MESON Chess Problem Database

Problem Display
PID: 60945 (2B1k2r/7p/7P/4N1B1/b5R1/3n1Q2/q1p5/2n2K2 w k - 0 1)

McIntyre, Donald Glenoe

South African Chess Magazine, 1946

2B1k2r/7p/7P/4N1B1/b5R1/3n1Q2/q1p5/2n2K2

#2

7 + 8

5639 Some Problems For My Friends 1957

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Qf7#
    • 1...Qf7
      • 2.Qxf7#
    • 1...Qa1
      • 2.Qf7#
    • 1...Qb2
      • 2.Qf7#
    • 1...Qa3
      • 2.Qf7#
    • 1...Bb3
      • 2.Bd7#
    • 1...Bd7
      • 2.Bxd7#
    • 1...Sb3
      • 2.Qf7#
  • Tries
    • 1.Rd4?
      • threat
        • 2.Rd8#
      • 1...Bd7
        • 2.Bxd7#
      • 1...Qd5!
    • 1.Qf6?
      • threat
        • 2.Qe7#
        • 2.Qd8#
      • 1...Sxe5
        • 2.Qe7#
      • 1...Qf7
        • 2.Qxf7#
      • 1...Qd5
        • 2.Qe7#
      • 1...Qe6
        • 2.Qd8#
      • 1...Qa3
        • 2.Qd8#
        • 2.Qf7#
      • 1...Rf8!
  • Keys
    • 1.Qa8!
      • threat
        • 2.Bf5#
        • 2.Ba6#
        • 2.Be6#
        • 2.Bb7#
        • 2.Bd7#
      • 1...Qf7+
        • 2.Bf5#
      • 1...Rf8+
        • 2.Bf5#
      • 1...0-0+
        • 2.Bf6#
      • 1...Kf8
        • 2.Bd7#
      • 1...Sxe5
        • 2.Be6#
      • 1...Qb1
        • 2.Bb7#
        • 2.Bd7#
      • 1...Qb3
        • 2.Bb7#
        • 2.Bd7#
      • 1...Qc4
        • 2.Bd7#
      • 1...Qd5
        • 2.Bd7#
      • 1...Qe6
        • 2.Bxe6#
        • 2.Bd7#
      • 1...Qb2
        • 2.Bb7#
        • 2.Bd7#
      • 1...Bb3
        • 2.Ba6#
        • 2.Bd7#
      • 1...Bb5
        • 2.Ba6#
        • 2.Bd7#
      • 1...Bc6
        • 2.Bd7#
      • 1...Bd7
        • 2.Bxd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 7
    • REMOVED MATES = 6
  • Sets
    • Q(b);N_GUARD::QAB1(B)
    • Q(b);N_GUARD,P_PINQ(B)::QAB1(B),XQ(b)
    • B(e);N_GUARD::B(G)
    • B(e);N_GUARD::B(G),XB(e)
    • S(a);S_CUTQ(b)::QAB1(B)
  • Tries
    • Try
      • R(C);
      • Threat
        • R1(C)
      • Vars
        • B(e);N_GUARD::B(G),XB(e)
      • Refutation
        • Q(b);
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • S(d);XS(D)::QAR1(B)
        • Q(b);N_GUARD,P_PINQ(B)::QAB1(B),XQ(b)
        • Q(b);::QAR1(B)
      • Refutation
        • R(h);P_PINQ(B)
  • Actual
    • Q(B);
    • Threat
      • DUALS(5)
    • Vars
      • Q(b);CHECK::QAR(B)+B(G)
      • R(h);CHECK,SBLOCK::QAR(B)+B(G)
      • K(g);0-0,CHECK,OGATEB::R(C)+B(E)
      • K(g);P-FLIGHT::QAR(B)+B(G)
      • S(d);XS(D)::QAR(B)+B(G)
      • Q(b);::QAR(B)+B(G),DCHECK
      • B(e);::QAR(B)+B(G),DCHECK
      • B(e);::QAR(B)+B(G),DCHECK,XB(e)
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