MESON Chess Problem Database

Problem Display
PID: 17860 (8/4b2K/4r1p1/7k/5Q2/8/6N1/8 w - - 0 1)

Larsson, Bror

Norsk Vanforetidsskrift, 1952

8/4b2K/4r1p1/7k/5Q2/8/6N1/8

#2

3 + 4

2012 Miniature Chess Problems from Many Countries 1981
3295 Einfuhrung in die Welt des Schachproblem 1984
145 StrateGems 1998

SOLUTION

  • SOUND
  • Sets
    • 1...Rf6
      • 2.Qh4#
    • 1...Ba3
      • 2.Qh4#
    • 1...Bb4
      • 2.Qh4#
    • 1...Bh4
      • 2.Qxh4#
    • 1...Bc5
      • 2.Qh4#
    • 1...Bg5
      • 2.Qf3#
    • 1...Bd6
      • 2.Qh4#
    • 1...Bf8
      • 2.Qh4#
  • Tries
    • 1.Se3?
      • threat
        • 2.Qh6#
        • 2.Qg4#
      • 1...Re4
        • 2.Qh6#
      • 1...Bg5
        • 2.Qg4#
      • 1...Bf8
        • 2.Qg4#
      • 1...g5
        • 2.Qh2#
        • 2.Qg4#
      • 1...Rxe3!
    • 1.Qf5+?
      • 1...Bg5
        • 2.Qf3#
      • 1...g5
        • 2.Qh3#
      • 1...gxf5!
  • Keys
    • 1.Qg3!
      • threat
        • 2.Sf4#
      • 1...Re4
        • 2.Qxg6#
      • 1...Rf6
        • 2.Qh4#
      • 1...Bg5
        • 2.Qf3#
      • 1...Bd6
        • 2.Qh4#
      • 1...g5
        • 2.Qh3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • R(b);S_CUTB(d)::QAR1(B)
    • B(d);N_GUARD::QAR1(B)
    • B(d);N_GUARD::QAR1(B),XB(d)
    • B(d);SBLOCK::QAB(B)
  • Tries
    • Try
      • S(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(b);::QAR1(B)
        • B(d);::QAB1(B)
      • Refutation
        • R(b);XS(A)
    • Try
      • Q(B);CHECK
      • Vars
        • B(d);P_SPINB(d),SBLOCK::QAB(B)
        • P(c);P_SPINP(c),SBLOCK,S_CUTB(d)::QAR2(B)
      • Refutation
        • P(c);XQ(B)
  • Actual
    • Q(B);
    • Threat
      • S(A)
    • Vars
      • R(b);N_GUARD::QAB1(B),XP(c)
      • R(b);S_CUTB(d)::QAR1(B)
      • B(d);SBLOCK::QAB(B)
      • B(d);N_GUARD::QAR1(B)
      • P(c);SBLOCK,S_CUTB(d)::QAR2(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).