MESON Chess Problem Database

Problem Display
PID: 120753 (8/BQ6/1R1p2p1/3B2K1/8/7P/6p1/5NkN w - - 0 1)

Vogel, Peter

Source?, 0000

8/BQ6/1R1p2p1/3B2K1/8/7P/6p1/5NkN

#2

8 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...gxf1B
      • 2.Rb2#
    • 1...gxh1Q
      • 2.Rb1#
    • 1...gxh1B
      • 2.Rb1#
    • 1...gxh1R
      • 2.Rb1#
  • Tries
    • 1.Rb2+?
      • 1...Kxh1
        • 2.Bxg2#
      • 1...Kxf1!
    • 1.Rb3+?
      • 1...Kxh1
        • 2.Bxg2#
      • 1...Kxf1!
    • 1.Rb4+?
      • 1...Kxh1
        • 2.Bxg2#
      • 1...Kxf1!
    • 1.Rb5+?
      • 1...Kxh1
        • 2.Bxg2#
      • 1...Kxf1!
    • 1.Ra6+?
      • 1...Kxh1
        • 2.Bxg2#
      • 1...Kxf1!
    • 1.Rxd6+?
      • 1...Kxh1
        • 2.Bxg2#
      • 1...Kxf1!
  • Keys
    • 1.Rb1+!
      • 1...Kxh1
        • 2.Bxg2#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • P(b);SBLOCK,XS(A)::B(G)+R(F)
    • P(b);XS(B)::B(G)+R(F)
  • Tries
    • Try
      • R(F);CHECK
      • Vars
        • K(a);P-FLIGHT,P_SPINP(b),XS(B)::B(D),XP(b)
      • Refutation
        • K(a);P-FLIGHT,XS(A)
    • Try
      • R(F);CHECK
      • Vars
        • K(a);P-FLIGHT,P_SPINP(b),XS(B)::B(D),XP(b)
      • Refutation
        • K(a);P-FLIGHT,XS(A)
    • Try
      • R(F);CHECK
      • Vars
        • K(a);P-FLIGHT,P_SPINP(b),XS(B)::B(D),XP(b)
      • Refutation
        • K(a);P-FLIGHT,XS(A)
    • Try
      • R(F);CHECK
      • Vars
        • K(a);P-FLIGHT,P_SPINP(b),XS(B)::B(D),XP(b)
      • Refutation
        • K(a);P-FLIGHT,XS(A)
    • Try
      • R(F);CHECK
      • Vars
        • K(a);P-FLIGHT,P_SPINP(b),XS(B)::B(D),XP(b)
      • Refutation
        • K(a);P-FLIGHT,XS(A)
    • Try
      • R(F);CHECK,XP(c)
      • Vars
        • K(a);P-FLIGHT,P_SPINP(b),XS(B)::B(D),XP(b)
      • Refutation
        • K(a);P-FLIGHT,XS(A)
  • Actual
    • R(F);CHECK
    • Vars
      • K(a);P-FLIGHT,P_SPINP(b),XS(B)::B(D),XP(b)
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