MESON Chess Problem Database

Problem Display
PID: 53467 (2B5/K1p5/8/8/R2N1kNB/R4P2/2P4n/3Q1nb1 w - - 0 1)

Roels, C

Source?, 1944

2B5/K1p5/8/8/R2N1kNB/R4P2/2P4n/3Q1nb1

#2

10 + 5

785 Het Belgisch Schaakbord (L'Echiquier Belge) 1949

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd4+
      • 2.Rxd4#
      • 2.Qxd4#
    • 1...Sxf3
      • 2.Qxf3#
    • 1...c5
      • 2.Se2#
  • Tries
    • 1.Qe1?
      • threat
        • 2.Qe4#
        • 2.Qe5#
      • 1...Bxd4+
        • 2.Rxd4#
      • 1...Sxf3
        • 2.Rxf3#
      • 1...Sxg4
        • 2.Qe4#
      • 1...Sd2
        • 2.Qg3#
        • 2.Qe5#
      • 1...Se3
        • 2.Qg3#
      • 1...Sg3
        • 2.Qxg3#
        • 2.Qe5#
      • 1...Be3!
    • 1.Qd3?
      • threat
        • 2.Qe4#
        • 2.Qf5#
      • 1...Bxd4+
        • 2.Rxd4#
        • 2.Qxd4#
      • 1...Sxf3
        • 2.Qf5#
        • 2.Qxf3#
      • 1...Sd2
        • 2.Qf5#
      • 1...Se3
        • 2.Qe4#
      • 1...Sg3!
  • Keys
    • 1.Ra5!
      • threat
        • 2.Rf5#
      • 1...Bxd4+
        • 2.Qxd4#
      • 1...Sxf3
        • 2.Qxf3#
      • 1...Se3
        • 2.Se6#
      • 1...Sg3
        • 2.Bg5#
      • 1...c5
        • 2.Se2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(c);OGATE,XP(D)::QAR1(A),XS(c)
    • P(e);N_PINS(F)::R(E)+S(F),DCHECK
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(b);CHECK,OGATE,P_SPINB(b),XS(F)::R(E),XB(b)
        • S(c);OGATE,XP(D)::R1(C),XS(c)
        • S(c);XS(G)::QAR1(A)
        • S(a);N_GUARD,N_PINS(F)::QAB1(A)
      • Refutation
        • B(b);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::QAR1(A)
        • S(a);N_PINS(F)::QAR1(A)
      • Refutation
        • S(a);
  • Actual
    • R(E);
    • Threat
      • R1(E)
    • Vars
      • B(b);CHECK,OGATE,XS(F)::QAR2(A),XB(b)
      • S(c);OGATE,XP(D)::QAR1(A),XS(c)
      • S(a);N_PINS(F)::S(F)
      • S(a);SBLOCK::B(H)
      • P(e);N_PINS(F)::S(F)
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).