MESON Chess Problem Database

Problem Display
PID: 266265 (1R4b1/Nn6/p7/p6Q/2k5/2PNpp2/1P1R4/5BbK w - - 0 1)

Williams, E

Sunday Referee, 1937

(First published on Sun Feb 21 1937)

1R4b1/Nn6/p7/p6Q/2k5/2PNpp2/1P1R4/5BbK

#2

9 + 8

15239 Valois Notebooks 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Bf7
      • 2.Qxf7#
    • 1...Bh7
      • 2.Qf7#
    • 1...Sc5
      • 2.Se5#
      • 2.Qxc5#
    • 1...Sd6
      • 2.Qc5#
    • 1...Sd8
      • 2.Qc5#
    • 1...exd2
      • 2.Sc1#
      • 2.Sc5#
  • Tries
    • 1.Se5+?
      • 1...Kc5
        • 2.Sd7#
      • 1...Kb3!
    • 1.Qg4+?
      • 1...Kb3
        • 2.Sc1#
      • 1...Kd5!
    • 1.Qh4+?
      • 1...Kb3
        • 2.Sc1#
      • 1...Kd5!
    • 1.Qxa5?
      • threat
        • 2.Qa2#
      • 1...Kb3
        • 2.Sc1#
        • 2.Sc5#
      • 1...Sc5
        • 2.Se5#
        • 2.Qxc5#
      • 1...Sxa5!
    • 1.Qc5+?
      • 1...Sxc5
        • 2.Se5#
      • 1...Kb3!
  • Keys
    • 1.Qe8!
      • threat
        • 2.Qxg8#
      • 1...Kb3
        • 2.Sc1#
      • 1...Kd5
        • 2.Qc6#
      • 1...Bd5
        • 2.Qa4#
      • 1...Be6
        • 2.Qxe6#
      • 1...Bf7
        • 2.Qxf7#
      • 1...Bh7
        • 2.Qf7#
        • 2.Qe6#
      • 1...Sc5
        • 2.Se5#
      • 1...Sd6
        • 2.Qc6#
      • 1...Sd8
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • B(h);N_GUARD::QAB(G),XB(h)
    • B(h);N_GUARD::QAB(G)
    • S(g);N_GUARD::QAR1(G)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(d);N_GUARD,P-FLIGHT::QAR(G)+S(F),DCHECK
      • Refutation
        • K(d);P_SPINS(g),S_FLIGHT
    • Try
      • Q(G);CHECK
      • Vars
        • K(d);N_GUARD,P_SPINS(g),S_FLIGHT::S(F)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(G);CHECK
      • Vars
        • K(d);N_GUARD,P_SPINS(g),S_FLIGHT::S(F)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(G);XP(e)
      • Threat
        • QAB(G)
      • Refutation
        • S(g);XQ(G)
    • Try
      • Q(G);CHECK
      • Vars
        • S(g);SBLOCK,XQ(G)::B(A)+S(F),DCHECK
      • Refutation
        • K(d);P_SPINS(g),S_FLIGHT
  • Actual
    • Q(G);
    • Threat
      • QAB(G),XB(h)
    • Vars
      • K(d);N_GUARD,P_SPINS(g),S_CUTP(b),S_FLIGHT::S(F)
      • K(d);N_GUARD,S_CUTS(g),S_FLIGHT::QAB1(G)
      • B(h);SBLOCK::QAR2(G)
      • B(h);N_GUARD::QAB(G),XB(h)
      • S(g);SBLOCK::B(A)+S(F),DCHECK
      • S(g);N_GUARD::QAR2(G)
      • S(g);::QAR2(G)
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