MESON Chess Problem Database

Problem Display
PID: 227508 (8/4p1p1/3n2K1/3Bk3/n3P1p1/NQ2P3/p7/8 w - - 0 1)

Rittner, Rudolf

Arbeiter Schachzeitung, 1926

8/4p1p1/3n2K1/3Bk3/n3P1p1/NQ2P3/p7/8

#2

6 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sb2
      • 2.Qxb2#
      • 2.Qc3#
    • 1...Sc3
      • 2.Qxc3#
    • 1...Sc5
      • 2.Qb2#
      • 2.Qc3#
    • 1...Sb6
      • 2.Qb2#
      • 2.Qc3#
    • 1...Sc4
      • 2.Sxc4#
    • 1...Sb5
      • 2.Sc4#
    • 1...Sf5
      • 2.Sc4#
    • 1...Sb7
      • 2.Sc4#
    • 1...Sf7
      • 2.Sc4#
    • 1...Sc8
      • 2.Sc4#
    • 1...Se8
      • 2.Sc4#
  • Tries
    • 1.Qb2+?
      • 1...Sc3
        • 2.Qxc3#
      • 1...Sxb2!
    • 1.Qb8?
      • threat
        • 2.Sc4#
      • 1...Sb2
        • 2.Qxb2#
      • 1...Sb6!
  • Keys
    • 1.Qb7!
      • threat
        • 2.Qxe7#
      • 1...Sxe4
        • 2.Sc4#
      • 1...Sxb7
        • 2.Sc4#
      • 1...Sf5
        • 2.Sc4#
      • 1...Sc8
        • 2.Sc4#
      • 1...Sc5
        • 2.Qb2#
      • 1...e6
        • 2.Qxg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • S(b);N_GUARD::QAB(B),XS(b)
    • S(e);N_GUARD::S(A),XS(e)
    • S(e);N_GUARD::S(A)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAB(B),XS(b)
      • Refutation
        • S(b);XQ(B)
    • Try
      • Q(B);P_PINS(e)
      • Threat
        • S(A)
      • Vars
        • S(b);N_GUARD::QAB(B),XS(b)
      • Refutation
        • S(b);
  • Actual
    • Q(B);
    • Threat
      • QAR2(B),XP(f)
    • Vars
      • S(e);N_GUARD,XP(D)::S(A)
      • S(e);N_GUARD,XQ(B)::S(A)
      • S(e);N_GUARD::S(A)
      • S(b);N_GUARD::QAB(B)
      • P(f);OGATE::QAB(B),XP(g)
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).