bd6 13. f3 Be7 14. a4 (User) · 128.0M nodes · auranvesdranor-admin-835912-atomicdb
- 1. Nh3 f5 2. e3 e6 … 12. g3 Bd6 13. f3 Be7 14. c4 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Bb7 11. O-O Nd7 12. f3 Bxe4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Bb7 11. O-O Nd7 12. f3 Bd5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … Bb7 11. O-O Nd7 12. f3 Ba6 (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 | 967 | 2 | |
| g1h3 | unsolved | 787 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 435 | 2 | |
| e2e4 | unsolved | 417 | 2 | |
| b1c3 | unsolved | 183 | 2 | |
| c2c3 | unsolved | 19 | 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 | -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 27.6% of the fleet | 1.09T | 7,298 |
| 2 | auranvesdranor 21.7% of the fleet | 858.00B | 5,218 |
| 3 | NitroColoraze 19.5% of the fleet | 770.05B | 3,805 |
| 4 | tenzink 14.2% of the fleet | 561.13B | 3,425 |
| 5 | randomchampgamer 13.9% of the fleet | 549.21B | 4,041 |
| 6 | MoNiKaMaDnEsS 2.5% of the fleet | 98.75B | 664 |
| 7 | soothdest 0.4% of the fleet | 15.98B | 122 |
| 8 | RandomMatrix 0.2% of the fleet | 7.55B | 56 |
| 9 | rhaxier <0.1% of the fleet | 1.66B | 13 |
| 10 | bricerichmond <0.1% of the fleet | 700.3M | 6 |
10 accounts · 3.95T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 38.8% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.6% of the fleet | 36.33T | 304,969 |
| 3 | BManBJ 11.4% of the fleet | 26.59T | 182,600 |
| 4 | auranvesdranor 11.2% of the fleet | 26.15T | 187,896 |
| 5 | JackIV 4.3% of the fleet | 10.06T | 67,859 |
| 6 | randomchampgamer 3.9% of the fleet | 9.12T | 66,268 |
| 7 | RickEdinson 2.8% of the fleet | 6.50T | 43,070 |
| 8 | MoNiKaMaDnEsS 1.8% of the fleet | 4.14T | 26,565 |
| 9 | NeoArcturus 1.8% of the fleet | 4.09T | 16,756 |
| 10 | ijh 1.5% of the fleet | 3.57T | 37,348 |
and 23 more.
33 accounts · 232.57T 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 27 19:40 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nc3 d6 … Rb8 11. Qc2 Ba5 12. b4 Kg8
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Be7 7. e3 h5 8. Bb5 Kf8 9. c4 Bd8 10. O-O Rb8 11. Qc2 Ba5 12. b4 Kg8 - Sep 27 19:40 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … e5 17. Qd5 Kh7 18. Qf7 Kh6
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Be7 7. e3 h5 8. Bb5 Kf8 9. c4 Bd8 10. O-O Rb8 11. Qc2 Ba5 12. b4 Kg8 13. Qe4 g6 14. Qf4 g5 15. Qe4 f5 16. Qd4 e5 17. Qd5 Kh7 18. Qf7 Kh6 - Sep 27 19:40 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 16. Qd4 e5 17. Qd5 Kh7 18. Qf7
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Be7 7. e3 h5 8. Bb5 Kf8 9. c4 Bd8 10. O-O Rb8 11. Qc2 Ba5 12. b4 Kg8 13. Qe4 g6 14. Qf4 g5 15. Qe4 f5 16. Qd4 e5 17. Qd5 Kh7 18. Qf7 - Sep 27 19:40 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … f5 16. Qd4 e5 17. Qd5 Kh7
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Be7 7. e3 h5 8. Bb5 Kf8 9. c4 Bd8 10. O-O Rb8 11. Qc2 Ba5 12. b4 Kg8 13. Qe4 g6 14. Qf4 g5 15. Qe4 f5 16. Qd4 e5 17. Qd5 Kh7 - Sep 27 19:40 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 15. Qe4 f5 16. Qd4 e5 17. Qd5
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Be7 7. e3 h5 8. Bb5 Kf8 9. c4 Bd8 10. O-O Rb8 11. Qc2 Ba5 12. b4 Kg8 13. Qe4 g6 14. Qf4 g5 15. Qe4 f5 16. Qd4 e5 17. Qd5 - Sep 27 19:40 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … g5 15. Qe4 f5 16. Qd4 e5
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Be7 7. e3 h5 8. Bb5 Kf8 9. c4 Bd8 10. O-O Rb8 11. Qc2 Ba5 12. b4 Kg8 13. Qe4 g6 14. Qf4 g5 15. Qe4 f5 16. Qd4 e5 - Sep 27 19:40 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 14. Qf4 g5 15. Qe4 f5 16. Qd4
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Be7 7. e3 h5 8. Bb5 Kf8 9. c4 Bd8 10. O-O Rb8 11. Qc2 Ba5 12. b4 Kg8 13. Qe4 g6 14. Qf4 g5 15. Qe4 f5 16. Qd4 - Sep 27 19:40 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … g6 14. Qf4 g5 15. Qe4 f5
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Be7 7. e3 h5 8. Bb5 Kf8 9. c4 Bd8 10. O-O Rb8 11. Qc2 Ba5 12. b4 Kg8 13. Qe4 g6 14. Qf4 g5 15. Qe4 f5 - Sep 27 19:40 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 13. Qe4 g6 14. Qf4 g5 15. Qe4
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Be7 7. e3 h5 8. Bb5 Kf8 9. c4 Bd8 10. O-O Rb8 11. Qc2 Ba5 12. b4 Kg8 13. Qe4 g6 14. Qf4 g5 15. Qe4 - Sep 27 19:40 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … Kg8 13. Qe4 g6 14. Qf4 g5
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Be7 7. e3 h5 8. Bb5 Kf8 9. c4 Bd8 10. O-O Rb8 11. Qc2 Ba5 12. b4 Kg8 13. Qe4 g6 14. Qf4 g5 - Sep 27 19:40 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 12. b4 Kg8 13. Qe4 g6 14. Qf4
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Be7 7. e3 h5 8. Bb5 Kf8 9. c4 Bd8 10. O-O Rb8 11. Qc2 Ba5 12. b4 Kg8 13. Qe4 g6 14. Qf4 - Sep 27 19:40 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … Ba5 12. b4 Kg8 13. Qe4 g6
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Be7 7. e3 h5 8. Bb5 Kf8 9. c4 Bd8 10. O-O Rb8 11. Qc2 Ba5 12. b4 Kg8 13. Qe4 g6