MESON Chess Problem Database

Problem Display
PID: 71096 (n5B1/4p3/1p6/1NkPQ3/KN1r1p2/PP2r3/p1P4b/q3n1B1 w - - 0 1)

Seilberger, Johann Joseph Petrus Adrianus

Problem (Zagreb), 1953

n5B1/4p3/1p6/1NkPQ3/KN1r1p2/PP2r3/p1P4b/q3n1B1

#2

10 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Qxd4#
    • 1...Qc1
      • 2.Qxd4#
    • 1...Rxb3
      • 2.d6#
    • 1...Rc3
      • 2.Bxd4#
      • 2.Qxd4#
      • 2.Qxe7#
      • 2.d6#
    • 1...Red3
      • 2.Qxe7#
      • 2.d6#
    • 1...Rf3
      • 2.Qxe7#
      • 2.d6#
    • 1...Rg3
      • 2.Qxe7#
      • 2.d6#
    • 1...Rh3
      • 2.Qxe7#
      • 2.d6#
    • 1...Rd1
      • 2.Sa6#
      • 2.Qxe7#
    • 1...Rd2
      • 2.Sa6#
      • 2.Qxe7#
    • 1...Rdd3
      • 2.Sa6#
      • 2.Qxe7#
    • 1...Rxb4+
      • 2.axb4#
    • 1...Rc4
      • 2.Qxe7#
    • 1...Rxd5
      • 2.Qxd5#
    • 1...Sc7
      • 2.Qxc7#
    • 1...e6
      • 2.Qd6#
  • Tries
    • 1.Qe6?
      • threat
        • 2.Qc6#
      • 1...Rxb4+
        • 2.axb4#
      • 1...Rxe6!
    • 1.d6+?
      • 1...Rd5
        • 2.Qxd5#
      • 1...Rxe5!
  • Keys
    • 1.c4!
      • threat
        • 2.Sa6#
      • 1...Rxb3
        • 2.d6#
      • 1...Rxc4
        • 2.Qxe7#
      • 1...Rxd5
        • 2.Qxd5#
      • 1...Sc7
        • 2.Qxc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 4
  • Sets
    • Q(a);N_GUARD::QAB1(I),XR(f)
    • R(e);N_GUARD,P_SPINR(f),XP(D)::QAR(I)+P(H)
    • R(f);CHECK,OGATE,P_SPINR(e),XS(F)::P(C),XR(f)
    • R(f);P_SPINR(e)::QAB(I),XP(j)
    • R(f);N_PINS(F),OGATE,P_SPINR(e),XP(H)::QAR1(I),XR(f)
    • S(k);N_GUARD::QAR2(I),XS(k)
    • P(j);N_GUARD::QAB1(I)
  • Tries
    • Try
      • Q(I);
      • Threat
        • QAR1(I)
      • Vars
        • R(f);CHECK,OGATE,P_SPINR(e),XS(F)::P(C),XR(f)
      • Refutation
        • R(e);P_SPINR(f),XQ(I)
    • Try
      • P(H);CHECK
      • Vars
        • R(f);N_GUARD,N_PINS(F),P_SPINR(e)::QAR1(I),XR(f)
      • Refutation
        • R(e);P_SPINR(f),XQ(I)
  • Actual
    • P(B);N_SPINS(F)
    • Threat
      • S(F)
    • Vars
      • R(e);N_GUARD,P_SPINR(f),XP(D)::QAR(I)+P(H)
      • R(f);P_PINS(F),P_SPINR(e),XP(B)::QAB(I),XP(j)
      • R(f);OGATE,P_SPINR(e),XP(H)::QAR1(I),XR(f)
      • S(k);N_GUARD::QAR2(I),XS(k)
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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).