MESON Chess Problem Database

Problem Display
PID: 144148 (r4b1Q/4n2P/1R1NN2k/3pP1p1/p7/K7/4B3/8 w - - 0 1)

von Holzhausen, Walther Freiherr

Chemnitzer Tageblatt, 1926

(First published on Sun Aug 15 1926)

r4b1Q/4n2P/1R1NN2k/3pP1p1/p7/K7/4B3/8

#2

8 + 7

14868 Pirnie Collection 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Bg7
      • 2.Qxg7#
    • 1...Sg8
      • 2.hxg8Q#
      • 2.hxg8R#
  • Tries
    • 1.Sxf8?
      • threat
        • 2.Sf5#
        • 2.Sf7#
      • 1...Sf5
        • 2.Sxf5#
        • 2.Sf7#
        • 2.Qf6#
      • 1...g4!
    • 1.Qf6+?
      • 1...Sg6
        • 2.h8Q#
        • 2.h8R#
      • 1...Kxh7!
    • 1.Qxf8+?
      • 1...Kg6
        • 2.Qg7#
      • 1...Kxh7
        • 2.Qg7#
      • 1...Rxf8!
  • Keys
    • 1.Sxg5!
      • threat
        • 2.Sdf7#
      • 1...Kxg5
        • 2.Qf6#
      • 1...Kg6
        • 2.Qf6#
      • 1...Sf5
        • 2.Qf6#
      • 1...Sc6
        • 2.Qf6#
      • 1...Sg6
        • 2.Sf7#
      • 1...Sc8
        • 2.Qf6#
      • 1...Sg8
        • 2.hxg8Q#
        • 2.hxg8R#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • B(g);N_GUARD::QAB1(H),XB(g)
    • S(e);OGATE,P_PINS(E)::PXS(e)=Q
  • Tries
    • Try
      • S(F);XB(g)
      • Threat
        • DUALS(2)
      • Refutation
        • P(c);
    • Try
      • Q(H);CHECK
      • Vars
        • S(e);P_PINS(E),P_SPINS(e)::P=Q
      • Refutation
        • K(d);P-FLIGHT,XP(G)
    • Try
      • Q(H);CHECK,XB(g)
      • Vars
        • K(d);P-FLIGHT::QAR1(H)
        • K(d);P-FLIGHT,XP(G)::QAR1(H)
      • Refutation
        • R(f);XQ(H)
  • Actual
    • S(F);XP(c)
    • Threat
      • R(D)+S(E),DCHECK
    • Vars
      • K(d);S_FLIGHT,XS(F)::QAB1(H)
      • K(d);P-FLIGHT::QAR1(H)
      • S(e);N_GUARD,P_PINS(E)::QAR2(H)
      • S(e);P_PINS(E),SBLOCK::S(F)
      • S(e);OGATE,P_PINS(E)::PXS(e)=Q
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