MESON Chess Problem Database

Problem Display
PID: 42832 (KQ3B2/8/p1N5/8/3N4/q4R1r/kP1R2b1/rn6 w - - 0 1)

Macleod, Norman Alasdair

British Chess Magazine, 1962

KQ3B2/8/p1N5/8/3N4/q4R1r/kP1R2b1/rn6

#2

8 + 7

6455 The Chessboard Adventures of Norman Macleod 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb2
      • 2.Sb4#
      • 2.Rxb2#
      • 2.Qxb2#
      • 2.Qb3#
    • 1...Qb4
      • 2.Sxb4#
    • 1...Qc5
      • 2.Qb3#
    • 1...Qd6
      • 2.Qb3#
    • 1...Qe7
      • 2.Qb3#
    • 1...Qb3
      • 2.Qxb3#
    • 1...Qd3
      • 2.Sb4#
    • 1...Qe3
      • 2.Sb4#
    • 1...Qa5
      • 2.Qb3#
    • 1...Sc3
      • 2.bxa3#
  • Tries
    • 1.Rxa3+?
      • 1...Sxa3
        • 2.bxa3#
      • 1...Rxa3!
  • Keys
    • 1.Rc2!
      • threat
        • 2.bxa3#
      • 1...Qxb2
        • 2.Sb4#
        • 2.Rxb2#
        • 2.Qxb2#
        • 2.Qb3#
      • 1...Qxf8
        • 2.b4#
      • 1...Qxf3
        • 2.b3#
      • 1...Qb4
        • 2.Sxb4#
      • 1...Qc5
        • 2.Qb3#
      • 1...Qd6
        • 2.Qb3#
        • 2.b4#
      • 1...Qe7
        • 2.Qb3#
        • 2.b4#
      • 1...Qb3
        • 2.Qxb3#
      • 1...Qc3
        • 2.bxc3#
      • 1...Qd3
        • 2.Sb4#
      • 1...Qe3
        • 2.Sb4#
        • 2.b3#
      • 1...Qa4
        • 2.b3#
      • 1...Qa5
        • 2.Qb3#
        • 2.b3#
        • 2.b4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • Q(e);N_GUARD::S(E),XQ(e)
    • Q(e);N_GUARD::QAB1(G)
    • Q(e);N_GUARD::QAB1(G),XQ(e)
    • Q(e);N_GUARD::S(E)
    • S(b);N_GUARD::R(B)+P(A),XQ(e)
  • Tries
    • Try
      • R(C);CHECK,P_SPINS(E),XQ(e)
      • Vars
        • S(b);OGATE,XR(C)::R(B)+P(A),XS(b)
      • Refutation
        • R(f);XR(C)
  • Actual
    • R(B);
    • Threat
      • R(B)+P(A),XQ(e)
    • Vars
      • Q(e);N_GUARD,P_PINQ(G),XB(H)::R(B)+P(A)
      • Q(e);N_GUARD,P_PINS(E),XR(C)::R(B)+P(A)
      • Q(e);N_GUARD::S(E),XQ(e)
      • Q(e);N_GUARD::QAB1(G)
      • Q(e);N_GUARD::QAB1(G),XQ(e)
      • Q(e);OGATE::R(B)+P(A),XQ(e)
      • Q(e);N_GUARD::S(E)
      • Q(e);N_GUARD::R(B)+P(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).