MESON Chess Problem Database

Problem Display
PID: 254588 (8/8/1K2b3/2B1p3/2k5/PRpR4/2qbr3/1BnN3Q w - - 0 1)

Klassen, A

Wiener Schachzeitung, 1936

8/8/1K2b3/2B1p3/2k5/PRpR4/2qbr3/1BnN3Q

#2

8 + 8

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd3
      • 2.Sb2#
    • 1...Qxd1
      • 2.Rb4#
    • 1...Qxd3
      • 2.Rb4#
    • 1...Qa2
      • 2.Rb4#
    • 1...Bh3
      • 2.Qd5#
    • 1...Bg4
      • 2.Qd5#
    • 1...Bd5
      • 2.Qxd5#
    • 1...Bf5
      • 2.Qd5#
    • 1...Bd7
      • 2.Qd5#
    • 1...Bc8
      • 2.Qd5#
  • Tries
    • 1.Qe4+?
      • 1...Kxb3
        • 2.Qb4#
      • 1...Rxe4!
  • Keys
    • 1.Qc6!
      • threat
        • 2.Qb5#
      • 1...Qxb3+
        • 2.Bb4#
      • 1...Kxb3
        • 2.Qb5#
      • 1...Kxd3
        • 2.Sb2#
      • 1...Qxd3
        • 2.Rb4#
      • 1...Sxd3
        • 2.Qxe6#
      • 1...Bd7
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • K(f);N_GUARD,P_SPINP(e),P_SPINQ(b),S_FLIGHT,XR(F)::S(B)
    • Q(b);XS(B)::R1(E)
    • Q(b);XR(F)::R1(E)
    • Q(b);::R1(E)
    • B(h);N_GUARD::QAB1(C)
    • B(h);N_GUARD::QAB1(C),XB(h)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • K(f);OGATE,P_SPINP(e),S_FLIGHT,XR(E)::QAR1(C)
      • Refutation
        • R(d);XQ(C)
  • Actual
    • Q(C);
    • Threat
      • QAB1(C)
    • Vars
      • Q(b);CHECK,SBLOCK,XR(E)::QAR(C)+B(G)
      • K(f);P_SPINP(e),S_FLIGHT,XR(E)::QAR2(C)
      • K(f);N_GUARD,P_SPINP(e),P_SPINQ(b),S_FLIGHT,XR(F)::S(B)
      • Q(b);XR(F)::R1(E)
      • S(a);SBLOCK,XR(F)::QAB(C),XB(h)
      • B(h);N_GUARD::QAB1(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).