MESON Chess Problem Database

Problem Display
PID: 154515 (8/2p2R2/Q7/5b2/2P1k2K/3NpNp1/2r1n3/5B2 w - - 0 1)

McWilliam, Robert C

The Problemist, 1984

8/2p2R2/Q7/5b2/2P1k2K/3NpNp1/2r1n3/5B2

#2

7 + 7

15393 McWilliam Scrapbook 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Kxf3
      • 2.Qc6#
    • 1...Bh3
      • 2.Sc5#
    • 1...Bg4
      • 2.Sc5#
    • 1...Be6
      • 2.Sc5#
    • 1...Bg6
      • 2.Sc5#
      • 2.Qxg6#
    • 1...Bd7
      • 2.Sc5#
    • 1...Bh7
      • 2.Sc5#
    • 1...Bc8
      • 2.Sc5#
    • 1...Sc1
      • 2.Qc6#
    • 1...Sg1
      • 2.Qc6#
    • 1...Sd4
      • 2.Sg5#
  • Tries
    • 1.Bxe2?
      • threat
        • 2.Qc6#
      • 1...Rxc4
        • 2.Qxc4#
      • 1...Be6
        • 2.Sc5#
        • 2.Rf4#
        • 2.Qxe6#
      • 1...Bd7
        • 2.Sc5#
        • 2.Rf4#
      • 1...c6
        • 2.Qxc6#
      • 1...Rxe2!
    • 1.Qd6?
      • threat
        • 2.Sg5#
        • 2.Qd5#
      • 1...Kxf3
        • 2.Qd5#
        • 2.Qc6#
      • 1...Rxc4
        • 2.Sg5#
      • 1...Sf4
        • 2.Sg5#
        • 2.Qxf4#
      • 1...Be6
        • 2.Sc5#
        • 2.Sg5#
      • 1...Sc3
        • 2.Sg5#
        • 2.Qf4#
      • 1...c6
        • 2.Sg5#
      • 1...cxd6!
    • 1.Qe6+?
      • 1...Kxf3
        • 2.Qd5#
        • 2.Qc6#
      • 1...Bxe6
        • 2.Sc5#
      • 1...Kxd3!
  • Keys
    • 1.Qf6!
      • threat
        • 2.Qxf5#
      • 1...Kxd3
        • 2.Qd4#
      • 1...Kxf3
        • 2.Qc6#
      • 1...Sf4
        • 2.Sg5#
      • 1...Bh3
        • 2.Sc5#
      • 1...Bg4
        • 2.Sc5#
      • 1...Be6
        • 2.Sc5#
      • 1...Bg6
        • 2.Sc5#
        • 2.Qxg6#
      • 1...Bd7
        • 2.Sc5#
      • 1...Bh7
        • 2.Sc5#
      • 1...Bc8
        • 2.Sc5#
      • 1...Sd4
        • 2.Sg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • K(e);P_SPINB(f),S_FLIGHT,XS(C)::QAB(F)
    • B(f);::S(B)
    • S(b);::QAB(F)
    • S(b);SBLOCK::S(C)
  • Tries
    • Try
      • B(A);XS(b)
      • Threat
        • QAB(F)
      • Vars
        • R(a);OGATE,XP(D)::QAR2(F),XR(a)
        • P(g);::QAB(F),XP(g)
      • Refutation
        • R(a);XB(A)
    • Try
      • Q(F);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);XP(D)::S(C)
        • P(g);::S(C)
      • Refutation
        • P(g);XQ(F)
    • Try
      • Q(F);CHECK
      • Vars
        • B(f);XQ(F)::S(B)
      • Refutation
        • K(e);P_SPINS(b),S_FLIGHT,XS(B)
  • Actual
    • Q(F);
    • Threat
      • QAB1(F),XB(f)
    • Vars
      • K(e);P_SPINS(b),S_FLIGHT,XS(B)::QAR1(F)
      • K(e);P_SPINB(f),S_FLIGHT,XS(C)::QAB(F)
      • S(b);::S(C)
      • B(f);::S(B)
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