MESON Chess Problem Database

Problem Display
PID: 137539 (BB3b2/R2p4/r7/3N2p1/4R3/r4k2/P2P1N2/5K2 w - - 0 1)

Mentasti, Gino

Prontuario del Problemista, 1977

BB3b2/R2p4/r7/3N2p1/4R3/r4k2/P2P1N2/5K2

#2

9 + 6

6490 yacpdb 2010

SOLUTION

  • SOUND
  • Sets
    • 1...Rxa2
      • 2.Re3#
    • 1...Re3
      • 2.Rxe3#
    • 1...R3a4
      • 2.Re3#
    • 1...R3a5
      • 2.Re3#
    • 1...Rd6
      • 2.Rxa3#
  • Tries
    • 1.Sb6?
      • threat
        • 2.Re3#
      • 1...Bd6
        • 2.Rg4#
      • 1...Re3
        • 2.Rxe3#
      • 1...d5
        • 2.Rf7#
      • 1...d6!
  • Keys
    • 1.Rg4!
      • threat
        • 2.Rg3#
      • 1...Rd6
        • 2.Rxa3#
      • 1...Bd6
        • 2.Sb6#
      • 1...d6
        • 2.Rf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • R(a);N_GUARD,XP(B)::R1(E)
    • R(a);N_GUARD::R1(E),XR(a)
    • R(a);N_GUARD::R1(E)
    • R(d);OGATE::R(G),XR(a)
  • Tries
    • Try
      • S(F);
      • Threat
        • B(H)+R(E),DCHECK
      • Vars
        • B(f);S_CUTP(e)::B(H)+R(E)
        • R(a);::B(H)+R(E),DCHECK,XR(a)
        • P(e);OGATE::R(G)
      • Refutation
        • P(e);
  • Actual
    • R(E);
    • Threat
      • R1(E)
    • Vars
      • R(d);OGATE::R(G),XR(a)
      • B(f);S_CUTP(e)::B(H)+S(F)
      • P(e);OGATE::R(G)
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