MESON Chess Problem Database

Problem Display
PID: 243257 (8/2n3Rn/8/3p1K2/1B1kp1p1/1P1pp3/3N4/5b1Q w - - 0 1)

Holm, Carl-Ivar

Tidskrift for Schack, 1980

8/2n3Rn/8/3p1K2/1B1kp1p1/1P1pp3/3N4/5b1Q

#2

6 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Be2
      • 2.Qa1#
    • 1...Bg2
      • 2.Qa1#
    • 1...Bh3
      • 2.Qa1#
  • Tries
    • 1.Sf3+?
      • 1...exf3
        • 2.Rxg4#
      • 1...gxf3!
    • 1.Sxe4?
      • threat
        • 2.Bc3#
        • 2.Bc5#
      • 1...dxe4
        • 2.Qxe4#
      • 1...e2
        • 2.Bc5#
        • 2.Qg1#
      • 1...Sb5
        • 2.Bc5#
      • 1...Sa6
        • 2.Bc3#
      • 1...Se6
        • 2.Bc3#
      • 1...d2!
    • 1.Rd7?
      • threat
        • 2.Qxe4#
      • 1...Bg2
        • 2.Qa1#
      • 1...Sg5
        • 2.Qh8#
      • 1...Sf6!
  • Keys
    • 1.Rxg4!
      • threat
        • 2.Sf3#
      • 1...exd2
        • 2.Qg1#
      • 1...e2
        • 2.Qg1#
      • 1...Be2
        • 2.Qa1#
      • 1...Bg2
        • 2.Qa1#
      • 1...Sg5
        • 2.Qh8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • B(a);OGATE::QAB(A)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • P(e);XS(B)::R(F),XP(f)
      • Refutation
        • P(f);XS(B)
    • Try
      • S(B);XP(e)
      • Threat
        • DUALS(2)
      • Vars
        • P(g);OGATE,XS(B)::QAR1(A),XP(g)
        • S(h);::B(D)
      • Refutation
        • P(b);
    • Try
      • R(F);P_PINP(g)
      • Threat
        • QAR1(A),XP(e)
      • Vars
        • B(a);OGATE::QAB(A)
        • S(i);OGATE::QAB(A)
      • Refutation
        • S(i);
  • Actual
    • R(F);P_PINP(e),XP(f)
    • Threat
      • S(B)
    • Vars
      • P(c);OGATEB,XS(B)::QAB(A)
      • P(c);OGATEB::QAB(A)
      • B(a);OGATE::QAB(A)
      • S(i);OGATE::QAB(A)
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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).