MESON Chess Problem Database

Problem Display
PID: 69024 (2R1b3/2pn4/5P2/2R1qQNp/1P1k4/5KN1/1n2BP2/6B1 w - - 0 1)

Servais, Albert

Volksgazet, 1956

2R1b3/2pn4/5P2/2R1qQNp/1P1k4/5KN1/1n2BP2/6B1

#2

11 + 7

785 Het Belgisch Schaakbord (L'Echiquier Belge) 1957

SOLUTION

  • SOUND
  • Sets
    • 1...Qxg3+
      • 2.fxg3#
    • 1...Qf4+
      • 2.Qxf4#
    • 1...Qd6
      • 2.Qe4#
    • 1...Qxe2+
      • 2.Sxe2#
    • 1...Qe3+
      • 2.fxe3#
    • 1...Qe4+
      • 2.Qxe4#
    • 1...Qd5+
      • 2.Qxd5#
    • 1...Qxf5+
      • 2.Sxf5#
    • 1...Qe6
      • 2.Sxe6#
    • 1...Qe7
      • 2.Qd5#
    • 1...Sd1
      • 2.Qd3#
    • 1...Sd3
      • 2.Qxd3#
    • 1...Sa4
      • 2.Qd3#
    • 1...Sc4
      • 2.Qd3#
    • 1...Sb6
      • 2.Qxe5#
    • 1...Sxf6
      • 2.Qxe5#
    • 1...Sb8
      • 2.Qxe5#
    • 1...Sf8
      • 2.Qxe5#
  • Tries
    • 1.Rc4+?
      • 1...Sxc4
        • 2.Qd3#
      • 1...Kd5!
    • 1.Qg4+?
      • 1...Qf4+
        • 2.Qxf4#
      • 1...Qe4+
        • 2.Qxe4#
      • 1...hxg4+!
    • 1.Qxd7+?
      • 1...Qd6
        • 2.Sf5#
        • 2.Se6#
      • 1...Qd5+
        • 2.Qxd5#
      • 1...Bxd7!
    • 1.Qf4+?
      • 1...Qe4+
        • 2.Qxe4#
      • 1...Qxf4+!
  • Keys
    • 1.Rd8!
      • threat
        • 2.Qxe5#
      • 1...Qxg3+
        • 2.fxg3#
      • 1...Qf4+
        • 2.Qxf4#
      • 1...Qxe2+
        • 2.Sxe2#
      • 1...Qe3+
        • 2.fxe3#
      • 1...Qe4+
        • 2.Qxe4#
      • 1...Qd5+
        • 2.Qxd5#
      • 1...Qxf5+
        • 2.Sxf5#
      • 1...Qxf6
        • 2.Qxf6#
      • 1...Qxc5
        • 2.Qxc5#
      • 1...Sc4
        • 2.Qd3#
      • 1...Qd6
        • 2.Qe4#
      • 1...Qe6
        • 2.Sxe6#
      • 1...Qe7
        • 2.Qd5#
      • 1...Sd3
        • 2.Qxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • Q(c);CHECK,OGATE,XS(E)::B(A)+P(C),XQ(c)
    • Q(c);CHECK,N_GUARD::QAR2(H),XQ(c)
    • Q(c);N_GUARD::QAR1(H)
    • Q(c);CHECK,XB(B)::S(E),XQ(c)
    • Q(c);CHECK,OGATE::P(C),XQ(c)
    • Q(c);CHECK,N_GUARD::QAR1(H),XQ(c)
    • Q(c);CHECK,OGATE::QAR1(H),XQ(c)
    • Q(c);CHECK,XQ(H)::S(E),XQ(c)
    • Q(c);N_GUARD::S(I),XQ(c)
    • Q(c);OGATE::QAR1(H)
    • S(a);N_GUARD::QAR1(H)
    • S(a);N_GUARD::QAR1(H),XS(a)
    • S(f);N_GUARD::QAB1(H),XQ(c)
    • S(f);N_GUARD,XP(J)::QAB1(H),XQ(c)
  • Tries
    • Try
      • R(G);CHECK
      • Vars
        • S(a);XR(G)::QAR1(H)
      • Refutation
        • K(b);P-FLIGHT,P_SPINQ(c)
    • Try
      • Q(H);CHECK
      • Vars
        • Q(c);CHECK,N_GUARD,P_SPINQ(c)::QAR2(H),XQ(c)
        • Q(c);CHECK,N_GUARD,P_SPINQ(c)::QAR1(H),XQ(c)
      • Refutation
        • P(d);CHECK,XQ(H)
    • Try
      • Q(H);CHECK,XS(f)
      • Vars
        • Q(c);CHECK,N_GUARD,P_SPINQ(c)::QAR1(H),XQ(c)
      • Refutation
        • B(g);XQ(H)
    • Try
      • Q(H);CHECK
      • Vars
        • Q(c);CHECK,N_GUARD,P_SPINQ(c)::QAR1(H),XQ(c)
      • Refutation
        • Q(c);CHECK,XQ(H)
  • Actual
    • R(K);P_PINS(f)
    • Threat
      • QAB1(H),XQ(c)
    • Vars
      • Q(c);CHECK,OGATE,XS(E)::B(A)+P(C),XQ(c)
      • Q(c);CHECK,N_GUARD::QAR2(H),XQ(c)
      • Q(c);CHECK,XB(B)::S(E),XQ(c)
      • Q(c);CHECK,OGATE::P(C),XQ(c)
      • Q(c);CHECK,N_GUARD::QAR1(H),XQ(c)
      • Q(c);CHECK,N_SPINS(f),OGATE::QAR1(H),XQ(c)
      • Q(c);CHECK,XQ(H)::S(E),XQ(c)
      • Q(c);OGATE,P_PINQ(H),XP(J)::QAB(H),XQ(c)
      • Q(c);OGATE,XR(G)::QAB1(H),XQ(c)
      • S(a);N_GUARD::QAR1(H)
      • Q(c);N_GUARD,N_SPINS(f)::QAR1(H)
      • Q(c);N_GUARD::S(I),XQ(c)
      • Q(c);OGATE::QAR1(H)
      • S(a);N_GUARD::QAR1(H),XS(a)
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