MESON Chess Problem Database

Problem Display
PID: 197774 (5B2/5p2/2N2kp1/6p1/6B1/R1r2N1K/8/5R2 w - - 0 1)

van Engelen, Adrianus Cornelis

Probleemblad, 1980

5B2/5p2/2N2kp1/6p1/6B1/R1r2N1K/8/5R2

#2

7 + 5

5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rc1
      • 2.Se1#
    • 1...Rc2
      • 2.Sd2#
    • 1...Rxf3+
      • 2.Rfxf3#
      • 2.Raxf3#
    • 1...Rc4
      • 2.Sfd4#
    • 1...Rc5
      • 2.Sfe5#
  • Tries
    • 1.Se7?
      • threat
        • 2.Sd5#
        • 2.Sg8#
      • 1...Rd3
        • 2.Sg8#
      • 1...Rc5
        • 2.Sg8#
      • 1...Rxf3+!
  • Keys
    • 1.Ra6!
      • 1...Rxf3+
        • 2.Rxf3#
      • 1...Rxc6
        • 2.Rxc6#
      • 1...Rd3
        • 2.Sd4#
      • 1...Rc1
        • 2.Se1#
      • 1...Rc2
        • 2.Sd2#
      • 1...Ra3
        • 2.Sa5#
      • 1...Rb3
        • 2.Sb4#
      • 1...Re3
        • 2.Se5#
      • 1...Rc4
        • 2.Sfd4#
      • 1...Rc5
        • 2.Sfe5#

Anticipated by 231598(1927)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • R(a);N_PINS(C)::R(A)+S(C)
  • Tries
    • Try
      • S(F);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);::S(F)
        • R(a);N_PINS(C)::S(F)
      • Refutation
        • R(a);CHECK,P_SPINR(a),XS(C)
  • Actual
    • R(B);
    • Vars
      • R(a);CHECK,OGATE,P_SPINR(a),XS(C)::R(A),XR(a)
      • R(a);N_PINS(C),OGATE,P_SPINR(a),XS(F)::R(B),XR(a)
      • R(a);N_GUARD::R(B)+S(F)
      • R(a);N_PINS(C)::R(A)+S(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).