MESON Chess Problem Database

Problem Display
PID: 23431 (8/3K4/5p2/3k1n2/1Q6/5N2/8/8 w - - 0 1)

Boros, Sandor

Lazard, Frederic

Magyar Sakkvilag, 1926

8/3K4/5p2/3k1n2/1Q6/5N2/8/8

#2

3 + 3

2786 More Fun with Chess Miniatures 2000
5454 Near Snap 2010

SOLUTION

  • SOUND
  • Sets
    • 1...Se3
      • 2.Qd4#
    • 1...Sg3
      • 2.Qd4#
    • 1...Sd4
      • 2.Qxd4#
    • 1...Sh4
      • 2.Qd4#
    • 1...Sd6
      • 2.Qd4#
    • 1...Sh6
      • 2.Qd4#
    • 1...Se7
      • 2.Qd4#
    • 1...Sg7
      • 2.Qd4#
  • Tries
    • 1.Qc3?
      • threat
        • 2.Qc6#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Se7
        • 2.Qd4#
      • 1...Ke4!
    • 1.Qa4?
      • threat
        • 2.Qc6#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Se7
        • 2.Qd4#
      • 1...Kc5!
    • 1.Qf4?
      • 1...Sd4
        • 2.Qxd4#
      • 1...Se3
        • 2.Qd4#
      • 1...Sg3
        • 2.Qd4#
      • 1...Sh4
        • 2.Qd4#
      • 1...Sd6
        • 2.Qd4#
      • 1...Sh6
        • 2.Qd4#
      • 1...Se7
        • 2.Qd4#
      • 1...Sg7
        • 2.Qd4#
      • 1...Kc5!
    • 1.Qg4?
      • 1...Sd4
        • 2.Qxd4#
      • 1...Se3
        • 2.Qd4#
      • 1...Sg3
        • 2.Qd4#
      • 1...Sh4
        • 2.Qd4#
      • 1...Sd6
        • 2.Qd4#
      • 1...Sh6
        • 2.Qd4#
      • 1...Se7
        • 2.Qd4#
      • 1...Sg7
        • 2.Qd4#
      • 1...Kc5!
  • Keys
    • 1.Sd2!
      • 1...Ke5
        • 2.Qe4#
      • 1...Se3
        • 2.Qd6#
      • 1...Sg3
        • 2.Qd6#
      • 1...Sd4
        • 2.Qd6#
      • 1...Sh4
        • 2.Qd6#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Sh6
        • 2.Qd6#
      • 1...Se7
        • 2.Qd6#
      • 1...Sg7
        • 2.Qd6#

Anticipated by 137435(1923)

This anticipates 135946(1969), 171356(1995), 171403(1995)

There are these versions: 227679

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 8
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(b);N_GUARD::QAR1(B)
    • S(b);N_GUARD::QAR1(B),XS(b)
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • S(b);N_GUARD::QAR1(B),XS(b)
        • S(b);N_GUARD::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • S(b);N_GUARD::QAR1(B),XS(b)
        • S(b);N_GUARD::QAR1(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);
      • Vars
        • S(b);N_GUARD::QAR1(B),XS(b)
        • S(b);N_GUARD::QAR1(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);
      • Vars
        • S(b);N_GUARD::QAR1(B),XS(b)
        • S(b);N_GUARD::QAR1(B)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • S(A);
    • Vars
      • K(a);P-FLIGHT::QAR1(B)
      • S(b);N_GUARD::QAR1(B)
      • S(b);N_GUARD,SBLOCK::QAR1(B)
      • S(b);N_GUARD::QAR1(B),XS(b)
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).