MESON Chess Problem Database

Problem Display
PID: 29782 (4B3/Kp3N2/1B2k3/p6p/2n1P2Q/qNb1p3/8/8 w - - 0 1)

Shire, David J

The Problemist, 1986

4B3/Kp3N2/1B2k3/p6p/2n1P2Q/qNb1p3/8/8

#2

7 + 8

3256 David Shire Selected Chess Problems 2001

SOLUTION

  • SOUND
  • Sets
    • 1...Qc1
      • 2.Sc5#
    • 1...Qb2
      • 2.Sc5#
    • 1...Qc5
      • 2.Sxc5#
    • 1...Qa1
      • 2.Sc5#
    • 1...Qa2
      • 2.Sc5#
    • 1...Qa4
      • 2.Sc5#
    • 1...Be1
      • 2.Sd4#
    • 1...Bd2
      • 2.Sd4#
    • 1...Bb4
      • 2.Sd4#
    • 1...Bd4
      • 2.Sxd4#
  • Tries
    • 1.Bd4?
      • threat
        • 2.Qf6#
      • 1...Qc5+
        • 2.Sxc5#
      • 1...Bxd4+
        • 2.Sxd4#
      • 1...Qe7
        • 2.Qh3#
      • 1...Se5!
    • 1.Bc5?
      • threat
        • 2.Qe7#
      • 1...Qxc5+
        • 2.Sxc5#
      • 1...Bf6
        • 2.Qh3#
      • 1...Sd6!
  • Keys
    • 1.Bd8!
      • threat
        • 2.Qh3#
      • 1...Qc5+
        • 2.Sxc5#
      • 1...Bd4+
        • 2.Sxd4#
      • 1...Qe7
        • 2.Qxe7#
      • 1...Se5
        • 2.Qf6#
      • 1...Sd6
        • 2.Qe7#

This is after

After M Mladenovic.

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • Q(a);N_GUARD::S(A)
    • Q(a);N_GUARD,P_PINB(D)::S(A),XQ(a)
    • B(b);N_GUARD::S(A)
    • B(b);N_GUARD,P_PINB(D)::S(A),XB(b)
  • Tries
    • Try
      • B(D);
      • Threat
        • QAR1(C)
      • Vars
        • Q(a);CHECK,N_GUARD::S(A),XQ(a)
        • B(b);CHECK,XB(D)::S(A),XB(b)
        • Q(a);SBLOCK::QAB(C)
      • Refutation
        • S(d);
    • Try
      • B(D);
      • Threat
        • QAR1(C)
      • Vars
        • Q(a);CHECK,XB(D)::S(A),XQ(a)
        • B(b);SBLOCK::QAB(C)
      • Refutation
        • S(d);
  • Actual
    • B(D);
    • Threat
      • QAB(C)
    • Vars
      • Q(a);CHECK,N_GUARD::S(A),XQ(a)
      • B(b);CHECK,N_GUARD::S(A),XB(b)
      • Q(a);N_GUARD::QAR1(C),XQ(a)
      • S(d);S_CUTB(b)::QAR1(C)
      • S(d);S_CUTQ(a)::QAR1(C)
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