MESON Chess Problem Database

Problem Display
PID: 46544 (k4N1R/2K5/4Rr2/8/8/8/8/8 w - - 0 1)

Kovalenko, Vitaly Semenovich

Uralski Problemist, 2002

k4N1R/2K5/4Rr2/8/8/8/8/8

#2

4 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Rf1
      • 2.Ra6#
    • 1...Rf2
      • 2.Ra6#
    • 1...Rf3
      • 2.Ra6#
    • 1...Rf4
      • 2.Ra6#
    • 1...Rf5
      • 2.Ra6#
    • 1...Rxf8
      • 2.Ra6#
  • Tries
    • 1.Sg6+?
      • 1...Rf8
        • 2.Ra6#
      • 1...Ka7!
    • 1.Sd7+?
      • 1...Rf8
        • 2.Ra6#
      • 1...Ka7!
    • 1.Sh7+?
      • 1...Rf8
        • 2.Ra6#
      • 1...Ka7!
  • Keys
    • 1.Kb6!
      • 1...Rxe6+
        • 2.Sxe6#
      • 1...Kb8
        • 2.Sd7#
      • 1...Rxf8
        • 2.Rxf8#
      • 1...Rf1
        • 2.Re8#
      • 1...Rf2
        • 2.Re8#
      • 1...Rf3
        • 2.Re8#
      • 1...Rf4
        • 2.Re8#
      • 1...Rf5
        • 2.Re8#
      • 1...Rg6
        • 2.Sxg6#
      • 1...Rh6
        • 2.Sh7#
      • 1...Rf7
        • 2.Re8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 6
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • R(a);N_GUARD::R(A)
    • R(a);N_GUARD,P_SPINR(a),XS(C)::R(A)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • R(a);P_SPINR(a)::R(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • S(C);CHECK
      • Vars
        • R(a);P_SPINR(a)::R(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • S(C);CHECK
      • Vars
        • R(a);P_SPINR(a)::R(A)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • K(B);P_SPINR(A),S_FLIGHT
    • Vars
      • R(a);CHECK,XR(A)::R(D)+S(C),XR(a)
      • K(b);P-FLIGHT::R(D)+S(C),DCHECK
      • R(a);N_PINR(A),OGATE,P_SPINR(a),XS(C)::R(D),XR(a)
      • R(a);N_PINR(A)::R(A)
      • R(a);N_GUARD::R(D)+S(C),XR(a)
      • R(a);N_GUARD::R(D)+S(C)
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