MESON Chess Problem Database

Problem Display
PID: 86407 (1Q3Kb1/1p6/qp3PRn/4r1P1/4Nkp1/n3R1N1/3p4/2b3BB w - - 0 1)

Melnichenko, Viktor Oleksandrovich

Rudenko, Valentin Fedorovich

Ukrajina, 1982

1Q3Kb1/1p6/qp3PRn/4r1P1/4Nkp1/n3R1N1/3p4/2b3BB

#2

10 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sf5
      • 2.Sh5#
  • Tries
    • 1.Sc3?
      • threat
        • 2.Qxe5#
      • 1...Qa5
        • 2.Sce2#
      • 1...Qa8
        • 2.Sce2#
      • 1...Sc4
        • 2.Sce2#
      • 1...Sf7
        • 2.Sd5#
      • 1...Qb5!
    • 1.Sc5?
      • threat
        • 2.Qxe5#
      • 1...Qa8
        • 2.Sd3#
      • 1...Sc4
        • 2.Sd3#
      • 1...Sf7
        • 2.Se6#
      • 1...Bb2!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Sh5#
      • 1...Re8+
        • 2.Sxe8#
      • 1...Rxe3
        • 2.Sde4#
      • 1...Rxg5
        • 2.Sdf5#
      • 1...Re4
        • 2.Sdxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • S(i);SBLOCK::S(D)
  • Tries
    • Try
      • S(E);
      • Threat
        • QAB1(I),XR(f)
      • Vars
        • Q(g);N_GUARD::S(E)
        • Q(g);N_GUARD,P_PINQ(I)::S(E)
        • S(c);S_CUTQ(g)::S(E)
        • S(i);S_CUTB(k)::S(E)
      • Refutation
        • Q(g);
    • Try
      • S(E);
      • Threat
        • QAB1(I),XR(f)
      • Vars
        • Q(g);N_GUARD,P_PINQ(I)::S(E)
        • S(c);S_CUTQ(g)::S(E)
        • S(i);S_CUTB(k)::S(E)
      • Refutation
        • B(a);
  • Actual
    • S(E);N_PINR(f)
    • Threat
      • S(D)
    • Vars
      • R(f);CHECK::QAB(I)+S(E),XR(f)
      • R(f);XR(C)::QAB(I)+S(E)
      • R(f);XP(F)::QAB(I)+S(E)
      • R(f);::QAB(I)+S(E),XR(f)
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