MESON Chess Problem Database

Problem Display
PID: 87695 (Rn6/8/n7/8/8/8/1K2NR2/7k w - - 0 1)

Nesic, Milivoj S

Buletin Problemistic, 1990

Rn6/8/n7/8/8/8/1K2NR2/7k

#2

4 + 3

5454 Near Snap 2009
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sb4
      • 2.Ra1#
    • 1...Sc5
      • 2.Ra1#
    • 1...Sc7
      • 2.Ra1#
    • 1...Sc6
      • 2.Rh8#
    • 1...Sd7
      • 2.Rh8#
  • Tries
    • 1.Kc2?
      • 1...Sc5
        • 2.Ra1#
      • 1...Sc7
        • 2.Ra1#
      • 1...Sc6
        • 2.Rh8#
      • 1...Sd7
        • 2.Rh8#
      • 1...Sb4+!
    • 1.Kb3?
      • 1...Sb4
        • 2.Ra1#
      • 1...Sc7
        • 2.Ra1#
      • 1...Sc6
        • 2.Rh8#
      • 1...Sd7
        • 2.Rh8#
      • 1...Sc5+!
    • 1.Rxa6?
      • threat
        • 2.Ra1#
        • 2.Rh6#
      • 1...Sc6
        • 2.Ra1#
      • 1...Sxa6!
    • 1.Ra7?
      • threat
        • 2.Rh7#
      • 1...Sc7
        • 2.Ra1#
      • 1...Sd7!
  • Keys
    • 1.Kc3!
      • 1...Sc5
        • 2.Ra1#
      • 1...Sb4
        • 2.Ra1#
      • 1...Sc7
        • 2.Ra1#
      • 1...Sc6
        • 2.Rh8#
      • 1...Sd7
        • 2.Rh8#

Anticipated by 149620(1922), 17646(1948)

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(b);OGATE::R(D)
    • S(c);OGATE::R(D)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • S(b);OGATE::R(D)
        • S(c);OGATE::R(D)
      • Refutation
        • S(b);CHECK
    • Try
      • K(A);P-FLIGHT
      • Vars
        • S(b);OGATE::R(D)
        • S(c);OGATE::R(D)
      • Refutation
        • S(b);CHECK
    • Try
      • R(D);XS(b)
      • Threat
        • DUALS(2)
      • Vars
        • S(c);::R(D)
      • Refutation
        • S(c);XR(D)
    • Try
      • R(D);
      • Threat
        • R(D)
      • Vars
        • S(b);OGATE::R(D)
      • Refutation
        • S(c);
  • Actual
    • K(A);S_FLIGHT
    • Vars
      • S(b);OGATE::R(D)
      • S(c);OGATE::R(D)
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