MESON Chess Problem Database

Problem Display
PID: 86545 (k7/2K5/3p4/3b4/3B4/8/2n3R1/2Q5 w - - 0 1)

Melnichenko, Viktor Oleksandrovich

2nd HM., Banska Bystrica (BABY)-50 JT, 1993

k7/2K5/3p4/3b4/3B4/8/2n3R1/2Q5

#2

4 + 4

4393 Uralski Problemist 1993
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bf3
      • 2.Rg8#
    • 1...Be4
      • 2.Rg8#
    • 1...Bg8
      • 2.Rxg8#
    • 1...Sa1
      • 2.Qa3#
    • 1...Se1
      • 2.Qa3#
    • 1...Sa3
      • 2.Qxa3#
    • 1...Se3
      • 2.Qa3#
    • 1...Sxd4
      • 2.Qa3#
  • Tries
    • 1.Qa1+?
      • 1...Ba2
        • 2.Rg8#
      • 1...Sa3
        • 2.Qxa3#
      • 1...Sxa1!
    • 1.Qf1?
      • threat
        • 2.Qa6#
        • 2.Qf8#
      • 1...Sxd4
        • 2.Qa6#
      • 1...Bf3
        • 2.Rg8#
        • 2.Qa6#
      • 1...Bc4
        • 2.Qf8#
      • 1...Bc6
        • 2.Qa6#
      • 1...Be6
        • 2.Qa6#
      • 1...Bf7
        • 2.Qa6#
      • 1...Sb4
        • 2.Qf8#
      • 1...Bb7!
  • Keys
    • 1.Qh1!
      • threat
        • 2.Rg8#
      • 1...Bxg2
        • 2.Qh8#
      • 1...Sxd4
        • 2.Ra2#
      • 1...Bg8
        • 2.Rxg8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • B(b);N_GUARD::R(B)
    • B(b);N_GUARD::R(B),XB(b)
    • S(a);N_GUARD::QAR(A)
    • S(a);N_GUARD::QAR(A),XS(a)
    • S(a);N_GUARD,XB(C)::QAR(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • B(b);P_SPINB(b)::R(B)
        • S(a);N_GUARD,P_SPINS(a)::QAR(A),XS(a)
      • Refutation
        • S(a);XQ(A)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);XB(C)::QAR2(A)
        • B(b);::QAR(A)
        • B(b);::QAR2(A)
        • S(a);::QAR(A)
      • Refutation
        • B(b);
  • Actual
    • Q(A);
    • Threat
      • R(B)
    • Vars
      • B(b);N_GUARD,P_SPINB(b),XR(B)::QAB1(A)
      • S(a);OGATE,XB(C)::R(B)
      • B(b);::QAB(A)+R(B),DCHECK,XB(b)
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