MESON Chess Problem Database

Problem Display
PID: 2418 (3rk1rn/1R6/1N1BP1p1/4KN2/8/8/8/8 w - - 0 1)

Jonas, Michael B

Source?, 0000

3rk1rn/1R6/1N1BP1p1/4KN2/8/8/8/8

#2

6 + 5

1679 American Chess Nuts 1868

SOLUTION

  • SOUND
  • Sets
    • 1...Rb8
      • 2.Rxb8#
    • 1...Rg7
      • 2.Sxg7#
    • 1...Rf8
      • 2.Sg7#
      • 2.Re7#
    • 1...Sf7+
      • 2.exf7#
  • Keys
    • 1.Rg7!
      • threat
        • 2.Rxg8#
      • 1...Sf7+
        • 2.exf7#
      • 1...Rxg7
        • 2.Sxg7#
      • 1...Rf8
        • 2.Re7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • R(b);OGATEB::R(F),XR(b)
    • R(d);N_GUARD::S(B),XR(d)
    • S(e);CHECK,OGATE::P(E),XS(e)
  • Actual
    • R(F);
    • Threat
      • R(F),XR(d)
    • Vars
      • S(e);CHECK,OGATE::P(E),XS(e)
      • R(d);XR(F)::S(B),XR(d)
      • R(d);SBLOCK::R1(F)
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