MESON Chess Problem Database

Problem Display
PID: 229640 (8/2p2q2/4p3/3p2B1/Q2bk1P1/n1p1NN2/2n1P1B1/2K5 w - - 0 1)

Hanson, JH

Sunday Chronicle, 1947

(First published on Sun Dec 28 1947)

8/2p2q2/4p3/3p2B1/Q2bk1P1/n1p1NN2/2n1P1B1/2K5

#2

8 + 9

15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sa1
      • 2.Qxd4#
    • 1...Se1
      • 2.Qxd4#
    • 1...Sxe3
      • 2.Qxd4#
    • 1...Sb1
      • 2.Qxc2#
    • 1...Sc4
      • 2.Qxc2#
    • 1...Sb5
      • 2.Qxc2#
    • 1...e5
      • 2.Sd2#
  • Keys
    • 1.Sc4!
      • threat
        • 2.Sfd2#
      • 1...Be3+
        • 2.Scd2#
      • 1...Qxf3
        • 2.Bxf3#
      • 1...Sxc4
        • 2.Qxc2#
      • 1...dxc4
        • 2.Qc6#
      • 1...Bg1
        • 2.Scd2#
        • 2.Sd6#
      • 1...Bf2
        • 2.Scd2#
        • 2.Sd6#
      • 1...Bc5
        • 2.Scd2#
        • 2.Sd6#
      • 1...Be5
        • 2.Scd2#
        • 2.Sd6#
      • 1...Bb6
        • 2.Scd2#
        • 2.Sd6#
      • 1...Bf6
        • 2.Scd2#
        • 2.Sd6#
      • 1...Ba7
        • 2.Scd2#
        • 2.Sd6#
      • 1...Bg7
        • 2.Scd2#
        • 2.Sd6#
      • 1...Bh8
        • 2.Scd2#
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • S(a);N_GUARD::QAR1(F),XB(d)
    • S(a);N_GUARD,XS(D)::QAR1(F),XB(d)
    • S(b);N_GUARD::QAB(F),XS(a)
    • S(b);N_GUARD,N_SPINB(d)::QAB(F),XS(a)
    • P(g);SBLOCK::B(C)+S(E),DCHECK
  • Actual
    • S(D);N_PINB(d)
    • Threat
      • B(C)+S(E),DCHECK
    • Vars
      • B(d);CHECK::QAR(F)+S(D),DCHECK
      • Q(i);OGATE,P_SPINQ(i),XS(E)::B(C),XQ(i)
      • S(b);N_GUARD,XS(D)::QAB(F),XS(a)
      • P(f);OGATEB,XS(D)::QAB(F)
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