MESON Chess Problem Database

Problem Display
PID: 238158 (1Q2R3/8/7B/8/3N4/2PpP2p/N1nk2np/2R4K w - - 0 1)

Hermanson, Halvar

2nd Comm., Deutsche Schachzeitung, 1957

1Q2R3/8/7B/8/3N4/2PpP2p/N1nk2np/2R4K

#2

9 + 6

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Scxe3
      • 2.Qb2#
    • 1...Sgxe3
      • 2.Qxh2#
  • Tries
    • 1.Rxc2+?
      • 1...Kd1
        • 2.Qb1#
      • 1...Ke1
        • 2.Qb1#
      • 1...dxc2!
    • 1.Qb2?
      • 1...Sxe3
        • 2.Bxe3#
      • 1...Se1
        • 2.e4#
      • 1...Sh4
        • 2.e4#
      • 1...Sf4!
    • 1.e4+?
      • 1...Sce3
        • 2.Qb2#
      • 1...Sge3
        • 2.Qxh2#
      • 1...Sf4!
  • Keys
    • 1.Qxh2!
      • 1...Sxe3
        • 2.Bxe3#
      • 1...Sxd4
        • 2.exd4#
      • 1...Sa1
        • 2.e4#
      • 1...Se1
        • 2.e4#
      • 1...Sa3
        • 2.e4#
      • 1...Sb4
        • 2.e4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • S(a);OGATEB,P_SPINS(a),XP(E)::QAR2(H)
    • S(c);OGATEB,P_SPINS(c),XP(E)::QAR(H),XP(d)
  • Tries
    • Try
      • R(A);CHECK,XS(a)
      • Vars
        • K(b);P-FLIGHT::QAR2(H)
        • K(b);S_FLIGHT::QAR(H)
      • Refutation
        • P(e);XR(A)
    • Try
      • Q(H);P_PINS(a)
      • Vars
        • S(c);OGATE,XP(E)::B(G),XS(c)
        • S(c);N_GUARD::B(G)+P(E)
      • Refutation
        • S(c);
    • Try
      • P(E);CHECK
      • Vars
        • S(a);P_SPINS(a),S_CUTS(c),S_CUTS(c)::QAR2(H)
        • S(c);P_SPINS(c),S_CUTS(a)::QAR(H),XP(d)
      • Refutation
        • S(c);P_SPINS(c)
  • Actual
    • Q(H);P_PINS(c),XP(d)
    • Vars
      • S(a);OGATE,XP(E)::B(G),XS(a)
      • S(a);OGATE,XS(F)::B(G)+P(E),XS(a)
      • S(a);N_GUARD::B(G)+P(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).