MESON Chess Problem Database

Problem Display
PID: 261560 (8/1Q2Np2/3Pk1p1/R3n3/b3N3/3P3K/8/b7 w - - 0 1)

Kupper, Josef

Neue Zurcher Zeitung, 1955

8/1Q2Np2/3Pk1p1/R3n3/b3N3/3P3K/8/b7

#2

7 + 6

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Bd7
      • 2.Qd5#
    • 1...Sc6
      • 2.Qc8#
    • 1...Sd7
      • 2.Qd5#
  • Tries
    • 1.Sc5+?
      • 1...Kxd6
        • 2.Sc8#
      • 1...Kf6!
    • 1.Sg5+?
      • 1...Kxd6
        • 2.Sc8#
        • 2.Rd5#
      • 1...Kf6!
    • 1.Qc8+?
      • 1...Sd7
        • 2.Qc4#
      • 1...Bd7!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Sg7#
      • 1...Kxf5
        • 2.Qxf7#
      • 1...Sxd3
        • 2.Qe7#
      • 1...gxf5
        • 2.Qe7#
      • 1...Sf3
        • 2.Qe7#
      • 1...Sc4
        • 2.Qe7#
      • 1...Sg4
        • 2.Qe7#
      • 1...Sc6
        • 2.Qc8#
      • 1...Sd7
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • B(b);SBLOCK::QAB1(F)
    • S(c);N_GUARD,S_CUTB(b)::QAB(F)
    • S(c);SBLOCK::QAB1(F)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(d);N_GUARD,P-FLIGHT,XP(E)::S(G)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • S(C);CHECK
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c),SBLOCK::QAB(F)
      • Refutation
        • B(b);P_SPINB(b)
  • Actual
    • S(G);
    • Threat
      • S(G)
    • Vars
      • K(d);N_GUARD,P_SPINS(c),S_FLIGHT,XS(G)::QAR2(F),XP(f)
      • S(c);XP(A)::QAR1(F)
      • P(e);SBLOCK,XS(G)::QAR1(F)
      • S(c);::QAR1(F)
      • S(c);N_GUARD,S_CUTB(b)::QAB(F)
      • S(c);SBLOCK::QAB1(F)
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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).