MESON Chess Problem Database

Problem Display
PID: 120945 (8/8/1R6/B2n4/kP5K/8/1Q6/2n5 w - - 0 1)

Sobek, Karel

Slovacko, 1966

8/8/1R6/B2n4/kP5K/8/1Q6/2n5

#2

5 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sa2
      • 2.Qxa2#
    • 1...Se2
      • 2.Qa2#
    • 1...Sb3
      • 2.Qa2#
    • 1...Sd3
      • 2.Qa2#
    • 1...Sxb4
      • 2.Qxb4#
  • Tries
    • 1.Qa1+?
      • 1...Sa2
        • 2.Qxa2#
      • 1...Kb3!
    • 1.Qc2+?
      • 1...Sb3
        • 2.Qa2#
      • 1...Ka3!
  • Keys
    • 1.b5!
      • 1...Kxa5
        • 2.Ra6#
      • 1...Sxb6
        • 2.Qb4#
      • 1...Sa2
        • 2.Qxa2#
      • 1...Se2
        • 2.Qa2#
      • 1...Sb3
        • 2.Qa2#
      • 1...Sd3
        • 2.Qa2#
      • 1...Sc3
        • 2.Qb4#
      • 1...Se3
        • 2.Qb4#
      • 1...Sb4
        • 2.Qxb4#
      • 1...Sf4
        • 2.Qb4#
      • 1...Sf6
        • 2.Qb4#
      • 1...Sc7
        • 2.Qb4#
      • 1...Se7
        • 2.Qb4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAR2(A),XS(a)
    • S(a);N_GUARD::QAR2(A)
    • S(c);OGATE,XP(B)::QAR1(A),XS(c)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAR2(A),XS(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAR2(A)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • P(B);
    • Vars
      • K(b);OGATEB,P-FLIGHT,XB(D)::R1(E)
      • S(c);N_GUARD,XR(E)::QAR1(A)
      • S(a);N_GUARD::QAR2(A),XS(a)
      • S(a);N_GUARD::QAR2(A)
      • S(c);N_GUARD::QAR1(A)
      • S(c);N_GUARD::QAR1(A),XS(c)
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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).