MESON Chess Problem Database

Problem Display
PID: 238752 (8/3p1Q2/1p1pP3/2Pk4/pR1N2b1/1P4K1/8/4R3 w - - 0 1)

Hermanson, Halvar

L'Italia Scacchistica, 1950

8/3p1Q2/1p1pP3/2Pk4/pR1N2b1/1P4K1/8/4R3

#2

8 + 6

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bd1
      • 2.Qf5#
    • 1...Be2
      • 2.Qf5#
    • 1...Bf3
      • 2.Qf5#
    • 1...Bf5
      • 2.Qxf5#
    • 1...Bh5
      • 2.Qxh5#
      • 2.Qf5#
    • 1...dxc5
      • 2.Qxd7#
  • Tries
    • 1.Qh5+?
      • 1...Bf5
        • 2.Qxf5#
      • 1...Bxh5!
    • 1.Qf3+?
      • 1...Kxc5
        • 2.Rc4#
      • 1...Bxf3!
    • 1.Qxd7?
      • threat
        • 2.Qc6#
        • 2.Qxd6#
      • 1...Kxc5
        • 2.Qb5#
      • 1...bxc5
        • 2.Qc6#
        • 2.Qb7#
      • 1...Be2!
    • 1.exd7+?
      • 1...Kxc5
        • 2.Rc4#
        • 2.Qc4#
      • 1...Be6!
    • 1.e7+?
      • 1...Kxc5
        • 2.Rc4#
        • 2.Qc4#
      • 1...Be6!
  • Keys
    • 1.Qf4!
      • threat
        • 2.Qxd6#
      • 1...Kxc5
        • 2.Rb5#
      • 1...bxc5
        • 2.Qe4#
      • 1...dxc5
        • 2.Qe5#
      • 1...Be2
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • B(b);N_GUARD::QAR2(H)
    • B(b);N_GUARD::QAR2(H),XB(b)
    • P(e);OGATEB,SBLOCK,XP(F)::QAR2(H),XP(f)
  • Tries
    • Try
      • Q(H);CHECK
      • Vars
        • B(b);N_GUARD,P_SPINB(b)::QAR2(H),XB(b)
      • Refutation
        • B(b);XQ(H)
    • Try
      • Q(H);CHECK
      • Vars
        • K(c);P-FLIGHT,XP(F)::R1(D)
      • Refutation
        • B(b);XQ(H)
    • Try
      • Q(H);P_PINP(e),XP(f)
      • Threat
        • DUALS(2)
      • Vars
        • K(c);N_SPINP(e),OGATEB,P-FLIGHT,XP(F)::QAR1(H)
      • Refutation
        • B(b);
    • Try
      • P(G);CHECK,XP(f)
      • Refutation
        • B(b);P_SPINB(b)
    • Try
      • P(G);CHECK
      • Refutation
        • B(b);P_SPINB(b)
  • Actual
    • Q(H);
    • Threat
      • QAR1(H),XP(e)
    • Vars
      • K(c);OGATEB,P-FLIGHT,XP(F)::R1(D)
      • P(d);SBLOCK,XP(F)::QAB1(H)
      • P(e);N_GUARD,SBLOCK,XP(F)::QAR1(H)
      • B(b);N_GUARD::QAR2(H)
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).