MESON Chess Problem Database

Problem Display
PID: 176519 (kr2NR1b/rpR4K/N7/2BP4/Q7/8/8/8 w - - 0 1)

Tungler, Arno

Schach-Echo, 1976

kr2NR1b/rpR4K/N7/2BP4/Q7/8/8/8

#2

8 + 5

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rc8
      • 2.Rxc8#
    • 1...Rxe8
      • 2.Rxe8#
      • 2.Qxe8#
    • 1...bxa6
      • 2.Rxa7#
    • 1...b5
      • 2.Rxa7#
  • Tries
    • 1.Rg7?
      • threat
        • 2.Sac7#
        • 2.Sec7#
      • 1...Rxa6
        • 2.Sc7#
      • 1...Rxe8
        • 2.Rxe8#
        • 2.Qxe8#
      • 1...bxa6
        • 2.Rxa7#
      • 1...Rd8
        • 2.Sec7#
      • 1...Rc8
        • 2.Sec7#
      • 1...b5
        • 2.Rxa7#
      • 1...b6!
  • Keys
    • 1.Rxb7!
      • threat
        • 2.Rxa7#
      • 1...Raxb7+
        • 2.Sac7#
      • 1...Rbxb7+
        • 2.Sec7#
      • 1...Kxb7
        • 2.Qc6#
      • 1...Rxa6
        • 2.Qxa6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • R(d);OGATEB::R(E),XR(d)
    • P(b);OGATE,P_PINR(E),XS(D)::R1(E),XR(a)
    • P(b);OGATE,P_PINR(E)::R1(E),XR(a)
  • Tries
    • Try
      • R(E);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);P_SPINR(a),XS(D)::S(G)
        • P(b);OGATE,P_PINR(E),XS(D)::R1(E),XR(a)
        • R(d);::S(G)
        • P(b);OGATE,P_PINR(E)::R1(E),XR(a)
      • Refutation
        • P(b);P_PINR(E)
  • Actual
    • R(E);P_SPINR(E),XP(b)
    • Threat
      • R1(E),XR(a)
    • Vars
      • R(a);CHECK,SBLOCK,XR(E)::QAR(A)+S(D),DCHECK
      • R(d);CHECK,SBLOCK,XR(E)::R(H)+S(G),DCHECK
      • K(c);OGATEB,S_FLIGHT,XR(E)::QAB1(A)
      • R(a);N_PINR(E),OGATE,P_SPINR(a),XS(D)::QAR2(A),XR(a)
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).