MESON Chess Problem Database

Problem Display
PID: 37525 (1b2n3/3p1R2/2p1k1P1/2QN4/K4P2/6pq/8/8 w - - 0 1)

Kupper, Josef

National-Zeitung, 1974

1b2n3/3p1R2/2p1k1P1/2QN4/K4P2/6pq/8/8

#2

6 + 7

3690 Kunstschach in der Schweiz 1980

SOLUTION

  • SOUND
  • Sets
    • 1...Qf5
      • 2.Re7#
    • 1...Bxf4
      • 2.Sxf4#
    • 1...Sd6
      • 2.Rf6#
    • 1...Sf6
      • 2.Rxf6#
    • 1...Sc7
      • 2.Rf6#
    • 1...Sg7
      • 2.Rf6#
    • 1...cxd5
      • 2.Qe7#
  • Tries
    • 1.Sc3?
      • threat
        • 2.Qe7#
      • 1...Bd6
        • 2.Qc4#
      • 1...Sd6
        • 2.Qe5#
      • 1...Sf6
        • 2.Re7#
      • 1...d6
        • 2.Qe3#
      • 1...Qh4!
    • 1.Sb6?
      • threat
        • 2.Qe7#
      • 1...Bd6
        • 2.Qc4#
      • 1...Sd6
        • 2.Qe5#
      • 1...Sf6
        • 2.Re7#
      • 1...d6
        • 2.Qe3#
      • 1...Qh4!
    • 1.Sc7+?
      • 1...Sxc7
        • 2.Qe5#
      • 1...Bxc7!
    • 1.f5+?
      • 1...Qxf5
        • 2.Re7#
      • 1...Ke5!
  • Keys
    • 1.Sb4!
      • threat
        • 2.Qe7#
      • 1...Qh4
        • 2.f5#
      • 1...Bd6
        • 2.Qc4#
      • 1...Sd6
        • 2.Qe5#
      • 1...Sf6
        • 2.Re7#
      • 1...d6
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • Q(b);SBLOCK::R1(F)
    • B(f);XP(B)::S(D),XB(f)
    • S(g);N_GUARD::R1(F)
    • S(g);N_GUARD::R1(F),XS(g)
    • P(c);SBLOCK,XS(D)::QAR1(C)
  • Tries
    • Try
      • S(D);
      • Threat
        • QAR1(C)
      • Vars
        • B(f);SBLOCK,S_CUTP(e)::QAB(C)
        • S(g);S_CUTB(f)::QAR1(C)
        • S(g);SBLOCK::R1(F)
        • P(e);SBLOCK,S_CUTB(f)::QAR(C)
      • Refutation
        • Q(b);P_PINP(B)
    • Try
      • S(D);
      • Threat
        • QAR1(C)
      • Vars
        • B(f);SBLOCK,S_CUTP(e)::QAB(C)
        • S(g);S_CUTB(f)::QAR1(C)
        • S(g);SBLOCK::R1(F)
        • P(e);SBLOCK,S_CUTB(f)::QAR(C)
      • Refutation
        • Q(b);P_PINP(B)
    • Try
      • S(D);CHECK
      • Vars
        • S(g);XS(D)::QAR1(C)
      • Refutation
        • B(f);XS(D)
    • Try
      • P(B);CHECK
      • Vars
        • Q(b);SBLOCK,XP(B)::R1(F)
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • S(D);
    • Threat
      • QAR1(C)
    • Vars
      • Q(b);N_GUARD::P(B)
      • B(f);SBLOCK,S_CUTP(e)::QAB(C)
      • S(g);S_CUTB(f)::QAR1(C)
      • S(g);SBLOCK::R1(F)
      • P(e);SBLOCK,S_CUTB(f)::QAR(C)
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).