MESON Chess Problem Database

Problem Display
PID: 49751 (3RnN2/2p1p1n1/2P1P2R/3pkP1p/3N3P/3K2P1/8/8 w - - 0 1)

Lewis, Robert Tony

4th HM., The Problemist, 2003/I

3RnN2/2p1p1n1/2P1P2R/3pkP1p/3N3P/3K2P1/8/8

#2

10 + 7

56 The Problemist 2005
133 The Problemist Supplement 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Sxf5
      • 2.Sf3#
    • 1...Sxe6
      • 2.Rxe6#
    • 1...Sd6
      • 2.Sd7#
    • 1...Sf6
      • 2.Sg6#
  • Tries
    • 1.Ke3?
      • 1...Sxe6
        • 2.Rxe6#
      • 1...Sd6
        • 2.Sd7#
      • 1...Sf6
        • 2.Sg6#
      • 1...Sxf5+!
    • 1.Rg6?
      • 1...Sxf5
        • 2.Sf3#
      • 1...Sxe6
        • 2.Rxe6#
      • 1...Sd6
        • 2.Sd7#
      • 1...Sf6!
    • 1.Rd7?
      • 1...Sxf5
        • 2.Sf3#
      • 1...Sxe6
        • 2.Rxe6#
      • 1...Sf6
        • 2.Sg6#
      • 1...Sd6!
    • 1.f6?
      • 1...Sxf6
        • 2.Sg6#
      • 1...exf6
        • 2.Sg6#
      • 1...Sd6
        • 2.Sd7#
      • 1...Sf5
        • 2.Sf3#
      • 1...Sxe6!
  • Keys
    • 1.Rf6!
      • 1...Kxf6
        • 2.Sd7#
      • 1...Sxf5
        • 2.Rxf5#
      • 1...Sxe6
        • 2.Rxe6#
      • 1...Sxf6
        • 2.Sg6#
      • 1...exf6
        • 2.Sg6#
      • 1...Sd6
        • 2.Sd7#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(f);SBLOCK,XP(E)::S(C)
    • S(f);OGATE,XP(G)::R1(H),XS(f)
    • S(g);SBLOCK::S(J)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • S(f);OGATE,XP(G)::R1(H),XS(f)
        • S(g);SBLOCK::S(J)
      • Refutation
        • S(f);CHECK,XP(E)
    • Try
      • R(H);
      • Vars
        • S(f);SBLOCK,XP(E)::S(C)
        • S(f);OGATE,XP(G)::R1(H),XS(f)
        • S(g);SBLOCK::S(J)
      • Refutation
        • S(g);
    • Try
      • R(I);
      • Vars
        • S(f);SBLOCK,XP(E)::S(C)
        • S(f);OGATE,XP(G)::R1(H),XS(f)
        • S(g);SBLOCK::S(J)
      • Refutation
        • S(g);
    • Try
      • P(E);
      • Vars
        • S(g);SBLOCK,XP(E)::S(J)
        • P(e);SBLOCK,XP(E)::S(J)
        • S(g);SBLOCK::S(J)
        • S(f);SBLOCK::S(C)
      • Refutation
        • S(f);XP(G)
  • Actual
    • R(H);
    • Vars
      • K(b);S_FLIGHT,XR(H)::S(J)
      • S(f);OGATE,XP(E)::R1(H),XS(f)
      • S(f);OGATE,XP(G)::R1(H),XS(f)
      • S(g);SBLOCK,XR(H)::S(J)
      • P(e);SBLOCK,XR(H)::S(J)
      • S(g);SBLOCK::S(J)
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