MESON Chess Problem Database

Problem Display
PID: 163942 (4K1nQ/1B6/3pk1p1/6P1/7N/3rP3/3p4/1b6 w - - 0 1)

Holroyd, GC

The Observer, 1926

(First published on Sun Jan 3 1926)

4K1nQ/1B6/3pk1p1/6P1/7N/3rP3/3p4/1b6

#2

6 + 7

15239 Valois Notebooks 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Rd5
      • 2.Bc8#
    • 1...Sf6+
      • 2.Qxf6#
    • 1...Sh6
      • 2.Qf6#
    • 1...Se7
      • 2.Qf6#
  • Tries
    • 1.e4?
      • threat
        • 2.Bc8#
      • 1...Sf6+
        • 2.Qxf6#
      • 1...Rc3
        • 2.Bd5#
      • 1...Se7
        • 2.Qf6#
      • 1...d5!
  • Keys
    • 1.Sf3!
      • threat
        • 2.Qh3#
      • 1...Sf6+
        • 2.Qxf6#
      • 1...Kf5
        • 2.Qh3#
      • 1...Rxe3
        • 2.Sd4#
      • 1...d5
        • 2.Qe5#
      • 1...Ra3
        • 2.Sd4#
      • 1...Rb3
        • 2.Sd4#
      • 1...Rc3
        • 2.Sd4#
      • 1...Rd4
        • 2.Sxd4#
      • 1...Rd5
        • 2.Bc8#
      • 1...Sh6
        • 2.Qf6#
      • 1...Se7
        • 2.Qf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • R(c);SBLOCK::B(D)
    • S(g);CHECK,N_GUARD::QAR1(F),XS(g)
    • S(g);N_GUARD::QAR1(F)
  • Tries
    • Try
      • P(A);
      • Threat
        • B(D)
      • Vars
        • S(g);CHECK,N_GUARD::QAR1(F),XS(g)
        • R(c);N_GUARD::B(D)
        • S(g);N_GUARD::QAR1(F)
      • Refutation
        • P(d);
  • Actual
    • S(B);
    • Threat
      • QAB(F)
    • Vars
      • S(g);CHECK,N_GUARD::QAR1(F),XS(g)
      • K(e);S_FLIGHT::QAB(F)
      • R(c);N_GUARD,XP(A)::S(B)
      • P(d);N_GUARD::QAR1(F)
      • R(c);N_GUARD::S(B)
      • R(c);N_GUARD::S(B),XR(c)
      • R(c);SBLOCK::B(D)
      • S(g);N_GUARD::QAR1(F)
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