MESON Chess Problem Database

Problem Display
PID: 138224 (7N/8/5Qp1/4p2k/4K2N/8/8/8 w - - 0 1)

Lincoln, Robert A

The Problemist Supplement, 2010

7N/8/5Qp1/4p2k/4K2N/8/8/8

#2

4 + 3

5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kh6
      • 2.Qxg6#
  • Tries
    • 1.Sg2?
      • threat
        • 2.Qh4#
        • 2.Qxg6#
      • 1...Kg4
        • 2.Qh4#
      • 1...Kh6
        • 2.Qxg6#
      • 1...g5!
    • 1.S4xg6?
      • threat
        • 2.Qh4#
      • 1...Kg4
        • 2.Qh4#
      • 1...Kh6!
    • 1.Sf7?
      • threat
        • 2.Qg5#
      • 1...g5
        • 2.Qxg5#
      • 1...Kg4!
  • Keys
    • 1.Sf3!
      • threat
        • 2.Qh4#
        • 2.Qg5#
        • 2.Qxg6#
      • 1...Kg4
        • 2.Qh4#
      • 1...Kh6
        • 2.Qxg6#
      • 1...g5
        • 2.Qxg5#

This anticipates 234707(2012)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT,P_SPINP(c)::QAR1(C),XP(c)
  • Tries
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Vars
        • K(b);S_FLIGHT::QAR1(C)
        • K(b);P-FLIGHT,P_SPINP(c)::QAR1(C),XP(c)
      • Refutation
        • P(c);
    • Try
      • S(B);XP(c)
      • Threat
        • QAR1(C)
      • Vars
        • K(b);S_FLIGHT::QAR1(C)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • S(D);
      • Threat
        • QAR1(C)
      • Vars
        • P(c);::QAR1(C),XP(c)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • S(B);
    • Threat
      • DUALS(3)
    • Vars
      • K(b);S_FLIGHT::QAR1(C)
      • K(b);P-FLIGHT,P_SPINP(c)::QAR1(C),XP(c)
      • P(c);::QAR1(C),XP(c)
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