MESON Chess Problem Database

Problem Display
PID: 72802 (r3k2r/1R2b3/2P3PP/8/4R1K1/8/8/2Q5 w qk - 0 1)

Lindemann, Gerhard

Tijdschrift vd KNSB, 1936

r3k2r/1R2b3/2P3PP/8/4R1K1/8/8/2Q5

#2

7 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Rb8#
    • 1...Ra2
      • 2.Rb8#
    • 1...Ra3
      • 2.Rb8#
    • 1...Ra4
      • 2.Rb8#
    • 1...Ra5
      • 2.Rb8#
    • 1...Ra6
      • 2.Rb8#
    • 1...Ra7
      • 2.Rb8#
    • 1...Rb8
      • 2.Rxb8#
  • Keys
    • 1.Qa1!
      • threat
        • 2.Qxh8#
        • 2.Qxa8#
      • 1...Kd8
        • 2.Qxa8#
      • 1...Kf8
        • 2.Qxh8#
      • 1...0-0
        • 2.Qg7#
        • 2.h7#
      • 1...0-0-0
        • 2.Qa8#
      • 1...Rxa1
        • 2.Rb8#
      • 1...Rxh6
        • 2.Qxa8#
      • 1...Ra2
        • 2.Rb8#
        • 2.Qxh8#
      • 1...Ra3
        • 2.Rb8#
        • 2.Qxh8#
      • 1...Ra4
        • 2.Rb8#
        • 2.Qxh8#
      • 1...Ra5
        • 2.Rb8#
        • 2.Qxh8#
      • 1...Ra6
        • 2.Rb8#
        • 2.Qxh8#
      • 1...Ra7
        • 2.Rb8#
        • 2.Qxh8#
      • 1...Rb8
        • 2.Rxb8#
        • 2.Qxh8#
      • 1...Rc8
        • 2.Qxh8#
      • 1...Rd8
        • 2.Qxh8#
      • 1...Rh7
        • 2.Qxa8#
      • 1...Rf8
        • 2.Qxa8#
      • 1...Rg8
        • 2.Qxa8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 7
  • Sets
    • R(b);N_GUARD::R(G)
    • R(b);N_GUARD,P_PINR(B)::R(G)
    • R(b);N_GUARD::R(G),XR(b)
  • Actual
    • Q(A);
    • Threat
      • DUALS(2)
    • Vars
      • K(c);N_SPINB(a),P-FLIGHT::QAR(A),XR(b)
      • K(c);N_SPINB(a),P-FLIGHT::QAR2(A),XR(d)
      • K(c);0-0-0,N_SPINB(a)::QAR2(A)
      • R(b);N_GUARD,XQ(A)::R(G)
      • R(d);XP(F)::QAR(A),XR(b)
      • R(b);::QAR(A),XR(d)
      • R(b);SBLOCK::QAR(A),XR(d)
      • R(d);::QAR(A),XR(b)
      • R(d);SBLOCK::QAR(A),XR(b)
      • R(d);P_PINP(E)::QAR(A),XR(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).