MESON Chess Problem Database

Problem Display
PID: 52887 (b5R1/8/4Q3/3n1p2/5k2/r7/p1N3Pp/rn2B2K w - - 0 1)

Roels, C

Het Belgisch Schaakbord (L'Echiquier Belge), 1949

b5R1/8/4Q3/3n1p2/5k2/r7/p1N3Pp/rn2B2K

#2

6 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rg3
      • 2.Bxg3#
    • 1...Ra4
      • 2.Bg3#
    • 1...Ra5
      • 2.Bg3#
    • 1...Ra6
      • 2.Bg3#
    • 1...Ra7
      • 2.Bg3#
    • 1...Sc3
      • 2.Bg3#
      • 2.Qe3#
    • 1...Se3
      • 2.Bg3#
  • Tries
    • 1.g3+?
      • 1...Kf3
        • 2.Sd4#
      • 1...Rxg3!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Se2#
      • 1...Re3
        • 2.Qxf5#
      • 1...Sbc3
        • 2.g3#
      • 1...Sdc3
        • 2.Bg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • R(e);N_GUARD::B(A),XR(e)
    • R(e);N_GUARD::B(A)
    • S(g);P_PINP(D),S_CUTR(e)::B(A)
  • Tries
    • Try
      • P(D);CHECK
      • Vars
        • K(f);P-FLIGHT::S(C)
      • Refutation
        • R(e);XP(D)
  • Actual
    • S(C);
    • Threat
      • S(C)
    • Vars
      • R(e);SBLOCK::QAR1(E),XP(h)
      • S(b);P_PINB(A),S_CUTR(e)::P(D)
      • S(g);P_PINP(D),S_CUTR(e)::B(A)
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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).