MESON Chess Problem Database

Problem Display
PID: 170895 (N2N4/1p1r4/3k2r1/3n4/1P2Q3/2R5/B2P3b/1K1R4 w - - 0 1)

Hermanson, Halvar

3rd Prize, Problemisten, 1977

N2N4/1p1r4/3k2r1/3n4/1P2Q3/2R5/B2P3b/1K1R4

#2

9 + 6

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rg1
      • 2.Qe6#
    • 1...Rg2
      • 2.Qe6#
    • 1...Rg3
      • 2.Qe6#
    • 1...Rg4
      • 2.Qe6#
    • 1...Rg5
      • 2.Qe6#
    • 1...Re6
      • 2.Qxe6#
    • 1...Rgg7
      • 2.Qe6#
    • 1...Rg8
      • 2.Qe6#
    • 1...Re7
      • 2.Qxd5#
    • 1...Sxc3+
      • 2.dxc3#
    • 1...Se3
      • 2.dxe3#
    • 1...Sf6
      • 2.Qe6#
    • 1...Sc7
      • 2.Sxb7#
    • 1...Se7
      • 2.Sf7#
    • 1...b5
      • 2.Rc6#
    • 1...b6
      • 2.Rc6#
  • Keys
    • 1.Re3!
      • threat
        • 2.Qxd5#
      • 1...Sc3+
        • 2.dxc3#
      • 1...Sxe3
        • 2.dxe3#
      • 1...Sxb4
        • 2.Qxb4#
      • 1...Re6
        • 2.Qxe6#
      • 1...Be5
        • 2.Qxe5#
      • 1...Rg5
        • 2.Qe6#
      • 1...Sf4
        • 2.Qe5#
      • 1...Sb6
        • 2.Qxg6#
      • 1...Sf6
        • 2.Qe6#
      • 1...Sc7
        • 2.Sxb7#
      • 1...Se7
        • 2.Sf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 9
  • Sets
    • R(d);N_GUARD,P_PINR(B)::QAR1(G)
    • R(d);N_GUARD::QAR1(G)
    • R(d);N_GUARD::QAR1(G),XR(d)
    • R(f);SBLOCK::QAR1(G),XS(b)
    • S(b);CHECK,OGATE,XR(E)::R(B)+P(D),XS(b)
    • S(b);OGATE::R(B)+P(D),XS(b)
    • S(b);S_CUTR(d)::QAR1(G)
    • S(b);S_CUTR(f)::S(I),XP(e)
    • S(b);S_CUTR(f)::S(I)
    • P(e);N_GUARD::R1(E)
  • Actual
    • R(E);
    • Threat
      • QAR1(G),XS(b)
    • Vars
      • S(b);CHECK,OGATE::R(B)+P(D),XS(b)
      • S(b);OGATE,XR(E)::R(B)+P(D),XS(b)
      • S(b);OGATE,XP(F)::QAB(G),XS(b)
      • R(d);N_GUARD::QAR1(G),XR(d)
      • B(a);N_GUARD::QAB1(G),XB(a)
      • R(d);N_GUARD::QAR1(G)
      • S(b);S_CUTB(a)::QAB1(G)
      • S(b);N_GUARD::QAR(G),XR(d)
      • S(b);S_CUTR(d)::QAR1(G)
      • S(b);S_CUTR(f)::S(I),XP(e)
      • S(b);S_CUTR(f)::S(I)
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).