MESON Chess Problem Database

Problem Display
PID: 263583 (B1r5/1r4BQ/5Rb1/2P5/PRpk2N1/P2p2K1/3p4/b2N4 w - - 0 1)

Foschini, Ettore

Xadrez Brasileiro, 1935

B1r5/1r4BQ/5Rb1/2P5/PRpk2N1/P2p2K1/3p4/b2N4

#2

11 + 8

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb4
      • 2.Rf5#
    • 1...Rb5
      • 2.Rf5#
    • 1...Rbb8
      • 2.Rf5#
  • Tries
    • 1.Rxc4+?
      • 1...Kd5
        • 2.Sde3#
      • 1...Kxc4!
    • 1.Rf5+?
      • 1...Rxg7
        • 2.Qxg7#
      • 1...Ke4!
    • 1.Rd6+?
      • 1...Ke4
        • 2.Qxg6#
      • 1...Kxc5!
  • Keys
    • 1.Sde3!
      • threat
        • 2.Rxc4#
      • 1...Kc3
        • 2.Rf7#
      • 1...Ke4
        • 2.Rf4#
      • 1...Kxc5
        • 2.Rxc4#
      • 1...Rxb4
        • 2.Rf5#
      • 1...Rxc5
        • 2.Rf4#
      • 1...Bf7
        • 2.Rc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • R(g);N_GUARD,N_SPINP(d),XR(E)::B(I)+R(H)
    • R(g);N_GUARD::B(I)+R(H)
  • Tries
    • Try
      • R(E);CHECK,XP(d)
      • Vars
        • K(e);P-FLIGHT,P_SPINR(g)::S(A)
      • Refutation
        • K(e);P-FLIGHT,XR(E)
    • Try
      • R(H);CHECK
      • Vars
        • R(g);OGATE,XB(I)::QAB(J),XR(g)
      • Refutation
        • K(e);P-FLIGHT,P_SPINR(g)
    • Try
      • R(H);CHECK
      • Vars
        • K(e);N_GUARD,P-FLIGHT,P_SPINB(f),P_SPINR(g)::QAB(J),XB(f)
      • Refutation
        • K(e);N_SPINP(d),S_FLIGHT,XP(G)
  • Actual
    • S(A);
    • Threat
      • R1(E),XP(d)
    • Vars
      • K(e);N_GUARD,N_SPINP(d),S_FLIGHT::B(I)+R(H)
      • K(e);N_GUARD,P-FLIGHT,P_SPINB(f),P_SPINR(g)::R1(H)
      • K(e);N_SPINP(d),S_FLIGHT,XP(G)::R1(E),XP(d)
      • R(g);N_GUARD,N_SPINP(d),XR(E)::B(I)+R(H)
      • R(h);SBLOCK,XP(G)::B(I)+R(H),DCHECK
      • B(f);S_CUTR(g)::B(I)+R(H)
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