MESON Chess Problem Database

Problem Display
PID: 21739 (6N1/3pp3/3P2p1/4k1Nb/6p1/3Q2K1/8/8 w - - 0 1)

Stewart, John

Good Companions (August), 1921

6N1/3pp3/3P2p1/4k1Nb/6p1/3Q2K1/8/8

#2

5 + 6

3132 The Good Companion Two-Mover 1922
3360 Simple Two-move Themes 1924
887 Mate in Two Moves 1931

SOLUTION

  • SOUND
  • Sets
    • 1...exd6
      • 2.Qe4#
    • 1...e6
      • 2.Sf7#
  • Tries
    • 1.Qd4+?
      • 1...Kf5
        • 2.Qf4#
      • 1...Kxd4!
    • 1.dxe7?
      • threat
        • 2.e8Q#
        • 2.e8R#
      • 1...d6
        • 2.Qe4#
        • 2.e8Q#
        • 2.e8R#
      • 1...d5!
  • Keys
    • 1.Qc4!
      • threat
        • 2.Qc5#
      • 1...Kf5
        • 2.Qf4#
      • 1...Kxd6
        • 2.Sf7#
      • 1...exd6
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • P(f);SBLOCK,XP(D)::QAR1(A)
    • P(f);SBLOCK::S(C)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
      • Refutation
        • K(b);S_FLIGHT,XQ(A)
    • Try
      • P(D);XP(f)
      • Threat
        • P=Q
      • Refutation
        • P(e);
  • Actual
    • Q(A);
    • Threat
      • QAR2(A)
    • Vars
      • K(b);P-FLIGHT::QAR1(A)
      • K(b);S_FLIGHT,XP(D)::S(C)
      • P(f);SBLOCK,XP(D)::QAR1(A)
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