MESON Chess Problem Database

Problem Display
PID: 19142 (4n1K1/2nppP2/2pk1p1R/3qN3/N1B1P3/7b/1Q6/3R4 w - - 0 1)

Persson, Hol Holger

Vart Hem, 1932

4n1K1/2nppP2/2pk1p1R/3qN3/N1B1P3/7b/1Q6/3R4

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Se6
      • 2.fxe8S#
    • 1...e6
      • 2.f8Q#
      • 2.f8B#
  • Tries
    • 1.Sg4?
      • threat
        • 2.Qe5#
      • 1...Ke6
        • 2.Qe5#
      • 1...c5
        • 2.Qb6#
      • 1...e5
        • 2.Qxe5#
      • 1...Qd4
        • 2.e5#
      • 1...Se6
        • 2.fxe8S#
      • 1...e6
        • 2.f8Q#
        • 2.f8B#
      • 1...Bxg4!
  • Keys
    • 1.Sf3!
      • threat
        • 2.Qe5#
      • 1...Ke6
        • 2.Qe5#
      • 1...c5
        • 2.Qb6#
      • 1...e5
        • 2.Qxe5#
      • 1...Qd4
        • 2.e5#
      • 1...Be6
        • 2.Qh2#
      • 1...Se6
        • 2.fxe8S#
      • 1...e6
        • 2.f8Q#
        • 2.f8B#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(f);N_PINP(H),N_SPINP(e),SBLOCK::PXS(i)=S
    • P(h);N_PINP(H),N_SPINP(e),SBLOCK::P=Q
  • Tries
    • Try
      • S(F);
      • Threat
        • QAB1(B)
      • Vars
        • K(d);N_PINP(H),P-FLIGHT::QAR1(B)
        • P(c);OGATEB::QAR2(B)
        • P(h);::QAB1(B),XP(h)
        • Q(b);N_PINP(H)::P(E)
        • S(f);N_PINP(H),N_SPINP(e),SBLOCK::PXS(i)=S
        • P(h);N_PINP(H),N_SPINP(e),SBLOCK::P=Q
      • Refutation
        • B(a);XS(F)
  • Actual
    • S(F);
    • Threat
      • QAB1(B)
    • Vars
      • K(d);N_PINP(H),P-FLIGHT::QAR1(B)
      • P(c);OGATEB::QAR2(B)
      • P(h);::QAB1(B),XP(h)
      • Q(b);N_PINP(H)::P(E)
      • B(a);N_SPINP(e),SBLOCK,S_CUTP(h)::QAB(B)
      • S(f);N_PINP(H),N_SPINP(e),SBLOCK::PXS(i)=S
      • P(h);N_PINP(H),N_SPINP(e),SBLOCK::P=Q
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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).