MESON Chess Problem Database

Problem Display
PID: 225165 (R5Bk/4p1r1/3pN3/3pq3/3Q2PB/8/4pR2/4K3 w - - 0 1)

Mendes de Moraes Filho, Feliciano

US Problem Bulletin, 1966

R5Bk/4p1r1/3pN3/3pq3/3Q2PB/8/4pR2/4K3

#2

8 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qh2
      • 2.Qxg7#
    • 1...Qg3
      • 2.Qxg7#
    • 1...Qf4
      • 2.Qxg7#
    • 1...Qe3
      • 2.Qxg7#
    • 1...Qe4
      • 2.Qxg7#
    • 1...Qf5
      • 2.Qxg7#
    • 1...Qh5
      • 2.Qxg7#
    • 1...Rh7
      • 2.Bf7#
  • Keys
    • 1.Rh2!
      • 1...Qg3+
        • 2.Bxg3#
      • 1...Qxh2
        • 2.Qxg7#
      • 1...Qxd4
        • 2.Bf6#
      • 1...Qxe6
        • 2.Bf6#
      • 1...Rxg4
        • 2.Bf6#
      • 1...Rxg8
        • 2.Bf2#
        • 2.Bg3#
        • 2.Bg5#
        • 2.Bf6#
        • 2.Bxe7#
      • 1...Qf4
        • 2.Qxg7#
      • 1...Qf6
        • 2.Bxf6#
      • 1...Qe3
        • 2.Qxg7#
      • 1...Qe4
        • 2.Qxg7#
      • 1...Qf5
        • 2.Qxg7#
      • 1...Qg5
        • 2.Bxg5#
      • 1...Qh5
        • 2.Qxg7#
      • 1...Rg5
        • 2.Bxg5#
      • 1...Rg6
        • 2.Bf6#
      • 1...Rf7
        • 2.Bf6#
      • 1...Rh7
        • 2.Bf7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • Q(c);OGATE,P_SPINR(f)::QAB1(C),XR(f)
    • Q(c);OGATE,P_PINR(B),P_SPINR(f)::QAB1(C),XR(f)
    • R(f);N_GUARD,P_SPINQ(c),SBLOCK::R(G)+B(H)
  • Actual
    • R(B);
    • Vars
      • Q(c);CHECK,N_GUARD,P_SPINR(f)::R(B)+B(E),XQ(c)
      • Q(c);OGATE,P_SPINR(f),XR(B)::QAB1(C),XR(f)
      • Q(c);N_GUARD,XQ(C)::R(B)+B(E)
      • Q(c);N_GUARD,P_SPINR(f),XS(F)::R(B)+B(E)
      • R(f);P_SPINQ(c),XP(D)::R(B)+B(E),DCHECK
      • Q(c);OGATE,P_SPINR(f)::QAB1(C),XR(f)
      • Q(c);N_GUARD::R(B)+B(E),XQ(c)
      • Q(c);N_GUARD,P_SPINR(f)::R(B)+B(E),XQ(c)
      • R(f);N_GUARD,P_SPINQ(c)::R(B)+B(E),XR(f)
      • R(f);P_SPINQ(c)::R(B)+B(E),DCHECK
      • R(f);N_GUARD,P_SPINQ(c),SBLOCK::R(G)+B(H)
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