MESON Chess Problem Database

Problem Display
PID: 166367 (8/8/8/8/5pR1/2K2Q2/5p2/4k3 w - - 0 1)

Chernyavsky, Mykola Vasilovich

Best Problems, 2017

8/8/8/8/5pR1/2K2Q2/5p2/4k3

#2

3 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Kf1
      • 2.Qd1#
  • Tries
    • 1.Qxf2+?
      • 1...Kd1
        • 2.Rg1#
        • 2.Qf1#
        • 2.Qd2#
      • 1...Kxf2!
    • 1.Qd3?
      • 1...f1Q
        • 2.Qd2#
      • 1...f1B
        • 2.Qd2#
      • 1...f1R
        • 2.Qd2#
      • 1...f3
        • 2.Re4#
      • 1...f1S!
  • Keys
    • 1.Rxf4!
      • 1...Kf1
        • 2.Qxf2#
      • 1...f1Q
        • 2.Qxf1#
      • 1...f1S
        • 2.Qxf1#
      • 1...f1B
        • 2.Qxf1#
      • 1...f1R
        • 2.Re4#
        • 2.Qxf1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT,P_SPINP(b)::QAR2(B)
  • Tries
    • Try
      • Q(B);CHECK,XP(b)
      • Refutation
        • K(a);S_FLIGHT,XQ(B)
    • Try
      • Q(B);
      • Vars
        • P(b);SBLOCK::QAB1(B)
        • P(c);OGATE::R(C)
      • Refutation
        • P(b);
  • Actual
    • R(C);XP(c)
    • Vars
      • K(a);P-FLIGHT,P_SPINP(b)::QAR1(B),XP(b)
      • P(b);OGATE::QAR1(B),XQ(b)
      • P(b);OGATE::QAR1(B),XS(b)
      • P(b);OGATE::QAR1(B),XB(b)
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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).