MESON Chess Problem Database

Problem Display
PID: 58328 (b1q1n2B/2bp4/6RK/7N/7k/4pp1p/7Q/4NB1r w - - 0 1)

Beale, John Lindsay

Chess Life, 1959

b1q1n2B/2bp4/6RK/7N/7k/4pp1p/7Q/4NB1r

#2

7 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rg1
      • 2.Qxh3#
    • 1...Bg3
      • 2.Qxg3#
    • 1...Bf4+
      • 2.Qxf4#
    • 1...Ba5
      • 2.Qg3#
      • 2.Qf4#
    • 1...Bb6
      • 2.Qg3#
      • 2.Qf4#
    • 1...Bd8
      • 2.Qg3#
      • 2.Qf4#
    • 1...Sd6
      • 2.Bf6#
      • 2.Qg3#
      • 2.Qf4#
    • 1...Sf6
      • 2.Bxf6#
    • 1...d5
      • 2.Sxf3#
    • 1...d6
      • 2.Qg3#
  • Tries
    • 1.Sf4?
      • threat
        • 2.Qg3#
      • 1...Bxf4+
        • 2.Qxf4#
      • 1...Rg1
        • 2.Qxh3#
      • 1...Rxh2!
    • 1.Qf2+?
      • 1...Bg3
        • 2.Qxg3#
      • 1...exf2!
  • Keys
    • 1.Sf6!
      • threat
        • 2.Rg4#
      • 1...Bf4+
        • 2.Qxf4#
      • 1...Sxf6
        • 2.Bxf6#
      • 1...Rg1
        • 2.Qxh3#
      • 1...d5
        • 2.Sxf3#
      • 1...d6
        • 2.Qg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • R(a);N_GUARD::QAR1(C),XP(d)
    • B(f);N_GUARD::QAB1(C),XB(f)
    • B(f);CHECK,N_GUARD::QAR2(C),XB(f)
    • S(j);N_GUARD::B(G),XS(j)
    • P(g);S_CUTB(h)::S(A),XP(c)
    • P(g);S_CUTB(f)::QAB1(C)
  • Tries
    • Try
      • S(D);
      • Threat
        • QAB1(C)
      • Vars
        • B(f);CHECK,OGATE,XS(D)::QAR2(C),XB(f)
        • R(a);N_GUARD::QAR1(C),XP(d)
      • Refutation
        • R(a);N_SPINP(d),XQ(C)
    • Try
      • Q(C);CHECK,N_PINP(d)
      • Vars
        • B(f);N_GUARD,P_SPINB(f)::QAB1(C),XB(f)
      • Refutation
        • P(b);XQ(C)
  • Actual
    • S(D);
    • Threat
      • R1(E)
    • Vars
      • B(f);CHECK,N_GUARD::QAR2(C),XB(f)
      • S(j);OGATE,XS(D)::B(G),XS(j)
      • R(a);N_GUARD::QAR1(C),XP(d)
      • P(g);S_CUTB(h)::S(A),XP(c)
      • P(g);S_CUTB(f)::QAB1(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).