MESON Chess Problem Database

Problem Display
PID: 266784 (5B2/3R1p1r/pN4r1/1pPPk1Pp/q1p1b2N/3pK3/8/8 w - - 0 1)

Coombes, TA

The Problemist, 1954

5B2/3R1p1r/pN4r1/1pPPk1Pp/q1p1b2N/3pK3/8/8

#2

8 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rd6
      • 2.Bxd6#
    • 1...Rgg7
      • 2.Bd6#
      • 2.Re7#
    • 1...Rg8
      • 2.Bd6#
      • 2.Re7#
    • 1...Bf5
      • 2.Sf3#
    • 1...b4
      • 2.Sxc4#
    • 1...f5
      • 2.Sxg6#
    • 1...f6
      • 2.Bd6#
  • Tries
    • 1.Bg7+?
      • 1...Rf6
        • 2.Bxf6#
        • 2.Re7#
      • 1...Rgxg7
        • 2.Re7#
      • 1...f6
        • 2.Re7#
      • 1...Rhxg7!
  • Keys
    • 1.Rd6!
      • threat
        • 2.Sd7#
      • 1...Rxd6
        • 2.Bxd6#
      • 1...Bf5
        • 2.Sf3#
      • 1...b4
        • 2.Sxc4#
      • 1...f5
        • 2.Sxg6#
      • 1...f6
        • 2.Re6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • R(i);N_GUARD::B(H),XR(i)
    • B(d);N_GUARD,SBLOCK::S(B)
    • P(e);N_GUARD,S_CUTQ(b)::S(F),XP(c)
    • P(j);N_GUARD,SBLOCK,S_CUTB(d)::S(B),XR(i)
    • P(j);S_CUTR(i)::B(H)
  • Tries
    • Try
      • B(H);CHECK
      • Vars
        • R(i);XB(H)::R(G)
        • P(j);P_SPINP(j)::R(G)
      • Refutation
        • R(k);XB(H)
  • Actual
    • R(G);
    • Threat
      • S(F)
    • Vars
      • R(i);OGATE,XR(G)::B(H),XR(i)
      • B(d);N_GUARD,SBLOCK::S(B)
      • P(e);N_GUARD,S_CUTQ(b)::S(F),XP(c)
      • P(j);N_GUARD,SBLOCK,S_CUTB(d)::S(B),XR(i)
      • P(j);N_GUARD,S_CUTR(i)::R1(G)
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