MESON Chess Problem Database

Problem Display
PID: 245850 (8/8/p1B2Np1/8/1Bk1pn2/KN2q3/P1Pp1Qb1/3n2b1 w - - 0 1)

Beck, Friedrich

Europa-Rochade, 1986

8/8/p1B2Np1/8/1Bk1pn2/KN2q3/P1Pp1Qb1/3n2b1

#2

8 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qd4
      • 2.Sa5#
    • 1...Qc5
      • 2.Sxd2#
    • 1...Qb6
      • 2.Sxd2#
    • 1...Qa7
      • 2.Sxd2#
      • 2.Sa5#
    • 1...Qe1
      • 2.Sa5#
    • 1...Qe2
      • 2.Sa5#
    • 1...Qxb3+
      • 2.axb3#
  • Tries
    • 1.Sg4?
      • threat
        • 2.Se5#
      • 1...Qxb3+
        • 2.axb3#
      • 1...Qd4
        • 2.Sa5#
      • 1...Qc5
        • 2.Sxd2#
      • 1...Sd3
        • 2.Qf7#
      • 1...Qc3!
    • 1.Se8?
      • threat
        • 2.Sd6#
      • 1...Qxb3+
        • 2.axb3#
      • 1...Qd4
        • 2.Sa5#
      • 1...Qc5
        • 2.Sxd2#
      • 1...Qd3!
  • Keys
    • 1.Sd7!
      • threat
        • 2.Se5#
      • 1...Qxb3+
        • 2.axb3#
      • 1...Qd4
        • 2.Sa5#
      • 1...Qc5
        • 2.Sxd2#
      • 1...Qc3
        • 2.Sb6#
      • 1...Sd3
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • Q(e);N_PINS(E)::S(E)
    • Q(e);N_PINS(E),P_PINB(F)::S(E),XP(c)
    • Q(e);N_PINS(E)::S(E),XP(c)
    • Q(e);CHECK,OGATE,XS(E)::P(A),XQ(e)
  • Tries
    • Try
      • S(H);
      • Threat
        • S(H)
      • Vars
        • Q(e);CHECK,OGATE,XS(E)::P(A),XQ(e)
        • Q(e);N_PINS(E)::S(E)
        • Q(e);N_PINS(E),P_PINB(F)::S(E),XP(c)
        • S(h);N_PINS(E),OGATE::QAB(C)
      • Refutation
        • Q(e);
    • Try
      • S(H);
      • Threat
        • S(H)
      • Vars
        • Q(e);CHECK,OGATE,XS(E)::P(A),XQ(e)
        • Q(e);N_PINS(E)::S(E)
        • Q(e);N_PINS(E),P_PINB(F)::S(E),XP(c)
      • Refutation
        • Q(e);
  • Actual
    • S(H);
    • Threat
      • S(H)
    • Vars
      • Q(e);CHECK,OGATE,XS(E)::P(A),XQ(e)
      • Q(e);N_PINS(E)::S(E)
      • Q(e);N_PINS(E),P_PINB(F)::S(E),XP(c)
      • Q(e);N_GUARD::S(H)
      • S(h);N_PINS(E),OGATE::QAB(C)
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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).