MESON Chess Problem Database

Problem Display
PID: 24052 (k7/q1P1K3/8/1n6/Q7/4B3/8/8 w - - 0 1)

Kainer, Cenek

Narodni osvobozeni, 1927

k7/q1P1K3/8/1n6/Q7/4B3/8/8

#2

4 + 3

4872 Themes-64 1956
3295 Einfuhrung in die Welt des Schachproblem 1984
4883 Still More Fun with Chess Miniatures 2002
136 Problem Observer 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Qxa4
      • 2.c8Q#
    • 1...Qa5
      • 2.Qe4#
      • 2.c8Q#
    • 1...Qa6
      • 2.c8Q#
    • 1...Sa3
      • 2.Qxa7#
    • 1...Sc3
      • 2.Qxa7#
    • 1...Sd6
      • 2.Qxa7#
    • 1...Sxc7
      • 2.Qxa7#
  • Tries
    • 1.Kd7?
      • 1...Kb7
        • 2.c8Q#
      • 1...Qxa4
        • 2.c8Q#
      • 1...Sxc7
        • 2.Qxa7#
      • 1...Qa5
        • 2.Qe4#
        • 2.c8Q#
      • 1...Qa6
        • 2.c8Q#
      • 1...Sa3
        • 2.Qxa7#
      • 1...Sc3
        • 2.Qxa7#
      • 1...Sd6
        • 2.Qxa7#
      • 1...Sd4!
    • 1.Kf8?
      • threat
        • 2.c8Q#
      • 1...Sxc7
        • 2.Qxa7#
      • 1...Sd6
        • 2.Qxa7#
      • 1...Kb7!
    • 1.Bc5?
      • 1...Qxa4
        • 2.c8Q#
      • 1...Sxc7
        • 2.Qxa7#
      • 1...Sd4
        • 2.Qxa7#
      • 1...Qa5
        • 2.Qe4#
        • 2.c8Q#
      • 1...Qa6
        • 2.c8Q#
      • 1...Sa3
        • 2.Qxa7#
      • 1...Sc3
        • 2.Qxa7#
      • 1...Sd6
        • 2.Qxa7#
      • 1...Kb7!
    • 1.Bb6?
      • 1...Qxa4
        • 2.c8Q#
      • 1...Sxc7
        • 2.Qxa7#
      • 1...Sd4
        • 2.Qxa7#
      • 1...Qa5
        • 2.Qe4#
        • 2.c8Q#
      • 1...Qa6
        • 2.c8Q#
      • 1...Sa3
        • 2.Qxa7#
      • 1...Sc3
        • 2.Qxa7#
      • 1...Sd6
        • 2.Qxa7#
      • 1...Kb7!
  • Keys
    • 1.Kd8!
      • threat
        • 2.c8Q#
      • 1...Kb7
        • 2.c8Q#
      • 1...Sxc7
        • 2.Qxa7#
      • 1...Qa5
        • 2.Qe4#
      • 1...Sd6
        • 2.Qxa7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • Q(b);N_PINP(C),N_SPINQ(b),XQ(B)::P=Q
    • Q(b);N_PINP(C)::P=Q
    • S(a);N_GUARD::QAR1(B),XQ(b)
    • S(a);N_GUARD,XP(C)::QAR1(B),XQ(b)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Vars
        • K(c);N_PINP(C),N_SPINQ(b),S_FLIGHT::P=Q
        • Q(b);N_PINP(C),N_SPINQ(b),XQ(B)::P=Q
        • S(a);N_GUARD,XP(C)::QAR1(B),XQ(b)
        • Q(b);N_PINP(C)::P=Q
        • S(a);N_GUARD::QAR1(B),XQ(b)
      • Refutation
        • S(a);
    • Try
      • K(D);N_SPINP(C),S_FLIGHT
      • Threat
        • P=Q
      • Vars
        • S(a);N_GUARD,XP(C)::QAR1(B),XQ(b)
        • S(a);N_GUARD::QAR1(B),XQ(b)
      • Refutation
        • K(c);N_SPINQ(b),S_FLIGHT
    • Try
      • B(A);
      • Vars
        • Q(b);N_PINP(C),N_SPINQ(b),XQ(B)::P=Q
        • S(a);N_GUARD,XP(C)::QAR1(B),XQ(b)
        • S(a);N_GUARD::QAR1(B),XQ(b)
        • Q(b);N_PINP(C)::P=Q
      • Refutation
        • K(c);N_PINP(C),N_SPINQ(b),S_FLIGHT
    • Try
      • B(A);
      • Vars
        • Q(b);N_PINP(C),N_SPINQ(b),XQ(B)::P=Q
        • S(a);N_GUARD,XP(C)::QAR1(B),XQ(b)
        • S(a);N_GUARD::QAR1(B),XQ(b)
        • Q(b);N_PINP(C)::P=Q
      • Refutation
        • K(c);N_PINP(C),N_SPINQ(b),S_FLIGHT
  • Actual
    • K(D);N_SPINP(C),S_FLIGHT
    • Threat
      • P=Q
    • Vars
      • K(c);N_SPINQ(b),S_FLIGHT::P=Q
      • S(a);N_GUARD,XP(C)::QAR1(B),XQ(b)
      • Q(b);N_GUARD,P_PINP(C)::QAB(B)
      • S(a);N_GUARD::QAR1(B),XQ(b)
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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).