MESON Chess Problem Database

Problem Display
PID: 24243 (8/8/N7/6Q1/2pkp3/1p6/4K3/8 w - - 0 1)

Lincoln, Robert A

Australian Chess Problem Magazine, 1997

8/8/N7/6Q1/2pkp3/1p6/4K3/8

#2

3 + 4

2786 More Fun with Chess Miniatures 2000

SOLUTION

  • SOUND
  • Sets
    • 1...Kc3
      • 2.Qd2#
    • 1...c3
      • 2.Qc5#
  • Tries
    • 1.Sb4?
      • 1...Kc3
        • 2.Qd2#
      • 1...e3
        • 2.Qxe3#
      • 1...c3
        • 2.Qd5#
      • 1...b2!
    • 1.Qd8+?
      • 1...Kc3
        • 2.Qd2#
      • 1...Ke5!
    • 1.Qd5+?
      • 1...Kc3
        • 2.Qd2#
      • 1...Kxd5!
  • Keys
    • 1.Sc7!
      • threat
        • 2.Sb5#
      • 1...Kc3
        • 2.Qd2#
      • 1...e3
        • 2.Qxe3#
      • 1...c3
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(c);S_FLIGHT::QAB1(B)
    • P(b);::QAB1(B)
  • Tries
    • Try
      • S(C);
      • Vars
        • K(c);S_FLIGHT::QAB1(B)
        • P(d);::QAB1(B),XP(d)
        • P(b);SBLOCK::QAR1(B)
      • Refutation
        • P(a);
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT::QAB1(B)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT::QAB1(B)
      • Refutation
        • K(c);P-FLIGHT,XQ(B)
  • Actual
    • S(C);
    • Threat
      • S(C)
    • Vars
      • K(c);S_FLIGHT::QAB1(B)
      • P(d);::QAB1(B),XP(d)
      • P(b);SBLOCK::QAR1(B)
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