MESON Chess Problem Database

Problem Display
PID: 230239 (3b1Nr1/5BnN/1p3p1p/8/r3p2k/6qP/p5P1/Q3B1K1 w - - 0 1)

Lawton, Howard

Southend Times, 1938

(First published on Wed Apr 27 1938)

3b1Nr1/5BnN/1p3p1p/8/r3p2k/6qP/p5P1/Q3B1K1

#2

8 + 11

15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe1+
      • 2.Qxe1#
    • 1...Qf2+
      • 2.Bxf2#
    • 1...Bc7
      • 2.Qxf6#
    • 1...h5
      • 2.Sg6#
  • Keys
    • 1.Qd1!
      • threat
        • 2.Sg6#
        • 2.Qg4#
      • 1...Qxe1+
        • 2.Qxe1#
      • 1...Qf2+
        • 2.Bxf2#
      • 1...Rxf8
        • 2.Qg4#
      • 1...Sf5
        • 2.Qh5#
      • 1...Sh5
        • 2.Qxh5#
      • 1...Se6
        • 2.Qh5#
      • 1...Se8
        • 2.Qh5#
      • 1...e3
        • 2.Sg6#
        • 2.Qxa4#
      • 1...f5
        • 2.Sg6#
        • 2.Qxd8#
      • 1...h5
        • 2.Sg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • Q(b);CHECK,N_PINP(D),N_SPINQ(b),OGATE,XB(B)::QAB(A),XQ(b)
    • Q(b);CHECK,N_PINP(D),OGATEB::B(B),XQ(b)
    • B(j);N_GUARD::QAB(A),XP(g)
    • P(h);SBLOCK::S(H)
  • Actual
    • Q(A);
    • Threat
      • DUALS(2)
    • Vars
      • Q(b);CHECK,N_PINP(D),N_SPINQ(b),OGATE,XB(B)::QAB(A),XQ(b)
      • Q(b);CHECK,N_PINP(D),OGATEB::B(B),XQ(b)
      • R(k);XS(H)::QAR1(A)
      • S(i);N_GUARD::QAR1(A)
      • S(i);N_GUARD::QAR1(A),XS(i)
      • P(h);::S(H)
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