MESON Chess Problem Database

Problem Display
PID: 57436 (b5BK/b5pn/r1p1Ppr1/5k2/2N3pP/qn5P/3p1N1Q/5R2 w - - 0 1)

Groeneveld, Cornelis

Chess Life, 1956

b5BK/b5pn/r1p1Ppr1/5k2/2N3pP/qn5P/3p1N1Q/5R2

#2

9 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Qc1
      • 2.Sd6#
    • 1...Qb2
      • 2.Sd6#
    • 1...Qd6
      • 2.Sxd6#
    • 1...Qa1
      • 2.Sd6#
    • 1...Qa2
      • 2.Sd6#
    • 1...Qa4
      • 2.Sd6#
    • 1...Qa5
      • 2.Sd6#
    • 1...Rb6
      • 2.Se3#
    • 1...Be3
      • 2.Sxe3#
    • 1...Bb8
      • 2.Se3#
    • 1...Sc5
      • 2.Sd6#
    • 1...Sg5
      • 2.hxg4#
    • 1...c5
      • 2.Se3#
  • Tries
    • 1.Sd3+?
      • 1...Bf2
        • 2.Qf4#
      • 1...Ke4!
  • Keys
    • 1.Qg2!
      • threat
        • 2.Qe4#
      • 1...Kf4
        • 2.Sd3#
      • 1...Bxf2
        • 2.Rxf2#
      • 1...Sc5
        • 2.Sd3#
      • 1...Sg5
        • 2.Qxg4#
      • 1...c5
        • 2.Se4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 2
    • REMOVED MATES = 10
  • Sets
    • Q(b);N_GUARD::S(E)
    • Q(b);N_GUARD::S(E),XQ(b)
    • R(f);S_CUTB(j)::S(E)
    • B(j);N_GUARD::S(E),XB(j)
    • B(j);N_GUARD::S(E)
    • S(c);S_CUTQ(b)::S(E)
    • S(l);S_CUTR(i)::P(D),XP(d)
    • P(g);S_CUTB(j)::S(E)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • B(j);P_SPINB(j)::QAR1(C)
      • Refutation
        • K(e);S_FLIGHT
  • Actual
    • Q(C);
    • Threat
      • QAB1(C)
    • Vars
      • K(e);P-FLIGHT::R(A)+S(B),DCHECK
      • B(j);OGATE,P_SPINB(j),XS(B)::R(A),XB(j)
      • S(c);S_CUTB(j)::R(A)+S(B)
      • S(l);S_CUTR(i)::QAB1(C),XP(d)
      • P(g);S_CUTB(j)::R(A)+S(B)
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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).