MESON Chess Problem Database

Problem Display
PID: 64567 (B1R1R3/8/7B/8/K1NpNr1r/2PkPn2/3p2bp/n2Q4 w - - 0 1)

Lukyanov, Valentin Volodimirovich

4th Place, Azerbaijan Championship, 1980

B1R1R3/8/7B/8/K1NpNr1r/2PkPn2/3p2bp/n2Q4

#2

10 + 9

3752 FIDE Album (1980-1982) 1988

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe4
      • 2.Sb2#
    • 1...Rfg4
      • 2.Sb2#
    • 1...Rf5
      • 2.Sb2#
    • 1...Rf6
      • 2.Sb2#
    • 1...Rf7
      • 2.Sb2#
    • 1...Rf8
      • 2.Sb2#
    • 1...Se1
      • 2.Qxd2#
    • 1...Sg1
      • 2.Qxd2#
    • 1...Se5
      • 2.Qxd2#
    • 1...Sg5
      • 2.Qxd2#
    • 1...dxc3
      • 2.Sf2#
    • 1...dxe3
      • 2.Sb2#
  • Tries
    • 1.Kb4?
      • threat
        • 2.Sf2#
        • 2.Sc5#
      • 1...Rxe4
        • 2.Sb2#
      • 1...dxe3
        • 2.Sb2#
        • 2.Sc5#
      • 1...h1S
        • 2.Sc5#
      • 1...Rf5
        • 2.Sb2#
        • 2.Sf2#
      • 1...Rh5
        • 2.Sf2#
      • 1...Sb3
        • 2.Sf2#
      • 1...Se1
        • 2.Sc5#
        • 2.Qxd2#
      • 1...Sg1
        • 2.Sc5#
        • 2.Qxd2#
      • 1...Se5
        • 2.Sc5#
        • 2.Qxd2#
      • 1...Sg5
        • 2.Sc5#
        • 2.Qxd2#
      • 1...Sc2+!
    • 1.Scxd2?
      • threat
        • 2.Sf2#
      • 1...Kxe3
        • 2.Sc4#
      • 1...Rxe4
        • 2.Sxf3#
      • 1...Sxd2
        • 2.Qxd2#
      • 1...dxc3
        • 2.Rxc3#
      • 1...dxe3
        • 2.Sxf3#
      • 1...Se1
        • 2.Sf1#
        • 2.Sc4#
      • 1...Sg1
        • 2.Sf1#
        • 2.Sc4#
      • 1...Se5
        • 2.Sf1#
        • 2.Sc4#
      • 1...Sg5
        • 2.Sf1#
        • 2.Sc4#
      • 1...h1S!
    • 1.Se5+?
      • 1...Sxe5
        • 2.Qxd2#
      • 1...Kxe3!
    • 1.Bxf4?
      • threat
        • 2.Sb2#
      • 1...dxc3
        • 2.Sf2#
      • 1...Rxf4!
  • Keys
    • 1.Sexd2!
      • threat
        • 2.Sb2#
      • 1...Kxc3
        • 2.Sb1#
      • 1...dxc3
        • 2.Sxf3#
      • 1...dxe3
        • 2.Rxe3#
      • 1...Se5
        • 2.Sb1#
        • 2.Se4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 10
  • Sets
    • R(h);XS(F)::S(E)
    • R(h);::S(E)
    • S(f);N_GUARD::QAR1(A),XP(b)
    • P(g);SBLOCK,XP(B)::S(F)
    • P(g);SBLOCK,XP(C)::S(E)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • R(h);XS(F)::S(E)
        • P(d);::S(F)
        • R(i);::S(F)
        • S(a);::S(F)
      • Refutation
        • S(a);CHECK
    • Try
      • S(E);XP(b)
      • Threat
        • S(F)
      • Vars
        • K(e);P-FLIGHT,P_SPINR(h),XP(C)::S(E)
        • R(h);XS(F)::QAR(A)+S(E),XS(f)
        • S(f);OGATE,P_SPINS(f),XS(E)::QAR1(A),XS(f)
        • P(g);OGATE,P_PINS(F),XP(B)::R1(I),XP(g)
        • P(g);P_PINS(F),SBLOCK,XP(C)::QAR(A)+S(E),XS(f)
      • Refutation
        • P(d);
    • Try
      • S(E);CHECK
      • Vars
        • S(f);XS(E)::QAR1(A),XP(b)
      • Refutation
        • K(e);N_SPINP(b),P-FLIGHT,P_SPINR(h),XP(C)
    • Try
      • B(G);XR(h)
      • Threat
        • S(E)
      • Vars
        • P(g);SBLOCK,XP(B)::S(F)
      • Refutation
        • R(i);XB(G)
  • Actual
    • S(F);XP(b)
    • Threat
      • S(E)
    • Vars
      • K(e);P-FLIGHT,XP(B)::S(F)
      • P(g);P_PINS(E),SBLOCK,XP(B)::QAR(A)+S(F),XS(f)
      • P(g);OGATE,P_PINS(E),XP(C)::R1(J),XP(g)
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