MESON Chess Problem Database

Problem Display
PID: 42545 (2BKn2r/2pNp1p1/2P1kbP1/q1prnNP1/2Pp4/8/4R1Q1/8 w - - 0 1)

Casa, Alex

3rd Prize, BCF 122. Ty., 1969-1970

2BKn2r/2pNp1p1/2P1kbP1/q1prnNP1/2Pp4/8/4R1Q1/8

#2

10 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd7+
      • 2.Bxd7#
    • 1...Sd6+
      • 2.Sf8#
  • Tries
    • 1.Rxe5+?
      • 1...Rxe5
        • 2.Sxc5#
        • 2.Sb6#
        • 2.Sxf6#
        • 2.Sb8#
        • 2.Sf8#
      • 1...Bxe5!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Qxd5#
      • 1...Sxd6+
        • 2.Sf8#
      • 1...cxd6+
        • 2.Sb6#
      • 1...exd6+
        • 2.Sxf6#
      • 1...Kxd6
        • 2.Qxd5#
      • 1...Rxd6
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • R(d);CHECK,OGATE,P_SPINR(d),XS(H)::B(I),XR(d)
    • S(k);CHECK,N_PINS(H)::B(I)+S(H),DCHECK
  • Tries
    • Try
      • R(A);CHECK,XS(e)
      • Refutation
        • B(g);XR(A)
  • Actual
    • S(D);N_SPINS(H)
    • Threat
      • QAB1(B),XR(d)
    • Vars
      • S(k);CHECK,SBLOCK,XS(D)::B(I)+S(H),DCHECK
      • P(h);CHECK,SBLOCK,XS(D)::B(I)+S(H)
      • P(i);CHECK,SBLOCK,XS(D)::B(I)+S(H),XB(g)
      • K(f);N_SPINS(e),P-FLIGHT,XS(D)::QAR1(B),XR(d)
      • R(d);P_PINS(H),SBLOCK,XS(D)::QAB(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).