MESON Chess Problem Database

Problem Display
PID: 231592 (RB2B3/1k1N3R/8/p3P3/K7/8/8/8 w - - 0 1)

Stark, Erno

Ujsag, 1927

RB2B3/1k1N3R/8/p3P3/K7/8/8/8

#2

7 + 2

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Sc5+?
      • 1...Kb6
        • 2.Ba7#
      • 1...Kc8
        • 2.Bd6#
        • 2.Ba7#
        • 2.Bc7#
      • 1...Kxa8!
    • 1.Bd6?
      • 1...Kxa8
        • 2.Sb6#
      • 1...Kc6!
    • 1.Bh5?
      • 1...Kc6
        • 2.Bf3#
      • 1...Kxa8
        • 2.Bf3#
      • 1...Kc8!
    • 1.Bg6?
      • 1...Kc6
        • 2.Be4#
      • 1...Kxa8
        • 2.Be4#
      • 1...Kc8!
  • Keys
    • 1.Ba7!
      • 1...Ka6
        • 2.Sc5#
        • 2.Sb8#
      • 1...Kc6
        • 2.Sf6#
      • 1...Kc7
        • 2.Sc5#
        • 2.Sb6#
        • 2.Sf6#
        • 2.Sf8#
      • 1...Kxa8
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(b);P-FLIGHT::B(F)
      • Refutation
        • K(b);S_FLIGHT,XR(E)
    • Try
      • B(F);
      • Vars
        • K(b);S_FLIGHT,XR(E)::S(C)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(G);
      • Vars
        • K(b);S_FLIGHT::B(G)
        • K(b);S_FLIGHT,XR(E)::B(G)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(G);
      • Vars
        • K(b);S_FLIGHT::B(G)
        • K(b);S_FLIGHT,XR(E)::B(G)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • B(F);
    • Vars
      • K(b);S_FLIGHT::B(G)+S(C)
      • K(b);S_FLIGHT,XR(E)::S(C)
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