MESON Chess Problem Database

Problem Display
PID: 7693 (4r3/3nk3/2Q1NR2/5K2/8/8/8/8 w - - 0 1)

Lincoln, Robert A

The Problemist, 1992

4r3/3nk3/2Q1NR2/5K2/8/8/8/8

#2

4 + 3

2838 Fun with Chess Miniatures 1996

SOLUTION

  • SOUND
  • Tries
    • 1.Sf8?
      • threat
        • 2.Qxd7#
      • 1...Kd8
        • 2.Qxd7#
      • 1...Sxf6
        • 2.Qxf6#
      • 1...Sxf8
        • 2.Qd6#
      • 1...Rd8
        • 2.Qe6#
      • 1...Sc5
        • 2.Qd6#
      • 1...Se5
        • 2.Qd6#
      • 1...Sb6
        • 2.Qd6#
      • 1...Sb8
        • 2.Qd6#
      • 1...Rxf8!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Qxd7#
      • 1...Kd8
        • 2.Qxd7#
      • 1...Sxc5
        • 2.Qd6#
      • 1...Sxf6
        • 2.Qxf6#
      • 1...Rd8
        • 2.Qe6#
      • 1...Se5
        • 2.Qd6#
      • 1...Sb6
        • 2.Qd6#
      • 1...Sb8
        • 2.Qd6#
      • 1...Sf8
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);
      • Threat
        • QAR1(B),XS(a)
      • Vars
        • K(b);S_FLIGHT::QAR1(B),XS(a)
        • S(a);OGATE,XR(D)::QAB1(B),XS(a)
        • S(a);XS(C)::QAB1(B)
        • R(c);SBLOCK::QAR1(B)
        • S(a);::QAB1(B)
      • Refutation
        • R(c);P_PINR(D),XS(C)
  • Actual
    • S(C);
    • Threat
      • QAR1(B),XS(a)
    • Vars
      • K(b);S_FLIGHT::QAR1(B),XS(a)
      • S(a);XS(C)::QAB1(B)
      • S(a);OGATE,XR(D)::QAB1(B),XS(a)
      • R(c);SBLOCK::QAR1(B)
      • S(a);::QAB1(B)
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