MESON Chess Problem Database

Problem Display
PID: 3218 (k7/5Q2/3n4/5R2/4R3/8/K7/8 w - - 0 1)

Chepizhni, Viktor Ivanovich

Shakhmatny zadachi miniaturi, 1987

k7/5Q2/3n4/5R2/4R3/8/K7/8

#2

4 + 2

5454 Near Snap 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Sc4
      • 2.Re8#
    • 1...Sb5
      • 2.Re8#
    • 1...Sxf5
      • 2.Re8#
    • 1...Se8
      • 2.Rxe8#
  • Tries
    • 1.Rb4?
      • threat
        • 2.Ra5#
      • 1...Sxf5
        • 2.Qb7#
      • 1...Sb7
        • 2.Qxb7#
      • 1...Sc4
        • 2.Qb7#
      • 1...Sc8
        • 2.Qb7#
      • 1...Sb5!
    • 1.Re8+?
      • 1...Sc8
        • 2.Rxc8#
      • 1...Sxe8!
  • Keys
    • 1.Rb5!
      • threat
        • 2.Ra4#
      • 1...Sxe4
        • 2.Qb7#
      • 1...Sxb5
        • 2.Re8#
      • 1...Sb7
        • 2.Qxb7#
      • 1...Sc4
        • 2.Re8#
        • 2.Qb7#
      • 1...Sc8
        • 2.Qb7#

This anticipates 28689(1992)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • S(a);N_GUARD::R(B)
    • S(a);N_GUARD,XR(C)::R(B)
    • S(a);N_GUARD::R(B),XS(a)
  • Tries
    • Try
      • R(B);
      • Threat
        • R(C)
      • Vars
        • S(a);N_GUARD,XR(C)::QAB1(D)
        • S(a);N_GUARD::QAB1(D),XS(a)
        • S(a);N_GUARD::QAB1(D)
      • Refutation
        • S(a);
    • Try
      • R(B);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::R(B),XS(a)
      • Refutation
        • S(a);XR(B)
  • Actual
    • R(C);
    • Threat
      • R(B)
    • Vars
      • S(a);N_GUARD,XR(B)::QAB1(D)
      • S(a);N_GUARD,XR(C)::R(B)
      • S(a);N_GUARD::QAB1(D),XS(a)
      • S(a);N_GUARD::QAB1(D)
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