MESON Chess Problem Database

Problem Display
PID: 230327 (1bn1b3/4ppQ1/2p5/R3n3/1Npk4/2r1p1N1/1PP1K3/8 w - - 0 1)

Swords, WJ

Southend Times, 1938

(First published on Wed Dec 28 1938)

1bn1b3/4ppQ1/2p5/R3n3/1Npk4/2r1p1N1/1PP1K3/8

#2

7 + 11

15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc2+
      • 2.Sxc2#
    • 1...Ba7
      • 2.Qxe5#
    • 1...Sd6
      • 2.Qxe5#
  • Tries
    • 1.Qf6?
      • threat
        • 2.Qf4#
      • 1...Rxc2+
        • 2.Sxc2#
      • 1...Sd6
        • 2.Qxe5#
      • 1...exf6!
  • Keys
    • 1.Qg5!
      • threat
        • 2.Qf4#
      • 1...Rxc2+
        • 2.Sxc2#
      • 1...Sd3
        • 2.Qxe3#
      • 1...Sf3
        • 2.Qc5#
      • 1...Sg4
        • 2.Qc5#
      • 1...Sg6
        • 2.Qc5#
      • 1...Sd7
        • 2.Sxc6#
      • 1...Sd6
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • R(a);CHECK,XP(B)::S(E),XR(a)
    • B(i);N_GUARD::QAB1(G),XS(e)
    • S(j);S_CUTB(i)::QAB1(G),XS(e)
  • Tries
    • Try
      • Q(G);
      • Threat
        • QAR2(G)
      • Vars
        • R(a);CHECK,XP(B)::S(E),XR(a)
        • S(j);S_CUTB(i)::QAB1(G),XS(e)
      • Refutation
        • P(g);N_SPINS(e),XQ(G)
  • Actual
    • Q(G);N_PINS(e)
    • Threat
      • QAR2(G)
    • Vars
      • R(a);CHECK,XP(B)::S(E),XR(a)
      • S(e);S_CUTR(a)::QAB1(G),XP(b)
      • S(e);OGATE::QAB1(G)
      • S(e);N_GUARD,S_CUTB(k)::S(E),XP(f)
      • S(j);S_CUTB(i)::QAB1(G),XS(e)
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