Problem Display
PID: 110840 (4R1B1/8/1pp5/3NP2r/P1PkP1R1/Q7/2p2P2/1bK2n2 w - - 0 1)

Pituk, Alexander

Sachove umeni (Ceskoslovensky sach), 1969

4R1B1/8/1pp5/3NP2r/P1PkP1R1/Q7/2p2P2/1bK2n2

#2

11 + 7


6490 yacpdb 2009

SOLUTION


  • SOUND
  • Sets
    • 1...Kxc4
      • 2.Qc3#
    • 1...Rf5
      • 2.exf5#
    • 1...cxd5
      • 2.exd5#
    • 1...c5
      • 2.Qc3#
  • Tries
    • 1.Sc3?
      • threat
        • 2.Se2#
      • 1...Kd3
        • 2.Rd8#
      • 1...Sg3!
    • 1.Sb4?
      • threat
        • 2.Sxc6#
      • 1...Kc5
        • 2.Sxc2#
      • 1...c5
        • 2.Sc6#
        • 2.Qb2#
        • 2.Qa1#
        • 2.Qd3#
      • 1...Rh6!
    • 1.Se7?
      • threat
        • 2.Sxc6#
      • 1...Rh6
        • 2.Sf5#
      • 1...c5
        • 2.Sc6#
      • 1...Kxe5!
    • 1.Qe3+?
      • 1...Kxc4
        • 2.Qc3#
      • 1...Sxe3!
    • 1.c5?
      • threat
        • 2.Qc3#
      • 1...Kc4
        • 2.Qc3#
      • 1...cxd5
        • 2.exd5#
      • 1...Rh3!
  • Keys
    • 1.Sf4!
      • threat
        • 2.Se2#
      • 1...Kxe4
        • 2.Qd3#
      • 1...Sg3
        • 2.Qe3#

FEATURES


  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • K(d);P-FLIGHT,XP(E)::QAR1(C)
    • R(e);OGATE::R(G)+P(F),XR(e)
    • P(g);OGATE,XS(H)::R(G)+P(F),XP(g)
    • P(g);SBLOCK::QAB1(C)
  • Tries
    • Try
      • S(H);
      • Threat
        • S(H)
      • Vars
        • K(d);P-FLIGHT::R(J)
      • Refutation
        • S(b);
    • Try
      • S(H);
      • Threat
        • S(H),XP(g)
      • Vars
        • K(d);S_FLIGHT::QAB(C)+S(H),XP(c)
      • Refutation
        • R(e);
    • Try
      • S(H);
      • Threat
        • S(H),XP(g)
      • Vars
        • R(e);N_GUARD::S(H)
        • P(g);::S(H)
      • Refutation
        • K(d);S_FLIGHT,XP(I)
    • Try
      • Q(C);CHECK
      • Vars
        • K(d);P-FLIGHT,XP(E)::QAR1(C)
      • Refutation
        • S(b);XQ(C)
    • Try
      • P(E);
      • Threat
        • QAB1(C)
      • Vars
        • K(d);P-FLIGHT::QAR1(C)
        • P(g);OGATE,XS(H)::R(G)+P(F),XP(g)
      • Refutation
        • R(e);
  • Actual
    • S(H);
    • Threat
      • S(H)
    • Vars
      • K(d);P-FLIGHT,XP(F)::QAB1(C)
      • S(b);N_GUARD::QAB1(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).