MESON Chess Problem Database

Problem Display
PID: 190923 (4q3/1n1pP1p1/1Ppk4/2p1R3/r1p1Qp2/p1B5/K4N2/5n1r w - - 0 1)

Witt, Andreas

Neue Osnabrucker Zeitung, 2001

(First published on Sat Apr 28 2001)

4q3/1n1pP1p1/1Ppk4/2p1R3/r1p1Qp2/p1B5/K4N2/5n1r

#2

7 + 13

16210 Problemschach-Jahrbuch (2001) 2002

SOLUTION

  • SOUND
  • Sets
    • 1...Qg6
      • 2.Qxg6#
    • 1...Qa8
      • 2.Qg6#
    • 1...Qb8
      • 2.Qg6#
    • 1...Qc8
      • 2.Qg6#
    • 1...Qd8
      • 2.Qg6#
    • 1...Qf8
      • 2.exf8Q#
      • 2.exf8B#
    • 1...Qh8
      • 2.Qg6#
  • Tries
    • 1.Qe2?
      • threat
        • 2.Se4#
      • 1...Sd2
        • 2.Qxd2#
      • 1...Sg3
        • 2.Qd2#
      • 1...Qg6!
  • Keys
    • 1.Qc2!
      • threat
        • 2.Se4#
      • 1...Qg6
        • 2.Qxg6#
      • 1...Sd2
        • 2.Qxd2#
      • 1...Sg3
        • 2.Qd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • Q(m);N_GUARD::QAR(D),XQ(m)
    • Q(m);N_GUARD::QAR(D)
    • Q(m);OGATE::PXQ(m)=Q
  • Tries
    • Try
      • Q(D);
      • Threat
        • S(B)
      • Vars
        • S(a);N_GUARD::QAR(D),XS(a)
        • S(a);N_GUARD::QAR(D)
      • Refutation
        • Q(m);
  • Actual
    • Q(D);
    • Threat
      • S(B)
    • Vars
      • Q(m);N_GUARD::QAR(D),XQ(m)
      • S(a);N_GUARD::QAR(D),XS(a)
      • S(a);N_GUARD::QAR(D)
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