MESON Chess Problem Database

Problem Display
PID: 231033 (8/4p3/4B1p1/2Q5/4pk2/8/5K2/8 w - - 0 1)

von Gottschall, Hermann

Deutsche Schachzeitung, 1930

8/4p3/4B1p1/2Q5/4pk2/8/5K2/8

#2

3 + 4

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...e3+
      • 2.Qxe3#
    • 1...g5
      • 2.Qf5#
      • 2.Qc7#
  • Tries
    • 1.Bh3?
      • 1...e3+
        • 2.Qxe3#
      • 1...e5
        • 2.Qe3#
      • 1...g5
        • 2.Qf5#
      • 1...e6!
    • 1.Bd7?
      • 1...e3+
        • 2.Qxe3#
      • 1...e5
        • 2.Qe3#
      • 1...g5
        • 2.Qf5#
      • 1...e6!
    • 1.Bc8?
      • 1...e3+
        • 2.Qxe3#
      • 1...e5
        • 2.Qe3#
      • 1...g5
        • 2.Qf5#
      • 1...e6!
    • 1.Qc1+?
      • 1...e3+
        • 2.Qxe3#
      • 1...Ke5!
    • 1.Qc3?
      • threat
        • 2.Qg3#
      • 1...e3+
        • 2.Qxe3#
      • 1...Kg5!
    • 1.Qa5?
      • 1...g5
        • 2.Qc7#
        • 2.Qf5#
      • 1...e3+!
    • 1.Qb5?
      • 1...g5
        • 2.Qf5#
        • 2.Qb8#
      • 1...e3+!
    • 1.Qd5?
      • 1...g5
        • 2.Qf5#
      • 1...e3+!
  • Keys
    • 1.Ke2!
      • 1...Kg3
        • 2.Qf2#
      • 1...e3
        • 2.Qxe3#
      • 1...g5
        • 2.Qc7#

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(a);CHECK::QAB1(B),XP(a)
  • Tries
    • Try
      • B(C);
      • Vars
        • P(a);CHECK::QAB1(B),XP(a)
        • P(d);SBLOCK::QAB1(B)
        • P(c);N_GUARD::QAR1(B)
      • Refutation
        • P(d);
    • Try
      • B(C);
      • Vars
        • P(a);CHECK::QAB1(B),XP(a)
        • P(d);SBLOCK::QAB1(B)
        • P(c);N_GUARD::QAR1(B)
      • Refutation
        • P(d);
    • Try
      • B(C);
      • Vars
        • P(a);CHECK::QAB1(B),XP(a)
        • P(d);SBLOCK::QAB1(B)
        • P(c);N_GUARD::QAR1(B)
      • Refutation
        • P(d);
    • Try
      • Q(B);CHECK
      • Vars
        • P(a);CHECK,P_SPINP(a)::QAB1(B),XP(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • P(a);CHECK::QAB1(B),XP(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);
      • Refutation
        • P(a);CHECK
    • Try
      • Q(B);
      • Refutation
        • P(a);CHECK
    • Try
      • Q(B);
      • Vars
        • P(c);N_GUARD::QAR1(B)
      • Refutation
        • P(a);CHECK
  • Actual
    • K(A);P-FLIGHT
    • Vars
      • K(b);S_FLIGHT::QAB1(B)
      • P(a);::QAB1(B),XP(a)
      • P(c);SBLOCK::QAB(B)
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