MESON Chess Problem Database

Problem Display
PID: 66291 (2RN4/n4n1r/3p2N1/1p1k4/3p4/8/8/KBQ4b w - - 0 1)

Mackenzie, Arthur Ford

2nd Prize, Leamington Chronicle, 1889

2RN4/n4n1r/3p2N1/1p1k4/3p4/8/8/KBQ4b

#2

6 + 8

15 British Chess Magazine 1889

SOLUTION

  • SOUND
  • Sets
    • 1...Rg7
      • 2.Qxh1#
    • 1...Be4
      • 2.Ba2#
    • 1...Sc6
      • 2.Qxc6#
    • 1...Sxc8
      • 2.Qc6#
    • 1...Se5
      • 2.Sf4#
    • 1...Sg5
      • 2.Qxg5#
    • 1...Sh6
      • 2.Qxh1#
    • 1...Sh8
      • 2.Qg5#
    • 1...b4
      • 2.Qc4#
  • Tries
    • 1.Qg5+?
      • 1...Se5
        • 2.Sf4#
      • 1...Sxg5!
    • 1.Qc2?
      • threat
        • 2.Ba2#
        • 2.Qb3#
        • 2.Qa2#
      • 1...Sxc8
        • 2.Ba2#
        • 2.Qc6#
      • 1...d3
        • 2.Qxd3#
      • 1...Rh2
        • 2.Ba2#
        • 2.Qb3#
      • 1...Sc6
        • 2.Ba2#
        • 2.Qxc6#
      • 1...Se5
        • 2.Sf4#
      • 1...b4
        • 2.Qb3#
        • 2.Qc4#
      • 1...Rh3!
  • Keys
    • 1.Qf1!
      • 1...Sxc8
        • 2.Qxb5#
      • 1...Sxd8
        • 2.Qf5#
      • 1...Sc6
        • 2.Qxb5#
      • 1...d3
        • 2.Qxd3#
      • 1...Rh2
        • 2.Qxf7#
      • 1...Rh3
        • 2.Qxf7#
      • 1...Rh4
        • 2.Qxf7#
      • 1...Rh5
        • 2.Qxf7#
      • 1...Rh6
        • 2.Qxf7#
      • 1...Rg7
        • 2.Qxh1#
      • 1...Rh8
        • 2.Qxf7#
      • 1...Bg2
        • 2.Qxg2#
      • 1...Bf3
        • 2.Qxf3#
      • 1...Be4
        • 2.Ba2#
      • 1...Se5
        • 2.Sf4#
      • 1...Sg5
        • 2.Qf5#
      • 1...Sh6
        • 2.Qxh1#
      • 1...Sh8
        • 2.Qf5#
      • 1...b4
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 4
    • ADDED MATES = 10
    • REMOVED MATES = 0
  • Sets
    • R(h);N_GUARD::QAB(C),XB(a)
    • B(a);SBLOCK::B(B)
    • S(f);N_GUARD::QAB1(C),XS(f)
    • S(f);N_GUARD,XR(E)::QAB1(C)
    • S(g);SBLOCK::S(D)
    • S(g);N_GUARD::QAR(C),XS(g)
    • S(g);S_CUTR(h)::QAB(C),XB(a)
    • S(g);N_GUARD::QAR(C)
    • P(c);N_GUARD::QAB1(C)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • S(g);P_SPINS(g)::S(D)
      • Refutation
        • S(g);XQ(C)
    • Try
      • Q(C);
      • Threat
        • DUALS(3)
      • Vars
        • P(b);OGATEB::QAR2(C),XP(b)
        • S(g);SBLOCK::S(D)
      • Refutation
        • R(h);
  • Actual
    • Q(C);
    • Vars
      • S(f);N_GUARD,XR(E)::QAR2(C),XP(c)
      • S(g);N_GUARD,XS(F)::QAR2(C)
      • S(f);N_GUARD::QAR2(C),XP(c)
      • P(b);OGATEB::QAR2(C),XP(b)
      • R(h);N_GUARD::QAB(C),XS(g)
      • R(h);N_GUARD::QAB(C),XB(a)
      • B(a);N_GUARD::QAB(C),XB(a)
      • B(a);SBLOCK::B(B)
      • S(g);SBLOCK::S(D)
      • S(g);N_GUARD::QAR2(C)
      • S(g);S_CUTR(h)::QAB(C),XB(a)
      • P(c);N_GUARD::QAB1(C)
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