MESON Chess Problem Database

Problem Display
PID: 21628 (QR6/3p4/1p1K4/Np6/Pk1p4/3B4/8/2B5 w - - 0 1)

Sheppard, Charles William

Good Companions (October), 1920

QR6/3p4/1p1K4/Np6/Pk1p4/3B4/8/2B5

#2

7 + 5

3391 Het Half Pin Thema 1924

SOLUTION

  • SOUND
  • Tries
    • 1.Qc6?
      • 1...Kxa4
        • 2.Qxb5#
      • 1...Kxa5
        • 2.Qxb5#
      • 1...bxa4
        • 2.Qc5#
      • 1...bxa5
        • 2.Qc4#
      • 1...dxc6!
  • Keys
    • 1.Qd5!
      • 1...Kc3
        • 2.Qb3#
      • 1...Kxa4
        • 2.Qxb5#
      • 1...Kxa5
        • 2.Qxb5#
      • 1...bxa4
        • 2.Qc5#
      • 1...bxa5
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(F);
      • Vars
        • K(a);P-FLIGHT,P_SPINP(c),XP(C)::QAB1(F),XP(c)
        • K(a);S_FLIGHT,XS(D)::QAR1(F),XP(c)
        • P(c);P_SPINP(d),SBLOCK,XP(C)::QAB1(F)
        • P(d);P_SPINP(c),SBLOCK,XS(D)::QAR1(F)
      • Refutation
        • P(e);XQ(F)
  • Actual
    • Q(F);
    • Vars
      • K(a);S_FLIGHT::QAR1(F)
      • K(a);P-FLIGHT,XP(C)::QAB1(F),XP(c)
      • K(a);P_SPINP(c),S_FLIGHT,XS(D)::QAR1(F),XP(c)
      • P(c);P_SPINP(d),SBLOCK,XP(C)::QAB1(F)
      • P(d);P_SPINP(c),SBLOCK,XS(D)::QAR1(F)
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