MESON Chess Problem Database

Problem Display
PID: 258981 (B2bN3/1rP4K/2k1P3/R1B1n2p/1P1pRN2/1r3Q2/2b3p1/4n1q1 w - - 0 1)

ten Cate, Pieter

Die Schwalbe, 1967

B2bN3/1rP4K/2k1P3/R1B1n2p/1P1pRN2/1r3Q2/2b3p1/4n1q1

#2

11 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Bxe4+
      • 2.Qxe4#
    • 1...Be7
      • 2.c8Q#
      • 2.c8R#
    • 1...S1d3
      • 2.Rxe5#
    • 1...S5d3
      • 2.Rxe1#
    • 1...Sd7
      • 2.cxd8S#
  • Keys
    • 1.Ba7!
      • threat
        • 2.Rc5#
      • 1...Bxe4+
        • 2.Qxe4#
      • 1...Rc3
        • 2.b5#
      • 1...Be7
        • 2.c8Q#
        • 2.c8R#
      • 1...S1d3
        • 2.Rexe5#
      • 1...S5d3
        • 2.Rxe1#
      • 1...Sd7
        • 2.cxd8S#
      • 1...d3
        • 2.Rc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(c);CHECK,OGATE,P_SPINB(c),XR(C)::QAB(A),XB(c)
    • B(k);N_PINP(H)::P=Q
    • S(a);N_PINR(C)::QAB(A)+R(C),XS(g)
    • S(g);N_PINR(C)::QAB(A)+R(C),XS(a)
    • S(g);N_PINP(H)::PXB(k)=S
  • Actual
    • B(F);
    • Threat
      • R1(E)
    • Vars
      • B(c);CHECK,OGATE,P_SPINB(c),XR(C)::QAB(A),XB(c)
      • R(e);N_GUARD::P(B)
      • B(k);N_PINP(H)::P=Q
      • S(a);N_PINR(C)::QAB(A)+R(C),XS(g)
      • S(g);N_PINR(C)::QAB(A)+R(C),XS(a)
      • S(g);N_PINP(H)::PXB(k)=S
      • P(f);N_PINR(C)::QAB(A)+R(C),DCHECK
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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).