82.8M
positions
15.8M
practically solved
303.10T
engine nodes
2.3M
analyses
1,421
in queue
6
active workers
42
active cores
0
nodes / sec
15.6
positions / min
85
proof number
4,552
disproof number
Root conquest: 0/20 first moves solved · 19.1% of tree positions solved · last 24h: 69,623 closures, 2.81T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 70 over 218 open obligations, of which 41 (18.8%) 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 29s (median of 1) · measured at 2026-10-13 05:00 UTC
Closures by source, last 24h (69623 of 69623 labelled): USER 98.7% (68732) · FILL 0.3% (240) · AUTO 0.9% (598) · SOLVE 0.0% (0) · NONE 0.1% (53) · last 7d (1394402 of 1394402): USER 97.7% (1361763) · FILL 0.2% (2747) · AUTO 2.1% (29481) · SOLVE 0.0% (0) · NONE 0.0% (411). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nf3 f6 2. e4 e6 … 12. a5 g4 13. Ne5 fxe5 14. a6 (User) · 512.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 Nh6 … 9. Bxf4 Bh6 10. f4 b6 11. Qc1 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. Nc3 Nh6 … 9. Bxf4 Bh6 10. f4 b6 11. Qd2 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 Nh6 … 9. Bxf4 Bh6 10. f4 b6 11. Rxg6 (User) · 128.0M nodes · MoNiKaMaDnEsS-DESKTOP-VG9VPVH-atomicdb
- 1. Nf3 f6 2. Nc3 Nh6 … 9. Bxf4 Bh6 10. f4 b6 11. Qe2 (User) · 128.0M nodes · randomchampgamer-2026PC-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 | 1128 | 2 | |
| g1h3 | unsolved | 753 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| e2e4 | unsolved | 400 | 2 | |
| d2d4 | unsolved | 393 | 2 | |
| b1c3 | unsolved | 127 | 2 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b1a3 | unsolved | 0 | 3 | |
| b2b4 | unsolved | -73 | 3 | |
| h2h3 | unsolved | -97 | 2 | |
| d2d3 | unsolved | -98 | 2 | |
| a2a3 | unsolved | -100 | 2 | |
| f2f3 | unsolved | -117 | 3 | |
| b2b3 | unsolved | -144 | 1 | |
| f2f4 | unsolved | -260 | 3 | |
| h2h4 | unsolved | -500 | 2 | |
| a2a4 | unsolved | -514 | 2 | |
| g2g4 | unsolved | -604 | 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 48.6% of the fleet | 1.37T | 8,407 |
| 2 | Torom 29.0% of the fleet | 815.38B | 5,173 |
| 3 | RickEdinson 15.4% of the fleet | 432.55B | 2,700 |
| 4 | MoNiKaMaDnEsS 6.1% of the fleet | 172.12B | 1,175 |
| 5 | randomchampgamer 0.8% of the fleet | 21.87B | 174 |
5 accounts · 2.81T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 29.8% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 16.0% of the fleet | 48.57T | 337,307 |
| 3 | tenzink 14.1% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.4% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 6.0% of the fleet | 18.18T | 130,915 |
| 6 | Torom 4.8% of the fleet | 14.40T | 104,848 |
| 7 | RickEdinson 4.2% of the fleet | 12.58T | 83,240 |
| 8 | JackIV 3.3% of the fleet | 10.06T | 67,859 |
| 9 | gannet 2.4% of the fleet | 7.24T | 46,848 |
| 10 | MoNiKaMaDnEsS 2.3% of the fleet | 7.03T | 47,593 |
and 25 more.
35 accounts · 303.20T 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 · 18 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 · 5 votes
- The weaker of the two f-pawn advances for 1. ...d61. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4proposed by MoNiKaMaDnEsS · 4 votes
- Refuting 1... d61. Nf3 d6 2. Nc3proposed by randomchampgamer · 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 23 proposals · see every proposal
Milestones
- Oct 13 05:48 Solved: BLACK_WIN via MINIMAXview
1. Nf3 f6 2. e4 e6 … 8. Rg1 Bh6 9. f4 b6 10. h5
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 f5 6. h4 fxg4 7. Bxh6 g6 8. Rg1 Bh6 9. f4 b6 10. h5 - Oct 13 05:48 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 12. Rg3 Bxf4 13. Ke2 Qf2 14. Kd3
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 f5 6. h4 fxg4 7. Bxh6 g6 8. Rg1 Bh6 9. f4 b6 10. h5 Ba6 11. Bxa6 Qh4 12. Rg3 Bxf4 13. Ke2 Qf2 14. Kd3 - Oct 13 05:48 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Qh4 12. Rg3 Bxf4 13. Ke2 Qf2
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 f5 6. h4 fxg4 7. Bxh6 g6 8. Rg1 Bh6 9. f4 b6 10. h5 Ba6 11. Bxa6 Qh4 12. Rg3 Bxf4 13. Ke2 Qf2 - Oct 13 05:48 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 11. Bxa6 Qh4 12. Rg3 Bxf4 13. Ke2
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 f5 6. h4 fxg4 7. Bxh6 g6 8. Rg1 Bh6 9. f4 b6 10. h5 Ba6 11. Bxa6 Qh4 12. Rg3 Bxf4 13. Ke2 - Oct 13 05:48 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Ba6 11. Bxa6 Qh4 12. Rg3 Bxf4
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 f5 6. h4 fxg4 7. Bxh6 g6 8. Rg1 Bh6 9. f4 b6 10. h5 Ba6 11. Bxa6 Qh4 12. Rg3 Bxf4 - Oct 13 05:48 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 10. h5 Ba6 11. Bxa6 Qh4 12. Rg3
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 f5 6. h4 fxg4 7. Bxh6 g6 8. Rg1 Bh6 9. f4 b6 10. h5 Ba6 11. Bxa6 Qh4 12. Rg3 - Oct 13 05:48 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … b6 10. h5 Ba6 11. Bxa6 Qh4
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 f5 6. h4 fxg4 7. Bxh6 g6 8. Rg1 Bh6 9. f4 b6 10. h5 Ba6 11. Bxa6 Qh4 - Oct 13 05:48 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 9. f4 b6 10. h5 Ba6 11. Bxa6
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 f5 6. h4 fxg4 7. Bxh6 g6 8. Rg1 Bh6 9. f4 b6 10. h5 Ba6 11. Bxa6 - Oct 13 05:48 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Bh6 9. f4 b6 10. h5 Ba6
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 f5 6. h4 fxg4 7. Bxh6 g6 8. Rg1 Bh6 9. f4 b6 10. h5 Ba6 - Oct 13 05:48 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 11. Rg3 Bxf4 12. Ke2 Qf2 13. Kd3
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 f5 6. h4 fxg4 7. Bxh6 g6 8. Rg1 Bh6 9. f4 b6 10. h5 Qh4 11. Rg3 Bxf4 12. Ke2 Qf2 13. Kd3 - Oct 13 05:48 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Qh4 11. Rg3 Bxf4 12. Ke2 Qf2
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 f5 6. h4 fxg4 7. Bxh6 g6 8. Rg1 Bh6 9. f4 b6 10. h5 Qh4 11. Rg3 Bxf4 12. Ke2 Qf2 - Oct 13 05:48 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 10. h5 Qh4 11. Rg3 Bxf4 12. Ke2
1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 f5 6. h4 fxg4 7. Bxh6 g6 8. Rg1 Bh6 9. f4 b6 10. h5 Qh4 11. Rg3 Bxf4 12. Ke2