MESON Chess Problem Database

Problem Display
PID: 278013 (b2bQ3/5r2/1p4R1/2N5/2R5/5k1P/6N1/1K1nB2n w - - 0 1)

Hermanson, Halvar

To Mat, 1952

b2bQ3/5r2/1p4R1/2N5/2R5/5k1P/6N1/1K1nB2n

#2

8 + 7

15601 Albrecht-Leiss-Degener Collection 2024

SOLUTION

  • SOUND
  • Sets
    • 1...Rf4
      • 2.Rxf4#
    • 1...Rf6
      • 2.Sh4#
    • 1...Ra7
      • 2.Rf4#
    • 1...Rb7
      • 2.Rf4#
      • 2.Qe4#
    • 1...Rc7
      • 2.Rf4#
    • 1...Rd7
      • 2.Rf4#
    • 1...Rg7
      • 2.Rf4#
    • 1...Rh7
      • 2.Rf4#
    • 1...Be4+
      • 2.Qxe4#
    • 1...Bh4
      • 2.Sxh4#
    • 1...Bf6
      • 2.Rf4#
    • 1...Bc7
      • 2.Sh4#
    • 1...Sb2
      • 2.Qe3#
    • 1...Sdf2
      • 2.Qe3#
    • 1...Sc3+
      • 2.Rxc3#
    • 1...Se3
      • 2.Qxe3#
    • 1...Sg3
      • 2.Rxg3#
  • Tries
    • 1.Rc3+?
      • 1...Se3
        • 2.Rxe3#
        • 2.Qxe3#
      • 1...Sxc3+!
    • 1.Qxf7+?
      • 1...Ke2
        • 2.Rc2#
      • 1...Bf6!
  • Keys
    • 1.Rc2!
      • threat
        • 2.Qe2#
      • 1...Sc3+
        • 2.Rxc3#
      • 1...Re7
        • 2.Rf6#
      • 1...Be4
        • 2.Qxe4#
      • 1...Be7
        • 2.Qxa8#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sg3
        • 2.Rxg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 12
  • Sets
    • R(e);N_GUARD::R1(E),XR(e)
    • R(e);S_CUTB(g)::S(C)
    • R(e);N_GUARD::R1(E)
    • B(f);CHECK,N_GUARD::QAB1(H),XB(f)
    • B(g);N_GUARD::S(C),XB(g)
    • B(g);S_CUTR(e)::R1(E)
    • B(g);N_GUARD::S(C)
    • S(a);N_GUARD::QAR1(H)
    • S(a);CHECK,N_GUARD::R(E),XS(a)
    • S(a);N_GUARD::QAR1(H),XS(a)
    • S(b);N_GUARD::R1(G),XS(b)
  • Tries
    • Try
      • R(E);CHECK
      • Refutation
        • S(a);CHECK,XR(E)
    • Try
      • Q(H);CHECK,XR(e)
      • Vars
        • K(c);S_CUTB(g),S_FLIGHT::R(E)
      • Refutation
        • B(g);P_SPINB(g)
  • Actual
    • R(E);
    • Threat
      • QAB1(H)
    • Vars
      • S(a);CHECK,N_GUARD::R(E),XS(a)
      • R(e);N_GUARD,S_CUTB(g)::R(G)
      • B(f);N_GUARD,P_PINR(E)::QAB1(H),XB(f)
      • B(g);OGATE::QAB(H),XB(f)
      • S(a);N_GUARD::QAR1(H),XS(a)
      • S(b);N_GUARD::R1(G),XS(b)
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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).