MESON Chess Problem Database

Problem Display
PID: 135528 (8/4p3/2Q2p2/4k3/8/3pBK2/8/8 w - - 0 1)

Borasov, V

5th HM., Radianske slovo, 1972-1973

8/4p3/2Q2p2/4k3/8/3pBK2/8/8

#2

3 + 4

145 StrateGems 2009
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kf5
      • 2.Qe4#
    • 1...e6
      • 2.Qc5#
  • Tries
    • 1.Bc1?
      • 1...Kd4
        • 2.Bb2#
      • 1...Kf5
        • 2.Qe4#
      • 1...f5
        • 2.Bb2#
      • 1...e6
        • 2.Qc5#
      • 1...d2!
    • 1.Bf4+?
      • 1...Kf5
        • 2.Qe4#
      • 1...Kd4!
    • 1.Qd7?
      • threat
        • 2.Bd4#
        • 2.Bf4#
      • 1...f5
        • 2.Bd4#
      • 1...e6!
  • Keys
    • 1.Bd2!
      • 1...Kd4
        • 2.Bc3#
      • 1...Kf5
        • 2.Qe4#
      • 1...f5
        • 2.Bc3#
      • 1...e6
        • 2.Qc5#

This anticipates 171433(1998)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT::QAB1(C)
    • P(d);SBLOCK::QAR2(C)
  • Tries
    • Try
      • B(A);
      • Vars
        • K(b);S_FLIGHT::B(A)
        • K(b);P-FLIGHT::QAB1(C)
        • P(c);SBLOCK::B(A)
        • P(d);SBLOCK::QAR2(C)
      • Refutation
        • P(a);
    • Try
      • B(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAB1(C)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);::B(A)
      • Refutation
        • P(d);
  • Actual
    • B(A);
    • Vars
      • K(b);S_FLIGHT::B(A)
      • K(b);P-FLIGHT::QAB1(C)
      • P(c);SBLOCK::B(A)
      • P(d);SBLOCK::QAR2(C)
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