MESON Chess Problem Database

Problem Display
PID: 230815 (8/4Q3/3n4/4qp2/4k3/1NrRBr2/2B5/Kn3R2 w - - 0 1)

von Lowenborg, Knut Otto

Tidskrift for Schack, 1913

8/4Q3/3n4/4qp2/4k3/1NrRBr2/2B5/Kn3R2

#2

7 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qe6
      • 2.Qxe6#
    • 1...Rxe3
      • 2.Rd4#
    • 1...Rg3
      • 2.Rf4#
    • 1...Rh3
      • 2.Rf4#
    • 1...Rf4
      • 2.Rxf4#
    • 1...Sd2
      • 2.Sxd2#
    • 1...Sa3
      • 2.Sd2#
    • 1...Sc4
      • 2.Sc5#
  • Keys
    • 1.Bf4!
      • threat
        • 2.Rd4#
        • 2.Qxe5#
      • 1...Rxc2+
        • 2.Rd4#
      • 1...Rxb3+
        • 2.Qxe5#
      • 1...Rcxd3+
        • 2.Qxe5#
      • 1...Rc5+
        • 2.Rd4#
      • 1...Kxf4
        • 2.Qh4#
      • 1...Qxe7
        • 2.Rd4#
      • 1...Rxf1
        • 2.Qxe5#
      • 1...Rfxd3
        • 2.Qxe5#
      • 1...Rxf4
        • 2.Re1#
      • 1...Qe6
        • 2.Rd4#
      • 1...Rf2
        • 2.Qxe5#
      • 1...Sc4
        • 2.Rd4#
      • 1...Sf7
        • 2.Rd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 10
    • REMOVED MATES = 5
  • Sets
    • Q(e);OGATEB::QAR2(G),XQ(e)
    • R(c);SBLOCK,XB(F)::B(C)+R(E),DCHECK
    • R(c);OGATE::R1(B)
    • R(c);OGATE::R1(B),XR(c)
    • S(a);N_GUARD::S(D),XS(a)
    • S(a);N_GUARD::S(D)
    • S(g);S_CUTR(b)::S(D)
  • Actual
    • B(F);
    • Threat
      • DUALS(2)
    • Vars
      • R(b);CHECK,XB(C)::R1(E)
      • R(b);CHECK,XS(D)::QAR1(G),XQ(e)
      • R(b);CHECK,P_SPINR(b),XR(E)::QAR1(G),XQ(e)
      • R(b);CHECK::B(C)+R(E),DCHECK
      • K(d);N_SPINQ(e),OGATEB,P-FLIGHT,P_SPINR(c),XB(F)::QAR2(G)
      • Q(e);N_SPINQ(e),XQ(G)::B(C)+R(E),DCHECK
      • R(c);XR(B)::QAR1(G),XQ(e)
      • R(c);P_SPINR(c),XR(E)::QAR1(G),XQ(e)
      • R(c);N_GUARD,SBLOCK,XB(F)::R(B)
      • Q(e);::B(C)+R(E),DCHECK
      • R(c);::QAR1(G),XQ(e)
      • S(g);::B(C)+R(E),DCHECK
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