MESON Chess Problem Database
Problem Display
PID: 243779 (5B2/3K4/8/p5Q1/kn6/8/1R6/8 w - - 0 1)
Thorsson, Allan Birger
Tidskrift for Schack, 1981
#2
4 + 3
SOLUTION
- SOUND
- Sets
- 1...Sa2
- 2.Qb5#
- 1...Sc2
- 2.Qb5#
- 1...Sd3
- 2.Qb5#
- 1...Sa6
- 2.Qb5#
- 1...Sc6
- 2.Qb5#
- 1...Sa2
- Tries
- 1.Rb1?
- 1...Ka3
- 2.Qxa5#
- 1...Sa2
- 2.Qb5#
- 1...Sc2
- 2.Qb5#
- 1...Sd3
- 2.Qb5#
- 1...Sa6
- 2.Qb5#
- 1...Sc6
- 2.Qb5#
- 1...Sd5!
- 1...Ka3
- 1.Rxb4+?
- 1...Ka3
- 2.Qxa5#
- 1...axb4!
- 1...Ka3
- 1.Qf6?
- 1...Kb5
- 2.Qc6#
- 1...Sd5
- 2.Qc6#
- 1...Sa2
- 2.Qc6#
- 1...Sc2
- 2.Qc6#
- 1...Sd3
- 2.Qc6#
- 1...Sa6
- 2.Qc6#
- 1...Sc6
- 2.Qxc6#
- 1...Ka3!
- 1...Kb5
- 1.Qh6?
- 1...Kb5
- 2.Qc6#
- 1...Sd5
- 2.Qc6#
- 1...Sa2
- 2.Qc6#
- 1...Sc2
- 2.Qc6#
- 1...Sd3
- 2.Qc6#
- 1...Sa6
- 2.Qc6#
- 1...Sc6
- 2.Qxc6#
- 1...Ka3!
- 1...Kb5
- 1.Qg2?
- 1...Kb5
- 2.Qc6#
- 1...Sd5
- 2.Qc2#
- 1...Sa2
- 2.Qc6#
- 2.Qc2#
- 1...Sc2
- 2.Qc6#
- 2.Qxc2#
- 1...Sd3
- 2.Qc6#
- 2.Qc2#
- 1...Sa6
- 2.Qc6#
- 2.Qc2#
- 1...Sc6
- 2.Qxc6#
- 2.Qc2#
- 1...Ka3!
- 1...Kb5
- 1.Qc5?
- 1...Sd5
- 2.Qa3#
- 2.Qc2#
- 2.Qb5#
- 2.Qc6#
- 1...Sa2
- 2.Qa3#
- 2.Qc2#
- 2.Qb5#
- 2.Qc6#
- 1...Sc2
- 2.Qxc2#
- 2.Qb5#
- 2.Qc6#
- 1...Sd3
- 2.Qa3#
- 2.Qc2#
- 2.Qb5#
- 2.Qc6#
- 1...Sa6
- 2.Qa3#
- 2.Qc2#
- 2.Qb5#
- 2.Qc6#
- 1...Sc6
- 2.Qa3#
- 2.Qc2#
- 2.Qb5#
- 2.Qxc6#
- 1...Ka3!
- 1...Sd5
- 1.Qd5?
- 1...Ka3
- 2.Ra2#
- 2.Qa2#
- 2.Qb3#
- 1...Sa2
- 2.Rxa2#
- 2.Qxa2#
- 2.Qb3#
- 2.Qc6#
- 2.Qd1#
- 2.Qb5#
- 1...Sc2
- 2.Qb3#
- 2.Qc6#
- 2.Qb5#
- 1...Sd3
- 2.Ra2#
- 2.Qa2#
- 2.Qb3#
- 2.Qc6#
- 2.Qb5#
- 1...Sa6
- 2.Ra2#
- 2.Qa2#
- 2.Qb3#
- 2.Qc6#
- 2.Qd1#
- 2.Qb5#
- 1...Sc6
- 2.Ra2#
- 2.Qa2#
- 2.Qb3#
- 2.Qxc6#
- 2.Qd1#
- 2.Qb5#
- 1...Sxd5!
- 1...Ka3
- 1.Qf5?
- 1...Sd5
- 2.Qc2#
- 1...Sa2
- 2.Qc2#
- 2.Qb5#
- 1...Sc2
- 2.Qxc2#
- 2.Qb5#
- 1...Sd3
- 2.Qb5#
- 1...Sa6
- 2.Qc2#
- 2.Qb5#
- 1...Sc6
- 2.Qc2#
- 2.Qb5#
- 1...Ka3!
- 1...Sd5
- 1.Qh5?
- 1...Sd5
- 2.Qd1#
- 1...Sa2
- 2.Qd1#
- 2.Qb5#
- 1...Sc2
- 2.Qb5#
- 1...Sd3
- 2.Qd1#
- 2.Qb5#
- 1...Sa6
- 2.Qd1#
- 2.Qb5#
- 1...Sc6
- 2.Qd1#
- 2.Qb5#
- 1...Ka3!
- 1...Sd5
- 1.Qg6?
- 1...Kb5
- 2.Qc6#
- 1...Sd5
- 2.Qc2#
- 2.Qc6#
- 1...Sa2
- 2.Qc2#
- 2.Qc6#
- 1...Sc2
- 2.Qxc2#
- 2.Qc6#
- 1...Sd3
- 2.Qc6#
- 1...Sa6
- 2.Qc2#
- 2.Qc6#
- 1...Sc6
- 2.Qc2#
- 2.Qxc6#
- 1...Ka3!
- 1...Kb5
- 1.Rb1?
- Keys
- 1.Qc1!
- 1...Ka3
- 2.Qa1#
- 1...Kb5
- 2.Qc6#
- 1...Sd5
- 2.Qa1#
- 2.Qd1#
- 2.Qc2#
- 2.Qc6#
- 1...Sa2
- 2.Qd1#
- 2.Qc2#
- 2.Qc6#
- 1...Sc2
- 2.Qxc2#
- 1...Sd3
- 2.Qa1#
- 2.Qd1#
- 2.Qc2#
- 2.Qc6#
- 1...Sa6
- 2.Qa1#
- 2.Qd1#
- 2.Qc2#
- 2.Qc6#
- 1...Sc6
- 2.Qa1#
- 2.Qd1#
- 2.Qc2#
- 2.Qxc6#
- 1...Ka3
- 1.Qc1!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 1
- ADDED MATES = 2
- REMOVED MATES = 4
- Sets
- S(b);::QAB1(B)
- Tries
- Try
- R(A);
- Vars
- K(a);P-FLIGHT,P_SPINS(b)::QAR2(B),XP(c)
- S(b);::QAB1(B)
- Refutation
- S(b);
- Try
- R(A);CHECK,XS(b)
- Vars
- K(a);P-FLIGHT::QAR2(B),XP(c)
- Refutation
- P(c);XR(A)
- Try
- Q(B);
- Vars
- K(a);P_SPINS(b),S_FLIGHT::QAB1(B)
- S(b);N_GUARD::QAB(B)
- S(b);N_GUARD::QAB(B),XS(b)
- Refutation
- K(a);P-FLIGHT,P_SPINS(b)
- Try
- Q(B);
- Vars
- K(a);P_SPINS(b),S_FLIGHT::QAB1(B)
- S(b);N_GUARD::QAB(B)
- S(b);N_GUARD::QAB(B),XS(b)
- Refutation
- K(a);P-FLIGHT,P_SPINS(b)
- Try
- Q(B);
- Vars
- K(a);P_SPINS(b),S_FLIGHT::QAB1(B)
- S(b);N_GUARD::QAB(B)
- Refutation
- K(a);P-FLIGHT,P_SPINS(b)
- Try
- Q(B);
- Refutation
- K(a);P-FLIGHT,P_SPINS(b)
- Try
- Q(B);
- Refutation
- S(b);XQ(B)
- Try
- Q(B);
- Vars
- S(b);N_GUARD::QAB(B)
- S(b);::QAB1(B)
- Refutation
- K(a);P-FLIGHT,P_SPINS(b)
- Try
- Q(B);
- Vars
- S(b);N_GUARD::QAB(B)
- S(b);::QAB1(B)
- Refutation
- K(a);P-FLIGHT,P_SPINS(b)
- Try
- Q(B);
- Vars
- K(a);P_SPINS(b),S_FLIGHT::QAB1(B)
- S(b);N_GUARD::QAB(B)
- Refutation
- K(a);P-FLIGHT,P_SPINS(b)
- Try
- Actual
- Q(B);
- Vars
- K(a);P-FLIGHT,P_SPINS(b)::QAR2(B)
- K(a);P_SPINS(b),S_FLIGHT::QAB1(B)
- S(b);N_GUARD::QAB(B),XS(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).