MESON Chess Problem Database

Problem Display
PID: 144792 (7r/b3pQ1q/K3p3/8/2R1NN1k/4Bp1P/5P2/5B1r w - - 0 1)

Stanley, Cyril (Kipping, Cyril Stanley)

Chess, 1954

7r/b3pQ1q/K3p3/8/2R1NN1k/4Bp1P/5P2/5B1r

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe4
      • 2.Qxe7#
    • 1...Ra8
      • 2.Qxh7#
    • 1...Rb8
      • 2.Qxh7#
    • 1...Rc8
      • 2.Qxh7#
    • 1...Rd8
      • 2.Qxh7#
    • 1...Re8
      • 2.Qxh7#
    • 1...Rf8
      • 2.Qxh7#
    • 1...Rg8
      • 2.Qxh7#
  • Tries
    • 1.Sg5?
      • threat
        • 2.Sg2#
        • 2.Sxf3#
      • 1...Kxg5
        • 2.Sxe6#
      • 1...Qxf7
        • 2.Sxf3#
      • 1...Rxh3
        • 2.Sg2#
      • 1...Bxe3
        • 2.Sxf3#
      • 1...Qg6
        • 2.Sxf3#
      • 1...Qh5
        • 2.Sg2#
        • 2.Sg6#
      • 1...Bd4
        • 2.Sxf3#
      • 1...Qe4!
    • 1.Sg6+?
      • 1...Kh5
        • 2.Sg3#
      • 1...Qxg6!
  • Keys
    • 1.Sd2!
      • threat
        • 2.Sxf3#
      • 1...Kg5
        • 2.Sxe6#
      • 1...Rxh3
        • 2.Sg2#
      • 1...Qe4
        • 2.Qxe7#
      • 1...Qh5
        • 2.Sg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • Q(g);N_GUARD,XS(F)::QAB(I),XP(f)
    • R(h);N_GUARD::QAR(I),XQ(g)
  • Tries
    • Try
      • S(F);
      • Threat
        • DUALS(2)
      • Vars
        • K(c);S_FLIGHT,XS(F)::B(C)+S(G),DCHECK,XP(d)
        • Q(g);XQ(I)::S(F),XP(b)
        • R(a);XP(D)::R(E)+S(G),DCHECK
        • B(e);XB(C)::S(F),XP(b)
        • Q(g);::S(F),XP(b)
        • B(e);::S(F),XP(b)
      • Refutation
        • Q(g);
    • Try
      • S(G);CHECK
      • Vars
        • K(c);P-FLIGHT::S(F)
      • Refutation
        • Q(g);XS(G)
  • Actual
    • S(F);
    • Threat
      • S(F),XP(b)
    • Vars
      • K(c);S_FLIGHT::B(C)+S(G),DCHECK,XP(d)
      • R(a);SBLOCK,XP(D)::R(E)+S(G),DCHECK
      • Q(g);N_GUARD::QAB(I),XP(f)
      • Q(g);SBLOCK::R(E)+S(G),DCHECK
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