MESON Chess Problem Database

Problem Display
PID: 20943 (b7/q1p1N2K/1b1B1kPp/5B2/7P/8/p7/3Q4 w - - 0 1)

Wainwright, Joseph CJ

1st Prize, Good Companions (May), 1914

b7/q1p1N2K/1b1B1kPp/5B2/7P/8/p7/3Q4

#2

7 + 7

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

SOLUTION

  • SOUND
  • Sets
    • 1...cxd6
      • 2.Qxd6#
    • 1...c5
      • 2.Qa1#
  • Tries
    • 1.Bh3?
      • threat
        • 2.Sg8#
      • 1...cxd6
        • 2.Qxd6#
      • 1...Bd5
        • 2.Sxd5#
      • 1...c5
        • 2.Qa1#
      • 1...c6
        • 2.Qf3#
      • 1...Qb8!
    • 1.Bg4?
      • threat
        • 2.Sg8#
      • 1...cxd6
        • 2.Qxd6#
      • 1...Bd5
        • 2.Sxd5#
      • 1...c5
        • 2.Qa1#
      • 1...c6
        • 2.Qf3#
      • 1...Qb8!
    • 1.Bd7?
      • threat
        • 2.Sg8#
      • 1...cxd6
        • 2.Qxd6#
      • 1...Bd5
        • 2.Sxd5#
      • 1...Qb8!
    • 1.Qb3?
      • threat
        • 2.Qe6#
        • 2.Qf7#
      • 1...cxd6
        • 2.Qe6#
      • 1...Bd5!
    • 1.Qd5?
      • threat
        • 2.Sg8#
        • 2.Qe6#
        • 2.Qf7#
        • 2.Qe5#
      • 1...cxd6
        • 2.Qe6#
        • 2.Qxd6#
      • 1...a1Q
        • 2.Sg8#
        • 2.Qe6#
        • 2.Qf7#
      • 1...a1B
        • 2.Sg8#
        • 2.Qe6#
        • 2.Qf7#
      • 1...Qb8
        • 2.Qe6#
        • 2.Qf7#
        • 2.Qe5#
      • 1...Qa5
        • 2.Sg8#
        • 2.Qe6#
        • 2.Qf7#
      • 1...Bd4
        • 2.Sg8#
        • 2.Qe6#
        • 2.Qf7#
      • 1...c5
        • 2.Qe6#
        • 2.Qf7#
        • 2.Qe5#
      • 1...c6
        • 2.Qe6#
        • 2.Qf7#
        • 2.Qe5#
      • 1...Bxd5!
  • Keys
    • 1.Bc8!
      • threat
        • 2.Sg8#
      • 1...cxd6
        • 2.Qxd6#
      • 1...Bd5
        • 2.Sxd5#
      • 1...c5
        • 2.Qa1#
      • 1...c6
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(f);OGATE,P_PINS(F),XB(D)::QAR2(A),XP(f)
    • P(f);P_PINS(F),S_CUTB(b)::QAB(A)
  • Tries
    • Try
      • B(C);
      • Threat
        • S(F)
      • Vars
        • P(f);OGATE,P_PINS(F),XB(D)::QAR2(A),XP(f)
        • B(g);N_GUARD::S(F),XB(g)
        • P(f);P_PINS(F),S_CUTB(b)::QAB(A)
        • P(f);P_PINS(F),S_CUTB(g)::QAR(A)
      • Refutation
        • Q(e);
    • Try
      • B(C);
      • Threat
        • S(F)
      • Vars
        • P(f);OGATE,P_PINS(F),XB(D)::QAR2(A),XP(f)
        • B(g);N_GUARD::S(F),XB(g)
        • P(f);P_PINS(F),S_CUTB(b)::QAB(A)
        • P(f);P_PINS(F),S_CUTB(g)::QAR(A)
      • Refutation
        • Q(e);
    • Try
      • B(C);
      • Threat
        • S(F)
      • Vars
        • P(f);OGATE,XB(D)::QAR2(A),XP(f)
        • B(g);N_GUARD::S(F),XB(g)
      • Refutation
        • Q(e);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(f);P_PINS(F),XB(D)::QAR1(A)
      • Refutation
        • B(g);
    • Try
      • Q(A);
      • Threat
        • DUALS(4)
      • Refutation
        • B(g);XQ(A)
  • Actual
    • B(C);
    • Threat
      • S(F)
    • Vars
      • P(f);OGATE,P_PINS(F),XB(D)::QAR2(A),XP(f)
      • B(g);N_GUARD::S(F),XB(g)
      • P(f);P_PINS(F),S_CUTB(b)::QAB(A)
      • P(f);P_PINS(F),S_CUTB(g)::QAR(A)
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