Problem Display
PID: 40696 (1Q3Kb1/8/2p1pN2/7p/3nPB1k/7P/6P1/5r2 w - - 0 1)

von Wardener, Friedrich Freiherr

Revue d'Echecs, 1906

1Q3Kb1/8/2p1pN2/7p/3nPB1k/7P/6P1/5r2

#2

7 + 7


3360 Simple Two-move Themes 1924
14868 Pirnie Collection 2013

SOLUTION


  • SOUND
  • Sets
    • 1...Rxf4
      • 2.Qxf4#
  • Tries
    • 1.Qe5?
      • threat
        • 2.Bg3#
        • 2.Bg5#
        • 2.Qg5#
        • 2.Qxh5#
      • 1...Rxf4
        • 2.Qxf4#
      • 1...Rf3
        • 2.Bg5#
        • 2.Qg5#
        • 2.Qxh5#
      • 1...Bf7
        • 2.Bg3#
        • 2.Bg5#
        • 2.Qg5#
      • 1...Se2
        • 2.Bg5#
        • 2.Qg5#
        • 2.Qxh5#
      • 1...Sf3
        • 2.Bg3#
        • 2.Qxh5#
      • 1...Sf5!
  • Keys
    • 1.Sh7!
      • threat
        • 2.Qd8#
      • 1...Rxf4+
        • 2.Qxf4#
      • 1...Sf3
        • 2.Bg3#
      • 1...Sf5
        • 2.Bg5#

There are these versions: 182256

FEATURES


  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(a);OGATE,P_PINS(E),XB(D)::QAR2(F),XR(a)
  • Tries
    • Try
      • Q(F);
      • Threat
        • DUALS(4)
      • Vars
        • R(a);OGATE,P_PINS(E),XB(D)::QAR2(F),XR(a)
      • Refutation
        • S(b);
  • Actual
    • S(E);P_SPINB(D)
    • Threat
      • QAB(F)
    • Vars
      • R(a);CHECK,OGATE,XB(D)::QAR2(F),XR(a)
      • S(b);N_PINB(D)::B(D)


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).