MESON Chess Problem Database

Problem Display
PID: 56641 (4BnK1/3p1Rpp/1Rqb3k/5P2/6P1/4N2N/8/2B4Q w - - 0 1)

Meyer, GJ

2nd HM., Ajec, 1941

4BnK1/3p1Rpp/1Rqb3k/5P2/6P1/4N2N/8/2B4Q

#2

10 + 7

3530 Het Half Pin Thema (II) 0000

SOLUTION

  • SOUND
  • Tries
    • 1.Sc2+?
      • 1...g5
        • 2.Bxg5#
      • 1...Bf4!
    • 1.Sc4+?
      • 1...g5
        • 2.Bxg5#
      • 1...Bf4!
  • Keys
    • 1.Rxg7!
      • threat
        • 2.g5#
      • 1...Qd5+
        • 2.Sxd5#
      • 1...Qc4+
        • 2.Sxc4#
      • 1...Bf4
        • 2.Sxf4#
      • 1...Qg2
        • 2.Sxg2#
      • 1...Be7
        • 2.Sg5#
      • 1...Se6
        • 2.Rxh7#
      • 1...Sg6
        • 2.Rxh7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • P(e);P_SPINP(e)::B(A),XP(e)
      • Refutation
        • B(b);P_SPINB(b),P_SPINQ(a)
    • Try
      • S(C);CHECK
      • Vars
        • P(e);P_SPINP(e)::B(A),XP(e)
      • Refutation
        • B(b);P_SPINB(b),P_SPINQ(a)
  • Actual
    • R(H);XP(e)
    • Threat
      • P(E)
    • Vars
      • Q(a);CHECK,N_GUARD,P_SPINB(b)::B(A)+S(C),XQ(a)
      • Q(a);CHECK,P_SPINB(b)::B(A)+S(C),XQ(a)
      • B(b);P_SPINQ(a)::QAR(B)+S(D),XB(b)
      • Q(a);N_GUARD,P_SPINB(b)::B(A)+S(C),XQ(a)
      • B(b);N_GUARD,P_SPINQ(a)::QAR(B)+S(D)
      • S(g);N_GUARD::R1(H),XP(f)
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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).