MESON Chess Problem Database

Problem Display
PID: 238069 (5Q2/8/1RK1p3/1NnP4/r1k1p3/q1p1R3/P7/2N2b2 w - - 0 1)

Hermanson, Halvar

Source?, 0000

5Q2/8/1RK1p3/1NnP4/r1k1p3/q1p1R3/P7/2N2b2

#2

8 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc1
      • 2.Qxc5#
    • 1...Qb2
      • 2.Qxc5#
    • 1...Qxa2
      • 2.Qxc5#
    • 1...Qb3
      • 2.Qxc5#
    • 1...Rb4
      • 2.Qxc5#
    • 1...Sb3
      • 2.Rxc3#
    • 1...Sd3
      • 2.Rxe4#
    • 1...Sa6
      • 2.Rxe4#
    • 1...Sb7
      • 2.Rxe4#
    • 1...Sd7
      • 2.Rxe4#
  • Tries
    • 1.Sxa3+?
      • 1...Rxa3
        • 2.Qxc5#
      • 1...Kd4!
    • 1.Rxc3+?
      • 1...Qxc3
        • 2.Qxc5#
      • 1...Kb4!
    • 1.Qxf1+?
      • 1...Sd3
        • 2.Rxe4#
      • 1...Kb4!
  • Keys
    • 1.Sb3!
      • threat
        • 2.Sd6#
      • 1...Kb4
        • 2.Qxc5#
      • 1...Qxb3
        • 2.Qxc5#
      • 1...Sxb3
        • 2.Rxc3#
      • 1...Sd3
        • 2.Rxe4#
      • 1...Sa6
        • 2.Rxc3#
      • 1...Sb7
        • 2.Rxc3#
      • 1...Sd7
        • 2.Rxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • Q(b);N_GUARD,XS(A)::QAR1(H),XS(g)
    • Q(b);N_GUARD::QAR1(H),XS(g)
    • Q(b);N_GUARD,XP(B)::QAR1(H),XS(g)
    • R(d);S_CUTQ(b)::QAR1(H),XS(g)
    • S(g);S_CUTQ(b)::R1(C),XP(c)
    • S(g);N_GUARD::R(C),XP(f)
  • Tries
    • Try
      • S(D);CHECK,XQ(b)
      • Vars
        • R(d);XS(D)::QAR1(H),XS(g)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • R(C);CHECK,XP(c)
      • Vars
        • Q(b);XR(C)::QAR1(H),XS(g)
      • Refutation
        • K(e);P-FLIGHT,P_SPINS(g)
    • Try
      • Q(H);CHECK,XB(a)
      • Vars
        • S(g);P_SPINS(g)::R(C),XP(f)
      • Refutation
        • K(e);P-FLIGHT
  • Actual
    • S(A);
    • Threat
      • S(D)
    • Vars
      • K(e);P-FLIGHT,P_SPINS(g)::QAB1(H),XS(g)
      • Q(b);N_GUARD,XS(A)::QAR1(H),XS(g)
      • S(g);XS(A)::R1(C),XP(c)
      • S(g);N_GUARD,SBLOCK::R(C),XP(f)
      • S(g);::R1(C),XP(c)
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).