65.4M
positions
11.7M
practically solved
234.78T
engine nodes
1.8M
analyses
7,517
in queue
12
active workers
80
active cores
22.3M
nodes / sec
23.1
positions / min
125
proof number
3,777
disproof number
Root conquest: 0/20 first moves solved · 17.8% of tree positions solved · last 24h: 195,485 closures, 3.62T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 82 over 196 open obligations, of which 30 (15.3%) 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 2.8m (median of 145) · measured at 2026-09-28 09:00 UTC
Closures by source, last 24h (195490 of 195490 labelled): USER 99.9% (195377) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.1% (113) · last 7d (1416730 of 1416730): USER 97.0% (1374098) · FILL 0.6% (8795) · AUTO 2.3% (32065) · SOLVE 0.0% (0) · NONE 0.1% (1772). 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 … 8. Bb5 O-O 9. h3 a5 10. Rh2 (User) · 128.0M nodes · auranvesdranor-admin-835912-atomicdb
- 1. Nh3 f5 2. e3 e6 … 8. Bb5 O-O 9. h3 a5 10. Rg1 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … c5 12. g3 h4 13. h3 f4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … c5 12. g3 h4 13. h3 d5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … c5 12. g3 h4 13. h3 hxg3 (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 | 1057 | 2 | |
| g1h3 | unsolved | 820 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 435 | 2 | |
| e2e4 | unsolved | 417 | 2 | |
| b1c3 | unsolved | 183 | 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 | 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 38.5% of the fleet | 1.39T | 10,549 |
| 2 | auranvesdranor 24.9% of the fleet | 902.16B | 6,767 |
| 3 | randomchampgamer 15.3% of the fleet | 552.42B | 4,359 |
| 4 | tenzink 14.2% of the fleet | 514.08B | 3,308 |
| 5 | uipio 4.4% of the fleet | 159.43B | 879 |
| 6 | bricerichmond 2.2% of the fleet | 78.17B | 113 |
| 7 | soothdest 0.5% of the fleet | 17.08B | 132 |
| 8 | rhaxier <0.1% of the fleet | 1.66B | 13 |
8 accounts · 3.62T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 38.5% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.6% of the fleet | 36.62T | 306,738 |
| 3 | BManBJ 11.7% of the fleet | 27.38T | 188,721 |
| 4 | auranvesdranor 11.4% of the fleet | 26.75T | 192,514 |
| 5 | JackIV 4.3% of the fleet | 10.06T | 67,859 |
| 6 | randomchampgamer 4.0% of the fleet | 9.43T | 68,671 |
| 7 | RickEdinson 2.8% of the fleet | 6.50T | 43,070 |
| 8 | MoNiKaMaDnEsS 1.8% of the fleet | 4.14T | 26,565 |
| 9 | NeoArcturus 1.7% of the fleet | 4.09T | 16,756 |
| 10 | ijh 1.5% of the fleet | 3.57T | 37,348 |
and 24 more.
34 accounts · 234.79T 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 09:09 Solved: WHITE_WIN via MINIMAXview
1. Nh3 f6 2. Nc3 c6 … g6 6. Qb5 Nc6 7. Qb6 Nd4
1. Nh3 f6 2. Nc3 c6 3. Nd5 cxd5 4. e4 e6 5. Qh5 g6 6. Qb5 Nc6 7. Qb6 Nd4 - Sep 28 09:09 Solved: WHITE_WIN via MINIMAXview
1. Nh3 f6 2. Nc3 c6 … g6 6. Qb5 Nc6 7. Qb6 Nb4
1. Nh3 f6 2. Nc3 c6 3. Nd5 cxd5 4. e4 e6 5. Qh5 g6 6. Qb5 Nc6 7. Qb6 Nb4 - Sep 28 09:09 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … c5 12. g3 h4 13. h3 exd4
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. Bb5 Qxb5 6. d4 g6 7. Nxh8 b6 8. Bg5 e5 9. b4 a5 10. a4 Nd7 11. c4 c5 12. g3 h4 13. h3 exd4 - Sep 28 09:09 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Kf7 18. Qd8 Bb7 19. Qd7 Kg8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. Bb5 Qxb5 6. d4 g6 7. Nxh8 b6 8. Bg5 e5 9. b4 a5 10. a4 Nd7 11. c4 c5 12. g3 h4 13. h3 exd4 14. Be7 Bh6 15. f4 Bg7 16. Bxd6 Bd4 17. bxc5 Kf7 18. Qd8 Bb7 19. Qd7 Kg8 - Sep 28 09:09 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 17. bxc5 Kf7 18. Qd8 Bb7 19. Qd7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. Bb5 Qxb5 6. d4 g6 7. Nxh8 b6 8. Bg5 e5 9. b4 a5 10. a4 Nd7 11. c4 c5 12. g3 h4 13. h3 exd4 14. Be7 Bh6 15. f4 Bg7 16. Bxd6 Bd4 17. bxc5 Kf7 18. Qd8 Bb7 19. Qd7 - Sep 28 09:09 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Bd4 17. bxc5 Kf7 18. Qd8 Bb7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. Bb5 Qxb5 6. d4 g6 7. Nxh8 b6 8. Bg5 e5 9. b4 a5 10. a4 Nd7 11. c4 c5 12. g3 h4 13. h3 exd4 14. Be7 Bh6 15. f4 Bg7 16. Bxd6 Bd4 17. bxc5 Kf7 18. Qd8 Bb7 - Sep 28 09:09 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 16. Bxd6 Bd4 17. bxc5 Kf7 18. Qd8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. Bb5 Qxb5 6. d4 g6 7. Nxh8 b6 8. Bg5 e5 9. b4 a5 10. a4 Nd7 11. c4 c5 12. g3 h4 13. h3 exd4 14. Be7 Bh6 15. f4 Bg7 16. Bxd6 Bd4 17. bxc5 Kf7 18. Qd8 - Sep 28 09:09 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Bg7 16. Bxd6 Bd4 17. bxc5 Kf7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. Bb5 Qxb5 6. d4 g6 7. Nxh8 b6 8. Bg5 e5 9. b4 a5 10. a4 Nd7 11. c4 c5 12. g3 h4 13. h3 exd4 14. Be7 Bh6 15. f4 Bg7 16. Bxd6 Bd4 17. bxc5 Kf7 - Sep 28 09:09 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 15. f4 Bg7 16. Bxd6 Bd4 17. bxc5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. Bb5 Qxb5 6. d4 g6 7. Nxh8 b6 8. Bg5 e5 9. b4 a5 10. a4 Nd7 11. c4 c5 12. g3 h4 13. h3 exd4 14. Be7 Bh6 15. f4 Bg7 16. Bxd6 Bd4 17. bxc5 - Sep 28 09:09 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Bh6 15. f4 Bg7 16. Bxd6 Bd4
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. Bb5 Qxb5 6. d4 g6 7. Nxh8 b6 8. Bg5 e5 9. b4 a5 10. a4 Nd7 11. c4 c5 12. g3 h4 13. h3 exd4 14. Be7 Bh6 15. f4 Bg7 16. Bxd6 Bd4 - Sep 28 09:09 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 14. Be7 Bh6 15. f4 Bg7 16. Bxd6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. Bb5 Qxb5 6. d4 g6 7. Nxh8 b6 8. Bg5 e5 9. b4 a5 10. a4 Nd7 11. c4 c5 12. g3 h4 13. h3 exd4 14. Be7 Bh6 15. f4 Bg7 16. Bxd6 - Sep 28 09:09 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … exd4 14. Be7 Bh6 15. f4 Bg7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. Bb5 Qxb5 6. d4 g6 7. Nxh8 b6 8. Bg5 e5 9. b4 a5 10. a4 Nd7 11. c4 c5 12. g3 h4 13. h3 exd4 14. Be7 Bh6 15. f4 Bg7