MESON Chess Problem Database

Problem Display
PID: 249926 (1r4B1/5RnK/2p5/p2N2p1/rb2Q3/pk1p4/p1b5/B7 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Deutsche Schachzeitung, 1990

1r4B1/5RnK/2p5/p2N2p1/rb2Q3/pk1p4/p1b5/B7

#2

6 + 12

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...cxd5
      • 2.Qxd5#
  • Tries
    • 1.Se3?
      • threat
        • 2.Qc4#
      • 1...Be1
        • 2.Rb7#
      • 1...Bd2
        • 2.Rb7#
      • 1...Bc3
        • 2.Rb7#
      • 1...Bc5
        • 2.Rb7#
      • 1...Bd6
        • 2.Rb7#
      • 1...Bf8
        • 2.Rb7#
      • 1...d2
        • 2.Qxc2#
      • 1...Be7!
  • Keys
    • 1.Sb6!
      • threat
        • 2.Qc4#
      • 1...Rxb6
        • 2.Rxg7#
      • 1...Be1
        • 2.Qxa4#
      • 1...Bd2
        • 2.Qxa4#
      • 1...Bc3
        • 2.Qxa4#
      • 1...Bc5
        • 2.Qxa4#
      • 1...Bd6
        • 2.Qxa4#
      • 1...Be7
        • 2.Qxa4#
      • 1...Bf8
        • 2.Qxa4#
      • 1...d2
        • 2.Rf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 1
  • Sets
    • P(j);OGATE,XS(C)::QAB(B),XP(j)
  • Tries
    • Try
      • S(C);
      • Threat
        • QAB1(B)
      • Vars
        • B(g);::B(F)+R(D),DCHECK
        • P(e);OGATE,P_PINQ(B)::QAB1(B),XB(b)
      • Refutation
        • B(g);
  • Actual
    • S(C);
    • Threat
      • QAB1(B)
    • Vars
      • R(l);N_GUARD,XS(C)::B(F)+R(D),XS(k)
      • B(g);OGATE::QAB1(B),XR(f)
      • P(e);P_PINQ(B)::B(F)+R(D),DCHECK
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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).