MESON Chess Problem Database

Problem Display
PID: 157474 (8/7p/3p3B/4p3/4k1p1/N1P5/6Pp/5Q1K w - - 0 1)

Hoffmann, Fritz

Freie Presse, 1965

8/7p/3p3B/4p3/4k1p1/N1P5/6Pp/5Q1K

#2

6 + 6

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Qc4#
    • 1...g3
      • 2.Qf3#
    • 1...d5
      • 2.Qb1#
  • Tries
    • 1.Kxh2?
      • 1...Kd5
        • 2.Qc4#
      • 1...d5
        • 2.Qb1#
      • 1...g3+!
    • 1.Sb1?
      • 1...g3
        • 2.Qf3#
      • 1...d5
        • 2.Sd2#
      • 1...Kd5!
    • 1.Sc4?
      • 1...g3
        • 2.Qf3#
      • 1...d5
        • 2.Sd2#
        • 2.Sd6#
        • 2.Qb1#
      • 1...Kd5!
    • 1.Sb5?
      • 1...g3
        • 2.Qf3#
      • 1...d5
        • 2.Sd6#
        • 2.Qb1#
      • 1...Kd5!
    • 1.Qe2+?
      • 1...Kd5
        • 2.Qc4#
      • 1...Kf5!
    • 1.Qd1?
      • 1...d5
        • 2.Qc2#
        • 2.Qb1#
      • 1...g3
        • 2.Qf3#
      • 1...Kf5!
    • 1.Qf2?
      • 1...Kd3
        • 2.Qe3#
        • 2.Qc2#
      • 1...d5
        • 2.Qc2#
      • 1...g3
        • 2.Qf3#
      • 1...Kd5!
    • 1.Qf4+?
      • 1...Kd3
        • 2.Qe3#
        • 2.Qc4#
      • 1...Kd5
        • 2.Qc4#
      • 1...exf4!
    • 1.g3?
      • 1...Kd5
        • 2.Qc4#
      • 1...d5!
  • Keys
    • 1.Qf7!
      • 1...Kd3
        • 2.Qc4#
      • 1...d5
        • 2.Qxh7#
      • 1...g3
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(b);S_FLIGHT::QAB1(A)
    • P(c);N_GUARD::QAB1(A)
    • P(e);SBLOCK::QAB(A)
  • Tries
    • Try
      • K(B);P-FLIGHT,XP(a)
      • Vars
        • K(b);S_FLIGHT::QAB1(A)
        • P(e);SBLOCK::QAB(A)
      • Refutation
        • P(c);CHECK
    • Try
      • S(D);
      • Vars
        • P(c);N_GUARD::QAB1(A)
        • P(e);SBLOCK::S(D)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(D);
      • Vars
        • P(c);N_GUARD::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(D);
      • Vars
        • P(c);N_GUARD::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • P(c);N_GUARD::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • P(e);SBLOCK::QAB(A)
        • P(c);N_GUARD::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAB1(A)
      • Refutation
        • P(d);XQ(A)
    • Try
      • P(C);
      • Vars
        • K(b);S_FLIGHT::QAB1(A)
      • Refutation
        • P(e);
  • Actual
    • Q(A);
    • Vars
      • K(b);S_FLIGHT::QAB1(A)
      • P(e);SBLOCK::QAB(A),XP(f)
      • P(c);N_GUARD::QAB1(A)
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