Problem Display
PID: 160327 (8/8/8/4pp1K/Q2P1k2/3R4/8/8 w - - 0 1)

Abdullayev, Elmar

Problemist Ukraini, 2016

8/8/8/4pp1K/Q2P1k2/3R4/8/8

#2

4 + 3


15148 Sadier Collection 2017

SOLUTION


  • SOUND
  • Sets
    • 1...exd4
      • 2.Qxd4#
  • Tries
    • 1.Qd1?
      • threat
        • 2.Qf3#
      • 1...Ke4
        • 2.Qf3#
      • 1...e4
        • 2.Qf1#
      • 1...exd4!
    • 1.Qc6?
      • threat
        • 2.Rf3#
        • 2.Qf3#
      • 1...e4
        • 2.Qd6#
        • 2.Qh6#
        • 2.Qc7#
      • 1...exd4!
    • 1.Qd7?
      • 1...exd4
        • 2.Qxd4#
      • 1...e4
        • 2.Qd6#
        • 2.Qc7#
      • 1...Ke4!
    • 1.Qa1?
      • 1...exd4
        • 2.Qxd4#
      • 1...e4
        • 2.Qf1#
      • 1...Ke4!
    • 1.Qb4?
      • 1...exd4
        • 2.Qxd4#
      • 1...e4
        • 2.Qd6#
        • 2.Qb8#
      • 1...Ke4!
    • 1.Qa7?
      • 1...exd4
        • 2.Qxd4#
      • 1...e4
        • 2.Qb8#
        • 2.Qc7#
      • 1...Ke4!
    • 1.Qa8?
      • threat
        • 2.Rf3#
        • 2.Qf3#
      • 1...e4
        • 2.Qb8#
      • 1...exd4!
  • Keys
    • 1.Qc4!
      • 1...Ke4
        • 2.d5#
      • 1...exd4
        • 2.Qxd4#
      • 1...e4
        • 2.Qc7#

FEATURES


  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(b);OGATE,P_SPINP(b),XP(C)::QAR2(B),XP(b)
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • K(a);P-FLIGHT::QAB1(B)
        • P(b);SBLOCK::QAR(B)
      • Refutation
        • P(b);XP(C)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Refutation
        • P(b);XP(C)
    • Try
      • Q(B);
      • Vars
        • P(b);OGATE,XP(C)::QAR2(B),XP(b)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);
      • Vars
        • P(b);OGATE,XP(C)::QAR2(B),XP(b)
        • P(b);SBLOCK::QAR(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);
      • Vars
        • P(b);OGATE,P_SPINP(b),XP(C)::QAR2(B),XP(b)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);
      • Vars
        • P(b);OGATE,XP(C)::QAR2(B),XP(b)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);OGATEB,SBLOCK::QAB(B)
      • Refutation
        • P(b);XP(C)
  • Actual
    • Q(B);
    • Vars
      • K(a);P-FLIGHT::QAR(B)+P(C)
      • P(b);OGATE,P_SPINP(b),XP(C)::QAR2(B),XP(b)
      • P(b);OGATEB,SBLOCK::QAB(B)


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).