MESON Chess Problem Database

Problem Display
PID: 258788 (8/2p1Q3/P1k1nrpK/BpPr1pp1/8/2NP3n/qP6/1b5B w - - 0 1)

Popp, Willy

Die Schwalbe, 1967

8/2p1Q3/P1k1nrpK/BpPr1pp1/8/2NP3n/qP6/1b5B

#2

9 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qa1
      • 2.Bxd5#
    • 1...Qxb2
      • 2.Bxd5#
    • 1...Qa3
      • 2.Bxd5#
    • 1...Qa4
      • 2.Bxd5#
    • 1...Qxa5
      • 2.Bxd5#
    • 1...Sd4
      • 2.Qxc7#
    • 1...Sf4
      • 2.Qxc7#
    • 1...Sxc5
      • 2.Qxc7#
    • 1...Sg7
      • 2.Qxc7#
    • 1...Sd8
      • 2.Qxc7#
    • 1...Sf8
      • 2.Qxc7#
  • Tries
    • 1.b4?
      • threat
        • 2.Qe8#
      • 1...Sxc5
        • 2.Qxc7#
      • 1...Rf7
        • 2.Qxe6#
      • 1...Rf8
        • 2.Qxe6#
      • 1...Sg7
        • 2.Qxc7#
      • 1...Sf8
        • 2.Qxc7#
      • 1...Qg2!
    • 1.d4?
      • threat
        • 2.Qe8#
      • 1...Sxd4
        • 2.Qxc7#
      • 1...Sxc5
        • 2.Qxc7#
      • 1...Rf7
        • 2.Qxe6#
      • 1...Rf8
        • 2.Qxe6#
      • 1...Sg7
        • 2.Qxc7#
      • 1...Sf8
        • 2.Qxc7#
      • 1...Be4!
  • Keys
    • 1.Bb6!
      • threat
        • 2.Qe8#
      • 1...Qxa6
        • 2.Bxd5#
      • 1...Sxc5
        • 2.Qxc7#
      • 1...cxb6
        • 2.Qd6#
      • 1...Rf7
        • 2.Qxe6#
      • 1...Rf8
        • 2.Qxe6#
      • 1...Sg7
        • 2.Qxc7#
      • 1...Sf8
        • 2.Qxc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 8
  • Sets
    • Q(b);N_GUARD::B(A),XR(e)
    • Q(b);N_GUARD,XP(B)::B(A),XR(e)
    • Q(b);N_GUARD,XB(E)::B(A),XR(e)
    • S(i);N_GUARD::QAR1(I),XP(l)
    • S(i);N_GUARD,SBLOCK,XP(F)::QAR1(I),XP(l)
  • Tries
    • Try
      • P(B);
      • Threat
        • QAB(I)
      • Vars
        • S(i);N_GUARD,XP(F)::QAR1(I),XP(l)
        • R(j);N_GUARD::QAR2(I),XS(i)
        • S(i);N_GUARD::QAR1(I),XP(l)
      • Refutation
        • Q(b);N_SPINR(e)
    • Try
      • P(D);
      • Threat
        • QAB(I)
      • Vars
        • S(i);N_GUARD,XP(D)::QAR1(I),XP(l)
        • S(i);N_GUARD,XP(F)::QAR1(I),XP(l)
        • R(j);N_GUARD::QAR2(I),XS(i)
        • S(i);N_GUARD::QAR1(I),XP(l)
      • Refutation
        • B(a);N_SPINR(e)
  • Actual
    • B(E);
    • Threat
      • QAB(I)
    • Vars
      • Q(b);N_GUARD,XP(G)::B(A),XR(e)
      • S(i);N_GUARD,XP(F)::QAR1(I),XP(l)
      • P(l);N_GUARD,XB(E)::QAR1(I)
      • R(j);N_GUARD::QAR2(I),XS(i)
      • S(i);N_GUARD::QAR1(I),XP(l)
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