MESON Chess Problem Database

Problem Display
PID: 53859 (4N1K1/4p3/2P1rpN1/1Qpk4/R2p4/4p3/8/1B6 w - - 0 1)

Servais, Albert

Het Belgisch Schaakbord (L'Echiquier Belge), 1951

4N1K1/4p3/2P1rpN1/1Qpk4/R2p4/4p3/8/1B6

#2

7 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Re4
      • 2.Ba2#
    • 1...Re5
      • 2.Sf4#
    • 1...Rxc6
      • 2.Qc4#
    • 1...Rd6
      • 2.Sc7#
    • 1...d3
      • 2.Ba2#
  • Tries
    • 1.Ra5?
      • threat
        • 2.Qxc5#
      • 1...Rxc6
        • 2.Qb3#
      • 1...Re4
        • 2.Ba2#
      • 1...Re5
        • 2.Sf4#
      • 1...Rd6
        • 2.Sc7#
      • 1...d3!
    • 1.Qb3+?
      • 1...c4
        • 2.Qxc4#
        • 2.Qb5#
      • 1...Kxc6!
  • Keys
    • 1.Rxd4+!
      • 1...Kxd4
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • R(e);SBLOCK::B(A)
    • R(e);SBLOCK::S(E)
    • R(e);SBLOCK,XP(D)::QAB1(C)
    • R(e);SBLOCK::S(F)
    • P(b);::B(A)
  • Tries
    • Try
      • R(B);
      • Threat
        • QAR1(C),XP(c)
      • Vars
        • R(e);SBLOCK,XP(D)::QAB(C)
        • R(e);SBLOCK::B(A)
        • R(e);SBLOCK::S(E)
        • R(e);SBLOCK::S(F)
      • Refutation
        • P(b);
    • Try
      • Q(C);CHECK,N_PINP(c)
      • Refutation
        • K(d);S_FLIGHT,XP(D)
  • Actual
    • R(B);CHECK,XP(b)
    • Vars
      • K(d);N_SPINP(c),P-FLIGHT,XR(B)::QAR1(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).