MESON Chess Problem Database

Problem Display
PID: 227611 (2B2b2/6pQ/3P1P2/6k1/8/6P1/6K1/8 w - - 0 1)

Ivanova, V

Shakhmaty, 1926

2B2b2/6pQ/3P1P2/6k1/8/6P1/6K1/8

#2

6 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kxf6
      • 2.Qf5#
    • 1...g6
      • 2.Qh4#
  • Tries
    • 1.Bf5?
      • threat
        • 2.Qg6#
      • 1...g6
        • 2.Qxg6#
      • 1...Kxf6!
    • 1.Qh5+?
      • 1...Kxf6
        • 2.Qf5#
      • 1...Kxh5!
    • 1.Qxg7+?
      • 1...Kh5
        • 2.Bg4#
      • 1...Bxg7!
  • Keys
    • 1.Bg4!
      • 1...Kxg4
        • 2.Qg6#
      • 1...Kxf6
        • 2.Qf5#
      • 1...Bxd6
        • 2.Qxg7#
      • 1...gxf6
        • 2.Qh5#
      • 1...Be7
        • 2.Qxg7#
      • 1...g6
        • 2.Qh4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT,XP(D)::QAR1(E)
    • P(b);SBLOCK::QAB1(E)
  • Tries
    • Try
      • B(F);
      • Threat
        • QAR1(E)
      • Vars
        • P(b);::QAR1(E),XP(b)
      • Refutation
        • K(a);S_FLIGHT,XP(D)
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT,XP(D)::QAR1(E)
      • Refutation
        • K(a);P-FLIGHT,XQ(E)
    • Try
      • Q(E);CHECK,XP(b)
      • Vars
        • K(a);P-FLIGHT::B(F)
      • Refutation
        • B(c);XQ(E)
  • Actual
    • B(F);
    • Vars
      • K(a);P-FLIGHT,XB(F)::QAR2(E)
      • K(a);S_FLIGHT,XP(D)::QAR1(E)
      • B(c);N_GUARD,XP(C)::QAR2(E),XP(b)
      • P(b);SBLOCK,XP(D)::QAR1(E)
      • B(c);N_GUARD::QAR2(E),XP(b)
      • P(b);SBLOCK::QAB1(E)
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