MESON Chess Problem Database

Problem Display
PID: 53699 (7K/8/Q2BPp2/p2k1B1R/r7/2bnPP1N/2P2n2/5b2 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Die Schwalbe, 1950

7K/8/Q2BPp2/p2k1B1R/r7/2bnPP1N/2P2n2/5b2

#2

10 + 8

45 Schach 1950
15148 Sadier Collection 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Bb4
      • 2.c4#
    • 1...Sb4
      • 2.Sf4#
  • Tries
    • 1.Qb5+?
      • 1...Sc5
        • 2.Qxc5#
      • 1...Kxd6!
    • 1.Qb7+?
      • 1...Kc4
        • 2.Qb3#
      • 1...Kxd6!
  • Keys
    • 1.Bb4!
      • threat
        • 2.Be4#
      • 1...Ke5
        • 2.Qd6#
      • 1...Be5
        • 2.c4#
      • 1...Se4
        • 2.Bxe4#
      • 1...Se5
        • 2.Sf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • B(c);OGATE::P(A)
    • S(d);N_GUARD,S_CUTR(e)::S(D)
  • Tries
    • Try
      • Q(G);CHECK
      • Vars
        • S(d);N_GUARD,P_SPINS(d)::QAR1(G),XS(d)
      • Refutation
        • K(g);P-FLIGHT,XB(H)
    • Try
      • Q(G);CHECK
      • Vars
        • K(g);S_FLIGHT::QAB1(G)
      • Refutation
        • K(g);P-FLIGHT,XB(H)
  • Actual
    • B(H);
    • Threat
      • R(F)+B(E),DCHECK
    • Vars
      • K(g);P-FLIGHT::QAB1(G)
      • B(c);OGATE,SBLOCK::P(A)
      • S(b);::R(F)+B(E),DCHECK,XS(b)
      • S(d);N_GUARD,SBLOCK::S(D)
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