MESON Chess Problem Database

Problem Display
PID: 181962 (2B5/Q7/3p1pqb/3N1np1/3pk1p1/1K1N2P1/3PP3/8 w - - 0 1)

Preiswerk, Walther Edouard

Cologne Ty., 1921

2B5/Q7/3p1pqb/3N1np1/3pk1p1/1K1N2P1/3PP3/8

#2

8 + 9

16108 Walther Preiswerks Shachprobleme (M. Henneberger) 1949

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd5
      • 2.Qb7#
      • 2.Qa8#
    • 1...Qh5
      • 2.Sxf6#
    • 1...Qh7
      • 2.Sxf6#
    • 1...Qe8
      • 2.Sxf6#
  • Tries
    • 1.Qd7?
      • threat
        • 2.Qe6#
      • 1...Kxd5
        • 2.Bb7#
        • 2.Qb7#
      • 1...Qf7
        • 2.Qxf5#
      • 1...Qe8
        • 2.Sxf6#
        • 2.Qxf5#
      • 1...Qg8
        • 2.Qxf5#
      • 1...Sg7!
    • 1.Qe7+?
      • 1...Kxd5
        • 2.Bb7#
        • 2.Qb7#
      • 1...Sxe7!
  • Keys
    • 1.Qh7!
      • 1...Kxd5
        • 2.Qb7#
      • 1...Qxh7
        • 2.Sxf6#
      • 1...Sxg3
        • 2.Sxf6#
      • 1...Qf7
        • 2.Qxf5#
      • 1...Qh5
        • 2.Sxf6#
        • 2.Qxf5#
      • 1...Qe8
        • 2.Sxf6#
        • 2.Qxf5#
      • 1...Qg7
        • 2.Qxf5#
      • 1...Qg8
        • 2.Qxf5#
      • 1...Bg7
        • 2.Qh1#
      • 1...Bf8
        • 2.Qh1#
      • 1...Se3
        • 2.Sxf6#
      • 1...Sh4
        • 2.Sxf6#
      • 1...Se7
        • 2.Sxf6#
      • 1...Sg7
        • 2.Sxf6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 2
  • Sets
    • Q(h);N_GUARD::S(F),XP(g)
  • Tries
    • Try
      • Q(G);
      • Threat
        • QAR2(G)
      • Vars
        • Q(h);N_GUARD,P_PINS(F)::QAB1(G),XS(d)
      • Refutation
        • S(d);
    • Try
      • Q(G);CHECK
      • Refutation
        • S(d);XQ(G)
  • Actual
    • Q(G);
    • Vars
      • K(b);OGATEB,S_FLIGHT,XS(F)::QAB(G)
      • Q(h);N_GUARD,XQ(G)::S(F),XP(g)
      • S(d);P_SPINQ(h),XP(E)::S(F),XP(g)
      • Q(h);OGATE,P_PINS(F),P_SPINS(d)::QAB1(G),XS(d)
      • Q(h);OGATE,P_SPINS(d)::QAB1(G),XS(d)
      • B(i);OGATE::QAB(G)
      • S(d);P_SPINQ(h)::S(F),XP(g)
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