MESON Chess Problem Database

Problem Display
PID: 260885 (8/1p1p4/1p6/nN1k1K2/8/1pQ5/1P4p1/6B1 w - - 0 1)

Nagler, Alois

Neue Zurcher Zeitung, 1943

8/1p1p4/1p6/nN1k1K2/8/1pQ5/1P4p1/6B1

#2

5 + 7

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Sc4
      • 2.Qf3#
    • 1...Sc6
      • 2.Qxb3#
    • 1...d6
      • 2.Sc7#
  • Tries
    • 1.Sa7?
      • threat
        • 2.Qd4#
        • 2.Qd3#
      • 1...Kd6
        • 2.Qe5#
      • 1...Sc6!
    • 1.Qd2+?
      • 1...Kc4
        • 2.Sa3#
        • 2.Sd6#
      • 1...Kc6!
    • 1.Qe5+?
      • 1...Kc6
        • 2.Sd4#
        • 2.Sa7#
      • 1...Kc4!
  • Keys
    • 1.Qc8!
      • 1...Sc6
        • 2.Qg8#
      • 1...Sc4
        • 2.Qxb7#
      • 1...d6
        • 2.Sc3#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(c);SBLOCK::QAB(C)
    • S(c);N_GUARD,SBLOCK::QAB(C),XP(b)
    • P(g);SBLOCK::S(D)
  • Tries
    • Try
      • S(D);
      • Threat
        • DUALS(2)
      • Vars
        • K(d);N_GUARD,P-FLIGHT::QAB1(C)
      • Refutation
        • S(c);
    • Try
      • Q(C);CHECK
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • Q(C);
    • Vars
      • S(c);SBLOCK::QAB(C)
      • S(c);N_GUARD,SBLOCK::QAB(C),XP(f)
      • P(g);SBLOCK::S(D)
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