MESON Chess Problem Database

Problem Display
PID: 106500 (8/3p4/7Q/6BN/6p1/7k/5b2/7K w - - 0 1)

Beszczynski, Jan

Comm., Praca, 1954

(First published on Fri Oct 1 1954)

8/3p4/7Q/6BN/6p1/7k/5b2/7K

#2

4 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bg3
      • 2.Sf4#
    • 1...g3
      • 2.Sf6#
  • Tries
    • 1.Sf6+?
      • 1...Bh4
        • 2.Qxh4#
      • 1...Kg3!
    • 1.Sg7+?
      • 1...Bh4
        • 2.Qxh4#
      • 1...Kg3!
    • 1.Bf4?
      • threat
        • 2.Sg3#
      • 1...Kh4
        • 2.Sg3#
        • 2.Sf6#
        • 2.Sg7#
      • 1...g3
        • 2.Sf6#
      • 1...Bg3
        • 2.Sxg3#
      • 1...Bh4!
  • Keys
    • 1.Qd6!
      • threat
        • 2.Qh2#
      • 1...g3
        • 2.Qxd7#
      • 1...Bg1
        • 2.Qg3#
      • 1...Bg3
        • 2.Qxg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • B(a);SBLOCK::QAR(D)+S(C),DCHECK
    • P(c);SBLOCK,S_CUTB(a)::QAR(D)+S(C)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAR1(D),XB(a)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • S(C);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAR1(D),XB(a)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • B(B);
      • Threat
        • QAR(D)+S(C)
      • Vars
        • P(c);S_CUTB(a)::QAR(D)+S(C)
        • B(a);::QAR(D)+S(C),XB(a)
      • Refutation
        • B(a);
  • Actual
    • Q(D);
    • Threat
      • QAR1(D)
    • Vars
      • P(c);OGATEB::QAB(D),XP(d)
      • B(a);N_GUARD::QAR1(D)
      • B(a);N_GUARD::QAR1(D),XB(a)
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