MESON Chess Problem Database

Problem Display
PID: 258136 (8/8/8/4R2p/6Pk/8/7K/3R4 w - - 0 1)

Nagovitsin, Eduard Nikolaevich

Astafyeva-30 JT (Kudesnik), 2021

8/8/8/4R2p/6Pk/8/7K/3R4

#2

4 + 2

5454 Near Snap 2022

SOLUTION

  • SOUND
  • Tries
    • 1.Rh1?
      • 1...hxg4
        • 2.Kg2#
      • 1...Kxg4!
    • 1.Rdd5?
      • 1...hxg4
        • 2.Rh5#
      • 1...Kxg4!
    • 1.Rd6?
      • 1...hxg4
        • 2.Rh6#
      • 1...Kxg4!
    • 1.Rd7?
      • 1...hxg4
        • 2.Rh7#
      • 1...Kxg4!
    • 1.Rd8?
      • 1...hxg4
        • 2.Rh8#
      • 1...Kxg4!
  • Keys
    • 1.Kg2!
      • 1...Kxg4
        • 2.Rd4#
      • 1...hxg4
        • 2.Rh1#

Anticipated by 159776(1987)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(A);
      • Vars
        • P(b);SBLOCK,XP(C)::R(A)+K(B)
      • Refutation
        • K(a);P-FLIGHT,XP(C)
    • Try
      • R(A);
      • Vars
        • P(b);SBLOCK,XP(C)::R1(D)
      • Refutation
        • K(a);P-FLIGHT,XP(C)
    • Try
      • R(A);
      • Vars
        • P(b);OGATEB,SBLOCK,XP(C)::R(A)
      • Refutation
        • K(a);P-FLIGHT,XP(C)
    • Try
      • R(A);
      • Vars
        • P(b);OGATEB,SBLOCK,XP(C)::R(A)
      • Refutation
        • K(a);P-FLIGHT,XP(C)
    • Try
      • R(A);
      • Vars
        • P(b);OGATEB,SBLOCK,XP(C)::R(A)
      • Refutation
        • K(a);P-FLIGHT,XP(C)
  • Actual
    • K(B);P-FLIGHT
    • Vars
      • K(a);OGATEB,P-FLIGHT,XP(C)::R(A)
      • P(b);SBLOCK,XP(C)::R(A)
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