MESON Chess Problem Database
Problem Display
PID: 180416 (8/8/8/3Q2Np/5Kpk/5P1P/8/8 w - - 0 1)
Lider, Valentin Viktorovich
Problemista, 1970
#2
5 + 3
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Tries
- 1.Qa2?
- 1...gxf3
- 2.Qf2#
- 1...gxh3
- 2.Qf2#
- 1...g3!
- 1...gxf3
- 1.Qe4?
- 1...gxh3
- 2.Qe1#
- 1...g3
- 2.Kf5#
- 1...gxf3!
- 1...gxh3
- 1.Qe6?
- 1...gxf3
- 2.Sxf3#
- 1...gxh3
- 2.Qxh3#
- 2.Qe1#
- 1...g3!
- 1...gxf3
- 1.Qd2?
- 1...gxf3
- 2.Qf2#
- 1...gxh3
- 2.Qe1#
- 2.Qf2#
- 1...g3!
- 1...gxf3
- 1.Qc5?
- 1...gxf3
- 2.Qf2#
- 1...gxh3
- 2.Qf2#
- 1...g3!
- 1...gxf3
- 1.Qf5?
- 1...gxf3
- 2.Sxf3#
- 1...gxh3
- 2.Qxh3#
- 1...g3!
- 1...gxf3
- 1.Qd7?
- 1...gxf3
- 2.Sxf3#
- 1...gxh3
- 2.Qxh3#
- 1...g3!
- 1...gxf3
- 1.Qa2?
- Keys
- 1.Qd4!
- 1...gxf3
- 2.Qf2#
- 1...gxh3
- 2.Qf2#
- 1...g3
- 2.Kf5#
- 1...gxf3
- 1.Qd4!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 0
- Sets
- Tries
- Try
- Q(D);
- Vars
- P(a);N_GUARD,XP(A)::QAB(D)
- P(a);N_GUARD,XP(B)::QAB(D)
- Refutation
- P(a);
- Try
- Q(D);
- Vars
- P(a);N_GUARD,XP(B)::QAB(D)
- P(a);SBLOCK::QAR(D)+K(C)
- Refutation
- P(a);XP(A)
- Try
- Q(D);
- Vars
- P(a);XP(A)::S(E),XP(a)
- Refutation
- P(a);
- Try
- Q(D);
- Vars
- P(a);N_GUARD,XP(A)::QAB(D)
- Refutation
- P(a);
- Try
- Q(D);
- Vars
- P(a);N_GUARD,XP(A)::QAB(D)
- P(a);N_GUARD,XP(B)::QAB(D)
- Refutation
- P(a);
- Try
- Q(D);
- Vars
- P(a);XP(A)::S(E),XP(a)
- P(a);OGATE,XP(B)::QAR1(D),XP(a)
- Refutation
- P(a);
- Try
- Q(D);
- Vars
- P(a);XP(A)::S(E),XP(a)
- P(a);OGATE,XP(B)::QAR1(D),XP(a)
- Refutation
- P(a);
- Try
- Actual
- Q(D);
- Vars
- P(a);N_GUARD,XP(A)::QAB(D)
- P(a);N_GUARD,XP(B)::QAB(D)
- P(a);SBLOCK::QAR(D)+K(C)
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).