Problem Display
PID: 64224 (3b4/KRpr4/2kNP3/P2pP3/1P3Prq/2pp2Np/2B1R3/3b3Q w - - 0 1)

Pituk, Alexander

3rd Prize, Szachy, 1977

3b4/KRpr4/2kNP3/P2pP3/1P3Prq/2pp2Np/2B1R3/3b3Q

#2

12 + 11


3750 FIDE Album (1977-1979) 1984

SOLUTION


  • SOUND
  • Sets
    • 1...Bxe2
      • 2.Ba4#
  • Tries
    • 1.Sge4?
      • threat
        • 2.b5#
      • 1...dxe4
        • 2.Qxe4#
      • 1...d4
        • 2.Sg3#
      • 1...Qf2+!
    • 1.Sde4?
      • threat
        • 2.b5#
      • 1...d4
        • 2.Sd6#
      • 1...dxe4!
    • 1.Re4?
      • threat
        • 2.Rc4#
      • 1...dxe4
        • 2.Qxe4#
      • 1...d4
        • 2.Re2#
      • 1...Bf3
        • 2.Ba4#
      • 1...Rxf4!
    • 1.Rb5?
      • threat
        • 2.Rc5#
        • 2.Qxd5#
      • 1...Rxd6
        • 2.Rc5#
      • 1...cxd6+!
    • 1.Qxd1?
      • threat
        • 2.Ba4#
      • 1...d4
        • 2.Qh1#
      • 1...dxc2!
  • Keys
    • 1.Qg1!
      • threat
        • 2.Qc5#
        • 2.b5#
      • 1...cxd6
        • 2.b5#
      • 1...d4
        • 2.Qh1#

FEATURES


  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • B(a);N_GUARD,XR(C)::B(B)
  • Tries
    • Try
      • S(D);N_PINP(g)
      • Threat
        • P(E)
      • Vars
        • P(g);OGATE,P_SPINP(g),XS(D)::QAB(A),XP(g)
        • P(g);::QAB(A)+S(D)
      • Refutation
        • Q(f);CHECK
    • Try
      • S(I);N_PINP(g)
      • Threat
        • P(E)
      • Vars
        • P(g);::QAB(A)+S(I)
      • Refutation
        • P(g);P_SPINP(g),XS(I)
    • Try
      • R(C);N_PINP(g)
      • Threat
        • R(C)
      • Vars
        • P(g);OGATE,P_SPINP(g),XR(C)::QAB(A),XP(g)
        • P(g);OGATEB::QAB(A)+R(C)
        • B(a);N_GUARD::B(B)
      • Refutation
        • R(e);XP(F)
    • Try
      • R(L);
      • Threat
        • DUALS(2)
      • Vars
        • R(j);XS(I)::R1(L)
      • Refutation
        • P(i);CHECK,XS(I)
    • Try
      • Q(A);N_PINP(g),XB(a)
      • Threat
        • B(B)
      • Vars
        • P(g);OGATEB::QAB(A)
      • Refutation
        • P(c);XB(B)
  • Actual
    • Q(A);N_PINP(g)
    • Threat
      • DUALS(2)
    • Vars
      • P(i);P_PINR(L),XS(I)::P(E)
      • P(g);OGATEB::QAB(A)


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).