MESON Chess Problem Database

Problem Display
PID: 139935 (B4R2/rr3p2/p7/2n5/4qNpP/2N2kB1/5P1K/8 w - - 0 1)

Feenstra Kuiper, Pieter

Het Half Pin Thema (II), 1947

B4R2/rr3p2/p7/2n5/4qNpP/2N2kB1/5P1K/8

#2

8 + 8

SOLUTION

  • SOUND
  • Tries
    • 1.Sh3?
      • threat
        • 2.Sg1#
        • 2.Sg5#
      • 1...Qb1
        • 2.Sg5#
      • 1...Qd5
        • 2.Sg1#
      • 1...Qf5
        • 2.Sg1#
      • 1...Qg6
        • 2.Sg1#
      • 1...Qe1
        • 2.Sg5#
        • 2.Rxf7#
      • 1...Qe3
        • 2.Sg1#
      • 1...Qf4
        • 2.Sg1#
      • 1...Qe5
        • 2.Sg1#
      • 1...Qe7
        • 2.Sg1#
      • 1...Rb1
        • 2.Sg5#
      • 1...Se6
        • 2.Sg1#
      • 1...gxh3!
  • Keys
    • 1.Sfe2!
      • threat
        • 2.Sg1#
      • 1...Qxe2
        • 2.Rxf7#
      • 1...Qb1
        • 2.Sd4#
      • 1...Rb1
        • 2.Sd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(E);P_PINP(h)
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);P_SPINR(g)::S(E)
        • Q(b);::S(E)
        • Q(b);N_SPINP(h),P_SPINR(g)::S(E)
        • Q(b);N_SPINP(h),P_PINB(D),P_SPINR(g)::S(E)
        • Q(b);P_PINB(D),P_SPINR(g)::S(E)
        • R(g);P_SPINQ(b)::S(E)
        • S(d);::S(E)
      • Refutation
        • P(c);XS(E)
  • Actual
    • S(E);P_PINP(h)
    • Threat
      • S(E)
    • Vars
      • Q(b);N_GUARD,P_PINP(A),P_SPINR(g),XS(E)::R(H),XP(h)
      • Q(b);N_GUARD,P_SPINR(g)::S(E)
      • R(g);P_SPINQ(b)::S(E)
HTML5 logo

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).