MESON Chess Problem Database

Problem Display
PID: 58640 (1n6/p3B3/r4r2/p1PPk1q1/2KN2Pn/2p1Pp2/2BP3N/4Q3 w - - 0 1)

Perquin, Walter Frans

Het Handelblad, 1933

1n6/p3B3/r4r2/p1PPk1q1/2KN2Pn/2p1Pp2/2BP3N/4Q3

#2

11 + 10

785 Het Belgisch Schaakbord (L'Echiquier Belge) 1955

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe3
      • 2.Qxe3#
    • 1...Qxg4
      • 2.Sxg4#
    • 1...Sf5
      • 2.Shxf3#
      • 2.Sdxf3#
  • Tries
    • 1.Sdxf3+?
      • 1...Rxf3
        • 2.d4#
      • 1...Sxf3!
    • 1.Sc6+?
      • 1...Raxc6
        • 2.d4#
      • 1...Rfxc6
        • 2.d4#
      • 1...Sxc6!
  • Keys
    • 1.Se6!
      • threat
        • 2.d4#
      • 1...Qf4+
        • 2.exf4#
      • 1...Qxg4+
        • 2.Sxg4#
      • 1...Rf4+
        • 2.exf4#
      • 1...cxd2
        • 2.Qa1#
      • 1...Sf5
        • 2.Sxf3#
      • 1...Sc6
        • 2.Bd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • Q(f);OGATE,P_SPINQ(f),XP(E)::QAR2(A),XQ(f)
    • Q(f);P_PINS(G),XP(H)::S(D),XQ(f)
  • Tries
    • Try
      • S(G);CHECK,XP(b)
      • Vars
        • R(h);XS(G)::P(C)
      • Refutation
        • S(c);XS(G)
    • Try
      • S(G);CHECK
      • Vars
        • R(g);P_PINP(I),XS(G)::P(C)
        • R(h);P_PINP(I),XS(G)::P(C)
      • Refutation
        • S(j);XS(G)
  • Actual
    • S(G);
    • Threat
      • P(C)
    • Vars
      • Q(f);CHECK,OGATE::QAR(A)+P(E)DCHECK,XQ(f)
      • Q(f);CHECK,XP(H)::S(D),XQ(f)
      • R(h);CHECK,OGATE::QAR(A)+P(E)DCHECK,XR(h)
      • P(a);OGATEB,XP(C)::QAB(A)
      • S(c);N_GUARD,S_CUTR(h)::S(D),XP(b)
      • S(j);S_CUTR(g)::B(K)
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