MESON Chess Problem Database

Problem Display
PID: 199341 (4B3/8/3K4/p7/1k6/p2Q4/4n3/8 w - - 0 1)

Lassahn, Holger

Freie Presse, 2001

(First published on Fri Jul 6 2001)

4B3/8/3K4/p7/1k6/p2Q4/4n3/8

#2

3 + 4

16210 Problemschach-Jahrbuch (2001) 2002

SOLUTION

  • SOUND
  • Tries
    • 1.Bf7?
      • threat
        • 2.Qc4#
        • 2.Qb3#
      • 1...Ka4
        • 2.Qc4#
        • 2.Qb3#
      • 1...Sc1
        • 2.Qc4#
      • 1...Sc3
        • 2.Qc4#
      • 1...Sd4
        • 2.Qc4#
      • 1...a2
        • 2.Qb3#
      • 1...a4!
  • Keys
    • 1.Ba4!
      • threat
        • 2.Qb3#
      • 1...Kxa4
        • 2.Qc4#
      • 1...Sc1
        • 2.Qd4#
      • 1...Sc3
        • 2.Qd4#
      • 1...Sd4
        • 2.Qxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(C);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::QAR1(A)
        • P(b);::QAR1(A)
      • Refutation
        • P(d);
  • Actual
    • B(C);
    • Threat
      • QAR1(A)
    • Vars
      • K(c);P-FLIGHT,XB(C)::QAR2(A)
      • S(a);N_GUARD::QAR2(A)
      • S(a);N_GUARD::QAR2(A),XS(a)
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