MESON Chess Problem Database

Problem Display
PID: 34312 (8/4p2r/1nN5/1KBk1P2/2rp2N1/Q1p5/8/1B6 w - - 0 1)

Onkoud, Abdelaziz

Die Schwalbe, 2001

8/4p2r/1nN5/1KBk1P2/2rp2N1/Q1p5/8/1B6

#2

7 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rb4+
      • 2.Sxb4#
    • 1...Rxc5+
      • 2.Qxc5#
    • 1...Rh1
      • 2.Sxe7#
    • 1...Rh2
      • 2.Sxe7#
    • 1...Rh3
      • 2.Sxe7#
    • 1...Rh4
      • 2.Sxe7#
    • 1...Rh5
      • 2.Sxe7#
    • 1...Rh6
      • 2.Sxe7#
    • 1...Rh8
      • 2.Sxe7#
    • 1...c2
      • 2.Qf3#
    • 1...e5
      • 2.Sf6#
    • 1...e6
      • 2.Sf6#
  • Tries
    • 1.Qb3?
      • threat
        • 2.Sb4#
      • 1...c2
        • 2.Qf3#
      • 1...d3!
  • Keys
    • 1.Qxc3!
      • threat
        • 2.Qf3#
      • 1...Rb4+
        • 2.Sxb4#
      • 1...Rxc5+
        • 2.Qxc5#
      • 1...Rxc3
        • 2.Sb4#
      • 1...dxc3
        • 2.Se3#
      • 1...d3
        • 2.Qe5#
      • 1...Rh3
        • 2.Sxe7#
      • 1...e5
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • R(b);CHECK,N_GUARD::S(G),XR(b)
    • R(b);CHECK,OGATE,XB(E)::QAR1(B),XR(b)
    • R(g);N_GUARD::S(G),XP(f)
    • P(a);OGATE::QAB(B)
    • P(f);N_GUARD::S(C)
  • Tries
    • Try
      • Q(B);P_PINR(b)
      • Threat
        • S(G)
      • Vars
        • P(a);OGATE::QAB(B)
      • Refutation
        • P(c);
  • Actual
    • Q(B);XP(a)
    • Threat
      • QAB(B)
    • Vars
      • R(b);CHECK,N_GUARD::S(G),XR(b)
      • R(b);CHECK,OGATE,XB(E)::QAR1(B),XR(b)
      • R(b);N_GUARD,XQ(B)::S(G)
      • P(c);N_GUARD,XQ(B)::S(C)
      • P(c);OGATE::QAR1(B)
      • R(g);N_GUARD::S(G),XP(f)
      • P(f);N_GUARD::S(C)
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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).