MESON Chess Problem Database

Problem Display
PID: 9661 (qn6/brr4p/b2B4/2P2p2/1kB5/2ppNQ2/8/R6K w - - 0 1)

Palkoska, Emil

Tidskrift for Schack, 1907

qn6/brr4p/b2B4/2P2p2/1kB5/2ppNQ2/8/R6K

#2

7 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rb6
      • 2.c6#
  • Tries
    • 1.Qd1?
      • threat
        • 2.Ra4#
        • 2.Qb3#
        • 2.Qa4#
        • 2.Qb1#
      • 1...Rb6+
        • 2.c6#
      • 1...Bxc4
        • 2.Qa4#
      • 1...c2
        • 2.Qd2#
      • 1...Bb5
        • 2.Qb3#
        • 2.Qb1#
      • 1...Rb5+!
  • Keys
    • 1.Qf4!
      • threat
        • 2.Sd5#
      • 1...Rb5+
        • 2.Bd5#
      • 1...Rb6+
        • 2.c6#
      • 1...Bxc4
        • 2.Qxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(g);P_PINQ(D),S_CUTB(f)::B(G)+P(F)
  • Tries
    • Try
      • Q(D);
      • Threat
        • DUALS(4)
      • Vars
        • R(g);CHECK,S_CUTB(f)::B(G)+P(F)
        • B(e);XB(E)::QAR1(D)
        • P(a);OGATEB::QAB(D)
      • Refutation
        • R(g);CHECK
  • Actual
    • Q(D);
    • Threat
      • S(C)
    • Vars
      • R(g);CHECK,SBLOCK,S_CUTB(e)::QAR(D)+B(E)
      • R(g);CHECK,S_CUTB(f)::B(G)+P(F)
      • B(e);OGATE,P_SPINB(e),XB(E)::QAR1(D),XB(e)
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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).