MESON Chess Problem Database

Problem Display
PID: 72642 (3r4/1pB1R3/2ppP2r/4k1P1/1pRNP3/1K3QNq/3b4/5n2 w - - 0 1)

Postma, Eelke

Tijdschrift vd KNSB, 1936

3r4/1pB1R3/2ppP2r/4k1P1/1pRNP3/1K3QNq/3b4/5n2

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qg2
      • 2.Qf5#
    • 1...Qf5
      • 2.Qxf5#
    • 1...Qxe6
      • 2.Qf5#
    • 1...Qh1
      • 2.Qf5#
    • 1...Qh2
      • 2.Qf5#
    • 1...Qh4
      • 2.Qf5#
    • 1...Qh5
      • 2.Qf5#
    • 1...Rh4
      • 2.Qf6#
    • 1...Rh5
      • 2.Qf6#
    • 1...Rxe6
      • 2.Qf6#
    • 1...Rf6
      • 2.Qxf6#
    • 1...Rh7
      • 2.Qf6#
    • 1...Rhh8
      • 2.Qf6#
    • 1...b5
      • 2.Sxc6#
    • 1...b6
      • 2.Sxc6#
  • Tries
    • 1.Qf4+?
      • 1...Bxf4
        • 2.Sf3#
      • 1...Kxf4!
  • Keys
    • 1.Sge2!
      • threat
        • 2.Rc5#
      • 1...Qxf3+
        • 2.Sxf3#
      • 1...Qxe6
        • 2.Qf5#
      • 1...Se3
        • 2.Qf4#
      • 1...c5
        • 2.Rxc5#
      • 1...b6
        • 2.Sxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 13
  • Sets
    • Q(c);N_GUARD::QAR1(B)
    • Q(c);N_GUARD::QAR1(B),XQ(c)
    • Q(c);N_GUARD,P_PINR(D),P_SPINQ(c),XP(H)::QAR1(B)
    • R(h);N_GUARD::QAB1(B)
    • R(h);N_GUARD,P_SPINR(h),XP(H)::QAB1(B)
    • R(h);N_GUARD::QAB1(B),XR(h)
    • P(i);N_GUARD::S(E),XP(f)
  • Tries
    • Try
      • Q(B);CHECK,P_SPINS(C)
      • Vars
        • B(b);SBLOCK,XQ(B)::S(E)
      • Refutation
        • K(e);S_FLIGHT,XQ(B)
  • Actual
    • S(C);P_SPINQ(B)
    • Threat
      • R(D)
    • Vars
      • Q(c);CHECK,XQ(B)::S(E),XQ(c)
      • Q(c);N_PINQ(B),P_PINR(D),P_SPINQ(c),XP(H)::QAR1(B)
      • S(a);N_PINQ(B)::QAB1(B)
      • P(f);::R(D),XP(f)
      • P(i);N_GUARD::S(E),XP(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).