MESON Chess Problem Database

Problem Display
PID: 51341 (2R4B/P1b5/1p6/q2N3Q/r1k5/pNp5/B1P1R3/6K1 w - - 0 1)

Bettinger, Clark C

Manchester Guardian, 1957

2R4B/P1b5/1p6/q2N3Q/r1k5/pNp5/B1P1R3/6K1

#2

10 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qb4
      • 2.Se3#
    • 1...Qb5
      • 2.Re4#
    • 1...Qc5+
      • 2.Sd4#
    • 1...Rb4
      • 2.Se3#
    • 1...b5
      • 2.Re4#
  • Tries
    • 1.Sxb6+?
      • 1...Kb4
        • 2.Re4#
      • 1...Qxb6+!
    • 1.Rxc7+?
      • 1...Qc5+
        • 2.Sd4#
      • 1...Kb5!
    • 1.Qg4+?
      • 1...Kxd5
        • 2.Qe6#
      • 1...Kb5!
  • Keys
    • 1.Qe8!
      • 1...Qc5+
        • 2.Sd4#
      • 1...Kxd5
        • 2.Qe6#
      • 1...Qxd5
        • 2.Qxa4#
      • 1...Qxa7
        • 2.Qc6#
      • 1...Qb4
        • 2.Se3#
      • 1...Qb5
        • 2.Qe4#
      • 1...Qa6
        • 2.Qc6#
      • 1...Rb4
        • 2.Se3#
      • 1...b5
        • 2.Qc6#
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • Q(e);SBLOCK::S(F)
    • Q(e);SBLOCK::R(D)
    • Q(e);CHECK,N_SPINB(g),SBLOCK::B(B)+S(E)
    • R(c);SBLOCK::S(F)
    • P(f);SBLOCK::R(D)
  • Tries
    • Try
      • S(F);CHECK,XP(f)
      • Vars
        • K(d);N_SPINB(g),P-FLIGHT::R(D)
      • Refutation
        • Q(e);CHECK,XS(F)
    • Try
      • R(I);CHECK,XB(g)
      • Vars
        • Q(e);CHECK,P_SPINQ(e)::B(B)+S(E)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(G);CHECK
      • Vars
        • K(d);N_SPINB(g),OGATEB,S_FLIGHT,XS(F)::QAB1(G)
      • Refutation
        • K(d);N_SPINB(g),S_FLIGHT
  • Actual
    • Q(G);
    • Vars
      • Q(e);CHECK,N_SPINB(g),SBLOCK::B(B)+S(E)
      • K(d);N_SPINB(g),OGATEB,S_FLIGHT,XS(F)::QAB1(G)
      • Q(e);N_GUARD,SBLOCK,XS(F)::QAR2(G),XR(c)
      • Q(e);N_GUARD,XP(H)::QAR2(G)
      • Q(e);SBLOCK::S(F)
      • Q(e);SBLOCK::QAR2(G)
      • Q(e);N_GUARD::QAR2(G)
      • R(c);SBLOCK::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).