Problem Display
PID: 239284 (2R3n1/1r1pkpr1/4P3/2P2P2/8/4p3/1B4Q1/4K3 w - - 0 1)

Rice, John Michael

Sachove umeni (Ceskoslovensky sach), 1996

2R3n1/1r1pkpr1/4P3/2P2P2/8/4p3/1B4Q1/4K3

#2

7 + 7


15148 Sadier Collection 2021

SOLUTION


  • SOUND
  • Sets
    • 1...dxe6
      • 2.Qxb7#
    • 1...d6
      • 2.Qxb7#
    • 1...fxe6
      • 2.Qxg7#
    • 1...f6
      • 2.Qxg7#
  • Tries
    • 1.Qg5+?
      • 1...Sf6
        • 2.Bxf6#
        • 2.Qxf6#
      • 1...f6
        • 2.Qxg7#
      • 1...Rxg5!
    • 1.Qxg7?
      • threat
        • 2.Qf8#
        • 2.Qxf7#
      • 1...Rxb2
        • 2.Qxf7#
      • 1...Sh6
        • 2.Bf6#
        • 2.Qf6#
        • 2.Qf8#
      • 1...dxe6!
    • 1.f6+?
      • 1...Kxe6
        • 2.Qe4#
      • 1...Sxf6!
    • 1.exf7?
      • threat
        • 2.f8Q#
      • 1...Kxf7
        • 2.Qxg7#
      • 1...Rxf7
        • 2.Qe4#
      • 1...d6
        • 2.Qxb7#
      • 1...d5!
  • Keys
    • 1.exd7!
      • threat
        • 2.d8Q#
      • 1...Kxd7
        • 2.Qxb7#
      • 1...Rxd7
        • 2.Qe4#
      • 1...f6
        • 2.Qxg7#

FEATURES


  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • P(c);OGATEB,XP(F)::QAR(C),XR(b)
    • P(c);OGATEB::QAR(C),XR(b)
    • P(e);OGATEB,XP(F)::QAR2(C),XR(f)
    • P(e);OGATEB::QAR2(C),XR(f)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • P(e);OGATEB,P_SPINP(e)::QAR2(C),XR(f)
      • Refutation
        • R(f);XQ(C)
    • Try
      • Q(C);P_PINP(e),XR(f)
      • Threat
        • DUALS(2)
      • Vars
        • R(b);XB(B)::QAR1(C),XP(e)
      • Refutation
        • P(c);XP(F)
    • Try
      • P(E);CHECK
      • Vars
        • K(d);P-FLIGHT,XP(F)::QAR2(C)
      • Refutation
        • S(g);XP(E)
    • Try
      • P(F);XP(e)
      • Threat
        • P=Q
      • Vars
        • K(d);OGATEB,P-FLIGHT,XP(F)::QAR1(C),XR(f)
        • R(f);SBLOCK,XP(F)::QAR(C)
        • P(c);OGATEB::QAR(C),XR(b)
      • Refutation
        • P(c);
  • Actual
    • P(F);XP(c)
    • Threat
      • P=Q
    • Vars
      • K(d);OGATEB,P-FLIGHT,XP(F)::QAR2(C),XR(b)
      • R(b);SBLOCK,XP(F)::QAR(C)
      • P(e);OGATEB::QAR2(C),XR(f)


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).