MESON Chess Problem Database

Problem Display
PID: 177724 (4nr1Q/7p/b3Bb2/Rp2Pp2/n2Nk3/1R2P3/2P1N1PB/5K2 w - - 0 1)

Eerkes, Allard Pieter

Rigasche Rundschau, 1937

4nr1Q/7p/b3Bb2/Rp2Pp2/n2Nk3/1R2P3/2P1N1PB/5K2

#2

12 + 9

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bxe5
      • 2.Qxe5#
    • 1...Bg5
      • 2.Sg3#
    • 1...Be7
      • 2.Sg3#
    • 1...Bd8
      • 2.Sg3#
    • 1...b4
      • 2.Bd5#
      • 2.Bxf5#
  • Tries
    • 1.Sf3?
      • threat
        • 2.Sg3#
        • 2.Sd2#
      • 1...Bxe5
        • 2.Sd2#
        • 2.Sg5#
        • 2.Qxe5#
      • 1...Rg8
        • 2.Sd2#
      • 1...Bh4
        • 2.Sd2#
      • 1...b4
        • 2.Sd2#
        • 2.Bd5#
      • 1...f4
        • 2.Qxh7#
      • 1...Sc3!
  • Keys
    • 1.Sxf5!
      • threat
        • 2.Rb4#
      • 1...Bxe5
        • 2.Qxe5#
      • 1...Be7
        • 2.Sg3#
      • 1...Sb2
        • 2.Sc3#
      • 1...Sb6
        • 2.Sc3#
      • 1...Sd6
        • 2.Sxd6#
      • 1...b4
        • 2.Sg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • B(f);OGATE,XP(J)::QAR1(L),XB(f)
    • B(f);::S(C)
  • Tries
    • Try
      • S(H);
      • Threat
        • DUALS(2)
      • Vars
        • R(i);::S(H)
        • B(f);::S(H)
        • P(d);OGATEB::QAB(L),XP(g)
      • Refutation
        • S(a);
  • Actual
    • S(H);XP(d)
    • Threat
      • R(F)
    • Vars
      • B(f);OGATE,P_PINS(H),XP(J)::QAR1(L),XB(f)
      • B(f);P_PINS(H)::S(C)
      • S(a);N_GUARD::S(C)
      • S(h);N_GUARD::S(H),XS(h)
      • P(c);P_PINS(C)::S(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).