69.0M
positions
12.5M
practically solved
248.22T
engine nodes
1.9M
analyses
4,846
in queue
17
active workers
120
active cores
7.1M
nodes / sec
36.7
positions / min
57
proof number
3,808
disproof number
Root conquest: 0/20 first moves solved · 18.1% of tree positions solved · last 24h: 397,260 closures, 6.93T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 81 over 200 open obligations, of which 32 (16.0%) 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 4.5h (median of 136) · measured at 2026-09-30 12:00 UTC
Closures by source, last 24h (397118 of 397118 labelled): USER 99.9% (396881) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.1% (237) · last 7d (2159998 of 2160140): USER 98.0% (2116373) · FILL 0.4% (8795) · AUTO 1.5% (32065) · SOLVE 0.0% (0) · NONE 0.1% (2765). 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 … 20. Kg1 a5 21. Be5 Ba6 22. Bf6 (User) · 128.0M nodes · auranvesdranor-admin-835912-atomicdb
- 1. Nh3 e6 2. e3 g6 … 20. Kg1 a5 21. Be5 Ba6 22. Bf4 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … 14. e5 Nb6 15. Ne2 Rd8 16. Qd2 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … 14. e5 Nb6 15. Ne2 Rc8 16. Bc6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … 14. e5 Nb6 15. Ne2 Kh7 16. Be8 (User) · 128.0M 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 | 1031 | 2 | |
| g1h3 | unsolved | 658 | 2 | |
| e2e3 | unsolved | 453 | 3 | |
| d2d4 | unsolved | 437 | 2 | |
| e2e4 | unsolved | 407 | 2 | |
| b1c3 | unsolved | 142 | 2 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b2b4 | unsolved | 0 | 3 | |
| b1a3 | unsolved | 0 | 3 | |
| h2h3 | unsolved | -98 | 2 | |
| a2a3 | unsolved | -103 | 2 | |
| d2d3 | unsolved | -116 | 2 | |
| f2f3 | unsolved | -117 | 3 | |
| b2b3 | unsolved | -169 | 1 | |
| f2f4 | unsolved | -302 | 3 | |
| h2h4 | unsolved | -500 | 2 | |
| a2a4 | unsolved | -510 | 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 | gannet 40.2% of the fleet | 2.78T | 21,257 |
| 2 | BManBJ 21.3% of the fleet | 1.48T | 11,322 |
| 3 | auranvesdranor 14.6% of the fleet | 1.01T | 7,721 |
| 4 | tenzink 8.9% of the fleet | 615.13B | 4,408 |
| 5 | randomchampgamer 8.5% of the fleet | 591.26B | 4,738 |
| 6 | RickEdinson 3.4% of the fleet | 234.54B | 1,608 |
| 7 | MoNiKaMaDnEsS 3.1% of the fleet | 212.59B | 1,592 |
| 8 | soothdest <0.1% of the fleet | 1.31B | 21 |
8 accounts · 6.93T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 36.4% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.3% of the fleet | 37.88T | 315,231 |
| 3 | BManBJ 12.3% of the fleet | 30.48T | 212,129 |
| 4 | auranvesdranor 11.7% of the fleet | 28.96T | 209,396 |
| 5 | randomchampgamer 4.3% of the fleet | 10.71T | 78,996 |
| 6 | JackIV 4.1% of the fleet | 10.06T | 67,859 |
| 7 | RickEdinson 2.8% of the fleet | 6.96T | 46,195 |
| 8 | gannet 1.8% of the fleet | 4.59T | 26,551 |
| 9 | MoNiKaMaDnEsS 1.8% of the fleet | 4.52T | 29,480 |
| 10 | NeoArcturus 1.6% of the fleet | 4.09T | 16,758 |
and 25 more.
35 accounts · 248.32T 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 30 12:28 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … Rf5 23. exf5 b5 24. Re7 Kd8
1. Nh3 d5 2. Nc3 h6 3. e4 Bd7 4. d4 e6 5. Bb5 c6 6. Bxc6 Bb4 7. O-O Qa5 8. f4 Bxc3 9. b4 Qc7 10. c4 Na6 11. c5 Nf6 12. Ng5 hxg5 13. h4 g5 14. fxg5 f6 15. g3 e5 16. Bh6 Qc8 17. Qg4 f5 18. Rae1 Qb8 19. Qxf5 exd4 20. Rf7 Qf4 21. Bxf4 Rh5 22. Ref1 Rf5 23. exf5 b5 24. Re7 Kd8 - Sep 30 12:28 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … 22. Ref1 Rf5 23. exf5 b5 24. Re7
1. Nh3 d5 2. Nc3 h6 3. e4 Bd7 4. d4 e6 5. Bb5 c6 6. Bxc6 Bb4 7. O-O Qa5 8. f4 Bxc3 9. b4 Qc7 10. c4 Na6 11. c5 Nf6 12. Ng5 hxg5 13. h4 g5 14. fxg5 f6 15. g3 e5 16. Bh6 Qc8 17. Qg4 f5 18. Rae1 Qb8 19. Qxf5 exd4 20. Rf7 Qf4 21. Bxf4 Rh5 22. Ref1 Rf5 23. exf5 b5 24. Re7 - Sep 30 12:28 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … Rh5 22. Ref1 Rf5 23. exf5 b5
1. Nh3 d5 2. Nc3 h6 3. e4 Bd7 4. d4 e6 5. Bb5 c6 6. Bxc6 Bb4 7. O-O Qa5 8. f4 Bxc3 9. b4 Qc7 10. c4 Na6 11. c5 Nf6 12. Ng5 hxg5 13. h4 g5 14. fxg5 f6 15. g3 e5 16. Bh6 Qc8 17. Qg4 f5 18. Rae1 Qb8 19. Qxf5 exd4 20. Rf7 Qf4 21. Bxf4 Rh5 22. Ref1 Rf5 23. exf5 b5 - Sep 30 12:28 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … 21. Bxf4 Rh5 22. Ref1 Rf5 23. exf5
1. Nh3 d5 2. Nc3 h6 3. e4 Bd7 4. d4 e6 5. Bb5 c6 6. Bxc6 Bb4 7. O-O Qa5 8. f4 Bxc3 9. b4 Qc7 10. c4 Na6 11. c5 Nf6 12. Ng5 hxg5 13. h4 g5 14. fxg5 f6 15. g3 e5 16. Bh6 Qc8 17. Qg4 f5 18. Rae1 Qb8 19. Qxf5 exd4 20. Rf7 Qf4 21. Bxf4 Rh5 22. Ref1 Rf5 23. exf5 - Sep 30 12:28 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … Qf4 21. Bxf4 Rh5 22. Ref1 Rf5
1. Nh3 d5 2. Nc3 h6 3. e4 Bd7 4. d4 e6 5. Bb5 c6 6. Bxc6 Bb4 7. O-O Qa5 8. f4 Bxc3 9. b4 Qc7 10. c4 Na6 11. c5 Nf6 12. Ng5 hxg5 13. h4 g5 14. fxg5 f6 15. g3 e5 16. Bh6 Qc8 17. Qg4 f5 18. Rae1 Qb8 19. Qxf5 exd4 20. Rf7 Qf4 21. Bxf4 Rh5 22. Ref1 Rf5 - Sep 30 12:28 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … 20. Rf7 Qf4 21. Bxf4 Rh5 22. Ref1
1. Nh3 d5 2. Nc3 h6 3. e4 Bd7 4. d4 e6 5. Bb5 c6 6. Bxc6 Bb4 7. O-O Qa5 8. f4 Bxc3 9. b4 Qc7 10. c4 Na6 11. c5 Nf6 12. Ng5 hxg5 13. h4 g5 14. fxg5 f6 15. g3 e5 16. Bh6 Qc8 17. Qg4 f5 18. Rae1 Qb8 19. Qxf5 exd4 20. Rf7 Qf4 21. Bxf4 Rh5 22. Ref1 - Sep 30 12:28 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … exd4 20. Rf7 Qf4 21. Bxf4 Rh5
1. Nh3 d5 2. Nc3 h6 3. e4 Bd7 4. d4 e6 5. Bb5 c6 6. Bxc6 Bb4 7. O-O Qa5 8. f4 Bxc3 9. b4 Qc7 10. c4 Na6 11. c5 Nf6 12. Ng5 hxg5 13. h4 g5 14. fxg5 f6 15. g3 e5 16. Bh6 Qc8 17. Qg4 f5 18. Rae1 Qb8 19. Qxf5 exd4 20. Rf7 Qf4 21. Bxf4 Rh5 - Sep 30 12:28 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … 19. Qxf5 exd4 20. Rf7 Qf4 21. Bxf4
1. Nh3 d5 2. Nc3 h6 3. e4 Bd7 4. d4 e6 5. Bb5 c6 6. Bxc6 Bb4 7. O-O Qa5 8. f4 Bxc3 9. b4 Qc7 10. c4 Na6 11. c5 Nf6 12. Ng5 hxg5 13. h4 g5 14. fxg5 f6 15. g3 e5 16. Bh6 Qc8 17. Qg4 f5 18. Rae1 Qb8 19. Qxf5 exd4 20. Rf7 Qf4 21. Bxf4 - Sep 30 12:28 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … Qb8 19. Qxf5 exd4 20. Rf7 Qf4
1. Nh3 d5 2. Nc3 h6 3. e4 Bd7 4. d4 e6 5. Bb5 c6 6. Bxc6 Bb4 7. O-O Qa5 8. f4 Bxc3 9. b4 Qc7 10. c4 Na6 11. c5 Nf6 12. Ng5 hxg5 13. h4 g5 14. fxg5 f6 15. g3 e5 16. Bh6 Qc8 17. Qg4 f5 18. Rae1 Qb8 19. Qxf5 exd4 20. Rf7 Qf4 - Sep 30 12:28 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … 18. Rae1 Qb8 19. Qxf5 exd4 20. Rf7
1. Nh3 d5 2. Nc3 h6 3. e4 Bd7 4. d4 e6 5. Bb5 c6 6. Bxc6 Bb4 7. O-O Qa5 8. f4 Bxc3 9. b4 Qc7 10. c4 Na6 11. c5 Nf6 12. Ng5 hxg5 13. h4 g5 14. fxg5 f6 15. g3 e5 16. Bh6 Qc8 17. Qg4 f5 18. Rae1 Qb8 19. Qxf5 exd4 20. Rf7 - Sep 30 12:28 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … f5 18. Rae1 Qb8 19. Qxf5 exd4
1. Nh3 d5 2. Nc3 h6 3. e4 Bd7 4. d4 e6 5. Bb5 c6 6. Bxc6 Bb4 7. O-O Qa5 8. f4 Bxc3 9. b4 Qc7 10. c4 Na6 11. c5 Nf6 12. Ng5 hxg5 13. h4 g5 14. fxg5 f6 15. g3 e5 16. Bh6 Qc8 17. Qg4 f5 18. Rae1 Qb8 19. Qxf5 exd4 - Sep 30 12:28 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … 17. Qg4 f5 18. Rae1 Qb8 19. Qxf5
1. Nh3 d5 2. Nc3 h6 3. e4 Bd7 4. d4 e6 5. Bb5 c6 6. Bxc6 Bb4 7. O-O Qa5 8. f4 Bxc3 9. b4 Qc7 10. c4 Na6 11. c5 Nf6 12. Ng5 hxg5 13. h4 g5 14. fxg5 f6 15. g3 e5 16. Bh6 Qc8 17. Qg4 f5 18. Rae1 Qb8 19. Qxf5