MESON Chess Problem Database

Problem Display
PID: 287356 (3NNR2/Kb2p3/7p/R2nk1p1/3p1p2/3p1P2/4P3/4Q2q w - - 0 1)

Melnichenko, Viktor Oleksandrovich

Rudenko, Valentin Fedorovich

Uralski Problemist, 2005

3NNR2/Kb2p3/7p/R2nk1p1/3p1p2/3p1P2/4P3/4Q2q

#2

8 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf3
      • 2.exf3#
    • 1...Qh3
      • 2.exd3#
    • 1...Qh5
      • 2.exd3#
    • 1...dxe2
      • 2.Qxe2#
  • Tries
    • 1.Rf6?
      • threat
        • 2.Sf7#
      • 1...Qxf3
        • 2.exf3#
      • 1...Qh5
        • 2.exd3#
      • 1...exf6!
    • 1.Qb4?
      • threat
        • 2.Qxe7#
      • 1...Bc8
        • 2.Qb8#
      • 1...e6
        • 2.Qd6#
      • 1...Qh3!
    • 1.e3?
      • threat
        • 2.exf4#
      • 1...dxe3
        • 2.Qc3#
      • 1...fxe3
        • 2.Qg3#
      • 1...Qxe1!
  • Keys
    • 1.e4!
      • threat
        • 2.Rf5#
      • 1...dxe4 ep
        • 2.Qc3#
      • 1...fxe4 ep
        • 2.Qg3#
      • 1...Qh3
        • 2.exd5#
      • 1...Bc8
        • 2.Rxd5#
      • 1...e6
        • 2.Sf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • Q(a);OGATE,XP(C)::QAR(A)+P(B),XQ(a)
    • Q(a);N_GUARD::QAR(A)+P(B),XP(b)
    • P(b);OGATE,P_SPINP(b),XP(B)::QAR(A),XP(b)
  • Tries
    • Try
      • R(H);
      • Threat
        • S(F)
      • Vars
        • Q(a);OGATE,XP(C)::QAR(A)+P(B),XQ(a)
        • Q(a);N_GUARD::QAR(A)+P(B),XP(b)
      • Refutation
        • P(j);XR(H)
    • Try
      • Q(A);
      • Threat
        • QAR2(A),XP(j)
      • Vars
        • B(i);OGATE::QAB(A)
        • P(j);N_GUARD::QAB1(A)
      • Refutation
        • Q(a);
    • Try
      • P(B);
      • Threat
        • QAR(A)+P(B)DCHECK,XP(d)
      • Vars
        • P(c);OGATEB,P_SPINP(c),XP(B)::QAB(A)
        • P(d);OGATEB,P_SPINP(d),XP(B)::QAB(A)
      • Refutation
        • Q(a);XQ(A)
  • Actual
    • P(B);
    • Threat
      • R1(H)
    • Vars
      • P(c);EP,OGATEB,P_SPINP(c),XP(B)::QAB(A)
      • P(d);EP,OGATEB,P_SPINP(d),XP(B)::QAB(A)
      • Q(a);N_GUARD::QAR(A)+P(B),XS(e)
      • B(i);N_GUARD::R1(D),XS(e)
      • P(j);SBLOCK::S(F)
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