MESON Chess Problem Database
Problem Display
PID: 244955 (6q1/P5Qr/3PB2p/8/8/5RpP/1p2PNkP/1K2b2R w - - 0 1)
Prins, Hendrik
The Problemist, 1989
#2
11 + 7
SOLUTION
- SOUND
- Sets
- 1...Qxe6
- 2.Qxg3#
- 1...Qf7
- 2.Qxg3#
- 1...Qa8
- 2.Qxg3#
- 1...Qb8
- 2.Qxg3#
- 1...Qc8
- 2.Qxg3#
- 1...Qd8
- 2.Qxg3#
- 1...Qe8
- 2.Qxg3#
- 1...Qf8
- 2.Qxg3#
- 1...Qh8
- 2.Qxg3#
- 1...Qxe6
- Tries
- 1.Rf7?
- threat
- 2.Bd5#
- 1...Qxf7
- 2.Qxg3#
- 1...Qa8
- 2.Qxg3#
- 1...Qe8
- 2.Qxg3#
- 1...Bxf2!
- threat
- 1.Rf8?
- threat
- 2.a8Q#
- 2.a8B#
- 1...Qxe6
- 2.Qxg3#
- 1...Qxg7
- 2.Bd5#
- 1...Qxf8
- 2.Qxg3#
- 1...Bxf2
- 2.a8Q#
- 2.a8B#
- 1...Qf7
- 2.Qxg3#
- 1...Qh8
- 2.Bd5#
- 2.Qxg3#
- 2.a8Q#
- 2.a8B#
- 1...Rh8
- 2.Qb7#
- 2.a8Q#
- 2.a8B#
- 1...Bd2
- 2.a8Q#
- 2.a8B#
- 1...Bc3
- 2.a8Q#
- 2.a8B#
- 1...Bb4
- 2.a8Q#
- 2.a8B#
- 1...Ba5
- 2.a8Q#
- 2.a8B#
- 1...h5
- 2.a8Q#
- 2.a8B#
- 1...Rxg7!
- threat
- 1.h4?
- threat
- 2.Bh3#
- 1...Qxe6
- 2.Qxg3#
- 1...Qc8
- 2.Qxg3#
- 1...Bxf2!
- threat
- 1.a8Q?
- threat
- 2.Rf8#
- 1...Qxe6
- 2.Qxg3#
- 1...Qxg7
- 2.Rf7#
- 1...Qxa8
- 2.Qxg3#
- 1...Qf7
- 2.Rxf7#
- 2.Qxg3#
- 1...Qb8
- 2.Qxg3#
- 1...Qc8
- 2.Qxg3#
- 1...Qd8
- 2.Qxg3#
- 1...Qe8
- 2.Qxg3#
- 1...Qf8
- 2.Rxf8#
- 2.Qxg3#
- 1...Rxg7!
- threat
- 1.a8B?
- threat
- 2.Rf8#
- 1...Qxe6
- 2.Qxg3#
- 1...Qxg7
- 2.Rf7#
- 1...Qxa8
- 2.Qxg3#
- 1...Qf7
- 2.Rxf7#
- 2.Qxg3#
- 1...Qb8
- 2.Qxg3#
- 1...Qc8
- 2.Qxg3#
- 1...Qd8
- 2.Qxg3#
- 1...Qe8
- 2.Qxg3#
- 1...Qf8
- 2.Rxf8#
- 2.Qxg3#
- 1...Rxg7!
- threat
- 1.Rf7?
- Keys
- 1.Bd5!
- threat
- 2.Rf7#
- 1...Qxd5
- 2.Qxg3#
- 1...Bxf2
- 2.Rxg3#
- 1...Qe6
- 2.Qxg3#
- 1...Qf7
- 2.Rxf7#
- 2.Qxg3#
- 1...Qa8
- 2.Qxg3#
- 1...Qe8
- 2.Qxg3#
- threat
- 1.Bd5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 6
- Sets
- Q(g);N_GUARD,XB(I)::QAR1(K),XP(d)
- Q(g);N_GUARD::QAR1(K),XP(d)
- Tries
- Try
- R(F);
- Threat
- B(I)
- Vars
- Q(g);N_GUARD,XR(F)::QAR1(K),XP(d)
- Q(g);N_GUARD::QAR1(K),XP(d)
- Refutation
- B(a);XS(D)
- Try
- R(F);
- Threat
- P=Q
- Vars
- Q(g);N_GUARD,XB(I)::QAR1(K),XP(d)
- Q(g);N_GUARD,N_SPINP(d),XQ(K)::B(I)
- Q(g);N_GUARD,XR(F)::QAR1(K),XP(d)
- B(a);XS(D)::P=Q
- Q(g);N_GUARD::QAR1(K),XP(d)
- B(a);::P=Q
- P(e);::P=Q
- Refutation
- R(f);N_SPINP(d),XQ(K)
- Try
- P(G);
- Threat
- B(I)
- Vars
- Q(g);N_GUARD,XB(I)::QAR1(K),XP(d)
- Q(g);N_GUARD::QAR1(K),XP(d)
- Refutation
- B(a);XS(D)
- Try
- P(J);
- Threat
- QAB(J)+R(F)
- Vars
- Q(g);N_GUARD,XB(I)::QAR1(K),XP(d)
- Q(g);N_GUARD,N_SPINP(d),XQ(K)::QAB(J)+R(F)
- Q(g);N_GUARD,XQ(J)::QAR1(K),XP(d)
- Q(g);N_GUARD::QAR1(K),XP(d)
- Refutation
- R(f);N_SPINP(d),XQ(K)
- Try
- P(J);
- Threat
- B(J)+R(F)
- Vars
- Q(g);N_GUARD,XB(I)::QAR1(K),XP(d)
- Q(g);N_GUARD,N_SPINP(d),XQ(K)::B(J)+R(F)
- Q(g);N_GUARD,XB(J)::QAR1(K),XP(d)
- Q(g);N_GUARD::QAR1(K),XP(d)
- Refutation
- R(f);N_SPINP(d),XQ(K)
- Try
- Actual
- B(I);
- Threat
- B(I)+R(F)
- Vars
- Q(g);N_GUARD,XB(I)::QAR1(K),XP(d)
- B(a);SBLOCK,XS(D)::B(I)+R(F),DCHECK,XP(d)
- Q(g);N_GUARD::QAR1(K),XP(d)
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).