MESON Chess Problem Database

Problem Display
PID: 92028 (1NR5/7b/3p3r/p1NPp1R1/Kp1kp3/1Bp4p/2P5/4Q1b1 w - - 0 1)

Schonholzer, Andreas

Deutsche Schachblatter, 1986

1NR5/7b/3p3r/p1NPp1R1/Kp1kp3/1Bp4p/2P5/4Q1b1

#2

9 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rh4
      • 2.Se6#
    • 1...Rh5
      • 2.Se6#
    • 1...Re6
      • 2.Sxe6#
    • 1...Rg6
      • 2.Qxe4#
    • 1...Bg6
      • 2.Se6#
    • 1...Bg8
      • 2.Qxe4#
  • Tries
    • 1.Sxe4?
      • threat
        • 2.Sc6#
      • 1...Bxe4
        • 2.Qxg1#
      • 1...Be3!
    • 1.Rg3?
      • threat
        • 2.Qd1#
      • 1...Be3
        • 2.Qxe3#
      • 1...e3!
  • Keys
    • 1.Rg6!
      • threat
        • 2.Se6#
        • 2.Qxe4#
      • 1...Rxg6
        • 2.Qxe4#
      • 1...Bxg6
        • 2.Se6#
      • 1...dxc5
        • 2.Sc6#
      • 1...Rh4
        • 2.Se6#
      • 1...Be3
        • 2.Se6#
      • 1...Bg8
        • 2.Qxe4#
      • 1...e3
        • 2.Qd1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • R(j);N_GUARD::S(E)
    • R(j);N_GUARD::S(E),XR(j)
    • R(j);S_CUTB(k)::QAR1(A),XP(f)
    • B(k);S_CUTR(j)::S(E)
    • B(k);N_GUARD::QAR1(A),XP(f)
  • Tries
    • Try
      • S(E);XP(f)
      • Threat
        • S(H)
      • Vars
        • B(k);SBLOCK,XS(E)::QAB(A),XB(a)
      • Refutation
        • B(a);
    • Try
      • R(G);
      • Threat
        • QAR(A)
      • Vars
        • B(a);N_GUARD::QAB1(A),XB(a)
      • Refutation
        • P(f);
  • Actual
    • R(G);
    • Threat
      • DUALS(2)
    • Vars
      • R(j);XR(G)::QAR1(A),XP(f)
      • B(k);XR(G)::S(E)
      • P(i);SBLOCK,XS(E)::S(H)
      • R(j);::S(E)
      • B(a);::S(E)
      • B(k);::QAR1(A),XP(f)
      • P(f);SBLOCK::QAR(A)
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).