MESON Chess Problem Database

Problem Display
PID: 60935 (K4nN1/6Rp/8/1Q1P3k/6pr/7p/5P2/7b w - - 0 1)

McIntyre, Donald Glenoe

Queenstown Daily Representative, 1940

K4nN1/6Rp/8/1Q1P3k/6pr/7p/5P2/7b

#2

6 + 7

5639 Some Problems For My Friends 1957

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd5+
      • 2.Qxd5#
    • 1...Se6
      • 2.Qe8#
    • 1...h6
      • 2.Sf6#
  • Tries
    • 1.Qd3?
      • threat
        • 2.Qf5#
      • 1...Bxd5+
        • 2.Qxd5#
      • 1...Se6
        • 2.Qxh7#
      • 1...Be4!
    • 1.Qc6?
      • threat
        • 2.Qh6#
      • 1...Bxd5
        • 2.Qxd5#
      • 1...Se6
        • 2.Qe8#
      • 1...h6
        • 2.Sf6#
        • 2.Qxh6#
      • 1...Sg6!
  • Keys
    • 1.f4!
      • threat
        • 2.Rg5#
      • 1...Bxd5+
        • 2.Qxd5#
      • 1...gxf4 ep
        • 2.d6#
      • 1...Se6
        • 2.Qe8#
      • 1...Sg6
        • 2.Rxh7#
      • 1...h6
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(a);CHECK,OGATE,P_SPINB(a),XP(C)::QAR(B),XB(a)
    • S(g);N_GUARD::QAB(B)
    • P(f);SBLOCK::S(F)
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAR2(B)
      • Vars
        • B(a);CHECK,OGATE,XP(C)::QAR(B),XB(a)
        • S(g);N_GUARD::QAR2(B),XP(f)
      • Refutation
        • B(a);
    • Try
      • Q(B);N_SPINP(C)
      • Threat
        • QAR1(B)
      • Vars
        • B(a);OGATE,P_PINQ(B),XP(C)::QAR(B),XB(a)
        • S(g);N_GUARD::QAB(B)
      • Refutation
        • S(g);
  • Actual
    • P(A);
    • Threat
      • R1(D)
    • Vars
      • B(a);CHECK,OGATE,P_SPINB(a),XP(C)::QAR(B),XB(a)
      • P(c);EP,N_PINP(C),XP(A)::QAR(B)+P(C)
      • S(g);N_GUARD::QAB(B)
      • S(g);N_GUARD,SBLOCK::R(D),XP(f)
      • P(f);SBLOCK::S(F)
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