MESON Chess Problem Database

Problem Display
PID: 245719 (7B/5p2/4p1R1/5kpP/R3pP2/Q4N1n/r3n1PK/3B4 w - - 0 1)

Wirtanen, Erkki Aukusti

Sachove umeni (Ceskoslovensky sach), 1969

7B/5p2/4p1R1/5kpP/R3pP2/Q4N1n/r3n1PK/3B4

#2

10 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sexf4
      • 2.Sd4#
    • 1...Shxf4
      • 2.Rxg5#
    • 1...gxf4
      • 2.Sh4#
    • 1...g4
      • 2.Rf6#
  • Tries
    • 1.Rxg5+?
      • 1...Kxf4
        • 2.Be5#
      • 1...Sxg5!
  • Keys
    • 1.Se5!
      • threat
        • 2.Rf6#
      • 1...Kxf4
        • 2.Qf3#
      • 1...Sexf4
        • 2.Bg4#
      • 1...Shxf4
        • 2.g4#
      • 1...gxf4
        • 2.Qxh3#
      • 1...fxg6
        • 2.Qf8#
      • 1...f6
        • 2.Rxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(b);N_GUARD,P_PINP(B),SBLOCK,XP(G)::S(E)
    • S(c);N_GUARD,SBLOCK,XP(G)::R1(I),XP(f)
    • P(f);N_GUARD,SBLOCK,XP(G)::S(E)
    • P(f);SBLOCK::R1(I)
  • Tries
    • Try
      • R(I);CHECK,XP(f)
      • Vars
        • K(e);P-FLIGHT,P_SPINP(d),XP(G)::B(J)
      • Refutation
        • S(c);XR(I)
  • Actual
    • S(E);
    • Threat
      • R1(I)
    • Vars
      • K(e);OGATEB,P-FLIGHT,P_SPINP(d),XP(G)::QAR1(D)
      • S(b);OGATE,P_PINP(B),SBLOCK,XP(G)::B(A)
      • S(c);SBLOCK,XP(G)::P(B)
      • P(f);N_GUARD,SBLOCK,XP(G)::QAB(D),XS(c)
      • P(h);OGATEB,XR(I)::QAR(D)
      • P(h);::R1(I),XP(h)
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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).