MESON Chess Problem Database

Problem Display
PID: 11819 (8/1P1pp3/pK1P1bbN/Rp2k2n/2P3Q1/BN2P3/1q6/3n4 w - - 0 1)

Hermanson, Halvar

3rd Comm., KeyStip 06. Ty., 1972

8/1P1pp3/pK1P1bbN/Rp2k2n/2P3Q1/BN2P3/1q6/3n4

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qd4+
      • 2.exd4#
    • 1...Bb1
      • 2.Sf7#
    • 1...Bc2
      • 2.Sf7#
    • 1...Bd3
      • 2.Sf7#
    • 1...Be4
      • 2.Sf7#
    • 1...Bf5
      • 2.Qxf5#
    • 1...Bf7
      • 2.Sxf7#
      • 2.Qf5#
    • 1...Bh7
      • 2.Sf7#
    • 1...Be8
      • 2.Qf5#
  • Tries
    • 1.Qd4+?
      • 1...Ke6
        • 2.Sc5#
        • 2.Qd5#
      • 1...Qxd4+!
    • 1.Qf4+?
      • 1...Ke6
        • 2.Sc5#
      • 1...Sxf4!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Sxd7#
      • 1...bxc4+
        • 2.Sb3#
      • 1...Kxd6
        • 2.b8Q#
        • 2.b8B#
      • 1...Qxa3
        • 2.Qd4#
      • 1...Qd4
        • 2.Qxd4#
      • 1...Qb4
        • 2.Qd4#
      • 1...Bf5
        • 2.Sf7#
      • 1...Be8
        • 2.Sd3#
      • 1...Sf4
        • 2.Qxf4#
      • 1...b4
        • 2.Se4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 5
    • REMOVED MATES = 5
  • Sets
    • Q(b);CHECK,OGATE::P(C),XQ(b)
    • B(h);N_GUARD::S(I)
    • B(h);N_GUARD::QAR1(E),XB(h)
    • B(h);N_GUARD::QAR1(E)
  • Tries
    • Try
      • Q(E);CHECK
      • Refutation
        • Q(b);CHECK,XQ(E)
    • Try
      • Q(E);CHECK
      • Vars
        • K(d);N_SPINP(c),P-FLIGHT::S(B)
      • Refutation
        • S(e);XQ(E)
  • Actual
    • S(B);N_PINP(c)
    • Threat
      • S(B),XP(i)
    • Vars
      • P(c);CHECK,XP(D)::R(F)+S(B)
      • K(d);S_FLIGHT,XP(H)::P=Q
      • Q(b);N_GUARD,XB(A)::QAB1(E)
      • Q(b);N_GUARD,P_PINS(B)::QAB1(E),XQ(b)
      • Q(b);N_GUARD::QAB1(E)
      • B(h);N_GUARD::S(I)
      • B(h);N_GUARD::S(B)
      • S(e);N_GUARD::QAB1(E),XS(e)
      • P(c);::R(F)+S(B)
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).