MESON Chess Problem Database

Problem Display
PID: 264848 (R6Q/r4PBK/1nN5/3p4/1b6/kPn5/3R4/3B4 w - - 0 1)

van Dooren, Rene

The Problemist, 1993

R6Q/r4PBK/1nN5/3p4/1b6/kPn5/3R4/3B4

#2

9 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Bf8
      • 2.Bxf8#
      • 2.Qxf8#
    • 1...Sa2
      • 2.Bb2#
  • Tries
    • 1.Bf8?
      • threat
        • 2.Bxb4#
      • 1...Bxf8
        • 2.Qxf8#
      • 1...Bc5
        • 2.Bxc5#
      • 1...Bd6
        • 2.Bxd6#
      • 1...Be7
        • 2.Bxe7#
      • 1...Sa2
        • 2.Qb2#
      • 1...Sxd1!
    • 1.Ra2+?
      • 1...Sxa2
        • 2.Bb2#
      • 1...Kxa2!
    • 1.f8Q?
      • threat
        • 2.Qxb4#
      • 1...Bxf8
        • 2.Qxf8#
      • 1...Bc5
        • 2.Qxc5#
      • 1...Bd6
        • 2.Qxd6#
      • 1...Be7
        • 2.Qxe7#
      • 1...Sa2!
  • Keys
    • 1.Qf8!
      • threat
        • 2.Qxb4#
      • 1...Bxf8
        • 2.Bxf8#
      • 1...Bc5
        • 2.Qxc5#
      • 1...Bd6
        • 2.Qxd6#
      • 1...Be7
        • 2.Qxe7#
      • 1...Sa2
        • 2.Bb2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(b);OGATE,SBLOCK::B(F)
  • Tries
    • Try
      • B(F);P_PINB(c),P_SPINP(E)
      • Threat
        • B(F),XB(c)
      • Vars
        • B(c);N_SPINB(c),OGATE,XB(F)::QAB(I),XB(c)
        • B(c);OGATEB::B(F),XB(c)
        • B(c);N_PINP(E),OGATEB::B(F),XB(c)
        • S(b);OGATE::QAB1(I)
      • Refutation
        • S(b);XB(A)
    • Try
      • R(B);CHECK
      • Vars
        • S(b);OGATE,SBLOCK,XR(B)::B(F)
      • Refutation
        • K(a);P-FLIGHT,XR(B)
    • Try
      • P(E);P_PINB(c),P_SPINB(F)
      • Threat
        • QAB1(E),XB(c)
      • Vars
        • B(c);N_SPINB(c),OGATE,XQ(E)::QAB(I),XB(c)
        • B(c);OGATEB::QAB(E),XB(c)
        • B(c);N_PINB(F),OGATEB::QAB(E),XB(c)
      • Refutation
        • S(b);
  • Actual
    • Q(I);P_PINB(c)
    • Threat
      • QAB1(I),XB(c)
    • Vars
      • B(c);N_SPINB(c),OGATE,XQ(I)::B(F),XB(c)
      • B(c);OGATEB::QAB(I),XB(c)
      • S(b);OGATE,SBLOCK::B(F)
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