MESON Chess Problem Database

Problem Display
PID: 81576 (1b6/7N/5N2/8/7k/3n2R1/7K/6Q1 w - - 0 1)

Macleod, Norman Alasdair

Comm., Deutsche Schachzeitung, 1983

1b6/7N/5N2/8/7k/3n2R1/7K/6Q1

#2

5 + 3

6455 The Chessboard Adventures of Norman Macleod 1996
3713 Snap 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bxg3+
      • 2.Qxg3#
    • 1...Ba7
      • 2.Rh3#
      • 2.Rg4#
    • 1...Sf4
      • 2.Rg4#
    • 1...Se5
      • 2.Rh3#
  • Tries
    • 1.Sg5?
      • threat
        • 2.Sf3#
      • 1...Bxg3+
        • 2.Qxg3#
      • 1...Se5
        • 2.Rh3#
      • 1...Se1!
    • 1.Qe3?
      • threat
        • 2.Qg5#
        • 2.Qh6#
      • 1...Bxg3+
        • 2.Qxg3#
      • 1...Sf4
        • 2.Rg4#
      • 1...Bf4!
    • 1.Qd4+?
      • 1...Sf4
        • 2.Rh3#
        • 2.Rg4#
      • 1...Bf4!
    • 1.Qd1?
      • threat
        • 2.Qg4#
        • 2.Qh5#
      • 1...Sf2
        • 2.Qh5#
      • 1...Sf4
        • 2.Rg4#
        • 2.Qg4#
      • 1...Se5
        • 2.Rh3#
        • 2.Qh5#
      • 1...Bxg3+!
    • 1.Qg2?
      • threat
        • 2.Qh3#
      • 1...Bxg3+
        • 2.Qxg3#
      • 1...Sf4
        • 2.Rg4#
      • 1...Sf2!
  • Keys
    • 1.Sf8!
      • threat
        • 2.Sg6#
      • 1...Bxg3+
        • 2.Qxg3#
      • 1...Sf4
        • 2.Rg4#
      • 1...Se5
        • 2.Rh3#

This anticipates 48418(1994)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • B(c);CHECK,OGATE,XR(C)::QAB1(A),XB(c)
    • S(a);N_PINR(C)::R1(C)
  • Tries
    • Try
      • S(E);
      • Threat
        • S(E)
      • Vars
        • B(c);CHECK,OGATE,XR(C)::QAB1(A),XB(c)
        • S(a);N_PINR(C)::R1(C)
      • Refutation
        • S(a);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(c);CHECK,OGATE,XR(C)::QAB1(A),XB(c)
        • S(a);N_PINR(C)::R1(C)
      • Refutation
        • B(c);
    • Try
      • Q(A);CHECK
      • Refutation
        • B(c);P_SPINB(c)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::QAR1(A)
      • Refutation
        • B(c);CHECK,XR(C)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • B(c);CHECK,OGATE,XR(C)::QAB1(A),XB(c)
        • S(a);N_PINR(C)::R1(C)
      • Refutation
        • S(a);
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • B(c);CHECK,OGATE,XR(C)::QAB1(A),XB(c)
      • S(a);N_PINR(C)::R1(C)
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