MESON Chess Problem Database

Problem Display
PID: 79168 (3B4/8/5R1p/6k1/8/8/5KNN/8 w - - 0 1)

Aleksandrov, Vladimir Aleksandrovich

Schach-Aktiv, 1992

3B4/8/5R1p/6k1/8/8/5KNN/8

#2

5 + 2

15148 Sadier Collection 2014
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Tries
    • 1.Kg3?
      • 1...h5
        • 2.Sf3#
      • 1...Kh5!
    • 1.Se1?
      • 1...Kh4
        • 2.Rxh6#
      • 1...h5
        • 2.Sef3#
      • 1...Kh5!
    • 1.Se3?
      • 1...Kh4
        • 2.Rxh6#
      • 1...h5
        • 2.Sf3#
      • 1...Kh5!
    • 1.Sf4?
      • threat
        • 2.Rf7#
        • 2.Rf8#
      • 1...Kh4
        • 2.Rf5#
        • 2.Ra6#
        • 2.Rb6#
        • 2.Rc6#
        • 2.Rd6#
        • 2.Re6#
        • 2.Rg6#
        • 2.Rxh6#
        • 2.Rf7#
        • 2.Rf8#
      • 1...h5!
    • 1.Rf3+?
      • 1...Kh5
        • 2.Sf4#
      • 1...Kg6!
    • 1.Ra6+?
      • 1...Kh5
        • 2.Sf4#
      • 1...Kf5!
    • 1.Rb6+?
      • 1...Kh5
        • 2.Sf4#
      • 1...Kf5!
    • 1.Rc6+?
      • 1...Kh5
        • 2.Sf4#
      • 1...Kf5!
    • 1.Rd6+?
      • 1...Kh5
        • 2.Sf4#
      • 1...Kf5!
    • 1.Re6+?
      • 1...Kh5
        • 2.Sf4#
      • 1...Kf5!
    • 1.Rf7+?
      • 1...Kh5
        • 2.Sf4#
      • 1...Kg6!
    • 1.Rf8+?
      • 1...Kh5
        • 2.Sf4#
      • 1...Kg6!
  • Keys
    • 1.Sh4!
      • threat
        • 2.Rf5#
      • 1...Kxh4
        • 2.Rxh6#
      • 1...Kh5
        • 2.Rf5#
      • 1...h5
        • 2.S4f3#

Anticipated by 240620(1980)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Vars
        • P(b);SBLOCK::S(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(B);
      • Vars
        • K(a);S_FLIGHT::B(E)+R(D),DCHECK,XP(b)
        • P(b);SBLOCK::S(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(B);
      • Vars
        • K(a);S_FLIGHT::B(E)+R(D),DCHECK,XP(b)
        • P(b);SBLOCK::S(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Refutation
        • P(b);
    • Try
      • R(D);CHECK
      • Vars
        • K(a);P-FLIGHT::S(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(D);CHECK
      • Vars
        • K(a);P-FLIGHT::S(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(D);CHECK
      • Vars
        • K(a);P-FLIGHT::S(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(D);CHECK
      • Vars
        • K(a);P-FLIGHT::S(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(D);CHECK
      • Vars
        • K(a);P-FLIGHT::S(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(D);CHECK
      • Vars
        • K(a);P-FLIGHT::S(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(D);CHECK
      • Vars
        • K(a);P-FLIGHT::S(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(D);CHECK
      • Vars
        • K(a);P-FLIGHT::S(B)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • S(B);
    • Threat
      • B(E)+R(D),DCHECK
    • Vars
      • K(a);S_FLIGHT,XS(B)::B(E)+R(D),DCHECK,XP(b)
      • K(a);P-FLIGHT::R(D)
      • P(b);SBLOCK::S(B)
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