MESON Chess Problem Database

Problem Display
PID: 16686 (1rN1R2b/BPR5/3p2K1/3k1P1N/5PQ1/2n4p/4n1q1/7B w - - 0 1)

Sheppard, Charles William

The Chess Review, 1942

1rN1R2b/BPR5/3p2K1/3k1P1N/5PQ1/2n4p/4n1q1/7B

#2

11 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4
      • 2.Se7#
    • 1...Ra8
      • 2.bxa8Q#
      • 2.bxa8B#
    • 1...Bf6
      • 2.Sxf6#
    • 1...Sd4
      • 2.Sb6#
    • 1...Sxf4+
      • 2.Sxf4#
    • 1...Se4
      • 2.Se7#
  • Tries
    • 1.Bxg2+?
      • 1...Se4
        • 2.Se7#
        • 2.Bxe4#
      • 1...hxg2!
    • 1.Re3?
      • threat
        • 2.Se7#
      • 1...Sxf4+
        • 2.Sxf4#
      • 1...Bf6
        • 2.Sxf6#
      • 1...Rxc8!
    • 1.Qxg2+?
      • 1...Se4
        • 2.Se7#
        • 2.Qxe4#
      • 1...hxg2!
  • Keys
    • 1.f6!
      • threat
        • 2.Qg5#
      • 1...Qe4+
        • 2.Qf5#
      • 1...Sxf4+
        • 2.Sxf4#
      • 1...Bxf6
        • 2.Sxf6#
      • 1...Sg3
        • 2.Qe6#
      • 1...Sd4
        • 2.Sb6#
      • 1...Se4
        • 2.Se7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • Q(b);N_PINQ(C),P_PINP(D)::S(J)
    • R(g);OGATE::PXR(g)=Q
    • B(h);N_GUARD::S(E),XB(h)
    • S(a);SBLOCK::S(J)
    • S(a);CHECK,XP(B)::S(E),XS(a)
    • S(c);N_SPINQ(b),SBLOCK::S(J)
  • Tries
    • Try
      • B(A);CHECK,N_SPINQ(C),XQ(b)
      • Refutation
        • P(d);XB(A)
    • Try
      • R(K);
      • Threat
        • S(J)
      • Vars
        • S(a);CHECK,XP(B)::S(E),XS(a)
        • B(h);N_GUARD::S(E),XB(h)
      • Refutation
        • R(g);XS(J)
    • Try
      • Q(C);CHECK,N_SPINQ(C),XQ(b)
      • Refutation
        • P(d);P_SPINP(d),XQ(C)
  • Actual
    • P(D);
    • Threat
      • QAR(C)
    • Vars
      • Q(b);CHECK,N_PINQ(C)::QAR2(C)
      • S(a);CHECK,XP(B)::S(E),XS(a)
      • B(h);XP(D)::S(E),XB(h)
      • S(a);N_PINQ(C)::QAB1(C)
      • S(a);SBLOCK::S(J)
      • S(c);N_SPINQ(b),SBLOCK::S(J)
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