MESON Chess Problem Database

Problem Display
PID: 272774 (2r5/6b1/2p5/1PRppQn1/1P1kP3/1P6/2K2P2/8 w - - 0 1)

Berg, Wolfgang

Schach-Aktiv, 1995

2r5/6b1/2p5/1PRppQn1/1P1kP3/1P6/2K2P2/8

#2

8 + 7

15601 Albrecht-Leiss-Degener Collection 2023

SOLUTION

  • SOUND
  • Sets
    • 1...dxe4
      • 2.Qd7#
  • Tries
    • 1.Rc3?
      • threat
        • 2.Rd3#
      • 1...dxe4
        • 2.Qd7#
      • 1...cxb5!
    • 1.Qf3?
      • threat
        • 2.Qd3#
        • 2.Qe3#
      • 1...dxe4
        • 2.Qd1#
        • 2.Qc3#
        • 2.Qe3#
      • 1...Sxf3!
    • 1.Qxg5?
      • threat
        • 2.Qe3#
      • 1...Kxe4
        • 2.Qg4#
      • 1...Bh6!
    • 1.exd5?
      • threat
        • 2.Qd3#
      • 1...e4
        • 2.Rc4#
      • 1...Se4!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Rc4#
      • 1...Kxe4
        • 2.Qg4#
      • 1...cxb5
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • P(b);OGATEB,SBLOCK,XP(E)::QAR(H)
  • Tries
    • Try
      • R(G);
      • Threat
        • R1(G)
      • Vars
        • P(b);OGATEB,SBLOCK,XP(E)::QAR(H)
      • Refutation
        • P(e);P_PINR(G),XP(F)
    • Try
      • Q(H);
      • Threat
        • DUALS(2)
      • Refutation
        • S(d);XQ(H)
    • Try
      • Q(H);XS(d)
      • Threat
        • QAB1(H)
      • Vars
        • K(a);OGATEB,P-FLIGHT,XP(E)::QAR2(H)
      • Refutation
        • B(f);
    • Try
      • P(E);XP(b)
      • Threat
        • QAR1(H)
      • Vars
        • P(c);::R1(G)
      • Refutation
        • S(d);
  • Actual
    • Q(H);P_PINP(b)
    • Threat
      • R1(G)
    • Vars
      • K(a);N_SPINP(b),OGATEB,P-FLIGHT,XP(E)::QAR2(H)
      • P(e);N_GUARD,P_PINR(G),XP(F)::QAR1(H),XP(b)
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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).