MESON Chess Problem Database

Problem Display
PID: 173603 (qB6/8/8/3B4/4N3/8/4NK2/7k w - - 0 1)

Boros, Sandor

Shakhmaty v SSSR, 1937

qB6/8/8/3B4/4N3/8/4NK2/7k

#2

5 + 2

6490 yacpdb 2018
3713 Snap 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qa1
      • 2.Sd2#
      • 2.S4c3#
      • 2.Sc5#
      • 2.Sg5#
      • 2.Sf6#
    • 1...Qa3
      • 2.S4c3#
    • 1...Qa5
      • 2.Sc5#
    • 1...Qa6
      • 2.Sd2#
      • 2.S4c3#
      • 2.Sc5#
      • 2.Sg5#
      • 2.Sf6#
    • 1...Qa7+
      • 2.Sc5#
  • Keys
    • 1.Kg3!
      • threat
        • 2.Sf2#
      • 1...Qa3+
        • 2.S4c3#
      • 1...Qxb8+
        • 2.Sd6#

This anticipates 211351(1986)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • Q(b);N_GUARD,SBLOCK::B(D)+S(C)
    • Q(b);N_GUARD::B(D)+S(C)
    • Q(b);CHECK,N_GUARD::B(D)+S(C)
  • Actual
    • K(B);S_FLIGHT
    • Threat
      • B(D)+S(C),DCHECK
    • Vars
      • Q(b);CHECK,N_GUARD,SBLOCK::B(D)+S(C)
      • Q(b);CHECK,N_GUARD,XB(E)::B(D)+S(C)
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