MESON Chess Problem Database

Problem Display
PID: 234644 (4k1n1/4P1K1/5R2/8/1N6/8/4Q3/8 w - - 0 1)

Lincoln, Robert A

Kudesnik, 2005

4k1n1/4P1K1/5R2/8/1N6/8/4Q3/8

#2

5 + 2

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qd1?
      • threat
        • 2.Qd8#
      • 1...Sxe7
        • 2.Rf8#
      • 1...Kxe7!
    • 1.Qd3?
      • threat
        • 2.Qd8#
      • 1...Sxe7
        • 2.Rf8#
      • 1...Kxe7!
    • 1.Qd2?
      • threat
        • 2.Qd8#
      • 1...Sxe7
        • 2.Rf8#
      • 1...Kxe7!
  • Keys
    • 1.Sd5!
      • threat
        • 2.Qb5#
      • 1...Kd7
        • 2.e8Q#
      • 1...Sxf6
        • 2.Sxf6#
      • 1...Sxe7
        • 2.Qxe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • S(b);SBLOCK,XP(D)::R1(C)
      • Refutation
        • K(a);P-FLIGHT,XP(D)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • S(b);SBLOCK,XP(D)::R1(C)
      • Refutation
        • K(a);P-FLIGHT,XP(D)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • S(b);SBLOCK,XP(D)::R1(C)
      • Refutation
        • K(a);P-FLIGHT,XP(D)
  • Actual
    • S(B);
    • Threat
      • QAB(A)
    • Vars
      • K(a);OGATE,S_FLIGHT::P=Q
      • S(b);XR(C)::S(B),XS(b)
      • S(b);OGATE,P_SPINS(b),XP(D)::QAR1(A),XS(b)
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