MESON Chess Problem Database

Problem Display
PID: 71772 (6q1/2p5/n3pRBN/2p3k1/P4RNp/3p2pr/3K2bP/2B4n w - - 0 1)

Swindley, Cyril P

1st Prize, The Problemist, 1985

6q1/2p5/n3pRBN/2p3k1/P4RNp/3p2pr/3K2bP/2B4n

#2

9 + 12

721 Variantim 1988

SOLUTION

  • SOUND
  • Sets
    • 1...Qf7
      • 2.Sxf7#
    • 1...Qa8
      • 2.Sf7#
    • 1...Qb8
      • 2.Sf7#
    • 1...Qc8
      • 2.Sf7#
    • 1...Qd8
      • 2.Sf7#
    • 1...Qh8
      • 2.Sf7#
    • 1...e5
      • 2.R4f5#
  • Keys
    • 1.Kxd3!
      • threat
        • 2.Rf1#
        • 2.Rf2#
        • 2.Rf3#
        • 2.Rb4#
        • 2.Rc4#
        • 2.Rd4#
        • 2.Re4#
        • 2.R4f5#
      • 1...Qxg6+
        • 2.R4f5#
      • 1...Qd8+
        • 2.Rd4#
      • 1...Bf1+
        • 2.Rxf1#
      • 1...Be4+
        • 2.Rxe4#
      • 1...Sf2+
        • 2.Rxf2#
      • 1...Sb4+
        • 2.Rxb4#
      • 1...gxh2+
        • 2.Rf3#
      • 1...c4+
        • 2.Rxc4#
      • 1...Bf3
        • 2.Rxf3#
        • 2.Rb4#
        • 2.Rc4#
        • 2.Rd4#
        • 2.Re4#
        • 2.R4f5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 7
    • REMOVED MATES = 6
  • Sets
    • Q(l);N_GUARD::S(I),XQ(l)
    • Q(l);N_GUARD::S(I)
    • P(j);N_GUARD::R1(E)
  • Actual
    • K(B);P-FLIGHT,XP(c)
    • Threat
      • DUALS(8)
    • Vars
      • Q(l);CHECK,XB(H)::B(A)+R(E),DCHECK
      • Q(l);CHECK::B(A)+R(E)
      • B(b);CHECK::B(A)+R(E),XB(b)
      • S(a);CHECK::B(A)+R(E),XS(a)
      • S(i);CHECK::B(A)+R(E),XS(i)
      • P(d);CHECK,XP(C)::B(A)+R(E)
      • P(g);CHECK::B(A)+R(E),XP(g)
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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).