MESON Chess Problem Database

Problem Display
PID: 87629 (1B1K4/4p2n/R4NN1/3p1kbQ/4r3/3Pr3/8/8 w - - 0 1)

Macleod, Norman Alasdair

American Chess Problemist, 1952

1B1K4/4p2n/R4NN1/3p1kbQ/4r3/3Pr3/8/8

#2

7 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rh4
      • 2.Sxh4#
  • Tries
    • 1.Se8?
      • threat
        • 2.Sg7#
      • 1...e6+
        • 2.Se7#
      • 1...Re6
        • 2.Sh4#
      • 1...e5+!
    • 1.dxe4+?
      • 1...dxe4
        • 2.Sh4#
        • 2.Sxe7#
      • 1...Rxe4!
  • Keys
    • 1.Sg8!
      • threat
        • 2.Sh6#
      • 1...e5+
        • 2.S8e7#
      • 1...e6+
        • 2.S6e7#
      • 1...Re6
        • 2.Sh4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(b);N_GUARD::S(E),XR(b)
  • Tries
    • Try
      • S(D);
      • Threat
        • S(D)
      • Vars
        • P(f);CHECK,S_CUTR(b)::S(E)
        • R(b);N_GUARD::S(E)
      • Refutation
        • P(f);CHECK
    • Try
      • P(A);CHECK,XR(b)
      • Refutation
        • R(a);XP(A)
  • Actual
    • S(D);
    • Threat
      • S(D)
    • Vars
      • P(f);CHECK,S_CUTR(b)::S(D)
      • P(f);CHECK,S_CUTR(b)::S(E)
      • R(b);N_GUARD::S(E)
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