MESON Chess Problem Database

Problem Display
PID: 60948 (3Nk2r/7p/8/n3N1B1/2b5/5Q2/5K2/6R1 w k - 0 1)

McIntyre, Donald Glenoe

South African Chess Magazine, 1946

3Nk2r/7p/8/n3N1B1/2b5/5Q2/5K2/6R1

#2

6 + 5

5639 Some Problems For My Friends 1957

SOLUTION

  • SOUND
  • Sets
    • 1...Bf1
      • 2.Qf7#
    • 1...Be2
      • 2.Qf7#
    • 1...Bd3
      • 2.Qf7#
    • 1...Bb5
      • 2.Qf7#
    • 1...Ba6
      • 2.Qf7#
    • 1...Bf7
      • 2.Qxf7#
  • Tries
    • 1.Se6?
      • threat
        • 2.Sc7#
        • 2.Sg7#
        • 2.Qh5#
        • 2.Qa8#
        • 2.Qf7#
      • 1...Rf8
        • 2.Sc7#
        • 2.Sg7#
        • 2.Qxf8#
      • 1...Rg8
        • 2.Sc7#
        • 2.Qa8#
        • 2.Qf7#
      • 1...Be2
        • 2.Sc7#
        • 2.Sg7#
        • 2.Qa8#
        • 2.Qf7#
      • 1...Bd3
        • 2.Sc7#
        • 2.Sg7#
        • 2.Qa8#
        • 2.Qf7#
      • 1...Bd5
        • 2.Sc7#
        • 2.Sg7#
        • 2.Qh5#
        • 2.Qf7#
      • 1...Ba6
        • 2.Sc7#
        • 2.Sg7#
        • 2.Qh5#
        • 2.Qf7#
      • 1...Sc6
        • 2.Sc7#
        • 2.Sg7#
        • 2.Qh5#
        • 2.Qxc6#
        • 2.Qf7#
      • 1...Sb7
        • 2.Sc7#
        • 2.Sg7#
        • 2.Qh5#
        • 2.Qc6#
        • 2.Qf7#
      • 1...h5
        • 2.Sc7#
        • 2.Sg7#
        • 2.Qa8#
        • 2.Qf7#
      • 1...Bxe6!
    • 1.Sb7?
      • threat
        • 2.Sd6#
      • 1...Bf7
        • 2.Qxf7#
      • 1...Sxb7!
    • 1.Qh5+?
      • 1...Bf7
        • 2.Qxf7#
      • 1...Kf8!
  • Keys
    • 1.Qa8!
      • threat
        • 2.Sdc6#
        • 2.Se6#
        • 2.Sb7#
        • 2.Sdf7#
      • 1...Rf8+
        • 2.Sdf7#
      • 1...0-0+
        • 2.Bf6#
      • 1...Kf8
        • 2.Se6#
      • 1...Bd5
        • 2.Sdc6#
        • 2.Sb7#
      • 1...Ba6
        • 2.Sb7#
      • 1...Be6
        • 2.Sxe6#
      • 1...Bf7
        • 2.Sdc6#
        • 2.Se6#
        • 2.Sb7#
        • 2.Sdxf7#
      • 1...Sc6
        • 2.Sdxc6#
      • 1...Sb7
        • 2.Sxb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 5
  • Sets
    • B(a);N_GUARD::QAB1(C)
    • B(a);N_GUARD::QAB1(C),XB(a)
  • Tries
    • Try
      • S(F);
      • Threat
        • DUALS(5)
      • Refutation
        • B(a);XS(F)
    • Try
      • S(F);
      • Threat
        • S(F)
      • Vars
        • B(a);N_GUARD::QAB1(C),XB(a)
      • Refutation
        • S(b);XS(F)
    • Try
      • Q(C);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAB1(C),XB(a)
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • Q(C);
    • Threat
      • DUALS(4)
    • Vars
      • R(e);CHECK,SBLOCK::QAR(C)+S(F)
      • K(d);0-0,CHECK,OGATEB::R(A)+B(E)
      • K(d);P-FLIGHT::QAR(C)+S(F),DCHECK
      • B(a);::QAR(C)+S(F)
      • B(a);::QAR(C)+S(F),XB(a)
      • S(b);::QAR(C)+S(F),XS(b)
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