MESON Chess Problem Database

Problem Display
PID: 229655 (K5R1/2Q2B1p/3P3k/8/5p2/8/R2p3p/8 w - - 0 1)

Grimshaw, Arthur E

Tidskrift for Schack, 1911

K5R1/2Q2B1p/3P3k/8/5p2/8/R2p3p/8

#2

6 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...d1S
      • 2.Rxh2#
    • 1...d1R
      • 2.Rxh2#
  • Tries
    • 1.Qc6?
      • threat
        • 2.d7#
      • 1...d1R
        • 2.Rxh2#
      • 1...h1Q
        • 2.Qxh1#
      • 1...h1B
        • 2.Qxh1#
      • 1...d1Q!
  • Keys
    • 1.Qc1!
      • 1...h1Q+
        • 2.Qxh1#
      • 1...h1B+
        • 2.Qxh1#
      • 1...dxc1Q
        • 2.Rxh2#
      • 1...dxc1S
        • 2.Rxh2#
      • 1...dxc1B
        • 2.Rxh2#
      • 1...dxc1R
        • 2.Rxh2#
      • 1...d1Q
        • 2.Qxf4#
      • 1...d1S
        • 2.Rxh2#
        • 2.Qxf4#
      • 1...d1B
        • 2.Qxf4#
      • 1...d1R
        • 2.Rxh2#
        • 2.Qxf4#
      • 1...h1S
        • 2.Qxh1#
      • 1...h1R
        • 2.Qxh1#
      • 1...f3
        • 2.Qxd2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 2
  • Sets
    • P(a);OGATE::R(A),XP(b)
  • Tries
    • Try
      • Q(C);
      • Threat
        • QAR(C)+P(B)
      • Vars
        • P(a);OGATE::R(A),XP(b)
        • P(b);OGATEB,P_PINQ(C)::QAR(C),XQ(b)
        • P(b);OGATEB,P_PINQ(C)::QAR(C),XB(b)
      • Refutation
        • P(a);
  • Actual
    • Q(C);
    • Vars
      • P(b);CHECK,OGATEB::QAR(C),XQ(b)
      • P(b);CHECK,OGATEB::QAR(C),XB(b)
      • P(a);OGATE,XQ(C)::R(A),XP(b)
      • P(a);OGATE,P_SPINP(c)::QAB(C),XP(c)
      • P(b);OGATEB::QAR(C),XS(b)
      • P(b);OGATEB::QAR(C),XR(b)
      • P(c);OGATEB,P_SPINP(a)::QAB(C),XP(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).