MESON Chess Problem Database

Problem Display
PID: 51616 (3b4/1Qq5/1n1N4/3pP3/p2B4/P2kPP1p/3p3K/3B4 w - - 0 1)

Barrow, John Hugh

Manchester City News, 1916

3b4/1Qq5/1n1N4/3pP3/p2B4/P2kPP1p/3p3K/3B4

#2

9 + 8

5257 Chess Problems by J H Barrow 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Qb8
      • 2.Qh7#
    • 1...Qc1
      • 2.Qh7#
    • 1...Qc2
      • 2.Qh7#
    • 1...Qc3
      • 2.Qh7#
    • 1...Qc4
      • 2.Qh7#
    • 1...Qc5
      • 2.Qh7#
    • 1...Qc6
      • 2.Qh7#
    • 1...Qh7
      • 2.Qxh7#
    • 1...Sc4
      • 2.Qb1#
  • Tries
    • 1.Qxc7?
      • threat
        • 2.Qc2#
        • 2.Qc3#
        • 2.Qh7#
      • 1...Be7
        • 2.Qc2#
        • 2.Qc3#
      • 1...Sc4
        • 2.Qh7#
      • 1...Sd7
        • 2.Qc2#
        • 2.Qc3#
      • 1...Bxc7!
  • Keys
    • 1.Sc4!
      • threat
        • 2.Sb2#
      • 1...Qxe5+
        • 2.Sxe5#
      • 1...Kxc4
        • 2.Qa6#
      • 1...Qxc4
        • 2.Qh7#
      • 1...Sxc4
        • 2.Qb1#
      • 1...dxc4
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • Q(g);OGATE::QAB(I)
    • Q(g);OGATE::QAB(I),XQ(g)
    • S(f);OGATE::QAB(I)
  • Tries
    • Try
      • Q(I);XQ(g)
      • Threat
        • DUALS(3)
      • Vars
        • S(f);::QAB(I)
      • Refutation
        • B(h);XQ(I)
  • Actual
    • S(H);P_SPINP(G)
    • Threat
      • S(H)
    • Vars
      • Q(g);CHECK,XP(G)::S(H),XQ(g)
      • K(b);OGATEB,S_FLIGHT,XS(H)::QAB(I)
      • Q(g);N_PINP(G),OGATE,SBLOCK,XS(H)::QAB(I)
      • S(f);OGATE,SBLOCK,XS(H)::QAB(I)
      • P(e);OGATE,SBLOCK,XS(H)::QAB1(I)
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