MESON Chess Problem Database

Problem Display
PID: 174739 (2R5/1B2r3/Kp6/3Np3/1bNkp3/1p1P2Q1/2b1P3/3n4 w - - 0 1)

Zajic, Helmut

Die Schwalbe, 1957

2R5/1B2r3/Kp6/3Np3/1bNkp3/1p1P2Q1/2b1P3/3n4

#2

8 + 9

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb7
      • 2.Qxe5#
    • 1...Rd7
      • 2.Qxe5#
    • 1...Rf7
      • 2.Qxe5#
    • 1...Rg7
      • 2.Qxe5#
    • 1...Rh7
      • 2.Qxe5#
    • 1...Sb2
      • 2.Qe3#
    • 1...Sf2
      • 2.Qe3#
    • 1...Sc3
      • 2.Qe3#
    • 1...Se3
      • 2.Qxe3#
  • Tries
    • 1.Sxe7?
      • threat
        • 2.Qxe5#
      • 1...Kc3
        • 2.Qxe5#
      • 1...Bd6!
    • 1.e3+?
      • 1...Sxe3
        • 2.Qxe3#
      • 1...Kxd3!
  • Keys
    • 1.Sc7!
      • threat
        • 2.Sb5#
      • 1...Kc3
        • 2.Sb5#
      • 1...Kc5
        • 2.Se6#
      • 1...Rxc7
        • 2.Qxe5#
      • 1...Sc3
        • 2.Qe3#
      • 1...b5
        • 2.Sxb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 8
  • Sets
    • R(i);N_GUARD,XB(G)::QAB1(C),XP(g)
    • R(i);N_GUARD::QAB1(C),XP(g)
    • S(a);N_GUARD::QAB1(C)
    • S(a);N_GUARD::QAB1(C),XS(a)
  • Tries
    • Try
      • S(E);XR(i)
      • Threat
        • QAB1(C),XP(g)
      • Vars
        • K(e);S_FLIGHT::QAB(C),XP(g)
      • Refutation
        • B(d);
    • Try
      • P(A);CHECK
      • Vars
        • S(a);OGATE,XP(A)::QAB1(C),XS(a)
      • Refutation
        • K(e);P-FLIGHT,XP(B)
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • K(e);S_FLIGHT::S(E)
      • K(e);S_FLIGHT::R(H)+S(E),DCHECK
      • R(i);N_GUARD,XS(E)::QAB1(C),XP(g)
      • S(a);N_GUARD,SBLOCK::QAB1(C)
      • P(h);::S(E),XP(h)
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).