MESON Chess Problem Database

Problem Display
PID: 789 (6n1/6R1/p6p/P2B3p/Pp4qr/P6p/P6p/R2NK1kN w - - 0 1)

Barnes, Barry Peter

Lipton, Michael

British Chess Magazine, 1962

6n1/6R1/p6p/P2B3p/Pp4qr/P6p/P6p/R2NK1kN

#2

10 + 10

3174 The Two-move Chess Problem Tradition and Development 1966

SOLUTION

  • SOUND
  • Sets
    • 1...Qg3+
      • 2.Rxg3#
  • Tries
    • 1.Sb2?
      • threat
        • 2.Kd2#
      • 1...Qg5
        • 2.Ke2#
      • 1...Qg2!
    • 1.Sdf2?
      • threat
        • 2.Kd2#
      • 1...Qg5
        • 2.Ke2#
      • 1...Qxg7!
  • Keys
    • 1.Kd2!
      • threat
        • 2.Sb2#
        • 2.Sdf2#
        • 2.Sc3#
        • 2.Se3#
      • 1...Qg2+
        • 2.Sdf2#
      • 1...Qg5+
        • 2.Se3#
      • 1...Kf1
        • 2.Se3#
      • 1...Qxg7
        • 2.Sb2#
        • 2.Sc3#

This is a version

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • Q(e);CHECK,OGATE::R(J),XQ(e)
  • Tries
    • Try
      • S(B);
      • Threat
        • R(A)+K(C)
      • Vars
        • Q(e);::R(A)+K(C)
      • Refutation
        • Q(e);
    • Try
      • S(B);
      • Threat
        • R(A)+K(C)
      • Vars
        • Q(e);::R(A)+K(C)
      • Refutation
        • Q(e);N_SPINQ(e),XR(J)
  • Actual
    • K(C);S_FLIGHT
    • Threat
      • DUALS(4)
    • Vars
      • Q(e);CHECK::R(A)+S(B)
      • K(a);N_SPINQ(e),P-FLIGHT::R(A)+S(B),DCHECK
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