MESON Chess Problem Database

Problem Display
PID: 21289 (4Q3/6N1/N2p4/r2k1p2/1p6/1p1K4/1P6/8 w - - 0 1)

Bernard, Henry D'Oyly

HM., Chess Amateur (The), 1918

4Q3/6N1/N2p4/r2k1p2/1p6/1p1K4/1P6/8

#2

5 + 6

2681 All Change Here! 1919
3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Qb5#
    • 1...Ra2
      • 2.Qb5#
    • 1...Ra3
      • 2.Qb5#
    • 1...Ra4
      • 2.Qb5#
    • 1...Rb5
      • 2.Qxb5#
    • 1...Rc5
      • 2.Sxb4#
    • 1...Rxa6
      • 2.Qb5#
    • 1...f4
      • 2.Qe4#
  • Tries
    • 1.Sh5?
      • threat
        • 2.Sf4#
        • 2.Sf6#
      • 1...f4
        • 2.Sxf4#
        • 2.Sf6#
        • 2.Qe4#
      • 1...Rxa6!
    • 1.Qf7+?
      • 1...Ke5
        • 2.Qxf5#
      • 1...Kc6!
  • Keys
    • 1.Sb8!
      • 1...Kc5
        • 2.Qc6#
      • 1...Ra1
        • 2.Qb5#
      • 1...Ra2
        • 2.Qb5#
      • 1...Ra3
        • 2.Qb5#
      • 1...Ra4
        • 2.Qb5#
      • 1...Rb5
        • 2.Qxb5#
      • 1...Rc5
        • 2.Qe6#
      • 1...Ra6
        • 2.Qb5#
      • 1...Ra7
        • 2.Qb5#
      • 1...Ra8
        • 2.Qb5#
      • 1...f4
        • 2.Qh5#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(c);N_GUARD::QAR2(E)
    • R(c);N_GUARD::QAR2(E),XR(c)
    • R(c);SBLOCK::S(C),XP(b)
    • R(c);N_GUARD,XS(C)::QAR2(E)
    • P(e);N_GUARD::QAB1(E)
  • Tries
    • Try
      • S(D);
      • Threat
        • DUALS(2)
      • Refutation
        • R(c);XS(C)
    • Try
      • Q(E);CHECK
      • Vars
        • K(d);P-FLIGHT::QAR1(E),XP(e)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • S(C);
    • Vars
      • K(d);P-FLIGHT::QAR1(E)
      • R(c);N_GUARD::QAR2(E)
      • R(c);N_GUARD::QAR2(E),XR(c)
      • R(c);SBLOCK::QAB1(E)
      • P(e);OGATEB::QAR(E)
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