MESON Chess Problem Database

Problem Display
PID: 273302 (rNNn4/3Pq1p1/p7/rk2BQ1R/pPp3p1/P6b/8/1R2K3 w - - 0 1)

Hermanson, Halvar

5th HM., Schakend Nederland, 1978

rNNn4/3Pq1p1/p7/rk2BQ1R/pPp3p1/P6b/8/1R2K3

#2

10 + 11

15601 Albrecht-Leiss-Degener Collection 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb4+
      • 2.Bc3#
    • 1...Qh4+
      • 2.Bg3#
    • 1...Qd6
      • 2.Bxd6#
    • 1...Qf6
      • 2.Bxf6#
    • 1...Qxe5+
      • 2.Qxe5#
    • 1...c3
      • 2.Qd3#
  • Keys
    • 1.Qf2!
      • threat
        • 2.Qb6#
      • 1...Qxb4+
        • 2.Rxb4#
      • 1...Qxe5+
        • 2.Rxe5#
      • 1...Rxb8
        • 2.Sa7#
      • 1...c3
        • 2.Qe2#
      • 1...Qc5
        • 2.Qxc5#
        • 2.bxc5#
      • 1...Qh4
        • 2.Sd6#
      • 1...Qd6
        • 2.Sxd6#
      • 1...Qf6
        • 2.Qc5#
      • 1...Qe6
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 6
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(h);CHECK,N_PINB(E),P_SPINQ(h),XP(D)::QAR(F)+B(E)
    • Q(h);CHECK,N_PINB(E)::QAR(F)+B(E)
    • Q(h);N_PINB(E)::QAR(F)+B(E),XQ(h)
    • Q(h);CHECK,OGATE,P_SPINQ(h),XB(E)::QAR(F),XQ(h)
    • P(c);OGATEB::QAB(F)
  • Actual
    • Q(F);
    • Threat
      • QAR1(F)
    • Vars
      • Q(h);CHECK,N_PINB(E),OGATE,P_SPINQ(h),XP(D)::R1(A),XQ(h)
      • Q(h);CHECK,OGATE,P_SPINQ(h),XB(E)::R(G),XQ(h)
      • R(j);N_GUARD,XS(I)::S(J)
      • P(c);OGATEB::QAB(F)
      • Q(h);N_GUARD,N_PINB(E),P_PINQ(F)::S(J)
      • Q(h);N_GUARD,N_PINB(E)::S(J),XQ(h)
      • Q(h);N_GUARD,N_PINB(E)::QAR1(F)
      • Q(h);N_GUARD::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).