MESON Chess Problem Database

Problem Display
PID: 81288 (KbB3R1/1p6/p1n3Np/6pk/4N1p1/1r3Rp1/1q1p4/3Q1r1b w - - 0 1)

Macleod, Norman Alasdair

Shakhmaty v SSSR, 1962

KbB3R1/1p6/p1n3Np/6pk/4N1p1/1r3Rp1/1q1p4/3Q1r1b

#2

7 + 14

6455 The Chessboard Adventures of Norman Macleod 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Qc1
      • 2.Sf6#
    • 1...Qa3
      • 2.Sf6#
    • 1...Qf6
      • 2.Sxf6#
    • 1...Qb1
      • 2.Sf6#
    • 1...Qa2
      • 2.Sf6#
    • 1...Qc2
      • 2.Sf6#
    • 1...Rfxf3
      • 2.Qxh1#
    • 1...Rc3
      • 2.Sf6#
    • 1...Ba7
      • 2.Sxg3#
    • 1...Sd4
      • 2.Sf6#
    • 1...Se5
      • 2.Sxg3#
      • 2.Sf6#
  • Tries
    • 1.Rf4?
      • threat
        • 2.Bxg4#
        • 2.Qxg4#
      • 1...Rxd1
        • 2.Bxg4#
      • 1...Rxf4
        • 2.Qxh1#
      • 1...Rff3
        • 2.Bxg4#
        • 2.Qxh1#
      • 1...Rbf3
        • 2.Bxg4#
      • 1...Bf3
        • 2.Sxg3#
      • 1...Se5
        • 2.Sf6#
      • 1...Qg7!
  • Keys
    • 1.Rc3!
      • threat
        • 2.Bxg4#
        • 2.Qxg4#
      • 1...Rxd1
        • 2.Sf6#
      • 1...Rf3
        • 2.Qxh1#
      • 1...Rf4
        • 2.Sxg3#
        • 2.Qxh1#
      • 1...Rf5
        • 2.Qxh1#
      • 1...Bf3
        • 2.Sf6#
      • 1...Se5
        • 2.Sxg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 9
  • Sets
    • Q(c);N_GUARD::S(C)
    • Q(c);N_GUARD::S(C),XQ(c)
    • R(a);OGATE,XR(B)::QAR(A),XB(b)
    • R(e);S_CUTQ(c)::S(C)
    • B(n);N_GUARD::S(C),XP(f)
    • S(k);S_CUTQ(c)::S(C)
  • Tries
    • Try
      • R(B);P_PINP(g)
      • Threat
        • DUALS(2)
      • Vars
        • R(a);N_SPINP(g),XQ(A)::B(F),XP(g)
        • R(a);OGATE,XR(B)::QAR(A),XB(b)
        • R(e);N_SPINP(g)::B(F),XP(g)
        • B(b);N_SPINP(g),S_CUTR(e)::S(C),XP(f)
        • S(k);S_CUTQ(c)::S(C)
      • Refutation
        • Q(c);
  • Actual
    • R(B);P_PINP(g)
    • Threat
      • DUALS(2)
    • Vars
      • R(a);N_GUARD,N_SPINP(g),XQ(A)::S(C)
      • R(a);N_SPINP(g),OGATE::QAR(A),XB(b)
      • R(a);OGATE::QAR(A),XB(b)
      • B(b);N_SPINP(g),S_CUTR(a)::S(C)
      • S(k);S_CUTB(n)::S(C),XP(f)
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