MESON Chess Problem Database

Problem Display
PID: 163270 (6b1/q3p3/4r2p/8/pB2N1QK/N2kP2R/8/6b1 w - - 0 1)

Shire, David J

British Chess Magazine, 2017

6b1/q3p3/4r2p/8/pB2N1QK/N2kP2R/8/6b1

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe3
      • 2.Sc5#
    • 1...Qc5
      • 2.Sxc5#
    • 1...Qb8
      • 2.Sc5#
    • 1...Qa6
      • 2.Sc5#
    • 1...Qb7
      • 2.Sc5#
    • 1...Qd7
      • 2.Sc5#
    • 1...Qa8
      • 2.Sc5#
    • 1...Rb6
      • 2.Sc5#
    • 1...Bf2+
      • 2.Sxf2#
    • 1...Bh2
      • 2.Sf2#
    • 1...Bxe3
      • 2.Sf2#
  • Keys
    • 1.Sg3!
      • threat
        • 2.Qe2#
      • 1...Kxe3
        • 2.Sh1#
      • 1...Qxe3
        • 2.Qc4#
      • 1...Rxe3
        • 2.Qd1#
      • 1...Bxe3
        • 2.Qc4#
      • 1...Qd4
        • 2.Qxd4#
      • 1...Re4
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 9
  • Sets
    • Q(f);N_GUARD,P_SPINQ(f),XP(B)::S(E)
    • Q(f);N_GUARD::S(E),XQ(f)
    • Q(f);N_GUARD::S(E)
    • R(d);S_CUTQ(f)::S(E)
    • B(a);CHECK,N_GUARD::S(E),XB(a)
    • B(a);N_GUARD::S(E)
    • B(a);N_GUARD,P_SPINB(a),XP(B)::S(E)
  • Actual
    • S(E);
    • Threat
      • QAB1(F)
    • Vars
      • K(b);P-FLIGHT,XP(B)::R(C)+S(E)
      • Q(f);SBLOCK,XP(B)::QAB1(F)
      • R(d);SBLOCK,XP(B)::QAR2(F)
      • B(a);SBLOCK,XP(B)::QAB1(F)
      • Q(f);N_GUARD,P_PINQ(F)::QAR1(F),XQ(f)
      • R(d);N_GUARD,P_PINQ(F)::QAB1(F),XR(d)
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