MESON Chess Problem Database

Problem Display
PID: 119937 (8/8/8/3p4/3PN2Q/1P1k1p2/1K1pNP2/1n1rr3 w - - 0 1)

Erlin, Konrad (AKA Erlinger, Konrad)

Deutsche Schachzeitung, 1910

8/8/8/3p4/3PN2Q/1P1k1p2/1K1pNP2/1n1rr3

#2

7 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe2
      • 2.Sc5#
    • 1...fxe2
      • 2.Sc5#
  • Tries
    • 1.Qf4?
      • threat
        • 2.Qe3#
        • 2.Qxf3#
      • 1...Rxe2
        • 2.Sc5#
      • 1...fxe2
        • 2.Sc5#
        • 2.Qe3#
      • 1...dxe4
        • 2.Qe3#
      • 1...Kxe2!
    • 1.Qh6?
      • threat
        • 2.Qe3#
      • 1...Kxe2
        • 2.Qa6#
      • 1...Kxe4
        • 2.Qg6#
        • 2.Qh7#
      • 1...Rxe2!
  • Keys
    • 1.Qf6!
      • threat
        • 2.Qxf3#
      • 1...Kxe2
        • 2.Qa6#
      • 1...Kxe4
        • 2.Qg6#
      • 1...Rxe2
        • 2.Sc5#
      • 1...fxe2
        • 2.Sc5#
      • 1...dxe4
        • 2.Sf4#
        • 2.Qa6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(c);SBLOCK,XS(B)::S(F)
    • P(f);SBLOCK,XS(B)::S(F)
  • Tries
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • R(c);SBLOCK,XS(B)::S(F)
        • P(g);XS(F)::QAR1(G)
      • Refutation
        • K(e);S_FLIGHT,XS(B)
    • Try
      • Q(G);
      • Threat
        • QAR1(G)
      • Vars
        • K(e);S_FLIGHT,XS(B)::QAB(G)
      • Refutation
        • R(c);XS(B)
  • Actual
    • Q(G);
    • Threat
      • QAR2(G),XP(f)
    • Vars
      • K(e);S_FLIGHT,XS(B)::QAB(G)
      • K(e);OGATEB,S_FLIGHT,XS(F)::QAB(G)
      • R(c);SBLOCK,XS(B)::S(F)
      • P(f);SBLOCK,XS(B)::S(F)
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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).