MESON Chess Problem Database

Problem Display
PID: 22063 (b5Q1/5p1r/6Np/4p3/R4qkB/6N1/2rbP2K/3B4 w - - 0 1)

ten Cate, Pieter

4th Prize, Brisbane Courier, 1924

b5Q1/5p1r/6Np/4p3/R4qkB/6N1/2rbP2K/3B4

#2

8 + 9

56 The Problemist 1938

SOLUTION

  • SOUND
  • Sets
    • 1...Qxa4
      • 2.e4#
    • 1...Qb4
      • 2.e4#
    • 1...Qd4
      • 2.e4#
    • 1...Qe4
      • 2.e3#
    • 1...Rc6
      • 2.e3#
    • 1...Bf3
      • 2.exf3#
  • Tries
    • 1.Sxf4+?
      • 1...Kxh4
        • 2.Sf5#
        • 2.Sg2#
      • 1...Rg7!
    • 1.Se7+?
      • 1...Kxh4
        • 2.Sf5#
      • 1...Rg7!
    • 1.Qc8+?
      • 1...f5
        • 2.Qxf5#
      • 1...Rxc8!
  • Keys
    • 1.Bf6!
      • threat
        • 2.Sxe5#
      • 1...Qxa4
        • 2.e4#
      • 1...fxg6
        • 2.Qe6#
        • 2.Qxg6#
      • 1...Qb4
        • 2.e4#
      • 1...Qc4
        • 2.Qc8#
      • 1...Qd4
        • 2.e4#
      • 1...Qe4
        • 2.e3#
      • 1...e4
        • 2.Se5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • Q(c);N_GUARD,N_PINS(D),N_SPINQ(c),XR(E)::B(A)+P(B)
    • Q(c);N_GUARD,N_PINS(D)::B(A)+P(B)
    • Q(c);N_PINS(D),S_CUTB(i)::B(A)+P(B)
    • R(a);S_CUTB(i)::B(A)+P(B)
    • B(i);OGATE::P(B),XB(i)
  • Tries
    • Try
      • S(G);CHECK,N_SPINS(D),XQ(c)
      • Refutation
        • R(h);P_SPINR(h)
    • Try
      • S(G);CHECK
      • Vars
        • K(d);P-FLIGHT,XB(F)::S(G)
      • Refutation
        • R(h);P_SPINR(h)
    • Try
      • Q(H);CHECK
      • Vars
        • P(g);P_SPINP(g)::QAB1(H),XP(g)
      • Refutation
        • R(a);XQ(H)
  • Actual
    • B(F);
    • Threat
      • QAR(H)+S(G),DCHECK,XP(e)
    • Vars
      • Q(c);N_GUARD,N_PINS(D),N_SPINQ(c),XR(E)::B(A)+P(B)
      • Q(c);N_GUARD,N_PINS(D)::B(A)+P(B)
      • Q(c);N_PINS(D),S_CUTR(a)::QAB(H)
      • Q(c);N_PINS(D),S_CUTB(i)::B(A)+P(B)
      • P(e);N_SPINQ(c)::QAR(H)+S(G),DCHECK
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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).