MESON Chess Problem Database

Problem Display
PID: 11726 (5k1N/5B1q/5KQ1/7R/8/8/8/8 w - - 0 1)

Dombrovskis, Alfreds A

Loshinski, Lev Ilich

1st Prize, Mini-Matt, 1971

5k1N/5B1q/5KQ1/7R/8/8/8/8

#2

5 + 2

3296 Shakhmatny zadachi miniaturi 1987
2838 Fun with Chess Miniatures 1996
145 StrateGems 2007
14869 British Championship Solving Ty. 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Qxg6+
      • 2.Sxg6#
    • 1...Qg8
      • 2.Qxg8#
    • 1...Qxh5
      • 2.Qg7#
      • 2.Qg8#
    • 1...Qh6
      • 2.Qxh6#
    • 1...Qxf7+
      • 2.Qxf7#
    • 1...Qg7+
      • 2.Qxg7#
    • 1...Qxh8+
      • 2.Rxh8#
  • Tries
    • 1.Rh1?
      • 1...Qxg6+
        • 2.Sxg6#
      • 1...Qxf7+
        • 2.Qxf7#
      • 1...Qg7+
        • 2.Qxg7#
      • 1...Qxh8+
        • 2.Rxh8#
      • 1...Qxh1
        • 2.Qg7#
        • 2.Qg8#
      • 1...Qg8
        • 2.Qxg8#
      • 1...Qh2
        • 2.Qg7#
        • 2.Qg8#
      • 1...Qh3
        • 2.Qg7#
        • 2.Qg8#
      • 1...Qh5
        • 2.Qg7#
        • 2.Qg8#
      • 1...Qh6
        • 2.Qxh6#
      • 1...Qh4+!
    • 1.Rh2?
      • 1...Qxg6+
        • 2.Sxg6#
      • 1...Qxf7+
        • 2.Qxf7#
      • 1...Qg7+
        • 2.Qxg7#
      • 1...Qxh8+
        • 2.Rxh8#
      • 1...Qxh2
        • 2.Qg7#
        • 2.Qg8#
      • 1...Qg8
        • 2.Qxg8#
      • 1...Qh3
        • 2.Qg7#
        • 2.Qg8#
      • 1...Qh5
        • 2.Qg7#
        • 2.Qg8#
      • 1...Qh6
        • 2.Qxh6#
      • 1...Qh4+!
    • 1.Rh3?
      • 1...Qxg6+
        • 2.Sxg6#
      • 1...Qxf7+
        • 2.Qxf7#
      • 1...Qg7+
        • 2.Qxg7#
      • 1...Qxh8+
        • 2.Rxh8#
      • 1...Qxh3
        • 2.Qg7#
        • 2.Qg8#
      • 1...Qg8
        • 2.Qxg8#
      • 1...Qh5
        • 2.Qg7#
        • 2.Qg8#
      • 1...Qh6
        • 2.Qxh6#
      • 1...Qh4+!
    • 1.Rh4?
      • 1...Qxg6+
        • 2.Sxg6#
      • 1...Qxf7+
        • 2.Qxf7#
      • 1...Qg7+
        • 2.Qxg7#
      • 1...Qxh8+
        • 2.Rxh8#
      • 1...Qg8
        • 2.Qxg8#
      • 1...Qh5
        • 2.Qg7#
        • 2.Qg8#
      • 1...Qh6
        • 2.Qxh6#
      • 1...Qxh4+!
    • 1.Rg5?
      • 1...Qxg6+
        • 2.Sxg6#
      • 1...Qxf7+
        • 2.Qxf7#
      • 1...Qg7+
        • 2.Qxg7#
      • 1...Qg8
        • 2.Qxg8#
      • 1...Qh1
        • 2.Qg7#
        • 2.Qg8#
      • 1...Qh2
        • 2.Qg7#
        • 2.Qg8#
      • 1...Qh3
        • 2.Qg7#
        • 2.Qg8#
      • 1...Qh4
        • 2.Qg7#
        • 2.Qg8#
      • 1...Qh5
        • 2.Qg7#
        • 2.Qg8#
      • 1...Qh6
        • 2.Qxh6#
      • 1...Qxh8+!
    • 1.Qh6+?
      • 1...Qg7+
        • 2.Qxg7#
      • 1...Qxh6+!
  • Keys
    • 1.Rh6!
      • 1...Qxg6+
        • 2.Sxg6#
      • 1...Qxf7+
        • 2.Qxf7#
      • 1...Qg7+
        • 2.Qxg7#
      • 1...Qxh8+
        • 2.Rxh8#
      • 1...Qxh6
        • 2.Qxh6#
      • 1...Qg8
        • 2.Qxg8#

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • Q(a);CHECK,XQ(C)::S(E),XQ(a)
    • Q(a);N_GUARD::QAR1(C),XQ(a)
    • Q(a);N_GUARD,P_PINQ(C)::QAB(C),XQ(a)
    • Q(a);CHECK,OGATE,XB(D)::QAR1(C),XQ(a)
    • Q(a);CHECK,N_GUARD::QAB1(C),XQ(a)
    • Q(a);CHECK,OGATE,XS(E)::R(A),XQ(a)
  • Tries
    • Try
      • R(A);
      • Vars
        • Q(a);CHECK,XQ(C)::S(E),XQ(a)
        • Q(a);CHECK,OGATE,XB(D)::QAR1(C),XQ(a)
        • Q(a);CHECK,N_GUARD::QAB1(C),XQ(a)
        • Q(a);CHECK,OGATE,XS(E)::R(A),XQ(a)
        • Q(a);N_GUARD::QAR1(C),XQ(a)
        • Q(a);N_GUARD,P_PINQ(C)::QAB(C),XQ(a)
      • Refutation
        • Q(a);CHECK
    • Try
      • R(A);
      • Vars
        • Q(a);CHECK,XQ(C)::S(E),XQ(a)
        • Q(a);CHECK,OGATE,XB(D)::QAR1(C),XQ(a)
        • Q(a);CHECK,N_GUARD::QAB1(C),XQ(a)
        • Q(a);CHECK,OGATE,XS(E)::R(A),XQ(a)
        • Q(a);N_GUARD::QAR1(C),XQ(a)
        • Q(a);N_GUARD,P_PINQ(C)::QAB(C),XQ(a)
      • Refutation
        • Q(a);CHECK
    • Try
      • R(A);
      • Vars
        • Q(a);CHECK,XQ(C)::S(E),XQ(a)
        • Q(a);CHECK,OGATE,XB(D)::QAR1(C),XQ(a)
        • Q(a);CHECK,N_GUARD::QAB1(C),XQ(a)
        • Q(a);CHECK,OGATE,XS(E)::R(A),XQ(a)
        • Q(a);N_GUARD::QAR1(C),XQ(a)
        • Q(a);N_GUARD,P_PINQ(C)::QAB(C),XQ(a)
      • Refutation
        • Q(a);CHECK
    • Try
      • R(A);
      • Vars
        • Q(a);CHECK,XQ(C)::S(E),XQ(a)
        • Q(a);CHECK,OGATE,XB(D)::QAR1(C),XQ(a)
        • Q(a);CHECK,N_GUARD::QAB1(C),XQ(a)
        • Q(a);CHECK,OGATE,XS(E)::R(A),XQ(a)
        • Q(a);N_GUARD::QAR1(C),XQ(a)
        • Q(a);N_GUARD,P_PINQ(C)::QAB(C),XQ(a)
      • Refutation
        • Q(a);CHECK,XR(A)
    • Try
      • R(A);
      • Vars
        • Q(a);CHECK,XQ(C)::S(E),XQ(a)
        • Q(a);CHECK,OGATE,XB(D)::QAR1(C),XQ(a)
        • Q(a);CHECK,N_GUARD::QAB1(C),XQ(a)
        • Q(a);N_GUARD::QAR1(C),XQ(a)
        • Q(a);N_GUARD,P_PINQ(C)::QAB(C),XQ(a)
      • Refutation
        • Q(a);CHECK,XS(E)
    • Try
      • Q(C);CHECK
      • Vars
        • Q(a);CHECK,N_GUARD,P_SPINQ(a)::QAB1(C),XQ(a)
      • Refutation
        • Q(a);CHECK,XQ(C)
  • Actual
    • R(A);
    • Vars
      • Q(a);CHECK,XQ(C)::S(E),XQ(a)
      • Q(a);CHECK,OGATE,XB(D)::QAR1(C),XQ(a)
      • Q(a);CHECK,N_GUARD::QAB1(C),XQ(a)
      • Q(a);CHECK,OGATE,XS(E)::R(A),XQ(a)
      • Q(a);OGATE,P_PINQ(C),XR(A)::QAB(C),XQ(a)
      • Q(a);N_GUARD::QAR1(C),XQ(a)
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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).