MESON Chess Problem Database

Problem Display
PID: 65661 (8/6Q1/1p6/1pk1n3/p4BnR/5B2/K4NNb/3R4 w - - 0 1)

Capraez, Friedrich

Schachzeitung der Berliner Schachgesellschaft, 1857

8/6Q1/1p6/1pk1n3/p4BnR/5B2/K4NNb/3R4

#2

8 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Sxf2
      • 2.Be3#
    • 1...Se3
      • 2.Bxe3#
    • 1...Sf6
      • 2.Be3#
    • 1...Sh6
      • 2.Be3#
    • 1...Sd3
      • 2.Qc3#
    • 1...Sxf3
      • 2.Qc3#
    • 1...Sc4
      • 2.Sd3#
    • 1...Sc6
      • 2.Qc3#
    • 1...Sg6
      • 2.Qc3#
      • 2.Qd4#
    • 1...Sd7
      • 2.Qc3#
      • 2.Qd4#
    • 1...Sf7
      • 2.Qc3#
      • 2.Qd4#
  • Tries
    • 1.Qxe5+?
      • 1...Kc4
        • 2.Qd4#
      • 1...Sxe5
        • 2.Be3#
      • 1...Kb4!
    • 1.Qc7+?
      • 1...Kb4
        • 2.Bd2#
      • 1...Sc6!
  • Keys
    • 1.Rc1+!
      • 1...Kb4
        • 2.Bd2#
      • 1...Kd4
        • 2.Be3#
      • 1...Kd6
        • 2.Rc6#
      • 1...Sc4
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • S(c);N_GUARD,XS(C)::B(F)
    • S(c);N_GUARD::B(F),XS(c)
    • S(c);N_GUARD::B(F)
    • S(f);OGATE::QAR2(H)
    • S(f);OGATE,XB(E)::QAR2(H)
    • S(f);N_GUARD,SBLOCK::S(C)
  • Tries
    • Try
      • Q(H);CHECK,XS(f)
      • Vars
        • K(e);P-FLIGHT::QAR1(H)
        • S(c);XQ(H)::B(F)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • Q(H);CHECK
      • Vars
        • K(e);S_FLIGHT::B(F)
      • Refutation
        • S(f);P_SPINS(f)
  • Actual
    • R(A);CHECK
    • Vars
      • K(e);S_FLIGHT::B(F)
      • K(e);P_SPINS(f),S_FLIGHT::B(F)
      • K(e);OGATE,P_SPINS(f),S_FLIGHT::R1(A)
      • S(f);P_SPINS(f)::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).