MESON Chess Problem Database

Problem Display
PID: 64777 (2K3n1/b3p2b/1p2p1R1/pR1NnP1p/4k1r1/r2NP3/B2P2P1/5Q2 w - - 0 1)

Melnichenko, Viktor Oleksandrovich

Rudenko, Valentin Fedorovich

1st Prize, Leninska Zmina, 1980

2K3n1/b3p2b/1p2p1R1/pR1NnP1p/4k1r1/r2NP3/B2P2P1/5Q2

#2

11 + 12

3752 FIDE Album (1980-1982) 1988

SOLUTION

  • SOUND
  • Sets
    • 1...Rxa2
      • 2.Sc3#
    • 1...Rc3+
      • 2.Sxc3#
    • 1...Ra4
      • 2.Sc3#
    • 1...exd5
      • 2.Bxd5#
    • 1...exf5
      • 2.Sf2#
  • Tries
    • 1.Sf6+?
      • 1...Sxf6
        • 2.Rxe5#
      • 1...exf6!
    • 1.Sc7?
      • threat
        • 2.Rxe5#
      • 1...Sxd3
        • 2.Qf3#
      • 1...Sxg6
        • 2.Sf2#
      • 1...Sf3
        • 2.Sf2#
        • 2.gxf3#
      • 1...Sc4
        • 2.Sf2#
      • 1...Sc6
        • 2.Sf2#
      • 1...Sd7
        • 2.Sf2#
      • 1...Sf7
        • 2.Sf2#
      • 1...Rxd3!
    • 1.Rxe6?
      • threat
        • 2.Rxe5#
      • 1...Rc3+
        • 2.Sxc3#
      • 1...Rxd3
        • 2.Qf3#
      • 1...Bxf5
        • 2.Sf2#
      • 1...Bb8!
  • Keys
    • 1.Bb1!
      • threat
        • 2.Sf2#
      • 1...Rc3+
        • 2.Sxc3#
      • 1...Rxd3
        • 2.Sc3#
      • 1...Rxg2
        • 2.Qf4#
      • 1...Sxd3
        • 2.Rxe6#
      • 1...Sxg6
        • 2.Qf3#
      • 1...Sf3
        • 2.Qxf3#
      • 1...Sc4
        • 2.Qf3#
      • 1...Sc6
        • 2.Qf3#
      • 1...Sd7
        • 2.Qf3#
      • 1...Sf7
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 4
  • Sets
    • R(a);N_GUARD,XB(B)::S(H)
    • R(a);CHECK,N_GUARD::S(H),XR(a)
    • R(a);N_GUARD::S(H)
    • P(h);OGATE,XS(H)::B(B),XP(h)
    • P(h);SBLOCK,XP(I)::S(E)
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • S(l);XS(H)::R1(G),XS(e)
      • Refutation
        • P(j);XS(H)
    • Try
      • S(H);
      • Threat
        • R1(G),XS(e)
      • Vars
        • S(e);N_GUARD,SBLOCK,XS(E)::QAB1(A)
        • S(e);XR(J)::S(E)
        • S(e);::S(E)
      • Refutation
        • R(a);XS(E)
    • Try
      • R(J);P_PINS(e),XP(h)
      • Threat
        • R1(J),XS(e)
      • Vars
        • R(a);CHECK,N_GUARD::S(H),XR(a)
        • R(a);SBLOCK,XS(E)::QAB1(A)
        • B(k);P_PINR(J),SBLOCK,XP(I)::S(E)
      • Refutation
        • B(i);
  • Actual
    • B(B);
    • Threat
      • B(B)+S(E),DCHECK
    • Vars
      • R(a);CHECK,N_GUARD::S(H),XR(a)
      • R(a);N_GUARD,P_SPINR(a),XS(E)::S(H)
      • R(c);N_GUARD,XP(D)::QAR1(A)
      • S(e);OGATEB,P_SPINS(e),XS(E)::R(J),XP(h)
      • S(e);N_GUARD,XR(J)::QAB1(A)
      • S(e);N_GUARD::QAB1(A),XS(e)
      • S(e);N_GUARD::QAB1(A)
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