MESON Chess Problem Database

Problem Display
PID: 200632 (5Q2/8/7K/R3p3/4N1p1/3n1B2/4npR1/7k w - - 0 1)

Bylevski, Aleksandr

Bylevski, Boris

Problemas, 1993

5Q2/8/7K/R3p3/4N1p1/3n1B2/4npR1/7k

#2

6 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Sec1
      • 2.Sg3#
    • 1...Sg1
      • 2.Sg3#
    • 1...Sc3
      • 2.Sg3#
    • 1...Sg3
      • 2.Sxg3#
    • 1...Sd4
      • 2.Sg3#
    • 1...Sef4
      • 2.Sg3#
    • 1...Sdc1
      • 2.Sxf2#
    • 1...Se1
      • 2.Sxf2#
    • 1...Sb2
      • 2.Sxf2#
    • 1...Sb4
      • 2.Sxf2#
    • 1...Sdf4
      • 2.Sxf2#
    • 1...Sc5
      • 2.Sxf2#
  • Tries
    • 1.Rg1+?
      • 1...Kh2
        • 2.Rh1#
      • 1...Kxg1!
    • 1.Rh2+?
      • 1...Kg1
        • 2.Rh1#
      • 1...Kxh2!
    • 1.Qf5?
      • threat
        • 2.Qh5#
      • 1...gxf3
        • 2.Qh3#
      • 1...Sg1
        • 2.Sg3#
      • 1...Sg3
        • 2.Sxg3#
      • 1...Sef4
        • 2.Sg3#
      • 1...Sdf4
        • 2.Sxf2#
      • 1...f1S!
  • Keys
    • 1.Qf4!
      • threat
        • 2.Rxg4#
        • 2.Qh2#
      • 1...Sexf4
        • 2.Sg3#
      • 1...Sdxf4
        • 2.Sxf2#
      • 1...gxf3
        • 2.Qh2#
      • 1...exf4
        • 2.Rh5#
      • 1...f1Q
        • 2.Qh2#
      • 1...f1S
        • 2.Rxg4#
      • 1...f1B
        • 2.Qh2#
      • 1...f1R
        • 2.Qh2#
      • 1...Sg1
        • 2.Sg3#
        • 2.Rh2#
        • 2.Qh2#
      • 1...Sg3
        • 2.Sxg3#
      • 1...Sd4
        • 2.Sg3#
        • 2.Qh2#
      • 1...Se1
        • 2.Sxf2#
        • 2.Qh2#
      • 1...g3
        • 2.Qh4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 9
  • Sets
    • S(b);N_GUARD::S(C)
    • S(b);N_GUARD::S(C),XS(b)
    • S(d);N_GUARD::S(C),XP(c)
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • K(a);P-FLIGHT::R1(A)
      • Refutation
        • K(a);P-FLIGHT,XR(A)
    • Try
      • R(A);CHECK
      • Vars
        • K(a);P-FLIGHT::R1(A)
      • Refutation
        • K(a);P-FLIGHT,XR(A)
    • Try
      • Q(F);
      • Threat
        • QAR(F)
      • Vars
        • P(e);OGATE,XB(B)::QAR2(F)
        • S(b);N_GUARD::S(C)
        • S(b);N_GUARD::S(C),XS(b)
        • S(d);N_GUARD::S(C),XP(c)
      • Refutation
        • P(c);
  • Actual
    • Q(F);
    • Threat
      • DUALS(2)
    • Vars
      • S(b);N_GUARD,XQ(F)::S(C)
      • S(d);N_GUARD,XQ(F)::S(C),XP(c)
      • P(e);XB(B)::QAR1(F)
      • P(f);OGATE,XQ(F)::R(D)
      • P(c);::QAR1(F)
      • P(c);::B(B)+R(A),XP(e)
      • S(b);N_GUARD::S(C),XS(b)
      • P(e);OGATE::QAR(F)
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