MESON Chess Problem Database

Problem Display
PID: 60711 (2N5/r3pR1K/5P2/1PRBk3/2P1p1P1/8/4b1N1/b5Q1 w - - 0 1)

McIntyre, Donald Glenoe

Queenstown Daily Representative, 1935

2N5/r3pR1K/5P2/1PRBk3/2P1p1P1/8/4b1N1/b5Q1

#2

11 + 6

5639 Some Problems For My Friends 1957
3713 Snap 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Rb7
      • 2.Qxa1#
    • 1...Rc7
      • 2.Qxa1#
    • 1...Rd7
      • 2.Qxa1#
    • 1...Bd4
      • 2.Qh2#
    • 1...Bxc4
      • 2.Bxc4#
    • 1...e3
      • 2.Qxe3#
    • 1...e6
      • 2.Bc6#
      • 2.Bb7#
      • 2.Ba8#
  • Tries
    • 1.Bxe4+?
      • 1...Kxe4
        • 2.Qe3#
      • 1...Ke6!
    • 1.fxe7?
      • threat
        • 2.Rf5#
      • 1...Rxe7
        • 2.Qxa1#
      • 1...e3
        • 2.Qxe3#
      • 1...Bxg4!
  • Keys
    • 1.Rf8!
      • threat
        • 2.Bg8#
      • 1...exf6+
        • 2.Bf7#
      • 1...e6+
        • 2.Bb7#
      • 1...Bxc4
        • 2.Bxc4#
      • 1...e3
        • 2.Qxe3#
      • 1...Rc7
        • 2.Qxa1#
      • 1...Rd7
        • 2.Qxa1#
      • 1...Bd4
        • 2.Qh2#

Anticipated by 6171(1927)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(e);N_GUARD::QAB(A),XB(a)
    • B(a);SBLOCK::QAB(A)
    • B(b);OGATE,XP(C)::R(F)+B(G),XB(b)
    • P(c);OGATEB::QAR2(A),XP(c)
  • Tries
    • Try
      • B(G);CHECK,XP(c)
      • Vars
        • K(d);P-FLIGHT,XB(G)::QAR1(A)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • P(H);XP(f)
      • Threat
        • R1(I)
      • Vars
        • R(e);N_GUARD,P_PINR(I),XP(H)::QAB(A),XB(a)
        • P(c);OGATEB::QAR2(A),XP(c)
      • Refutation
        • B(b);XP(D)
  • Actual
    • R(I);
    • Threat
      • R(F)+B(G)
    • Vars
      • P(f);CHECK,SBLOCK,XP(H)::R(F)+B(G)
      • P(f);CHECK,SBLOCK::R(F)+B(G)
      • B(b);OGATE,XP(C)::R(F)+B(G),XB(b)
      • P(c);OGATEB::QAR2(A),XP(c)
      • R(e);N_GUARD::QAB(A),XB(a)
      • B(a);SBLOCK::QAB(A)
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