MESON Chess Problem Database

Problem Display
PID: 158718 (K7/2b2pQ1/kp6/8/8/8/1R6/8 w - - 0 1)

Lincoln, Robert A

The Problemist Supplement, 2015

K7/2b2pQ1/kp6/8/8/8/1R6/8

#2

3 + 4

SOLUTION

  • SOUND
  • Tries
    • 1.Qd4?
      • threat
        • 2.Qa4#
      • 1...b5
        • 2.Qa7#
      • 1...Ka5!
    • 1.Qe5?
      • threat
        • 2.Ra2#
        • 2.Qb5#
      • 1...b5
        • 2.Qxb5#
      • 1...Bd6
        • 2.Qb5#
      • 1...Bxe5!
    • 1.Qxf7?
      • threat
        • 2.Qa2#
      • 1...Ka5
        • 2.Qa2#
      • 1...Bd6
        • 2.Qa7#
      • 1...b5!
  • Keys
    • 1.Qg1!
      • threat
        • 2.Qa1#
      • 1...Ka5
        • 2.Qa1#
      • 1...Bd6
        • 2.Qxb6#
      • 1...b5
        • 2.Qa7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAR2(B)
      • Vars
        • P(b);OGATE::QAR1(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);::QAB1(B),XP(b)
        • B(c);::QAB1(B)
      • Refutation
        • B(c);XQ(B)
    • Try
      • Q(B);XP(d)
      • Threat
        • QAR(B)
      • Vars
        • K(a);P-FLIGHT::QAR(B)
        • B(c);OGATE::QAR1(B)
      • Refutation
        • P(b);
  • Actual
    • Q(B);
    • Threat
      • QAR(B)
    • Vars
      • K(a);P-FLIGHT::QAR(B)
      • B(c);N_GUARD::QAR1(B),XP(b)
      • P(b);OGATE::QAR1(B)
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