MESON Chess Problem Database

Problem Display
PID: 81678 (KB6/n7/2k5/8/N6p/3QRbpq/8/2r5 w - - 0 1)

Macleod, Norman Alasdair

Shire, David J

The Problemist, 1990

KB6/n7/2k5/8/N6p/3QRbpq/8/2r5

#2

5 + 7

6455 The Chessboard Adventures of Norman Macleod 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Qf1
      • 2.Re6#
    • 1...Qg2
      • 2.Re6#
    • 1...Qe6
      • 2.Rxe6#
    • 1...Qh1
      • 2.Re6#
    • 1...Qh2
      • 2.Re6#
  • Tries
    • 1.Re7?
      • threat
        • 2.Rc7#
      • 1...Rc4
        • 2.Qxc4#
      • 1...Qd7
        • 2.Qxd7#
      • 1...Bd5
        • 2.Qa6#
      • 1...Sb5
        • 2.Qxf3#
      • 1...Qc8!
  • Keys
    • 1.Re5!
      • threat
        • 2.Qd6#
      • 1...Bd5
        • 2.Qxd5#
      • 1...Qe6
        • 2.Rxe6#
      • 1...Qd7
        • 2.Qa6#
      • 1...Rd1
        • 2.Rc5#
      • 1...Rc5
        • 2.Rxc5#
      • 1...Sb5
        • 2.Qxb5#
      • 1...Sc8
        • 2.Qb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 4
  • Sets
    • Q(d);N_GUARD::R(B)
    • Q(d);N_GUARD::R(B),XQ(d)
  • Tries
    • Try
      • R(B);
      • Threat
        • R1(B)
      • Vars
        • R(a);N_GUARD::QAR2(A),XR(a)
        • Q(d);N_GUARD::QAB1(A),XQ(d)
        • B(b);SBLOCK::QAR2(A)
        • S(g);SBLOCK::QAB(A),XB(b)
      • Refutation
        • Q(d);P_PINB(E)
  • Actual
    • R(B);
    • Threat
      • QAR1(A)
    • Vars
      • B(b);N_GUARD::QAB1(A),XB(b)
      • Q(d);N_GUARD::R(B),XQ(d)
      • Q(d);SBLOCK::QAR2(A)
      • R(a);N_GUARD::R1(B)
      • R(a);N_GUARD::R1(B),XR(a)
      • S(g);N_GUARD::QAB1(A),XS(g)
      • S(g);N_GUARD::QAB1(A)
HTML5 logo

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).