MESON Chess Problem Database

Problem Display
PID: 236507 (b7/q1NQ4/pb2P3/5pBK/4kP2/4N2R/6P1/1n6 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Rochade Europa, 2006

b7/q1NQ4/pb2P3/5pBK/4kP2/4N2R/6P1/1n6

#2

9 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bd5
      • 2.Qxd5#
  • Tries
    • 1.Sf1?
      • threat
        • 2.Qd3#
      • 1...Bd5
        • 2.Qxd5#
      • 1...Be3
        • 2.Sg3#
      • 1...Bd4!
    • 1.Sc4?
      • threat
        • 2.Qd3#
      • 1...Bd5
        • 2.Qxd5#
      • 1...Bd4
        • 2.Sd6#
      • 1...Be3!
    • 1.Sg4?
      • threat
        • 2.Sf6#
        • 2.Qd3#
      • 1...fxg4
        • 2.Qd3#
      • 1...Bd5
        • 2.Qxd5#
      • 1...Be3
        • 2.Sf6#
      • 1...Bd4!
    • 1.Qa4+?
      • 1...Bd4
        • 2.Qc2#
      • 1...Kd3!
  • Keys
    • 1.Sxf5!
      • threat
        • 2.Qd3#
      • 1...Kxf5
        • 2.Qh7#
      • 1...Bd4
        • 2.Sd6#
      • 1...Be3
        • 2.Sg3#
      • 1...Bd5
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • B(g);N_GUARD::QAB1(I),XB(g)
  • Tries
    • Try
      • S(B);
      • Threat
        • QAB1(I)
      • Vars
        • B(g);N_GUARD::QAB1(I),XB(g)
        • B(e);SBLOCK::S(B)
      • Refutation
        • B(e);
    • Try
      • S(B);
      • Threat
        • QAB1(I)
      • Vars
        • B(g);N_GUARD::QAB1(I),XB(g)
        • B(e);SBLOCK::S(B)
      • Refutation
        • B(e);
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);XS(B)::QAB1(I)
        • B(g);N_GUARD::QAB1(I),XB(g)
        • B(e);::S(B)
      • Refutation
        • B(e);
    • Try
      • Q(I);CHECK
      • Vars
        • B(e);P_SPINB(e),SBLOCK::QAB(I)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • S(B);XP(c)
    • Threat
      • QAB1(I)
    • Vars
      • K(b);OGATEB,S_FLIGHT,XS(B)::QAB(I)
      • B(e);SBLOCK::S(B)
      • B(g);N_GUARD::QAB1(I),XB(g)
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).