MESON Chess Problem Database

Problem Display
PID: 23444 (5bK1/1p1Bp3/4N3/1R2pPQN/R1b1k3/2Prn1p1/2p1P1r1/2q5 w - - 0 1)

Smedley, Don A

1st Prize, McWilliam Ty., 1954

5bK1/1p1Bp3/4N3/1R2pPQN/R1b1k3/2Prn1p1/2p1P1r1/2q5

#2

10 + 12

3770 BCSC Postal 2008-2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rf2
      • 2.Sxg3#
    • 1...Rh2
      • 2.Sxg3#
    • 1...Sd5
      • 2.Sc5#
  • Tries
    • 1.Bc6+?
      • 1...Rd5
        • 2.Sc5#
      • 1...Sd5
        • 2.Sc5#
      • 1...bxc6!
  • Keys
    • 1.Qxg3!
      • threat
        • 2.Rxe5#
      • 1...Rxg3+
        • 2.Sxg3#
      • 1...Kxf5
        • 2.Rxe5#
      • 1...Rd5
        • 2.Sg5#
      • 1...Bg7
        • 2.Qf3#
      • 1...Sg4
        • 2.Qxd3#
      • 1...Sd5
        • 2.Sc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • R(c);N_GUARD::S(G),XP(f)
    • S(e);N_PINS(H),SBLOCK::S(H)
  • Tries
    • Try
      • B(I);CHECK
      • Vars
        • R(d);N_PINS(H),P_SPINR(d)::S(H)
        • S(e);N_PINS(H),P_SPINS(e)::S(H)
      • Refutation
        • P(j);XB(I)
  • Actual
    • Q(F);P_SPINQ(F),XP(f)
    • Threat
      • R1(D),XP(i)
    • Vars
      • R(c);CHECK,XQ(F)::S(G),XR(c)
      • K(h);N_SPINB(g),P_SPINP(i),S_FLIGHT,XP(E)::R1(D),XP(i)
      • R(d);N_PINS(H)::S(H)
      • B(l);N_PINQ(F)::QAB1(F)
      • S(e);N_PINQ(F)::QAB1(F),XR(d)
      • S(e);N_PINS(H),SBLOCK::S(H)
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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).