MESON Chess Problem Database

Problem Display
PID: 225171 (8/2p5/R7/R1NkP3/2p2Pn1/NnP5/Q2P4/1K4B1 w - - 0 1)

ten Cate, Pieter

US Problem Bulletin, 1967

8/2p5/R7/R1NkP3/2p2Pn1/NnP5/Q2P4/1K4B1

#2

11 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Sa1
      • 2.Qxc4#
    • 1...Sc1
      • 2.Qxc4#
    • 1...Sxd2+
      • 2.Qxd2#
    • 1...Sd4
      • 2.Qxc4#
    • 1...Sxc5
      • 2.Qxc4#
  • Tries
    • 1.Sb5?
      • threat
        • 2.Sxc7#
      • 1...Sxd2+
        • 2.Qxd2#
      • 1...c6
        • 2.Sc7#
      • 1...Sxc5!
  • Keys
    • 1.Sxc4!
      • 1...Sxd2+
        • 2.Sxd2#
      • 1...Kxc4
        • 2.Qxb3#
      • 1...Sxa5
        • 2.Sxa5#
      • 1...Sxc5
        • 2.Sd6#
      • 1...Sxe5
        • 2.Se3#
      • 1...Sa1
        • 2.Se3#
      • 1...Sc1
        • 2.Se3#
      • 1...Sd4
        • 2.Se3#
      • 1...Sf2
        • 2.Se3#
      • 1...Sh2
        • 2.Se3#
      • 1...Se3
        • 2.Sxe3#
      • 1...Sf6
        • 2.Se3#
      • 1...Sh6
        • 2.Se3#
      • 1...c6
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 5
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • S(a);OGATE,P_SPINP(b)::QAB1(C),XP(b)
    • S(a);CHECK,OGATE,P_SPINP(b),XP(D)::QAR(C),XS(a)
    • S(a);OGATE,P_SPINP(b),P_SPINS(a),XS(I)::QAB1(C),XP(b)
  • Tries
    • Try
      • S(E);
      • Threat
        • S(E),XP(e)
      • Vars
        • S(a);CHECK,OGATE,P_SPINP(b),XP(D)::QAR(C),XS(a)
        • P(e);::S(E)
      • Refutation
        • S(a);P_SPINP(b),XS(I)
  • Actual
    • S(E);XP(b)
    • Vars
      • S(a);CHECK,XP(D)::QAB(C)+S(E),XS(a)
      • K(d);OGATEB,P_SPINS(a),S_FLIGHT,XS(E)::QAB1(C),XS(a)
      • S(a);XR(H)::QAB(C)+S(E),XS(a)
      • S(a);P_SPINS(a),XS(I)::QAB(C)+S(E)
      • S(c);N_GUARD,XP(J)::S(E)
      • S(a);::QAB(C)+S(E),DCHECK
      • S(c);N_GUARD::S(E)
      • S(c);N_GUARD::S(E),XS(c)
      • P(e);N_GUARD,SBLOCK::S(E)
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).