MESON Chess Problem Database

Problem Display
PID: 150880 (2b2K2/8/1pQn4/k1p3B1/BpP5/2P5/3nR3/8 w - - 0 1)

Picton, PH

The Referee, 1926

(First published on Sun Dec 19 1926)

2b2K2/8/1pQn4/k1p3B1/BpP5/2P5/3nR3/8

#2

7 + 7

15239 Valois Notebooks 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Ka6
      • 2.Qa8#
    • 1...Bh3
      • 2.Qa8#
    • 1...Bg4
      • 2.Qa8#
    • 1...Bf5
      • 2.Qa8#
    • 1...Be6
      • 2.Qa8#
    • 1...Bd7
      • 2.Qa8#
    • 1...Sxc4
      • 2.Qb5#
    • 1...Se4
      • 2.Qb5#
    • 1...Sb5
      • 2.Qxb5#
    • 1...Sf5
      • 2.Qb5#
    • 1...Sb7
      • 2.Qb5#
    • 1...Sf7
      • 2.Qb5#
    • 1...Se8
      • 2.Qb5#
  • Tries
    • 1.Bd1?
      • threat
        • 2.Qa4#
      • 1...Ka6
        • 2.Qa8#
      • 1...Bd7
        • 2.Qa8#
      • 1...Sb3
        • 2.Ra2#
      • 1...Sb5
        • 2.Qxb5#
      • 1...b5
        • 2.Bd8#
      • 1...b3!
  • Keys
    • 1.Bb3!
      • threat
        • 2.Qa4#
      • 1...Ka6
        • 2.Qa8#
      • 1...Sxb3
        • 2.Ra2#
      • 1...Bd7
        • 2.Qa8#
      • 1...Sb5
        • 2.Qxb5#
      • 1...b5
        • 2.Bd8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 10
  • Sets
    • K(c);P-FLIGHT,P_SPINP(e)::QAR2(F)
    • B(g);N_GUARD,SBLOCK::QAR(F)
    • B(g);N_GUARD::QAR(F)
    • S(f);N_GUARD,XP(D)::QAR1(F)
    • S(f);N_GUARD::QAR1(F)
    • S(f);N_GUARD::QAR1(F),XS(f)
  • Tries
    • Try
      • B(C);
      • Threat
        • QAR1(F)
      • Vars
        • K(c);P-FLIGHT,P_SPINP(e)::QAR2(F)
        • B(g);N_GUARD::QAR(F)
        • S(a);OGATE::R(A)
        • S(f);N_GUARD::QAR1(F),XS(f)
        • P(e);OGATEB::B(E)
      • Refutation
        • P(b);
  • Actual
    • B(C);
    • Threat
      • QAR1(F)
    • Vars
      • K(c);P-FLIGHT,P_SPINP(e)::QAR2(F)
      • S(a);OGATE,XB(C)::R(A)
      • B(g);N_GUARD::QAR(F)
      • S(f);N_GUARD::QAR1(F),XS(f)
      • P(e);OGATEB::B(E)
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