MESON Chess Problem Database

Problem Display
PID: 233990 (5B2/4P2K/4pkn1/1Q6/8/8/8/8 w - - 0 1)

Rice, John Michael

Chess Life, 1999

5B2/4P2K/4pkn1/1Q6/8/8/8/8

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sxf8+
      • 2.exf8Q#
  • Tries
    • 1.Bg7+?
      • 1...Kf7
        • 2.e8Q#
      • 1...Kxe7!
    • 1.Qg5+?
      • 1...Kf7
        • 2.Qxg6#
      • 1...Kxg5!
    • 1.e8Q?
      • threat
        • 2.Bg7#
        • 2.Qxg6#
      • 1...Sxf8+
        • 2.Qxf8#
      • 1...e5
        • 2.Qxg6#
      • 1...Sf4
        • 2.Be7#
        • 2.Bg7#
        • 2.Qe7#
      • 1...Sh4
        • 2.Be7#
        • 2.Bg7#
        • 2.Qe7#
      • 1...Se7
        • 2.Bxe7#
        • 2.Bg7#
        • 2.Qxe7#
      • 1...Sh8
        • 2.Be7#
        • 2.Bg7#
        • 2.Qe7#
      • 1...Se5!
  • Keys
    • 1.Qh5!
      • 1...Sxf8+
        • 2.exf8Q#
      • 1...Kf7
        • 2.Qxg6#
      • 1...Sxe7
        • 2.Bg7#
      • 1...e5
        • 2.Qxg6#
      • 1...Sf4
        • 2.e8S#
      • 1...Sh4
        • 2.e8S#
      • 1...Se5
        • 2.e8S#
      • 1...Sh8
        • 2.e8S#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • S(c);CHECK,OGATE,XB(D)::PXS(c)=Q
  • Tries
    • Try
      • B(D);CHECK
      • Vars
        • K(b);P-FLIGHT::P=Q
      • Refutation
        • K(b);S_FLIGHT,XP(B)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAB1(A),XS(c)
      • Refutation
        • K(b);S_FLIGHT,XQ(A)
    • Try
      • P(B);
      • Threat
        • DUALS(2)
      • Vars
        • S(c);CHECK,OGATE,XB(D)::QAR2(B),XS(c)
        • P(a);::QAR1(B),XS(c)
      • Refutation
        • S(c);
  • Actual
    • Q(A);
    • Vars
      • S(c);CHECK,OGATE,XB(D)::PXS(c)=Q
      • K(b);P-FLIGHT,P_SPINS(c)::QAB1(A),XS(c)
      • S(c);SBLOCK,XP(B)::B(D)
      • P(a);SBLOCK::QAR1(A),XS(c)
      • S(c);::P=S
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