MESON Chess Problem Database

Problem Display
PID: 108309 (8/1p5R/2k1K3/7R/8/8/5B2/6N1 w - - 0 1)

Froberg, Johan Hilding Laurentius

Piatnitsa, 1997

8/1p5R/2k1K3/7R/8/8/5B2/6N1

#2

5 + 2

5454 Near Snap 2009
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Se2?
      • 1...b6
        • 2.Sd4#
      • 1...b5!
    • 1.Ra5?
      • 1...b5
        • 2.Ra6#
      • 1...b6!
    • 1.Rb5?
      • threat
        • 2.Rb6#
      • 1...b6
        • 2.Rxb6#
      • 1...Kxb5!
    • 1.Rd5?
      • 1...b5
        • 2.Rd6#
      • 1...b6!
  • Keys
    • 1.Sf3!
      • 1...b5
        • 2.Se5#
      • 1...b6
        • 2.Sd4#

Anticipated by 92261(1967)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(A);
      • Vars
        • P(b);SBLOCK::S(A)
      • Refutation
        • P(b);
    • Try
      • R(C);
      • Vars
        • P(b);N_GUARD,SBLOCK::R(C)
      • Refutation
        • P(b);
    • Try
      • R(C);
      • Threat
        • R1(C)
      • Vars
        • P(b);::R1(C),XP(b)
      • Refutation
        • K(a);S_FLIGHT,XR(C)
    • Try
      • R(C);
      • Vars
        • P(b);SBLOCK::R1(C)
      • Refutation
        • P(b);
  • Actual
    • S(A);
    • Vars
      • P(b);SBLOCK::S(A)
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