MESON Chess Problem Database

Problem Display
PID: 235727 (5Q2/8/1P6/2P2K2/8/4R1p1/5Pp1/3B1krn w - - 0 1)

Borisenko, Alexey Ivanovich

Zadachi i Etyudi, 2002

5Q2/8/1P6/2P2K2/8/4R1p1/5Pp1/3B1krn

#2

7 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Kxf2
      • 2.Ke4#
  • Tries
    • 1.Bc2?
      • 1...Kxf2
        • 2.Ke4#
      • 1...gxf2
        • 2.Bd3#
      • 1...Sxf2!
    • 1.Bb3?
      • 1...Kxf2
        • 2.Ke4#
      • 1...gxf2
        • 2.Bc4#
      • 1...Sxf2!
    • 1.Ba4?
      • 1...Kxf2
        • 2.Ke4#
      • 1...gxf2
        • 2.Bb5#
      • 1...Sxf2!
    • 1.Qd6?
      • 1...Kxf2
        • 2.Qf4#
      • 1...gxf2
        • 2.Qd3#
      • 1...Sxf2!
    • 1.Qe7?
      • 1...Kxf2
        • 2.Rf3#
      • 1...Sxf2
        • 2.Re1#
      • 1...gxf2!
    • 1.Qf7?
      • 1...Kxf2
        • 2.Ke4#
      • 1...gxf2
        • 2.Qc4#
      • 1...Sxf2!
    • 1.Qa8?
      • 1...Kxf2
        • 2.Qf3#
      • 1...gxf2
        • 2.Qa6#
      • 1...Sxf2!
  • Keys
    • 1.Qe8!
      • 1...Kxf2
        • 2.Rf3#
      • 1...Sxf2
        • 2.Re1#
      • 1...gxf2
        • 2.Qb5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT,XP(B)::QAR(G)+K(E)
  • Tries
    • Try
      • B(A);
      • Vars
        • K(a);P-FLIGHT,XP(B)::QAR(G)+K(E)
        • P(e);SBLOCK,XP(B)::B(A)
      • Refutation
        • S(c);XP(B)
    • Try
      • B(A);
      • Vars
        • K(a);P-FLIGHT,XP(B)::QAR(G)+K(E)
        • P(e);SBLOCK,XP(B)::B(A)
      • Refutation
        • S(c);XP(B)
    • Try
      • B(A);
      • Vars
        • K(a);P-FLIGHT,XP(B)::QAR(G)+K(E)
        • P(e);SBLOCK,XP(B)::B(A)
      • Refutation
        • S(c);XP(B)
    • Try
      • Q(G);
      • Vars
        • K(a);OGATEB,P-FLIGHT,XP(B)::QAR2(G)
        • P(e);SBLOCK,XP(B)::QAB(G)
      • Refutation
        • S(c);XP(B)
    • Try
      • Q(G);
      • Vars
        • K(a);OGATEB,P-FLIGHT,XP(B)::R1(C)
        • S(c);SBLOCK,XP(B)::R1(C)
      • Refutation
        • P(e);XP(B)
    • Try
      • Q(G);
      • Vars
        • K(a);P-FLIGHT,XP(B)::QAR(G)+K(E)
        • P(e);SBLOCK,XP(B)::QAB(G)
      • Refutation
        • S(c);XP(B)
    • Try
      • Q(G);
      • Vars
        • K(a);OGATEB,P-FLIGHT,XP(B)::QAR1(G)
        • P(e);SBLOCK,XP(B)::QAB(G)
      • Refutation
        • S(c);XP(B)
  • Actual
    • Q(G);
    • Vars
      • K(a);OGATEB,P-FLIGHT,XP(B)::R1(C)
      • S(c);SBLOCK,XP(B)::R1(C)
      • P(e);SBLOCK,XP(B)::QAB(G)
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