MESON Chess Problem Database

Problem Display
PID: 193885 (4Q1b1/3p4/2p5/p7/4R3/PkN5/1P5b/1K4n1 w - - 0 1)

Janet, Frank

Pittsburgh Gazette-Times, 1916

4Q1b1/3p4/2p5/p7/4R3/PkN5/1P5b/1K4n1

#2

6 + 7

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Bd6
      • 2.Qxg8#
    • 1...Bb8
      • 2.Qxb8#
    • 1...a4
      • 2.Rb4#
    • 1...d6
      • 2.Qb8#
  • Tries
    • 1.Qxd7?
      • threat
        • 2.Qd1#
        • 2.Qb7#
      • 1...Bc7
        • 2.Qd1#
      • 1...Bc4
        • 2.Qd1#
      • 1...Bd5
        • 2.Qb7#
      • 1...Bd6!
    • 1.Qf7+?
      • 1...d5
        • 2.Qb7#
      • 1...Bxf7!
  • Keys
    • 1.Sa4!
      • threat
        • 2.Sc5#
      • 1...Bd6
        • 2.Qxg8#
      • 1...c5
        • 2.Sxc5#
      • 1...d6
        • 2.Qb8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • B(b);S_CUTP(f)::QAB(F),XB(g)
    • B(b);N_GUARD::QAR(F),XB(b)
    • P(d);N_GUARD::R1(E)
    • P(f);S_CUTB(b)::QAR(F)
  • Tries
    • Try
      • Q(F);XP(f)
      • Threat
        • DUALS(2)
      • Vars
        • B(b);::QAB(F)
        • B(g);::QAB(F)
        • B(g);::QAR(F)
      • Refutation
        • B(b);
    • Try
      • Q(F);CHECK
      • Vars
        • P(f);OGATE,P_SPINP(f)::QAR(F)
      • Refutation
        • B(g);XQ(F)
  • Actual
    • S(D);
    • Threat
      • S(D)
    • Vars
      • B(b);S_CUTP(f)::QAB(F),XB(g)
      • P(e);::S(D),XP(e)
      • P(f);S_CUTB(b)::QAR(F)
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