MESON Chess Problem Database

Problem Display
PID: 249620 (8/1K1n4/8/1R6/2kP4/2P5/4p3/1Qn1B3 w - - 0 1)

Decker, Adolfph L

Deutsche Schachzeitung, 1898

8/1K1n4/8/1R6/2kP4/2P5/4p3/1Qn1B3

#2

6 + 4

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sd3
      • 2.Qb3#
    • 1...Sc5+
      • 2.Rxc5#
    • 1...Se5
      • 2.Rc5#
    • 1...Sb6
      • 2.Rc5#
    • 1...Sf6
      • 2.Rc5#
    • 1...Sb8
      • 2.Rc5#
    • 1...Sf8
      • 2.Rc5#
  • Tries
    • 1.Ra5?
      • threat
        • 2.Qb5#
      • 1...Sc5+
        • 2.Rxc5#
      • 1...Sb3!
  • Keys
    • 1.Qc2!
      • 1...Sc5+
        • 2.Rxc5#
      • 1...Kxb5
        • 2.c4#
      • 1...Sb3
        • 2.Qxe2#
      • 1...Sa2
        • 2.Qxe2#
      • 1...Sd3
        • 2.Qb3#
      • 1...Se5
        • 2.Rc5#
      • 1...Sb6
        • 2.Rc5#
      • 1...Sf6
        • 2.Rc5#
      • 1...Sb8
        • 2.Rc5#
      • 1...Sf8
        • 2.Rc5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD,SBLOCK::QAB1(A)
    • S(d);CHECK,N_GUARD::R1(E),XS(d)
    • S(d);N_GUARD::R1(E)
  • Tries
    • Try
      • R(E);
      • Threat
        • QAB1(A)
      • Vars
        • S(d);CHECK,N_GUARD::R1(E),XS(d)
      • Refutation
        • S(a);
  • Actual
    • Q(A);
    • Vars
      • S(d);CHECK,N_GUARD::R1(E),XS(d)
      • K(c);OGATE,S_FLIGHT,XR(E)::P(C)
      • S(a);N_GUARD::QAB(A),XP(b)
      • S(a);N_GUARD,SBLOCK::QAB1(A)
      • S(d);N_GUARD::R1(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).