MESON Chess Problem Database

Problem Display
PID: 158823 (b7/8/1B3K2/1N6/3PB2n/2Q5/3pk2N/q1n2R2 w - - 0 1)

Akobiya, Yuri

Revista Romana de Sah, 1982

b7/8/1B3K2/1N6/3PB2n/2Q5/3pk2N/q1n2R2

#2

8 + 6

328 Schweizerische Schachzeitung 1983
15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Sa2
      • 2.Qd3#
    • 1...Sb3
      • 2.Qd3#
    • 1...Sd3
      • 2.Qxd3#
    • 1...Sg2
      • 2.Qf3#
    • 1...Sf3
      • 2.Qxf3#
    • 1...Sf5
      • 2.Qf3#
    • 1...Sg6
      • 2.Qf3#
    • 1...d1S
      • 2.Qe1#
    • 1...d1B
      • 2.Qe1#
  • Tries
    • 1.Bd3+?
      • 1...Ke3
        • 2.Sg4#
        • 2.d5#
      • 1...Sxd3!
    • 1.Rf2+?
      • 1...Kd1
        • 2.Qxd2#
      • 1...Ke1
        • 2.Qxd2#
      • 1...Kxf2!
    • 1.Qg3?
      • threat
        • 2.Qf2#
      • 1...Qxd4+
        • 2.Sxd4#
      • 1...d1S
        • 2.Qe1#
      • 1...Sd3
        • 2.Bxd3#
        • 2.Qxd3#
      • 1...Bxe4!
    • 1.Qc4+?
      • 1...Sd3
        • 2.Qxd3#
      • 1...Ke3!
  • Keys
    • 1.d5!
      • threat
        • 2.Sd4#
      • 1...Qxc3+
        • 2.Sxc3#
      • 1...d1Q
        • 2.Rf2#
      • 1...d1R
        • 2.Rf2#
      • 1...Qa4
        • 2.Qe3#
      • 1...Sb3
        • 2.Bd3#
      • 1...Sd3
        • 2.Bxd3#
      • 1...Sf3
        • 2.Bxf3#
      • 1...Sf5
        • 2.Bf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • S(b);N_GUARD::QAB1(C)
    • S(b);N_GUARD::QAB1(C),XS(b)
    • S(e);N_GUARD::QAB1(C)
    • S(e);N_GUARD::QAB1(C),XS(e)
    • P(c);OGATE::QAR1(C)
  • Tries
    • Try
      • B(E);CHECK
      • Refutation
        • S(b);XB(E)
    • Try
      • R(A);CHECK
      • Vars
        • K(d);S_FLIGHT::QAR1(C),XP(c)
        • K(d);P-FLIGHT,P_SPINP(c)::QAB1(C),XP(c)
      • Refutation
        • K(d);P-FLIGHT,XR(A)
    • Try
      • Q(C);P_SPINP(D)
      • Threat
        • QAR1(C)
      • Vars
        • Q(a);CHECK,XP(D)::S(F),XQ(a)
        • P(c);N_GUARD::QAR1(C)
      • Refutation
        • B(f);XB(E)
    • Try
      • Q(C);CHECK,P_SPINP(D)
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAB1(C),XS(b)
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • P(D);P_SPINQ(C)
    • Threat
      • S(F)
    • Vars
      • Q(a);CHECK,XQ(C)::S(F),XQ(a)
      • P(c);SBLOCK::R1(A)
      • Q(a);N_PINQ(C)::QAR1(C)
      • S(b);N_GUARD::B(E)
      • S(b);N_GUARD::B(E),XS(b)
      • S(e);N_GUARD::B(E),XS(e)
      • S(e);N_GUARD::B(E)
HTML5 logo

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).