MESON Chess Problem Database

Problem Display
PID: 52151 (q1bn2B1/1r2N2p/5pp1/p1P1k3/1p1p2Q1/3P2PK/4P2N/4n3 w - - 0 1)

Groeneveld, Cornelis

Comm., Problem Observer, 2000

q1bn2B1/1r2N2p/5pp1/p1P1k3/1p1p2Q1/3P2PK/4P2N/4n3

#2

9 + 12

102 Probleemblad 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Rd7
      • 2.Qf4#
    • 1...Bxg4+
      • 2.Sxg4#
    • 1...Sc2
      • 2.Sf3#
    • 1...Sg2
      • 2.Sf3#
    • 1...Sxd3
      • 2.Sf3#
    • 1...Sf3
      • 2.Sxf3#
    • 1...Sc6
      • 2.Sxc6#
    • 1...Se6
      • 2.Qe4#
    • 1...h5
      • 2.Sxg6#
    • 1...h6
      • 2.Sxg6#
  • Tries
    • 1.Qe6+?
      • 1...Sxe6
        • 2.Sg4#
      • 1...Bxe6+!
  • Keys
    • 1.e3!
      • threat
        • 2.exd4#
      • 1...Bxg4+
        • 2.Sxg4#
      • 1...dxe3
        • 2.d4#
      • 1...f5
        • 2.Qxd4#
      • 1...Rd7
        • 2.Qf4#
      • 1...Sc2
        • 2.Sf3#
      • 1...Sf3
        • 2.Sxf3#
      • 1...Sc6
        • 2.Sxc6#
      • 1...Se6
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • R(h);N_PINQ(F)::QAB1(F)
    • B(k);CHECK,XQ(F)::S(B),XB(k)
    • S(a);N_GUARD::S(B)
    • S(a);N_GUARD,XP(C)::S(B)
    • S(a);N_GUARD::S(B),XS(a)
    • S(l);N_GUARD::S(H),XS(l)
    • S(l);N_PINQ(F)::QAR1(F)
    • P(i);N_GUARD::S(H),XP(g)
  • Tries
    • Try
      • Q(F);CHECK
      • Vars
        • S(l);XQ(F)::S(B)
      • Refutation
        • B(k);CHECK,XQ(F)
  • Actual
    • P(A);
    • Threat
      • P(A),XP(c)
    • Vars
      • B(k);CHECK,XQ(F)::S(B),XB(k)
      • P(c);OGATE,XP(A)::P(C)
      • P(f);N_PINQ(F)::QAB1(F),XP(c)
      • R(h);N_PINQ(F)::QAB1(F)
      • S(a);N_GUARD::S(B)
      • S(a);N_GUARD::S(B),XS(a)
      • S(l);N_GUARD::S(H),XS(l)
      • S(l);N_PINQ(F)::QAR1(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).