MESON Chess Problem Database

Problem Display
PID: 21613 (Q4K1k/3p3p/8/8/4R3/8/b7/8 w - - 0 1)

von Holzhausen, Walther Freiherr

Deutsches Wochenschach, 1920

Q4K1k/3p3p/8/8/4R3/8/b7/8

#2

3 + 4

3295 Einfuhrung in die Welt des Schachproblem 1984

SOLUTION

  • SOUND
  • Sets
    • 1...Bb1
      • 2.Kf7#
      • 2.Qa1#
    • 1...Bb3
      • 2.Qa1#
    • 1...Bc4
      • 2.Qa1#
    • 1...Bd5
      • 2.Qa1#
    • 1...Be6
      • 2.Qa1#
    • 1...Bf7
      • 2.Kxf7#
      • 2.Qa1#
    • 1...Bg8
      • 2.Qa1#
    • 1...d5
      • 2.Kf7#
  • Tries
    • 1.Ke7+?
      • 1...Bg8
        • 2.Qa1#
      • 1...Kg7!
    • 1.Rh4?
      • 1...h5
        • 2.Rxh5#
      • 1...h6
        • 2.Rxh6#
      • 1...Bb1
        • 2.Kf7#
        • 2.Qa1#
      • 1...Bb3
        • 2.Qa1#
      • 1...Bc4
        • 2.Qa1#
      • 1...Bd5
        • 2.Qa1#
      • 1...Be6
        • 2.Qa1#
      • 1...Bf7
        • 2.Kxf7#
        • 2.Qa1#
      • 1...Bg8
        • 2.Qa1#
      • 1...d5
        • 2.Kf7#
      • 1...d6!
    • 1.Qc6?
      • threat
        • 2.Qc3#
        • 2.Qf6#
      • 1...h5
        • 2.Qh6#
      • 1...h6
        • 2.Qxh6#
      • 1...d6
        • 2.Qc3#
      • 1...Bc4
        • 2.Qf6#
      • 1...Be6
        • 2.Qc3#
      • 1...d5
        • 2.Qf6#
      • 1...dxc6!
    • 1.Qxa2?
      • threat
        • 2.Qg8#
        • 2.Qa1#
        • 2.Qb2#
      • 1...h5
        • 2.Qg8#
      • 1...h6
        • 2.Qg8#
      • 1...d5!
    • 1.Qa6?
      • threat
        • 2.Qf6#
      • 1...h5
        • 2.Qh6#
      • 1...h6
        • 2.Qxh6#
      • 1...Be6
        • 2.Qa1#
      • 1...d6!
  • Keys
    • 1.Re6!
      • threat
        • 2.Kf7#
      • 1...Bxe6
        • 2.Qa1#
      • 1...h5
        • 2.Rh6#
      • 1...h6
        • 2.Rxh6#
      • 1...Bd5
        • 2.Qa1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • B(a);OGATE::QAB(B)
    • P(b);::QAR(B)+K(C)
  • Tries
    • Try
      • K(C);CHECK,S_FLIGHT
      • Vars
        • B(a);OGATE,P_SPINB(a),SBLOCK::QAB(B)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • R(A);P_PINP(c)
      • Vars
        • P(c);OGATEB::R(A),XP(c)
        • B(a);OGATE::QAB(B)
        • P(b);::QAR(B)+K(C)
      • Refutation
        • P(b);
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);OGATEB::QAR2(B)
        • P(c);OGATEB::QAR2(B),XP(c)
        • P(b);::QAB(B)
        • B(a);::QAB(B)
      • Refutation
        • P(b);XQ(B)
    • Try
      • Q(B);XB(a)
      • Threat
        • DUALS(3)
      • Vars
        • P(c);::QAR1(B)
      • Refutation
        • P(b);
    • Try
      • Q(B);
      • Threat
        • QAB(B)
      • Vars
        • P(c);OGATEB::QAR2(B)
        • P(c);OGATEB::QAR2(B),XP(c)
        • B(a);OGATE::QAB(B)
      • Refutation
        • P(b);
  • Actual
    • R(A);
    • Threat
      • QAR(B)+K(C)
    • Vars
      • B(a);OGATE,XR(A)::QAB(B)
      • P(c);OGATEB::R(A)
      • P(c);OGATEB::R(A),XP(c)
      • B(a);OGATE::QAB(B)
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