MESON Chess Problem Database

Problem Display
PID: 165076 (8/8/8/4K1p1/4P1P1/5B2/4QpR1/3R1bbk w - - 0 1)

Preiswerk, Walther Edouard

Deutsches Wochenschach, 1910

8/8/8/4K1p1/4P1P1/5B2/4QpR1/3R1bbk

#2

7 + 5

16108 Walther Preiswerks Shachprobleme (M. Henneberger) 1949
15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Bh2+
      • 2.Rg3#
  • Tries
    • 1.Rg3+?
      • 1...Bg2
        • 2.Rh3#
      • 1...Kh2!
    • 1.Qxf2?
      • threat
        • 2.Rxg1#
        • 2.Rh2#
        • 2.Qxg1#
      • 1...Bh2+
        • 2.Rxh2#
        • 2.Rg3#
      • 1...Bxg2
        • 2.Qxg1#
        • 2.Qxg2#
      • 1...Bxf2!
  • Keys
    • 1.Qa6!
      • 1...Bh2+
        • 2.Rg3#
      • 1...Bxg2
        • 2.Qh6#
      • 1...Bxa6
        • 2.Rxf2#
      • 1...Be2
        • 2.Qh6#
      • 1...Bd3
        • 2.Rxf2#
        • 2.Qh6#
      • 1...Bc4
        • 2.Rxf2#
        • 2.Qh6#
      • 1...Bb5
        • 2.Rxf2#
        • 2.Qh6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • B(b);CHECK,P_SPINB(a),SBLOCK::B(D)+R(C)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • B(a);P_SPINB(b)::R(C)
      • Refutation
        • K(c);P-FLIGHT,P_SPINP(d)
    • Try
      • Q(B);XP(d)
      • Threat
        • DUALS(3)
      • Refutation
        • B(b);P_SPINB(a),XQ(B)
  • Actual
    • Q(B);
    • Vars
      • B(b);CHECK,P_SPINB(a),SBLOCK::B(D)+R(C)
      • B(a);P_SPINB(b),XR(C)::QAR(B)
      • B(a);N_GUARD,P_SPINB(b),XQ(B)::B(D)+R(C),XP(d)
      • B(a);P_SPINB(b)::QAR(B)
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