MESON Chess Problem Database

Problem Display
PID: 103585 (8/3B4/K7/4p3/8/2pk4/Q3N3/5N2 w - - 0 1)

Bogdanov, Evgeny Mikhailovich

Ivanov, Albert Fedorovich

64 Shakhmatnoe obozrenie, 1973

8/3B4/K7/4p3/8/2pk4/Q3N3/5N2

#2

5 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...e4
      • 2.Bb5#
  • Tries
    • 1.Ba4?
      • 1...c2
        • 2.Qxc2#
      • 1...e4
        • 2.Bb5#
      • 1...Ke4!
    • 1.Bg4?
      • 1...Ke4
        • 2.Qc4#
      • 1...c2
        • 2.Qd5#
      • 1...e4!
    • 1.Bc6?
      • 1...e4
        • 2.Bb5#
      • 1...c2!
    • 1.Qa4?
      • threat
        • 2.Sc1#
        • 2.Bb5#
      • 1...c2
        • 2.Bb5#
      • 1...Kxe2!
  • Keys
    • 1.Be6!
      • 1...Ke4
        • 2.Qd5#
      • 1...c2
        • 2.Qc4#
      • 1...e4
        • 2.Bc4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(c);SBLOCK::B(E)
  • Tries
    • Try
      • B(E);
      • Vars
        • P(a);::QAB1(B),XP(a)
        • P(c);SBLOCK::B(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(E);
      • Vars
        • K(b);S_FLIGHT::QAR2(B)
        • P(a);SBLOCK::QAR2(B)
      • Refutation
        • P(c);
    • Try
      • B(E);
      • Vars
        • P(c);SBLOCK::B(E)
      • Refutation
        • P(a);
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • P(a);::B(E)
      • Refutation
        • K(b);S_FLIGHT,XS(C)
  • Actual
    • B(E);
    • Vars
      • K(b);S_FLIGHT::QAB1(B)
      • P(a);::QAB1(B)
      • P(c);SBLOCK::B(E)
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