MESON Chess Problem Database

Problem Display
PID: 234707 (3N4/1pQ5/k7/N7/8/3K4/8/8 w - - 0 1)

Lincoln, Robert A

Kudesnik, 2012

3N4/1pQ5/k7/N7/8/3K4/8/8

#2

4 + 2

15148 Sadier Collection 2021
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Ka7
      • 2.Qxb7#
  • Tries
    • 1.Sb3?
      • threat
        • 2.Qa5#
        • 2.Qxb7#
      • 1...Kb5
        • 2.Qa5#
      • 1...Ka7
        • 2.Qxb7#
      • 1...b5
        • 2.Sc5#
        • 2.Qa5#
        • 2.Qb7#
      • 1...b6!
    • 1.Saxb7?
      • threat
        • 2.Qa5#
      • 1...Kb5
        • 2.Qa5#
      • 1...Ka7!
  • Keys
    • 1.Sc4!
      • threat
        • 2.Qa5#
        • 2.Qb6#
        • 2.Qxb7#
      • 1...Kb5
        • 2.Qa5#
      • 1...Ka7
        • 2.Qxb7#
      • 1...b5
        • 2.Qa5#
        • 2.Qb6#
        • 2.Qb7#
      • 1...b6
        • 2.Qxb6#

Anticipated by 138224(2010)

FEATURES

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