MESON Chess Problem Database

Problem Display
PID: 227228 (1B6/1n1Nb2K/1r5p/5p1r/R2Pk3/2R1N2p/8/3Q2n1 w - - 0 1)

Watts, William

Sunday Chronicle, 1946

(First published on Sun Nov 3 1946)

1B6/1n1Nb2K/1r5p/5p1r/R2Pk3/2R1N2p/8/3Q2n1

#2

8 + 9

15239 Valois Notebooks 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rd6
      • 2.d5#
    • 1...Se2
      • 2.Qh1#
    • 1...Sf3
      • 2.Qc2#
      • 2.Qd3#
  • Tries
    • 1.Qg4+?
      • 1...f4
        • 2.Qxf4#
      • 1...fxg4!
  • Keys
    • 1.Qf1!
      • threat
        • 2.Qf4#
      • 1...Rh4
        • 2.Qxf5#
      • 1...Rd6
        • 2.d5#
      • 1...Bg5
        • 2.Qxf5#
      • 1...Bd6
        • 2.Sf6#
      • 1...Se2
        • 2.Qh1#
      • 1...Sf3
        • 2.Qd3#
      • 1...Sd6
        • 2.Sc5#
      • 1...f4
        • 2.Qxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • R(f);N_GUARD,S_CUTB(i)::R(D)+P(E)
    • S(a);OGATE::QAB(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • P(d);P_SPINP(d)::QAR1(A),XP(d)
      • Refutation
        • P(d);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • R(e);N_GUARD::QAB1(A),XP(d)
      • R(f);N_GUARD,S_CUTB(i)::R(D)+P(E)
      • B(i);S_CUTR(e)::QAB1(A),XP(d)
      • B(i);N_GUARD,S_CUTR(f)::S(F)
      • S(a);OGATE::QAB(A)
      • S(a);SBLOCK::QAB1(A)
      • S(h);N_GUARD,S_CUTB(i)::S(F)
      • P(d);::QAR1(A),XP(d)
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