MESON Chess Problem Database

Problem Display
PID: 24375 (8/3R4/3N4/3k4/4N1K1/1RB5/8/8 w - - 0 1)

Hoy, Paul

2nd HM., Freie Presse, 1967

8/3R4/3N4/3k4/4N1K1/1RB5/8/8

#2

6 + 1

SOLUTION

  • SOUND
  • Tries
    • 1.Sf5+?
      • 1...Kc4
        • 2.Rb4#
      • 1...Kxe4
        • 2.Rb4#
      • 1...Ke6
        • 2.Sc5#
      • 1...Kc6!
    • 1.Sf7+?
      • 1...Kc4
        • 2.Rb4#
      • 1...Kc6
        • 2.Se5#
      • 1...Ke6
        • 2.Sc5#
      • 1...Kxe4!
    • 1.Se8+?
      • 1...Kc4
        • 2.Rb4#
      • 1...Kc6
        • 2.Rd6#
      • 1...Ke6
        • 2.Sc5#
      • 1...Kxe4!
  • Keys
    • 1.Sc4+!
      • 1...Kxc4
        • 2.Rb4#
      • 1...Kxe4
        • 2.Rd4#
      • 1...Kc6
        • 2.Se5#
      • 1...Ke6
        • 2.Sc5#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(a);S_FLIGHT::R1(A)
        • K(a);S_FLIGHT,XS(C)::R(A)
        • K(a);S_FLIGHT::S(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(E);CHECK
      • Vars
        • K(a);S_FLIGHT::R1(A)
        • K(a);S_FLIGHT::S(E)
        • K(a);S_FLIGHT::S(C)
      • Refutation
        • K(a);S_FLIGHT,XS(C)
    • Try
      • S(E);CHECK
      • Vars
        • K(a);S_FLIGHT::R1(A)
        • K(a);S_FLIGHT::R1(F)
        • K(a);S_FLIGHT::S(C)
      • Refutation
        • K(a);S_FLIGHT,XS(C)
  • Actual
    • S(E);CHECK
    • Vars
      • K(a);S_FLIGHT,XS(E)::R1(A)
      • K(a);OGATE,S_FLIGHT,XS(C)::R1(F)
      • K(a);S_FLIGHT::S(E)
      • K(a);S_FLIGHT::S(C)
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