MESON Chess Problem Database

Problem Display
PID: 49503 (6B1/1n1Q1p2/5P2/5Np1/1K2krr1/1ppNPR2/2qp2P1/4R3 w - - 0 1)

Servais, Albert

2nd Prize, Bulletin de l'UPF, 1946-1947

6B1/1n1Q1p2/5P2/5Np1/1K2krr1/1ppNPR2/2qp2P1/4R3

#2

10 + 10

785 Het Belgisch Schaakbord (L'Echiquier Belge) 1948

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf5
      • 2.Qxf5#
      • 2.Qd4#
    • 1...Rg3
      • 2.Sxg3#
    • 1...Rh4
      • 2.Sg3#
  • Tries
    • 1.Bxf7?
      • threat
        • 2.Qd5#
      • 1...Qxd3
        • 2.Qe6#
      • 1...Rxf5
        • 2.Qxf5#
        • 2.Qd4#
      • 1...Sd6!
    • 1.Rxf4+?
      • 1...Rxf4
        • 2.Sg3#
      • 1...gxf4!
    • 1.Qc6+?
      • 1...Kxd3+
        • 2.exf4#
      • 1...Kxf5+!
    • 1.Qe6+?
      • 1...Kxd3+
        • 2.exf4#
      • 1...fxe6!
    • 1.Qxb7+?
      • 1...Kxd3+
        • 2.exf4#
      • 1...Kxf5+!
  • Keys
    • 1.Qxf7!
      • threat
        • 2.Qd5#
      • 1...Kxd3+
        • 2.exf4#
      • 1...Kxf5+
        • 2.e4#
      • 1...Qxd3
        • 2.Qe6#
      • 1...Rxf5
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • R(g);N_GUARD::S(G),XR(g)
    • R(g);N_GUARD::S(G)
  • Tries
    • Try
      • B(J);XP(j)
      • Threat
        • QAB1(I)
      • Vars
        • Q(a);SBLOCK,XS(C)::QAR2(I)
      • Refutation
        • S(i);
    • Try
      • R(E);CHECK,XR(f)
      • Vars
        • R(g);XR(E)::S(G)
      • Refutation
        • P(h);XR(E)
    • Try
      • Q(I);CHECK
      • Vars
        • K(e);CHECK,S_FLIGHT,XS(C)::R(E)+P(D),XR(f)
      • Refutation
        • K(e);CHECK,P_SPINR(f),S_FLIGHT,XS(G)
    • Try
      • Q(I);CHECK
      • Vars
        • K(e);CHECK,S_FLIGHT,XS(C)::R(E)+P(D),XR(f)
      • Refutation
        • P(j);XQ(I)
    • Try
      • Q(I);CHECK,XS(i)
      • Vars
        • K(e);CHECK,S_FLIGHT,XS(C)::R(E)+P(D),XR(f)
      • Refutation
        • K(e);CHECK,P_SPINR(f),S_FLIGHT,XS(G)
  • Actual
    • Q(I);XP(j)
    • Threat
      • QAB1(I)
    • Vars
      • K(e);CHECK,S_FLIGHT,XS(C)::R(E)+P(D),XR(f)
      • K(e);CHECK,OGATE,P_SPINR(f),S_FLIGHT,XS(G)::P(D)
      • Q(a);SBLOCK,XS(C)::QAR2(I)
      • R(f);XS(G)::QAR2(I)
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