MESON Chess Problem Database

Problem Display
PID: 136669 (2qbrnQK/R1P1kP2/1r2P1p1/B1P3p1/b3N1P1/8/8/4R3 w - - 0 1)

Mendes de Moraes Filho, Feliciano

3rd Prize, BCF 106. Ty., 1963-1964

2qbrnQK/R1P1kP2/1r2P1p1/B1P3p1/b3N1P1/8/8/4R3

#2

11 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe6
      • 2.fxe8Q#
    • 1...Qxe6
      • 2.c8S#
    • 1...Rxe6
      • 2.cxd8Q#
      • 2.cxd8B#
    • 1...Sd7
      • 2.Qxe8#
      • 2.fxe8Q#
      • 2.fxe8R#
  • Tries
    • 1.cxd8Q+?
      • 1...Kxe6
        • 2.Sd2#
        • 2.Sf2#
        • 2.Sc3#
        • 2.Sg3#
        • 2.Sxg5#
        • 2.Sf6#
        • 2.fxe8Q#
        • 2.fxe8R#
      • 1...Kxd8!
    • 1.cxd8B+?
      • 1...Kxe6
        • 2.Sc3#
        • 2.Sf6#
        • 2.fxe8Q#
        • 2.fxe8R#
      • 1...Kxd8!
    • 1.fxe8Q+?
      • 1...Kxe8
        • 2.Qf7#
      • 1...Bxe8!
    • 1.fxe8R+?
      • 1...Kxe8
        • 2.Qf7#
      • 1...Bxe8!
  • Keys
    • 1.Qg7!
      • threat
        • 2.Qf6#
      • 1...Sxe6+
        • 2.f8Q#
        • 2.f8B#
      • 1...Sd7+
        • 2.f8S#
      • 1...Sh7+
        • 2.f8S#
      • 1...Kxe6
        • 2.Sf6#
      • 1...Qxe6
        • 2.c8S#
      • 1...Rxe6
        • 2.cxd8Q#
        • 2.cxd8B#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(e);P-FLIGHT,XP(F)::PXR(h)=Q
    • Q(f);OGATE,SBLOCK,XP(F)::P=S
    • R(c);SBLOCK,XP(F)::PXB(g)=Q
  • Tries
    • Try
      • P(H);CHECK,XB(g)
      • Refutation
        • K(e);P_SPINR(c),S_FLIGHT,XQ(H)
    • Try
      • P(H);CHECK,XB(g)
      • Refutation
        • K(e);P_SPINR(c),S_FLIGHT,XB(H)
    • Try
      • P(I);CHECK,XR(h)
      • Vars
        • K(e);P-FLIGHT,P_SPINS(i),XQ(I)::QAB1(J)
      • Refutation
        • B(a);XQ(I)
    • Try
      • P(I);CHECK,XR(h)
      • Vars
        • K(e);P-FLIGHT,P_SPINS(i),XR(I)::QAB1(J)
      • Refutation
        • B(a);XR(I)
  • Actual
    • Q(J);
    • Threat
      • QAB1(J)
    • Vars
      • S(i);CHECK,OGATE,SBLOCK,XP(F)::P=Q
      • S(i);CHECK,OGATE::P=S
      • K(e);P-FLIGHT,XP(F)::R(A)+S(B)
      • Q(f);OGATE,SBLOCK,XP(F)::P=S
      • R(c);SBLOCK,XP(F)::PXB(g)=Q
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