MESON Chess Problem Database

Problem Display
PID: 19305 (1b1N4/8/5p2/3P1k1P/3P1n2/3Pp1Q1/r3Bn1K/r4R2 w - - 0 1)

Persson, Hol Holger

2nd Prize, Vart Hem, 1935/IV

1b1N4/8/5p2/3P1k1P/3P1n2/3Pp1Q1/r3Bn1K/r4R2

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Sd1
      • 2.Qg4#
      • 2.Qg6#
    • 1...Sh1
      • 2.Qg4#
      • 2.Qg6#
    • 1...S2xd3
      • 2.Qg6#
    • 1...S2h3
      • 2.Qg4#
      • 2.Qg6#
    • 1...Se4
      • 2.Qg4#
      • 2.Qg6#
    • 1...Sg4+
      • 2.Qxg4#
    • 1...S4xd3
      • 2.Bxd3#
  • Tries
    • 1.Bg4+?
      • 1...Kg5
        • 2.Sf7#
      • 1...Sxg4+!
  • Keys
    • 1.Sf7!
      • threat
        • 2.Sh6#
      • 1...Sg4+
        • 2.Qxg4#
      • 1...S2xd3
        • 2.Qg6#
      • 1...S4xd3
        • 2.Bxd3#
      • 1...Sxd5
        • 2.Bg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(c);P_PINB(B),P_SPINS(e),XP(D)::QAB1(E)
    • S(c);CHECK,N_GUARD,P_PINB(B),P_SPINS(e)::QAB1(E),XS(c)
    • S(e);OGATE,P_PINQ(E),P_SPINS(c),XP(D)::B(B),XS(e)
  • Tries
    • Try
      • B(B);CHECK
      • Vars
        • K(f);P-FLIGHT::S(I)
      • Refutation
        • S(c);CHECK,P_SPINS(e),XB(B)
  • Actual
    • S(I);
    • Threat
      • S(I)
    • Vars
      • S(c);CHECK,N_GUARD,P_PINB(B),P_SPINS(e)::QAB1(E),XS(c)
      • S(c);P_PINB(B),P_SPINS(e),XP(D)::QAB1(E)
      • S(e);OGATE,P_PINQ(E),P_SPINS(c),XP(D)::B(B),XS(e)
      • S(e);P_PINQ(E),P_SPINS(c),XP(G)::B(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).