MESON Chess Problem Database

Problem Display
PID: 160153 (8/1K6/8/bkPp4/1pRB4/4P3/2Q5/3B1b2 w - - 0 1)

Lincoln, Robert A

Chess Life, 1990

8/1K6/8/bkPp4/1pRB4/4P3/2Q5/3B1b2

#2

7 + 5

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Bxc4
      • 2.Qa4#
    • 1...dxc4
      • 2.Qa4#
  • Tries
    • 1.Rxb4+?
      • 1...Kxb4
        • 2.Qb3#
        • 2.Qa4#
      • 1...Bxb4!
    • 1.Qg6?
      • threat
        • 2.Qa6#
      • 1...Kxc4
        • 2.Qa6#
      • 1...Bb6!
  • Keys
    • 1.Qa2!
      • threat
        • 2.Ba4#
      • 1...b3
        • 2.Qa4#
      • 1...Bb6
        • 2.Qa6#
      • 1...Bc7
        • 2.Qa6#
      • 1...Bd8
        • 2.Qa6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • B(a);SBLOCK,XR(D)::QAB1(B)
    • P(e);SBLOCK,XR(D)::QAB1(B)
  • Tries
    • Try
      • R(D);CHECK,XP(b)
      • Refutation
        • B(c);XR(D)
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • K(d);S_FLIGHT,XR(D)::QAB(B)
      • Refutation
        • B(c);
  • Actual
    • Q(B);
    • Threat
      • B(A)
    • Vars
      • P(b);::QAB1(B)
      • B(c);OGATE::QAB1(B)
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