MESON Chess Problem Database

Problem Display
PID: 139358 (4b3/2B1p3/PpkPQ3/1p3p1r/1b1P4/2N1P3/p2K2Nq/r1R4B w - - 0 1)

Lies, Heinz

5th HM., BCPS 031. Ty., 1937

4b3/2B1p3/PpkPQ3/1p3p1r/1b1P4/2N1P3/p2K2Nq/r1R4B

#2

11 + 11

56 The Problemist 1937

SOLUTION

  • SOUND
  • Sets
    • 1...Qxg2+
      • 2.Bxg2#
    • 1...Qh4
      • 2.Sxh4#
    • 1...Bxc3+
      • 2.Rxc3#
    • 1...Bc5
      • 2.d5#
    • 1...Bxd6
      • 2.Sb1#
    • 1...Bd7
      • 2.Qd5#
  • Keys
    • 1.Bb8!
      • threat
        • 2.Qc8#
      • 1...Qxg2+
        • 2.Bxg2#
      • 1...Bxc3+
        • 2.Rxc3#
      • 1...Qxd6
        • 2.Sh4#
      • 1...Bxd6
        • 2.Sb1#
      • 1...Bd7
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • Q(c);CHECK,OGATE,P_PINS(E),P_SPINQ(c),XS(D)::B(B),XQ(c)
    • Q(c);N_PINS(D),P_PINS(E)::B(B)+S(D),XQ(c)
    • B(d);CHECK,OGATE,P_SPINB(d),XS(E)::R(A),XB(d)
    • B(d);SBLOCK::P(G)
    • B(d);P_SPINB(d),XP(I)::R(A)+S(E)
    • B(k);SBLOCK::QAB1(J)
  • Actual
    • B(K);
    • Threat
      • QAR2(J)
    • Vars
      • Q(c);CHECK,OGATE,P_PINS(E),P_SPINQ(c),XS(D)::B(B),XQ(c)
      • B(d);CHECK,OGATE,P_SPINB(d),XS(E)::R(A),XB(d)
      • Q(c);N_PINS(D),P_PINP(G),P_PINS(E),P_SPINQ(c),XP(I)::B(B)+S(D)
      • B(d);P_SPINB(d),XP(I)::R(A)+S(E)
      • B(k);SBLOCK::QAB1(J)
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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).