MESON Chess Problem Database

Problem Display
PID: 193983 (b3BBNq/p4n1p/3P4/3k1P2/3P2pK/1P1Rp1Pp/5N1p/1Q4b1 w - - 0 1)

Haring, WH

Brisbane Courier, 1916

b3BBNq/p4n1p/3P4/3k1P2/3P2pK/1P1Rp1Pp/5N1p/1Q4b1

#2

12 + 11

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qf6+
      • 2.Sxf6#
    • 1...Bxf2
      • 2.Qh1#
    • 1...Bc6
      • 2.Bxf7#
    • 1...Sxd6
      • 2.Se7#
  • Tries
    • 1.Qa1?
      • threat
        • 2.Qa5#
      • 1...Qf6+
        • 2.Sxf6#
      • 1...Bxf2
        • 2.Qh1#
      • 1...Sxd6
        • 2.Se7#
      • 1...Bc6
        • 2.Bxf7#
      • 1...a5
        • 2.Qxa5#
      • 1...exf2!
  • Keys
    • 1.Qe1!
      • threat
        • 2.Qa5#
      • 1...Qf6+
        • 2.Sxf6#
      • 1...Bxf2
        • 2.Qh1#
      • 1...Sxd6
        • 2.Se7#
      • 1...exf2
        • 2.Qe6#
      • 1...Bc6
        • 2.Bxf7#
      • 1...a5
        • 2.Qxa5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(k);CHECK,N_GUARD::S(L),XQ(k)
    • B(a);OGATE,P_PINP(E),XS(B)::QAB(A)
    • B(j);SBLOCK::B(J),XS(h)
    • S(h);SBLOCK,XP(I)::S(L)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR(A)
      • Vars
        • Q(k);CHECK,N_GUARD::S(L),XQ(k)
        • B(a);OGATE,P_PINP(E),XS(B)::QAB(A)
        • S(h);SBLOCK,XP(I)::S(L)
        • B(j);SBLOCK::B(J),XS(h)
        • P(g);::QAR(A),XP(g)
      • Refutation
        • P(c);XS(B)
  • Actual
    • Q(A);
    • Threat
      • QAR(A)
    • Vars
      • Q(k);CHECK,N_GUARD::S(L),XQ(k)
      • B(a);OGATE,P_PINP(E),XS(B)::QAB(A)
      • S(h);SBLOCK,XP(I)::S(L)
      • P(c);OGATE,XS(B)::QAB1(A)
      • B(j);SBLOCK::B(J),XS(h)
      • P(g);::QAR(A),XP(g)
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