MESON Chess Problem Database

Problem Display
PID: 230123 (8/8/8/3p4/2pBk1P1/1pPpPpp1/1K1R3b/7Q w - - 0 1)

Lawton, Howard

Southend Times, 1937

(First published on Wed Aug 18 1937)

8/8/8/3p4/2pBk1P1/1pPpPpp1/1K1R3b/7Q

#2

7 + 8

15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bg1
      • 2.Qh7#
  • Tries
    • 1.Re2?
      • 1...dxe2
        • 2.Qb1#
      • 1...d2
        • 2.Qb1#
      • 1...Bg1
        • 2.Qh7#
      • 1...g2!
    • 1.Qxh2?
      • threat
        • 2.Qh7#
      • 1...f2
        • 2.Qg2#
      • 1...gxh2!
  • Keys
    • 1.Rg2!
      • 1...fxg2
        • 2.Qxg2#
      • 1...d2
        • 2.Qb1#
      • 1...f2
        • 2.Rxg3#
      • 1...Bg1
        • 2.Qh7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • B(a);OGATE::QAB(A)
  • Tries
    • Try
      • R(C);
      • Vars
        • P(c);OGATEB,XR(C)::QAB(A)
        • P(c);OGATEB::QAB(A)
        • B(a);OGATE::QAB(A)
      • Refutation
        • P(e);N_SPINP(d)
    • Try
      • Q(A);N_PINP(d),XB(a)
      • Threat
        • QAB(A)
      • Vars
        • P(d);OGATEB::QAB(A)
      • Refutation
        • P(e);XQ(A)
  • Actual
    • R(C);N_PINP(d)
    • Vars
      • P(d);OGATE,P_SPINP(d),XR(C)::QAB(A),XP(d)
      • P(c);OGATEB::QAB(A)
      • P(d);OGATEB::QAB(A)+R(C),XP(e)
      • B(a);OGATE::QAB(A)
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