65.6M
positions
11.7M
practically solved
235.77T
engine nodes
1.8M
analyses
7,206
in queue
12
active workers
80
active cores
40.8M
nodes / sec
16.0
positions / min
101
proof number
3,777
disproof number
Root conquest: 0/20 first moves solved · 17.8% of tree positions solved · last 24h: 197,047 closures, 3.99T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 81 over 197 open obligations, of which 31 (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 28.4m (median of 167) · measured at 2026-09-28 14:00 UTC
Closures by source, last 24h (197047 of 197047 labelled): USER 99.9% (196784) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.1% (263) · last 7d (1451689 of 1451689): USER 97.1% (1408904) · FILL 0.6% (8795) · AUTO 2.2% (32065) · SOLVE 0.0% (0) · NONE 0.1% (1925). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nh3 f6 2. Nc3 h6 … 9. Nf4 Nc6 10. Ba6 Bg7 11. Bd3 (User) · 128.0M nodes · auranvesdranor-admin-835912-atomicdb
- 1. Nh3 f6 2. Nc3 h6 … 9. Nf4 Nc6 10. Ba6 Bg7 11. Be2 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … h4 11. O-O h3 12. g3 Be7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … h4 11. O-O h3 12. g3 b5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. d4 h6 2. Na3 e5 … 6. Qe5 Be6 7. e3 b5 8. Qxc7 (User) · 512.0M nodes · BManBJ-Laptop-Blake-atomicdb
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 | 1067 | 2 | |
| g1h3 | unsolved | 781 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 436 | 2 | |
| e2e4 | unsolved | 417 | 2 | |
| b1c3 | unsolved | 155 | 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 35.2% of the fleet | 1.40T | 10,608 |
| 2 | auranvesdranor 25.8% of the fleet | 1.03T | 7,780 |
| 3 | randomchampgamer 13.7% of the fleet | 547.96B | 4,277 |
| 4 | tenzink 13.2% of the fleet | 529.06B | 3,218 |
| 5 | uipio 7.9% of the fleet | 317.54B | 1,518 |
| 6 | bricerichmond 1.9% of the fleet | 77.47B | 107 |
| 7 | gannet 1.9% of the fleet | 74.30B | 162 |
| 8 | soothdest 0.3% of the fleet | 11.94B | 83 |
| 9 | rhaxier <0.1% of the fleet | 1.66B | 13 |
| 10 | NeoArcturus <0.1% of the fleet | 142.6M | 2 |
10 accounts · 3.99T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 38.3% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.6% of the fleet | 36.76T | 307,435 |
| 3 | BManBJ 11.7% of the fleet | 27.70T | 191,110 |
| 4 | auranvesdranor 11.4% of the fleet | 26.99T | 194,369 |
| 5 | JackIV 4.3% of the fleet | 10.06T | 67,859 |
| 6 | randomchampgamer 4.1% of the fleet | 9.55T | 69,653 |
| 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 | 16,758 |
| 10 | ijh 1.5% of the fleet | 3.57T | 37,348 |
and 25 more.
35 accounts · 235.87T 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 14:36 Solved: WHITE_WIN via MINIMAXview
1. Nh3 e5 2. g3 Nc6 … f6 9. Qe1 a5 10. Bxg4 Nxa2
1. Nh3 e5 2. g3 Nc6 3. e4 Qh4 4. d4 Qg4 5. f3 Nb4 6. fxg4 d5 7. Bh3 Bg4 8. O-O f6 9. Qe1 a5 10. Bxg4 Nxa2 - Sep 28 14:36 Solved: WHITE_WIN via MATE_PVview
1. Nh3 e5 2. g3 Nc6 … Rf6 15. Rxf6 Bc5 16. Qd7 Kf8
1. Nh3 e5 2. g3 Nc6 3. e4 Qh4 4. d4 Qg4 5. f3 Nb4 6. fxg4 d5 7. Bh3 Bg4 8. O-O f6 9. Qe1 a5 10. Bxg4 Nxa2 11. Qe2 Ra6 12. Qh5 g6 13. Qh3 f5 14. exf5 Rf6 15. Rxf6 Bc5 16. Qd7 Kf8 - Sep 28 14:36 Solved: WHITE_WIN via MATE_PVview
1. Nh3 e5 2. g3 Nc6 … 14. exf5 Rf6 15. Rxf6 Bc5 16. Qd7
1. Nh3 e5 2. g3 Nc6 3. e4 Qh4 4. d4 Qg4 5. f3 Nb4 6. fxg4 d5 7. Bh3 Bg4 8. O-O f6 9. Qe1 a5 10. Bxg4 Nxa2 11. Qe2 Ra6 12. Qh5 g6 13. Qh3 f5 14. exf5 Rf6 15. Rxf6 Bc5 16. Qd7 - Sep 28 14:36 Solved: WHITE_WIN via MATE_PVview
1. Nh3 e5 2. g3 Nc6 … f5 14. exf5 Rf6 15. Rxf6 Bc5
1. Nh3 e5 2. g3 Nc6 3. e4 Qh4 4. d4 Qg4 5. f3 Nb4 6. fxg4 d5 7. Bh3 Bg4 8. O-O f6 9. Qe1 a5 10. Bxg4 Nxa2 11. Qe2 Ra6 12. Qh5 g6 13. Qh3 f5 14. exf5 Rf6 15. Rxf6 Bc5 - Sep 28 14:36 Solved: WHITE_WIN via MATE_PVview
1. Nh3 e5 2. g3 Nc6 … 13. Qh3 f5 14. exf5 Rf6 15. Rxf6
1. Nh3 e5 2. g3 Nc6 3. e4 Qh4 4. d4 Qg4 5. f3 Nb4 6. fxg4 d5 7. Bh3 Bg4 8. O-O f6 9. Qe1 a5 10. Bxg4 Nxa2 11. Qe2 Ra6 12. Qh5 g6 13. Qh3 f5 14. exf5 Rf6 15. Rxf6 - Sep 28 14:36 Solved: WHITE_WIN via MATE_PVview
1. Nh3 e5 2. g3 Nc6 … g6 13. Qh3 f5 14. exf5 Rf6
1. Nh3 e5 2. g3 Nc6 3. e4 Qh4 4. d4 Qg4 5. f3 Nb4 6. fxg4 d5 7. Bh3 Bg4 8. O-O f6 9. Qe1 a5 10. Bxg4 Nxa2 11. Qe2 Ra6 12. Qh5 g6 13. Qh3 f5 14. exf5 Rf6 - Sep 28 14:36 Solved: WHITE_WIN via MATE_PVview
1. Nh3 e5 2. g3 Nc6 … 12. Qh5 g6 13. Qh3 f5 14. exf5
1. Nh3 e5 2. g3 Nc6 3. e4 Qh4 4. d4 Qg4 5. f3 Nb4 6. fxg4 d5 7. Bh3 Bg4 8. O-O f6 9. Qe1 a5 10. Bxg4 Nxa2 11. Qe2 Ra6 12. Qh5 g6 13. Qh3 f5 14. exf5 - Sep 28 14:36 Solved: WHITE_WIN via MATE_PVview
1. Nh3 e5 2. g3 Nc6 … Ra6 12. Qh5 g6 13. Qh3 f5
1. Nh3 e5 2. g3 Nc6 3. e4 Qh4 4. d4 Qg4 5. f3 Nb4 6. fxg4 d5 7. Bh3 Bg4 8. O-O f6 9. Qe1 a5 10. Bxg4 Nxa2 11. Qe2 Ra6 12. Qh5 g6 13. Qh3 f5 - Sep 28 14:36 Solved: WHITE_WIN via MATE_PVview
1. Nh3 e5 2. g3 Nc6 … 11. Qe2 Ra6 12. Qh5 g6 13. Qh3
1. Nh3 e5 2. g3 Nc6 3. e4 Qh4 4. d4 Qg4 5. f3 Nb4 6. fxg4 d5 7. Bh3 Bg4 8. O-O f6 9. Qe1 a5 10. Bxg4 Nxa2 11. Qe2 Ra6 12. Qh5 g6 13. Qh3 - Sep 28 14:36 Solved: WHITE_WIN via MATE_PVview
1. Nh3 e5 2. g3 Nc6 … Nxa2 11. Qe2 Ra6 12. Qh5 g6
1. Nh3 e5 2. g3 Nc6 3. e4 Qh4 4. d4 Qg4 5. f3 Nb4 6. fxg4 d5 7. Bh3 Bg4 8. O-O f6 9. Qe1 a5 10. Bxg4 Nxa2 11. Qe2 Ra6 12. Qh5 g6 - Sep 28 14:36 Solved: WHITE_WIN via MATE_PVview
1. Nh3 e5 2. g3 Nc6 … 10. Bxg4 Nxa2 11. Qe2 Ra6 12. Qh5
1. Nh3 e5 2. g3 Nc6 3. e4 Qh4 4. d4 Qg4 5. f3 Nb4 6. fxg4 d5 7. Bh3 Bg4 8. O-O f6 9. Qe1 a5 10. Bxg4 Nxa2 11. Qe2 Ra6 12. Qh5 - Sep 28 14:36 Solved: WHITE_WIN via MATE_PVview
1. Nh3 e5 2. g3 Nc6 … a5 10. Bxg4 Nxa2 11. Qe2 Ra6
1. Nh3 e5 2. g3 Nc6 3. e4 Qh4 4. d4 Qg4 5. f3 Nb4 6. fxg4 d5 7. Bh3 Bg4 8. O-O f6 9. Qe1 a5 10. Bxg4 Nxa2 11. Qe2 Ra6