MESON Chess Problem Database

Problem Display
PID: 73583 (n2QK1n1/2pp4/1p5p/4k3/3NN1P1/1B3PP1/5r2/1bb1R1B1 w - - 0 1)

Boersma, Kornelis Thomas

Tijdschrift vd KNSB, 1942

n2QK1n1/2pp4/1p5p/4k3/3NN1P1/1B3PP1/5r2/1bb1R1B1

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rd2
      • 2.f4#
    • 1...Rxf3
      • 2.Sxf3#
    • 1...Sf6+
      • 2.Qxf6#
    • 1...d5
      • 2.Qxd5#
    • 1...d6
      • 2.Sc6#
  • Tries
    • 1.Qxc7+?
      • 1...Kxd4
        • 2.Qd6#
        • 2.Qc3#
      • 1...d6
        • 2.Sc6#
        • 2.Qxd6#
      • 1...Sxc7+!
  • Keys
    • 1.Kxd7!
      • threat
        • 2.Sc6#
      • 1...Sf6+
        • 2.Qxf6#
      • 1...Kxd4
        • 2.Ke6#
      • 1...Rc2
        • 2.Sd2#
      • 1...Rd2
        • 2.f4#
      • 1...Se7
        • 2.Qh8#
      • 1...c6
        • 2.Sxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • R(c);N_GUARD,S_CUTB(b)::P(D)
    • R(c);XP(D)::S(F),XR(c)
    • S(j);CHECK,N_GUARD::QAB1(I),XS(j)
    • P(h);OGATE::QAR1(I),XP(h)
    • P(h);N_GUARD::S(F)
  • Tries
    • Try
      • Q(I);CHECK,XP(g)
      • Refutation
        • S(i);CHECK,XQ(I)
  • Actual
    • K(J);S_FLIGHT,XP(h)
    • Threat
      • S(F)
    • Vars
      • S(j);CHECK,N_GUARD::QAB1(I),XS(j)
      • K(d);P_SPINR(c),S_FLIGHT,XS(F)::QAR(I)+K(J)
      • R(c);N_GUARD,S_CUTB(a)::R(A)+S(G)
      • R(c);N_GUARD,P_PINS(F),S_CUTB(b)::P(D)
      • S(j);OGATE::QAB(I)
      • P(g);::S(F),XP(g)
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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).