MESON Chess Problem Database

Problem Display
PID: 282732 (4N3/8/7b/5p1p/3Q1qkp/4B2p/4P2P/3BK3 w - - 0 1)

Hoffmann, Martin Wolfgang

Zurcher Woche/Sonntags-Journal, 1970

(First published on Sat Nov 14 1970)

4N3/8/7b/5p1p/3Q1qkp/4B2p/4P2P/3BK3

#2

7 + 7

15601 Albrecht-Leiss-Degener Collection 2025

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4
      • 2.Sf6#
    • 1...Bg7
      • 2.Qxf4#
    • 1...Bf8
      • 2.Qxf4#
  • Tries
    • 1.Bc1?
      • 1...Kg5
        • 2.Qg1#
      • 1...Qe4
        • 2.Sf6#
      • 1...Bg5
        • 2.e3#
      • 1...Bg7
        • 2.Qxf4#
      • 1...Bf8
        • 2.Qxf4#
      • 1...Qxd4!
    • 1.Bxf4?
      • threat
        • 2.Sf6#
        • 2.e3#
      • 1...Bg5
        • 2.e3#
      • 1...Bg7
        • 2.e3#
      • 1...Bxf4!
    • 1.Qg7+?
      • 1...Qg5
        • 2.Sf6#
      • 1...Bg5
        • 2.Sf6#
      • 1...Bxg7!
  • Keys
    • 1.Bd2!
      • 1...Kg5
        • 2.Qg1#
      • 1...Qxd4
        • 2.e4#
      • 1...Qe4
        • 2.Sf6#
      • 1...Bg5
        • 2.e3#
      • 1...Bg7
        • 2.Qxf4#
      • 1...Bf8
        • 2.Qxf4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(b);::S(G)
    • B(g);N_GUARD::QAR1(F),XQ(b)
  • Tries
    • Try
      • B(E);
      • Vars
        • K(c);P-FLIGHT::QAR(F)
        • Q(b);P_PINP(C)::S(G)
        • B(g);SBLOCK::B(A)+P(C)
        • B(g);N_GUARD::QAR1(F),XQ(b)
      • Refutation
        • Q(b);N_SPINQ(b),XQ(F)
    • Try
      • B(E);XQ(b)
      • Threat
        • DUALS(2)
      • Vars
        • B(g);::B(A)+P(C)
      • Refutation
        • B(g);P_SPINB(g),XB(E)
    • Try
      • Q(F);CHECK,N_PINQ(b)
      • Vars
        • Q(b);P_SPINQ(b)::S(G)
        • B(g);P_SPINB(g)::S(G)
      • Refutation
        • B(g);XQ(F)
  • Actual
    • B(E);
    • Vars
      • K(c);P-FLIGHT::QAR(F)
      • Q(b);N_GUARD,N_SPINQ(b),XQ(F)::B(A)+P(C)
      • Q(b);P_PINP(C)::S(G)
      • B(g);SBLOCK::B(A)+P(C)
      • B(g);N_GUARD::QAR1(F),XQ(b)
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