MESON Chess Problem Database

Problem Display
PID: 9667 (1b3KQ1/3B1N2/1p1PRp1p/pr1k4/N7/1nPP4/5qp1/1b6 w - - 0 1)

Blake, Percy Francis

Western Daily Mercury, 1907

1b3KQ1/3B1N2/1p1PRp1p/pr1k4/N7/1nPP4/5qp1/1b6

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qc5
      • 2.Qxg2#
    • 1...Rc5
      • 2.Sxb6#
    • 1...Bxd6+
      • 2.Rxd6#
    • 1...Sd4
      • 2.c4#
    • 1...f5
      • 2.Re5#
  • Tries
    • 1.Sd8?
      • threat
        • 2.Bc6#
      • 1...Bxd6+
        • 2.Re7#
      • 1...Qc5
        • 2.Qxg2#
      • 1...Rc5
        • 2.Sxb6#
      • 1...Sd4
        • 2.c4#
      • 1...Bxd3!
    • 1.Qxg2+?
      • 1...Qf3
        • 2.Qxf3#
      • 1...Qxg2!
    • 1.Qg5+?
      • 1...Qf5
        • 2.Qxf5#
      • 1...fxg5
        • 2.Re5#
      • 1...f5
        • 2.Re5#
      • 1...hxg5!
  • Keys
    • 1.Se5!
      • threat
        • 2.Bc6#
      • 1...Bxd6+
        • 2.Re7#
      • 1...fxe5+
        • 2.Rf6#
      • 1...Qc5
        • 2.Qxg2#
      • 1...Rc5
        • 2.Sxb6#
      • 1...Sd4
        • 2.c4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • Q(b);N_GUARD,P_PINP(D)::QAB(I),XP(c)
    • R(f);N_GUARD,SBLOCK,S_CUTQ(b)::S(C),XP(h)
    • B(k);CHECK,OGATE,XP(D)::R1(E),XB(k)
    • S(d);SBLOCK::P(A)
    • P(i);N_GUARD::R1(E)
  • Tries
    • Try
      • S(G);
      • Threat
        • B(F)
      • Vars
        • B(k);CHECK,SBLOCK,XP(D)::QAB(I)+R(E)
        • Q(b);N_GUARD,P_PINP(D)::QAB(I),XP(c)
        • R(f);N_GUARD,SBLOCK,S_CUTQ(b)::S(C),XP(h)
        • S(d);SBLOCK::P(A)
      • Refutation
        • B(a);XP(B)
    • Try
      • Q(I);CHECK,XP(c)
      • Vars
        • Q(b);N_GUARD,P_SPINQ(b)::QAB(I),XQ(b)
      • Refutation
        • Q(b);XQ(I)
    • Try
      • Q(I);CHECK
      • Vars
        • Q(b);N_GUARD,P_SPINQ(b)::QAR2(I),XQ(b)
        • P(i);N_GUARD,P_PINS(G),XQ(I)::R1(E)
        • P(i);N_GUARD,P_SPINP(i)::R1(E)
      • Refutation
        • P(j);XQ(I)
  • Actual
    • S(G);
    • Threat
      • B(F)
    • Vars
      • B(k);CHECK,SBLOCK,XP(D)::QAB(I)+R(E)
      • P(i);CHECK,SBLOCK,XS(G)::QAB(I)+R(E)
      • Q(b);N_GUARD,P_PINP(D)::QAB(I),XP(c)
      • R(f);N_GUARD,SBLOCK,S_CUTQ(b)::S(C),XP(h)
      • S(d);SBLOCK::P(A)
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