MESON Chess Problem Database

Problem Display
PID: 63695 (1q4bB/6R1/1pQ5/p1b2B2/P1n5/2k3N1/PnN1RP1K/8 w - - 0 1)

Ellison, Wallace D

Chess, 1946

1q4bB/6R1/1pQ5/p1b2B2/P1n5/2k3N1/PnN1RP1K/8

#2

11 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qxg3+
      • 2.Rxg3#
    • 1...Ba3
      • 2.Rc7#
    • 1...Bb4
      • 2.Rc7#
    • 1...Sd6
      • 2.Rg4#
  • Tries
    • 1.Rc7+?
      • 1...Bd4
        • 2.Bxd4#
      • 1...Se5!
  • Keys
    • 1.Qb5!
      • threat
        • 2.Qb3#
      • 1...Qxg3+
        • 2.Rxg3#
      • 1...Se5
        • 2.Se4#
      • 1...Bb4
        • 2.Rc7#
      • 1...Sd2
        • 2.Rc7#
      • 1...Sa3
        • 2.Rc7#
      • 1...Se3
        • 2.Rc7#
      • 1...Sd6
        • 2.Rc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • Q(g);CHECK,OGATE,XS(F)::B(K)+R(J),DCHECK,XQ(g)
    • B(e);N_GUARD,P_SPINS(c)::B(K)+R(J)
    • S(c);N_GUARD,N_PINS(F),P_SPINB(e),S_CUTQ(g)::B(K)+R(J)
  • Tries
    • Try
      • R(J);CHECK,N_SPINS(F)
      • Vars
        • B(e);N_GUARD,P_SPINB(e),P_SPINS(c)::B(K),XB(e)
      • Refutation
        • S(c);P_SPINB(e),P_SPINS(c)
  • Actual
    • Q(I);
    • Threat
      • QAR1(I)
    • Vars
      • Q(g);CHECK,OGATE,XS(F)::B(K)+R(J),DCHECK,XQ(g)
      • S(c);N_PINS(F)::S(F)
      • B(e);N_GUARD,S_CUTS(c)::B(K)+R(J)
      • S(c);N_GUARD,S_CUTB(e)::B(K)+R(J)
      • S(c);N_GUARD,N_PINS(F),S_CUTB(e)::B(K)+R(J)
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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).