MESON Chess Problem Database

Problem Display
PID: 227095 (8/8/4p2K/5Ppp/4q2P/2nQNk1p/5PN1/4B2B w - - 0 1)

Vaughan, Colin V

US Problem Bulletin, 1985

8/8/4p2K/5Ppp/4q2P/2nQNk1p/5PN1/4B2B

#2

9 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qg4
      • 2.Sd1#
      • 2.Sf1#
      • 2.Sc2#
      • 2.Sc4#
      • 2.Sd5#
    • 1...Sb1
      • 2.Qd1#
    • 1...Sd1
      • 2.Qxd1#
    • 1...Sa2
      • 2.Qd1#
    • 1...Sa4
      • 2.Qd1#
    • 1...Sb5
      • 2.Qd1#
    • 1...Sd5
      • 2.Qd1#
  • Keys
    • 1.Kxg5!
      • threat
        • 2.Sf4#
      • 1...Qxf5+
        • 2.Sxf5#
      • 1...Qf4+
        • 2.Sxf4#
      • 1...Qg4+
        • 2.Sxg4#
      • 1...Qxh4+
        • 2.Sxh4#
      • 1...hxg2
        • 2.Bxg2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 6
  • Sets
    • S(a);N_GUARD::QAB(E)
    • S(a);N_GUARD::QAB(E),XS(a)
  • Actual
    • K(I);S_FLIGHT,XP(e)
    • Threat
      • B(B)+S(D)
    • Vars
      • Q(d);CHECK,XP(H)::QAR(E)+S(F),XQ(d)
      • Q(d);CHECK::B(B)+S(D),XQ(d)
      • Q(d);CHECK,N_GUARD::QAR(E)+S(F),XQ(d)
      • Q(d);CHECK,XP(G)::B(B)+S(D),DCHECK,XQ(d)
      • P(c);OGATE,P_SPINP(c),XS(D)::B(B),XP(c)
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