MESON Chess Problem Database

Problem Display
PID: 81366 (1Q3RN1/8/7b/3nB3/3Pk3/5R2/3P4/1NK5 w - - 0 1)

Macleod, Norman Alasdair

The Chessboard Adventures of Norman Macleod, 1996

1Q3RN1/8/7b/3nB3/3Pk3/5R2/3P4/1NK5

#2

9 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd2+
      • 2.Sxd2#
    • 1...Bg7
      • 2.d3#
    • 1...Sc3
      • 2.Sxc3#
    • 1...Sb4
      • 2.Sc3#
    • 1...Sb6
      • 2.Sc3#
    • 1...Sc7
      • 2.Sc3#
    • 1...Se7
      • 2.Sc3#
  • Tries
    • 1.Qb7?
      • threat
        • 2.Sc3#
        • 2.Qh7#
      • 1...Bxd2+
        • 2.Sxd2#
      • 1...Be3
        • 2.Rxe3#
        • 2.Qh7#
      • 1...Bf4
        • 2.R8xf4#
      • 1...Bg7
        • 2.Sc3#
        • 2.Re3#
        • 2.R8f4#
        • 2.d3#
      • 1...Bxf8!
    • 1.Qa8?
      • threat
        • 2.Sc3#
      • 1...Bxd2+
        • 2.Sxd2#
      • 1...Be3
        • 2.Rxe3#
      • 1...Bf4
        • 2.R8xf4#
      • 1...Bxf8!
  • Keys
    • 1.Qb3!
      • threat
        • 2.Qc2#
        • 2.Qd3#
      • 1...Bxd2+
        • 2.Sxd2#
      • 1...Bxf8
        • 2.Qd3#
      • 1...Be3
        • 2.Qc2#
      • 1...Bf4
        • 2.Qd3#
      • 1...Sc3
        • 2.Sxc3#
      • 1...Se3
        • 2.d3#
      • 1...Sb4
        • 2.Sc3#
        • 2.Sf6#
      • 1...Sf4
        • 2.Re3#
      • 1...Sb6
        • 2.Sc3#
        • 2.Sf6#
      • 1...Sf6
        • 2.Sxf6#
      • 1...Sc7
        • 2.Sc3#
        • 2.Sf6#
      • 1...Se7
        • 2.Sc3#
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 5
  • Sets
    • B(c);CHECK,XP(C)::S(A),XB(c)
    • B(c);N_PINP(C)::P(C)
    • S(b);N_GUARD::S(A),XS(b)
    • S(b);N_GUARD::S(A)
  • Tries
    • Try
      • Q(G);P_PINS(b)
      • Threat
        • DUALS(2)
      • Vars
        • B(c);CHECK,XP(C)::S(A),XB(c)
        • B(c);N_GUARD::R1(H),XB(c)
      • Refutation
        • B(c);N_PINP(C),XR(H)
    • Try
      • Q(G);P_PINS(b)
      • Threat
        • S(A)
      • Vars
        • B(c);CHECK,XP(C)::S(A),XB(c)
        • B(c);N_GUARD::R1(D),XB(c)
        • B(c);N_GUARD::R1(H),XB(c)
      • Refutation
        • B(c);N_PINP(C),XR(H)
  • Actual
    • Q(G);
    • Threat
      • DUALS(2)
    • Vars
      • B(c);CHECK,XP(C)::S(A),XB(c)
      • B(c);N_PINP(C),XR(H)::QAB1(G)
      • B(c);::QAB(G)
      • B(c);::QAB1(G)
      • S(b);N_GUARD::S(A),XS(b)
      • S(b);N_PINP(C)::P(C)
      • S(b);N_GUARD,N_PINP(C),S_CUTB(c)::R1(D)
      • S(b);N_GUARD::S(I),XS(b)
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