MESON Chess Problem Database

Problem Display
PID: 194249 (4b3/N1b4r/3p2pq/8/kP3pQ1/NR5p/n2K4/3B4 w - - 0 1)

Sparke, Arthur M

Pittsburgh Gazette-Times, 1917

4b3/N1b4r/3p2pq/8/kP3pQ1/NR5p/n2K4/3B4

#2

7 + 10

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Bf7
      • 2.Qd7#
    • 1...f3+
      • 2.Re3#
  • Tries
    • 1.Sc4?
      • threat
        • 2.Sb2#
        • 2.Rb1#
        • 2.Rb2#
      • 1...Sxb4
        • 2.Ra3#
      • 1...Qg7
        • 2.Rb1#
        • 2.Rb2#
      • 1...Sc1
        • 2.Sb2#
      • 1...Sc3
        • 2.Sb2#
      • 1...f3+!
  • Keys
    • 1.Sb1!
      • threat
        • 2.Rb2#
      • 1...f3+
        • 2.Re3#
      • 1...Sxb4
        • 2.Ra3#
      • 1...Bf7
        • 2.Qd7#
      • 1...Sc1
        • 2.Sc3#
      • 1...Sc3
        • 2.Sxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • B(j);N_GUARD,S_CUTR(i)::QAB(F)
    • P(d);CHECK::B(A)+R(D)
  • Tries
    • Try
      • S(C);
      • Threat
        • DUALS(3)
      • Vars
        • S(a);SBLOCK,XP(E)::B(A)+R(D),DCHECK
        • S(a);::S(C)
      • Refutation
        • P(d);CHECK
  • Actual
    • S(C);
    • Threat
      • B(A)+R(D)
    • Vars
      • P(d);CHECK::B(A)+R(D)
      • S(a);SBLOCK,XP(E)::B(A)+R(D),DCHECK
      • B(j);N_GUARD,S_CUTR(i)::QAB(F)
      • S(a);N_GUARD::S(C)
      • S(a);N_GUARD::S(C),XS(a)
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