MESON Chess Problem Database

Problem Display
PID: 256882 (1Q1K2BB/1N2pR2/1p6/3k1NbR/1p1P4/3P4/b7/4q3 w - - 0 1)

Andrade, Barry Jack da Costa

Watney, Charles Gold

British Chess Magazine, 1933

1Q1K2BB/1N2pR2/1p6/3k1NbR/1p1P4/3P4/b7/4q3

#2

10 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Ke6
      • 2.Rf6#
      • 2.Rf8#
    • 1...e5+
      • 2.Rf6#
    • 1...e6+
      • 2.Se7#
  • Tries
    • 1.Sxe7+?
      • 1...Ke6
        • 2.Rf1#
        • 2.Rf2#
        • 2.Rf3#
        • 2.Rf4#
        • 2.Rf5#
        • 2.Rf6#
        • 2.Rfh7#
        • 2.Rf8#
        • 2.Qd6#
        • 2.Qc8#
      • 1...Qxe7+!
    • 1.Rf6+?
      • 1...e6
        • 2.Qd6#
      • 1...Qe6!
    • 1.Rxe7+?
      • 1...Qe6
        • 2.Qd6#
      • 1...Kc6!
    • 1.Rfh7+?
      • 1...Qe6
        • 2.Sxe7#
      • 1...e6+
        • 2.Se7#
      • 1...Kc6!
    • 1.Rf8+?
      • 1...Qe6
        • 2.Sxe7#
      • 1...e6+
        • 2.Se7#
      • 1...Kc6!
  • Keys
    • 1.Qa8!
      • threat
        • 2.Sc5#
      • 1...e5+
        • 2.Rf6#
      • 1...e6+
        • 2.Se7#
      • 1...Kc6
        • 2.Sbd6#
      • 1...Ke6
        • 2.Rf6#
        • 2.Rf8#
      • 1...Qe6
        • 2.Sbd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(g);CHECK,N_GUARD,S_CUTQ(a)::B(I)+R(F)
    • P(g);CHECK,SBLOCK,S_CUTQ(a)::S(C)
  • Tries
    • Try
      • S(C);CHECK,P_PINB(e),P_SPINS(C),XP(g)
      • Refutation
        • Q(a);CHECK,XS(C)
    • Try
      • R(F);CHECK
      • Vars
        • P(g);P_PINR(F),P_SPINP(g)::QAR1(G)
      • Refutation
        • Q(a);P_SPINQ(a)
    • Try
      • R(F);CHECK,P_SPINR(F),XP(g)
      • Vars
        • Q(a);P_SPINQ(a)::QAR1(G)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • R(F);CHECK
      • Vars
        • Q(a);P_SPINQ(a)::S(C),XP(g)
        • P(g);CHECK,P_SPINP(g)::S(C)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • R(F);CHECK
      • Vars
        • Q(a);P_SPINQ(a)::S(C),XP(g)
        • P(g);CHECK,P_SPINP(g)::S(C)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • Q(G);
    • Threat
      • QAB(G)+S(E)
    • Vars
      • P(g);CHECK,N_GUARD,S_CUTQ(a)::B(I)+R(F)
      • P(g);CHECK,SBLOCK,S_CUTQ(a)::S(C)
      • K(d);N_GUARD,S_FLIGHT::QAB(G)+S(E)
      • Q(a);SBLOCK::QAB(G)+S(E)
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