MESON Chess Problem Database

Problem Display
PID: 204692 (8/r6B/3p1RNp/1r4p1/2p1k3/8/2P2PPN/3R3K w - - 0 1)

Brogi, Giuseppe

Revista Romana de Sah, 1969

8/r6B/3p1RNp/1r4p1/2p1k3/8/2P2PPN/3R3K

#2

9 + 7

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...g4
      • 2.Rf4#
  • Tries
    • 1.Sg4?
      • threat
        • 2.f3#
      • 1...Rb3
        • 2.Se7#
      • 1...Ra3
        • 2.S6e5#
      • 1...Rf5!
    • 1.Se5+?
      • 1...Kxe5
        • 2.Sg4#
      • 1...Rxh7!
    • 1.Se7+?
      • 1...Ke5
        • 2.Sg4#
      • 1...Rf5!
  • Keys
    • 1.Sf3!
      • threat
        • 2.Rd4#
      • 1...Rb1
        • 2.Se7#
      • 1...Rd5
        • 2.Re1#
      • 1...Ra1
        • 2.Sge5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • P(d);N_GUARD::R1(G)
  • Tries
    • Try
      • S(F);
      • Threat
        • P(D)
      • Vars
        • R(c);N_GUARD::B(I)+S(H)
        • R(g);N_GUARD::B(I)+S(H)
      • Refutation
        • R(c);
    • Try
      • S(H);CHECK
      • Vars
        • K(b);P-FLIGHT,XS(H)::S(F)
      • Refutation
        • R(g);XB(I)
    • Try
      • S(H);CHECK
      • Vars
        • K(b);P-FLIGHT::S(F)
      • Refutation
        • R(c);P_SPINR(c)
  • Actual
    • S(F);
    • Threat
      • R1(A)
    • Vars
      • R(c);N_GUARD,P_PINR(A)::B(I)+S(H)
      • R(c);SBLOCK::R(A)
      • R(g);N_GUARD,P_PINR(A)::B(I)+S(H)
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