MESON Chess Problem Database

Problem Display
PID: 64320 (6K1/4p3/nRBPk3/8/N1b2QP1/4rp2/3Pp3/2b5 w - - 0 1)

Lukyanov, Valentin Volodimirovich

2nd Prize, Ribak Primoria, 1982

6K1/4p3/nRBPk3/8/N1b2QP1/4rp2/3Pp3/2b5

#2

8 + 8

3752 FIDE Album (1980-1982) 1988

SOLUTION

  • SOUND
  • Sets
    • 1...Re5
      • 2.Qh6#
    • 1...Sb4
      • 2.Sc5#
    • 1...Sc5
      • 2.Sxc5#
    • 1...Sc7
      • 2.Sc5#
    • 1...Sb8
      • 2.Sc5#
  • Tries
    • 1.Be4?
      • threat
        • 2.Qf5#
      • 1...exd6
        • 2.Qxd6#
      • 1...Kd7+!
    • 1.Bb5?
      • threat
        • 2.Qf5#
      • 1...Kd5
        • 2.Bxc4#
      • 1...exd6
        • 2.Qxd6#
      • 1...Re5
        • 2.Qf7#
      • 1...Bd3!
    • 1.d4?
      • threat
        • 2.Qh6#
      • 1...exd6
        • 2.Qf7#
      • 1...Re5
        • 2.Qxe5#
      • 1...Bd3
        • 2.d5#
      • 1...Ra3
        • 2.Qe5#
      • 1...Rb3
        • 2.Qe5#
      • 1...Rc3
        • 2.Qe5#
      • 1...Rd3
        • 2.Qe5#
      • 1...Re4!
    • 1.d7?
      • threat
        • 2.d8S#
      • 1...Re5
        • 2.Qh6#
      • 1...Rd3!
  • Keys
    • 1.Rb7!
      • threat
        • 2.Rxe7#
      • 1...exd6
        • 2.Qf5#
      • 1...Re5
        • 2.Qh6#
      • 1...Sc7
        • 2.Sc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • R(c);SBLOCK::QAR(C)
    • S(f);N_GUARD::S(B)
    • S(f);N_GUARD::S(B),XS(f)
  • Tries
    • Try
      • B(F);
      • Threat
        • QAB1(C)
      • Vars
        • P(h);OGATE,P_SPINP(h),XP(G)::QAR1(C),XP(h)
      • Refutation
        • K(g);CHECK,S_FLIGHT
    • Try
      • B(F);
      • Threat
        • QAB1(C)
      • Vars
        • K(g);S_FLIGHT::B(F),XB(e)
        • P(h);OGATE,P_SPINP(h),XP(G)::QAR1(C),XP(h)
        • R(c);SBLOCK::QAB1(C)
      • Refutation
        • B(e);
    • Try
      • P(A);
      • Threat
        • QAR(C)
      • Vars
        • P(h);SBLOCK,XP(G)::QAB1(C)
        • R(c);N_GUARD::QAR1(C),XR(c)
        • B(e);N_GUARD::P(A)
        • R(c);N_GUARD::QAR1(C)
      • Refutation
        • R(c);
    • Try
      • P(G);
      • Threat
        • P=S
      • Vars
        • R(c);SBLOCK::QAR(C)
      • Refutation
        • R(c);
  • Actual
    • R(E);
    • Threat
      • R1(E),XP(h)
    • Vars
      • P(h);SBLOCK,XP(G)::QAB1(C)
      • R(c);SBLOCK::QAR(C)
      • S(f);N_GUARD::S(B)
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