MESON Chess Problem Database

Problem Display
PID: 77279 (3N4/8/7p/1nPk4/8/3KQ3/8/8 w - - 0 1)

Albrecht, Hermann

Neue Leipziger Zeitung, 1936

3N4/8/7p/1nPk4/8/3KQ3/8/8

#2

4 + 3

3713 Snap 2008
15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Sa3
      • 2.Qd4#
    • 1...Sc3
      • 2.Qd4#
    • 1...Sd4
      • 2.Qxd4#
    • 1...Sd6
      • 2.Qd4#
    • 1...Sa7
      • 2.Qd4#
    • 1...Sc7
      • 2.Qd4#
    • 1...h5
      • 2.Qg5#
  • Tries
    • 1.Qg1?
      • 1...Sd4
        • 2.Qxd4#
      • 1...Sc3
        • 2.Qd4#
      • 1...Sa3
        • 2.Qd4#
      • 1...Sd6
        • 2.Qd4#
      • 1...Sa7
        • 2.Qd4#
      • 1...Sc7
        • 2.Qd4#
      • 1...h5
        • 2.Qg5#
      • 1...Ke5!
    • 1.Qf2?
      • threat
        • 2.Qf5#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Sd6
        • 2.Qd4#
      • 1...Ke5!
    • 1.Qf4?
      • threat
        • 2.Qf5#
      • 1...Sd4
        • 2.Qd6#
        • 2.Qxd4#
      • 1...Sd6
        • 2.Qxd6#
        • 2.Qd4#
      • 1...Kxc5!
    • 1.Qxh6?
      • threat
        • 2.Qg5#
        • 2.Qh5#
      • 1...Ke5
        • 2.Qg5#
      • 1...Sd4
        • 2.Qd6#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Kxc5!
    • 1.Qg3?
      • 1...Sc3
        • 2.Qd6#
      • 1...Sa3
        • 2.Qd6#
      • 1...Sd4
        • 2.Qd6#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Sa7
        • 2.Qd6#
      • 1...Sc7
        • 2.Qd6#
      • 1...h5
        • 2.Qg5#
      • 1...Kxc5!
  • Keys
    • 1.Qe7!
      • 1...Sd6
        • 2.Qxd6#
      • 1...Sc3
        • 2.Qd6#
      • 1...Sa3
        • 2.Qd6#
      • 1...Sd4
        • 2.Qd6#
      • 1...Sa7
        • 2.Qd6#
      • 1...Sc7
        • 2.Qd6#
      • 1...h5
        • 2.Qg5#

Anticipated by 6151(1927)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 6
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAR1(B)
    • S(a);N_GUARD::QAR1(B),XS(a)
    • P(c);N_GUARD::QAR(B)
  • Tries
    • Try
      • Q(B);
      • Vars
        • S(a);N_GUARD::QAR1(B),XS(a)
        • S(a);N_GUARD::QAR1(B)
        • P(c);N_GUARD::QAR(B)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);
      • Threat
        • QAR2(B)
      • Vars
        • S(a);N_GUARD::QAR1(B),XS(a)
        • S(a);N_GUARD::QAR1(B)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);
      • Threat
        • QAR2(B)
      • Refutation
        • K(b);P-FLIGHT,XP(C)
    • Try
      • Q(B);XP(c)
      • Threat
        • DUALS(2)
      • Vars
        • K(b);P-FLIGHT::QAR2(B)
        • S(a);N_GUARD::QAR1(B)
        • S(a);N_GUARD::QAR1(B),XS(a)
      • Refutation
        • K(b);P-FLIGHT,XP(C)
    • Try
      • Q(B);
      • Vars
        • S(a);N_GUARD::QAR1(B)
        • S(a);N_GUARD::QAR1(B),XS(a)
        • P(c);N_GUARD::QAR(B)
      • Refutation
        • K(b);P-FLIGHT,XP(C)
  • Actual
    • Q(B);
    • Vars
      • S(a);N_GUARD::QAR1(B),XS(a)
      • S(a);N_GUARD::QAR1(B)
      • P(c);N_GUARD::QAR(B)
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