Problem Display
PID: 266483 (5R2/8/NPp5/2Ppp3/Ppk5/1p2p3/1p2K3/bB1N3Q w - - 0 1)

Kuligin, Nikolai Volodimirovich

Mat, 1980

5R2/8/NPp5/2Ppp3/Ppk5/1p2p3/1p2K3/bB1N3Q

#2

9 + 9


SOLUTION


  • SOUND
  • Sets
    • 1...d4
      • 2.Bd3#
  • Tries
    • 1.Kxe3?
      • threat
        • 2.Bd3#
        • 2.Qf1#
      • 1...e4
        • 2.Qf1#
      • 1...d4+!
    • 1.Rd8?
      • 1...Kd4
        • 2.Qe4#
      • 1...d4
        • 2.Bd3#
      • 1...e4!
    • 1.Qe4+?
      • 1...d4
        • 2.Bd3#
      • 1...dxe4!
    • 1.Qe1?
      • threat
        • 2.Qxb4#
      • 1...Kd4
        • 2.Qxb4#
      • 1...d4!
    • 1.Qf1?
      • threat
        • 2.Kxe3#
      • 1...d4
        • 2.Qf7#
      • 1...Kd4!
    • 1.Qh7?
      • threat
        • 2.Qd3#
      • 1...Kd4
        • 2.Qd3#
      • 1...d4
        • 2.Qg8#
        • 2.Qf7#
      • 1...e4!
  • Keys
    • 1.Qh8!
      • 1...Kd4
        • 2.Rf4#
      • 1...e4
        • 2.Sxe3#
      • 1...d4
        • 2.Qg8#

FEATURES


  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(g);SBLOCK::B(A)
  • Tries
    • Try
      • K(D);P-FLIGHT,XP(d)
      • Threat
        • DUALS(2)
      • Vars
        • P(h);::QAB(C)
      • Refutation
        • P(g);CHECK
    • Try
      • R(I);
      • Vars
        • K(f);P-FLIGHT,P_SPINP(g)::QAR1(C)
        • P(g);::B(A)
      • Refutation
        • P(h);
    • Try
      • Q(C);CHECK
      • Vars
        • P(g);P_SPINP(g)::B(A)
      • Refutation
        • P(g);XQ(C)
    • Try
      • Q(C);
      • Threat
        • QAR1(C),XP(e)
      • Vars
        • K(f);P-FLIGHT::QAR2(C),XP(e)
      • Refutation
        • P(g);
    • Try
      • Q(C);
      • Threat
        • QAB(C)+K(D),XP(d)
      • Vars
        • P(g);OGATEB,SBLOCK::QAB(C)
      • Refutation
        • K(f);P-FLIGHT
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • K(f);P-FLIGHT::QAR1(C)
      • Refutation
        • P(h);
  • Actual
    • Q(C);
    • Vars
      • K(f);P-FLIGHT,P_SPINP(h),S_CUTP(g)::R(I)
      • P(h);::S(B),XP(d)
      • P(g);OGATEB,SBLOCK::QAB(C)


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).