MESON Chess Problem Database

Problem Display
PID: 6666 (k7/3N4/KP2r3/Q7/3n4/8/8/8 w - - 0 1)

Mott-Smith, Geoffrey

New York Sun, 1932

k7/3N4/KP2r3/Q7/3n4/8/8/8

#2

4 + 3

5064 100 Years of the American Two-move Chess Problem 1962
2012 Miniature Chess Problems from Many Countries 1981
3295 Einfuhrung in die Welt des Schachproblem 1984

SOLUTION

  • SOUND
  • Sets
    • 1...Re1
      • 2.b7#
    • 1...Re2
      • 2.b7#
    • 1...Re3
      • 2.b7#
    • 1...Re4
      • 2.b7#
    • 1...Re5
      • 2.b7#
    • 1...Rxb6+
      • 2.Kxb6#
    • 1...Re7
      • 2.b7#
    • 1...Re8
      • 2.b7#
    • 1...Sc6
      • 2.b7#
  • Tries
    • 1.Qd5+?
      • 1...Sc6
        • 2.b7#
      • 1...Rc6!
  • Keys
    • 1.Qe5!
      • threat
        • 2.Qb8#
      • 1...Rxb6+
        • 2.Sxb6#
      • 1...Rxe5
        • 2.b7#
      • 1...Rd6
        • 2.Qh8#
        • 2.Qe8#
      • 1...Re8
        • 2.Qxe8#
        • 2.b7#
      • 1...Sc6
        • 2.b7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 6
  • Sets
    • R(b);N_PINP(C)::P(C)
    • R(b);CHECK,XP(C)::QAR(A)+K(B),XR(b)
    • S(a);N_PINP(C)::P(C)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • S(a);N_PINP(C),P_SPINS(a)::P(C)
      • Refutation
        • R(b);P_SPINR(b)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • R(b);CHECK,XP(C)::S(D),XR(b)
      • R(b);N_PINP(C),XQ(A)::P(C)
      • S(a);N_PINP(C)::P(C)
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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).