MESON Chess Problem Database

Problem Display
PID: 144901 (8/8/BR1P4/PPpK4/kqNR4/PNp5/1PP5/8 w - c5 0 1)

Prins, Hendrik

Comm., Schakend Nederland, 1981

8/8/BR1P4/PPpK4/kqNR4/PNp5/1PP5/8

#2

12 + 4

145 StrateGems 1999

SOLUTION

  • SOUND
  • Sets
    • 1...Qxa5
      • 2.Sxc5#
    • 1...Qxc4+
      • 2.Rxc4#
    • 1...Qxb5
      • 2.Bxb5#
  • Keys
    • 1.bxc5 ep!
      • threat
        • 2.Rxb4#
      • 1...Qxa5+
        • 2.Scxa5#
      • 1...Qc5+
        • 2.Sxc5#
      • 1...Qxd6+
        • 2.Sxd6#
      • 1...Qxc4+
        • 2.Rxc4#
      • 1...Qb5+
        • 2.Bxb5#
      • 1...Qxa3
        • 2.Sxa3#
      • 1...Qxb3
        • 2.cxb3#
      • 1...Qxb6
        • 2.Sxb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • Q(c);N_GUARD,XP(G)::S(D),XP(d)
    • Q(c);CHECK,OGATE,P_SPINQ(c),XS(E)::R(F),XQ(c)
    • Q(c);OGATE,XP(H)::B(J),XQ(c)
  • Actual
    • P(H);EP,XP(d)
    • Threat
      • R1(K),XQ(c)
    • Vars
      • Q(c);CHECK,XP(G)::R(F)+S(E),XQ(c)
      • Q(c);CHECK,N_GUARD::S(D),XQ(c)
      • Q(c);CHECK,XP(L)::R(F)+S(E),XQ(c)
      • Q(c);CHECK,OGATE,P_SPINQ(c),XS(E)::R(F),XQ(c)
      • Q(c);CHECK,N_GUARD::B(J),XQ(c)
      • Q(c);XP(C)::R(F)+S(E),XQ(c)
      • Q(c);OGATE,P_PINS(E),XS(D)::P(B),XQ(c)
      • Q(c);XR(K)::R(F)+S(E),DCHECK,XQ(c)
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Developed and maintained by Brian Stephenson.
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