MESON Chess Problem Database

Problem Display
PID: 60661 (5Q2/6B1/3q4/Np1pN3/1p1k4/1K3P2/5P2/8 w - - 0 1)

McIntyre, Donald Glenoe

Natal Mercury, 1924

5Q2/6B1/3q4/Np1pN3/1p1k4/1K3P2/5P2/8

#2

7 + 5

5639 Some Problems For My Friends 1957

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Sd7#
    • 1...Qc5
      • 2.Qf4#
    • 1...Qb8
      • 2.Sac6#
      • 2.Qxb4#
    • 1...Qa6
      • 2.Qxb4#
    • 1...Qb6
      • 2.Qxb4#
    • 1...Qc6
      • 2.Saxc6#
    • 1...Qe6
      • 2.Qxb4#
    • 1...Qg6
      • 2.Qxb4#
    • 1...Qh6
      • 2.Qxb4#
    • 1...Qd7
      • 2.Qxb4#
    • 1...Qd8
      • 2.Sac6#
      • 2.Qxb4#
  • Tries
    • 1.Sec6+?
      • 1...Kc5
        • 2.Bd4#
      • 1...Kd3!
  • Keys
    • 1.Kc2!
      • threat
        • 2.Sb3#
      • 1...Qc5+
        • 2.Sec4#
      • 1...Qc7+
        • 2.Sec6#
      • 1...Qc6+
        • 2.Saxc6#
        • 2.Sexc6#
      • 1...Qg6+
        • 2.Sxg6#
      • 1...b3+
        • 2.Sxb3#
      • 1...Kc5
        • 2.Sd7#
      • 1...Qxe5
        • 2.Qxb4#
      • 1...Qf6
        • 2.Sec6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • K(b);P_SPINQ(e),S_FLIGHT::S(E)
    • Q(e);SBLOCK::QAR2(G)
    • Q(e);OGATE::QAR2(G),XP(a)
    • Q(e);N_GUARD::S(D),XQ(e)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(b);P_SPINQ(e),S_FLIGHT::B(F)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • K(B);S_FLIGHT
    • Threat
      • S(D)
    • Vars
      • Q(e);CHECK,N_GUARD::B(F)+S(E)
      • Q(e);CHECK::B(F)+S(E),DCHECK
      • Q(e);CHECK,N_GUARD::B(F)+S(E),XQ(e)
      • P(a);CHECK::S(D),XP(a)
      • K(b);P_SPINQ(e),S_FLIGHT::S(E)
      • Q(e);OGATE,P_SPINQ(e),XS(E)::QAR2(G),XP(a)
      • Q(e);::S(E)
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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).