MESON Chess Problem Database
Problem Display
PID: 227818 (Q7/6pp/7k/8/6K1/8/8/8 w - - 0 1)
Langweil, Walter
Sudetendeutsche Schachblatter, 1926
#2
2 + 3
| 6490 | yacpdb | 2020 |
| 5454 | Near Snap | 2021 |
| 3713 | Snap | 2021 |
SOLUTION
- SOUND
- Sets
- 1...g6
- 2.Qf8#
- 1...g6
- Tries
- 1.Qf3?
- 1...g5
- 2.Qf6#
- 1...g6
- 2.Qf8#
- 1...Kg6!
- 1...g5
- 1.Qd5?
- threat
- 2.Qg5#
- 2.Qh5#
- 1...Kg6
- 2.Qe6#
- 1...g5
- 2.Qxg5#
- 1...g6!
- threat
- 1.Qc8?
- 1...Kg6
- 2.Qe6#
- 1...g6
- 2.Qf8#
- 1...g5!
- 1...Kg6
- 1.Qd8?
- threat
- 2.Qg5#
- 1...g5
- 2.Qxg5#
- 2.Qf6#
- 1...g6
- 2.Qf8#
- 1...Kg6!
- threat
- 1.Qe8?
- threat
- 2.Qh5#
- 1...g6
- 2.Qf8#
- 1...g5!
- threat
- 1.Qh8?
- 1...g6
- 2.Qf8#
- 1...g5
- 2.Qf6#
- 1...Kg6!
- 1...g6
- 1.Qf3?
- Keys
- 1.Qg8!
- 1...Kg6
- 2.Qe6#
- 1...g6
- 2.Qf8#
- 1...g5
- 2.Qxg5#
- 1...Kg6
- 1.Qg8!
This anticipates 102122(1930), 86898(1975), 247167(1998), 250761(1999)
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- P(b);OGATEB,SBLOCK::QAB(B)
- Tries
- Try
- Q(B);
- Vars
- P(b);N_GUARD::QAR2(B)
- P(b);OGATEB,SBLOCK::QAB(B)
- Refutation
- K(a);P-FLIGHT
- Try
- Q(B);
- Threat
- DUALS(2)
- Vars
- K(a);P-FLIGHT::QAR2(B)
- P(b);::QAB1(B),XP(b)
- Refutation
- P(b);
- Try
- Q(B);
- Vars
- K(a);P-FLIGHT::QAR2(B)
- P(b);OGATEB,SBLOCK::QAB(B)
- Refutation
- P(b);
- Try
- Q(B);
- Threat
- QAB1(B)
- Vars
- P(b);OGATEB,SBLOCK::QAB(B)
- Refutation
- K(a);P-FLIGHT
- Try
- Q(B);
- Threat
- QAR1(B)
- Vars
- P(b);OGATEB,SBLOCK::QAB(B)
- Refutation
- P(b);
- Try
- Q(B);P_PINP(c)
- Vars
- P(b);OGATEB,SBLOCK::QAB(B)
- P(b);OGATE::QAR2(B)
- Refutation
- K(a);N_SPINP(c),P-FLIGHT
- Try
- Actual
- Q(B);
- Vars
- K(a);P-FLIGHT,P_SPINP(b)::QAR2(B)
- P(b);OGATEB,SBLOCK::QAB(B)
- P(b);OGATE::QAB1(B),XP(b)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).