MESON Chess Problem Database

Problem Display
PID: 54177 (3R4/2nN4/2pp4/K1Rn2Q1/2pk4/8/4P3/4B3 w - - 0 1)

Hermanson, Halvar

2nd Prize, Chess Life (< 15 pieces Ty.), 1955-1956

3R4/2nN4/2pp4/K1Rn2Q1/2pk4/8/4P3/4B3

#2

7 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Rxc4#
    • 1...Se3
      • 2.Qf4#
    • 1...Sb4
      • 2.Qf4#
    • 1...Sf4
      • 2.Qxf4#
    • 1...Sb6
      • 2.Qf4#
    • 1...Se7
      • 2.Qf4#
    • 1...dxc5
      • 2.Qe5#
  • Tries
    • 1.Bf2+?
      • 1...Ke4
        • 2.Rxc4#
      • 1...Se3
        • 2.Qxe3#
      • 1...Kc3!
    • 1.Rxd5+?
      • 1...Ke4
        • 2.Sf6#
      • 1...cxd5
        • 2.Qf4#
      • 1...Sxd5!
    • 1.Qh4+?
      • 1...Sf4
        • 2.Qxf4#
      • 1...Ke3!
    • 1.Qg4+?
      • 1...Sf4
        • 2.Qxf4#
      • 1...Ke3!
  • Keys
    • 1.Sb6!
      • threat
        • 2.Rxc4#
      • 1...Ke4
        • 2.Rxc4#
      • 1...Kxc5
        • 2.Bf2#
      • 1...Sxb6
        • 2.Qe5#
      • 1...dxc5
        • 2.Qf4#
      • 1...Se3
        • 2.Qe5#
      • 1...Sf4
        • 2.Qe5#
      • 1...c3
        • 2.Rc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • K(b);P-FLIGHT::R(D),XP(a)
    • S(c);N_GUARD::QAR2(E)
    • S(c);N_GUARD::QAR2(E),XS(c)
    • P(e);N_GUARD,XR(D)::QAB1(E)
  • Tries
    • Try
      • B(A);CHECK
      • Vars
        • K(b);P-FLIGHT::R(D),XP(a)
        • S(c);N_GUARD,P_SPINS(c)::QAB1(E),XS(c)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT
    • Try
      • R(D);CHECK,XS(c)
      • Vars
        • K(b);P-FLIGHT::S(F)
        • P(d);SBLOCK,XR(D)::QAR2(E)
      • Refutation
        • S(f);XR(D)
    • Try
      • Q(E);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAR2(E),XS(c)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAR2(E),XS(c)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • S(F);
    • Threat
      • R1(D),XP(a)
    • Vars
      • K(b);P-FLIGHT::R(D),XP(a)
      • K(b);P_SPINS(c),S_FLIGHT,XR(D)::B(A)
      • S(c);P_SPINP(e),XS(F)::QAB1(E)
      • P(e);P_SPINS(c),SBLOCK,XR(D)::QAR2(E)
      • S(c);P_SPINP(e)::QAB1(E)
      • P(a);::R1(D)
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).