MESON Chess Problem Database

Problem Display
PID: 229695 (B3R3/6Qp/2n3pK/3nN2R/4kp2/5p1N/5B2/1b6 w - - 0 1)

Berg, Wolfgang

Freie Presse, 1988

B3R3/6Qp/2n3pK/3nN2R/4kp2/5p1N/5B2/1b6

#2

8 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...gxh5
      • 2.Qxh7#
    • 1...g5
      • 2.Qxh7#
  • Tries
    • 1.Sd3+?
      • 1...Sde7
        • 2.Sc5#
        • 2.Qd4#
      • 1...Se5
        • 2.Sc5#
      • 1...Sce7
        • 2.Sc5#
        • 2.Qd4#
      • 1...Kxd3!
    • 1.Sxc6+?
      • 1...Se7
        • 2.Sb4#
        • 2.Qd4#
      • 1...Kd3!
    • 1.Sd7+?
      • 1...Sde7
        • 2.Sc5#
        • 2.Qd4#
      • 1...Se5
        • 2.Sc5#
      • 1...Sce7
        • 2.Sc5#
        • 2.Qd4#
      • 1...Kd3!
    • 1.Qf7?
      • threat
        • 2.Sg5#
      • 1...Sxe5
        • 2.Qxd5#
      • 1...Sf6
        • 2.Qc4#
      • 1...Sde7
        • 2.Qc4#
      • 1...Sce7
        • 2.Qxf4#
      • 1...g5
        • 2.Sxg5#
        • 2.Qxh7#
      • 1...Se3!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Sg5#
      • 1...Sxe5
        • 2.Qxd5#
      • 1...Sde7
        • 2.Qd4#
      • 1...Sce7
        • 2.Qa4#
      • 1...g5
        • 2.Sxg5#
        • 2.Qxh7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • P(g);OGATEB,XR(D)::QAB(F),XP(h)
    • P(g);OGATEB::QAB(F),XP(h)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • S(f);P_SPINS(e)::S(C)
      • Refutation
        • K(c);S_FLIGHT,XS(C)
    • Try
      • S(C);CHECK,XS(f)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • S(C);CHECK
      • Vars
        • S(f);P_SPINS(e)::S(C)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(F);
      • Threat
        • S(B)
      • Vars
        • S(f);P_SPINS(e),XS(C)::QAB1(F),XS(e)
        • S(e);OGATE,P_SPINS(f)::QAR2(F)
        • S(f);P_SPINS(e)::QAR1(F),XP(d)
      • Refutation
        • S(e);P_SPINS(f)
  • Actual
    • Q(F);
    • Threat
      • S(B)
    • Vars
      • S(f);P_SPINS(e),XS(C)::QAB1(F),XS(e)
      • S(e);OGATE,P_SPINS(f)::QAR1(F)
      • S(f);OGATE,P_SPINS(e)::QAR(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).