MESON Chess Problem Database

Problem Display
PID: 243571 (K7/4N3/4N3/2P5/3PkP2/1p1ppb2/4n3/4Q2B w - - 0 1)

Dimitrov, Nikolai

Shakhmaty (Riga), 1963

K7/4N3/4N3/2P5/3PkP2/1p1ppb2/4n3/4Q2B

#2

8 + 6

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bxh1
      • 2.Qxh1#
    • 1...Bg2
      • 2.Bxg2#
    • 1...d2
      • 2.Qb1#
  • Tries
    • 1.Qb4?
      • threat
        • 2.Qb7#
      • 1...Sxd4
        • 2.Qxd4#
      • 1...Sxf4
        • 2.Sg5#
      • 1...Sc3
        • 2.d5#
      • 1...d2!
  • Keys
    • 1.Qh4!
      • threat
        • 2.Qh7#
      • 1...Bxh1
        • 2.Qxh1#
      • 1...Sxd4
        • 2.Sg5#
      • 1...Sxf4
        • 2.Qxf4#
      • 1...Bg2
        • 2.Bxg2#
      • 1...Sg3
        • 2.f5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • B(e);N_SPINB(e),OGATE,XB(B)::QAB(A),XB(e)
    • B(e);OGATEB::B(B),XB(e)
    • P(c);OGATEB::QAB(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB(A)
      • Vars
        • S(a);OGATE,P_SPINS(a),XP(C)::QAR1(A),XS(a)
        • S(a);SBLOCK,XP(D)::S(F)
        • S(a);N_GUARD::QAR(A)+P(C)
      • Refutation
        • P(c);
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • B(e);N_SPINB(e),OGATE,XB(B)::QAB(A),XB(e)
      • S(a);SBLOCK,XP(C)::S(F)
      • S(a);OGATE,P_SPINS(a),XP(D)::QAR1(A),XS(a)
      • B(e);OGATEB::B(B),XB(e)
      • S(a);N_GUARD::QAR(A)+P(D)
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