MESON Chess Problem Database

Problem Display
PID: 38406 (KQ4R1/8/8/8/4N3/8/5p2/6bk w - - 0 1)

Petrosani, VD

Sp. Prize, De Waarheid, 1967

KQ4R1/8/8/8/4N3/8/5p2/6bk

#2

4 + 3

2012 Miniature Chess Problems from Many Countries 1981
3310 2345 Chess Problems 1997
4883 Still More Fun with Chess Miniatures 2002
133 The Problemist Supplement 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bh2
      • 2.Sxf2#
  • Tries
    • 1.Rh8+?
      • 1...Bh2
        • 2.Qxh2#
      • 1...Kg2!
    • 1.Qh2+?
      • 1...Bxh2
        • 2.Sxf2#
      • 1...Kxh2!
    • 1.Qg3?
      • threat
        • 2.Qg2#
      • 1...f1B
        • 2.Qxg1#
      • 1...f1Q!
  • Keys
    • 1.Qb2!
      • 1...Kh2
        • 2.Qh8#
      • 1...f1Q
        • 2.Sg3#
      • 1...f1S
        • 2.Qg2#
      • 1...f1B
        • 2.Sg3#
      • 1...f1R
        • 2.Sg3#
        • 2.Qg2#
      • 1...Bh2
        • 2.Sxf2#

FEATURES

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