MESON Chess Problem Database

Problem Display
PID: 245303 (3N4/k1pN4/8/K7/8/7R/8/8 w - - 0 1)

Onkoud, Abdelaziz

Kudesnik, 1998

3N4/k1pN4/8/K7/8/7R/8/8

#2

4 + 2

15148 Sadier Collection 2021
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Tries
    • 1.Kb4?
      • threat
        • 2.Ra3#
      • 1...Ka6
        • 2.Ra3#
      • 1...Ka8
        • 2.Ra3#
      • 1...c5+!
    • 1.Kb5?
      • threat
        • 2.Ra3#
      • 1...Ka8
        • 2.Ra3#
      • 1...c6+!
    • 1.Rh6?
      • threat
        • 2.Ra6#
      • 1...Ka8
        • 2.Ra6#
      • 1...c6!
  • Keys
    • 1.Ra3!
      • threat
        • 2.Kb4#
        • 2.Kb5#
      • 1...Ka8
        • 2.Kb4#
        • 2.Kb5#
      • 1...c5
        • 2.Kb5#
      • 1...c6
        • 2.Kb4#

Anticipated by 85364(1990)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Threat
        • R(A)
      • Vars
        • K(a);P-FLIGHT::R(A)
      • Refutation
        • P(b);CHECK
    • Try
      • K(B);P-FLIGHT
      • Threat
        • R(A)
      • Vars
        • K(a);P-FLIGHT::R(A)
      • Refutation
        • P(b);CHECK
    • Try
      • R(A);
      • Threat
        • R1(A)
      • Vars
        • K(a);P-FLIGHT::R(A)
      • Refutation
        • P(b);
  • Actual
    • R(A);
    • Threat
      • DUALS(2)
    • Vars
      • P(b);::R(A)+K(B)
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