MESON Chess Problem Database

Problem Display
PID: 140171 (8/K7/8/1kp5/RP2B3/8/6Q1/8 w - - 0 1)

Mihalek, Frederick M

Probleemblad, 1975

8/K7/8/1kp5/RP2B3/8/6Q1/8

#2

5 + 2

5454 Near Snap 2011

SOLUTION

  • SOUND
  • Sets
    • 1...c4
      • 2.Bc6#
  • Tries
    • 1.Bc2?
      • 1...cxb4
        • 2.Qd5#
      • 1...c4
        • 2.Qd5#
        • 2.Qb7#
      • 1...Kc4!
    • 1.Qa2?
      • 1...cxb4
        • 2.Ra5#
      • 1...c4!
    • 1.Qc2?
      • 1...cxb4
        • 2.Bd3#
        • 2.Bc6#
        • 2.Qc6#
      • 1...c4!
    • 1.Qd2?
      • 1...Kc4
        • 2.Qd3#
      • 1...cxb4
        • 2.Qxb4#
      • 1...c4
        • 2.Ra5#
        • 2.Qd7#
      • 1...Kxa4!
  • Keys
    • 1.Qb2!
      • 1...Kxa4
        • 2.Bc6#
      • 1...Kc4
        • 2.b5#
      • 1...cxb4
        • 2.Qxb4#
      • 1...c4
        • 2.Ra5#

Anticipated by 223370(1885), 46964(1958)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(b);SBLOCK::B(D)
  • Tries
    • Try
      • B(D);
      • Vars
        • P(b);OGATEB,XP(C)::QAR2(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • P(b);SBLOCK,XP(C)::R1(B)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
        • P(b);OGATE,XP(C)::QAR1(A),XP(b)
      • Refutation
        • K(a);S_FLIGHT,XR(B)
  • Actual
    • Q(A);
    • Vars
      • K(a);S_FLIGHT,XR(B)::B(D)
      • K(a);OGATE,S_FLIGHT::R(B)+P(C)
      • P(b);OGATE,P_SPINP(b),XP(C)::QAR1(A),XP(b)
      • P(b);SBLOCK::R1(B)
HTML5 logo

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).