MESON Chess Problem Database

Problem Display
PID: 158728 (1B3Q2/5P2/2P3P1/4N1p1/6B1/2R1P1k1/R3r1N1/5n1K w - - 0 1)

Macleod, Norman Alasdair

Phenix, 1988

1B3Q2/5P2/2P3P1/4N1p1/6B1/2R1P1k1/R3r1N1/5n1K

#2

12 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Kf2
      • 2.Sd3#
  • Tries
    • 1.Sc4+?
      • 1...Kf2
        • 2.Rxe2#
      • 1...Kxg4!
    • 1.Sd7+?
      • 1...Kf2
        • 2.Rxe2#
      • 1...Kxg4!
    • 1.Qc8?
      • threat
        • 2.Sd3#
      • 1...Kf2
        • 2.Sd3#
      • 1...Rxg2
        • 2.Sf3#
      • 1...Rxe3
        • 2.Sc4#
      • 1...Rf2
        • 2.Sf3#
      • 1...Rb2!
  • Keys
    • 1.Qb4!
      • threat
        • 2.Sd3#
      • 1...Kf2
        • 2.Sd3#
      • 1...Rxg2
        • 2.Sf3#
      • 1...Rxe3
        • 2.Sd7#
      • 1...Rf2
        • 2.Sf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(c);P_SPINR(b),S_FLIGHT::S(G)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(c);P_SPINR(b),S_FLIGHT::R1(B),XR(b)
      • Refutation
        • K(c);P-FLIGHT,XB(F)
    • Try
      • S(G);CHECK
      • Vars
        • K(c);P_SPINR(b),S_FLIGHT::R1(B),XR(b)
      • Refutation
        • K(c);P-FLIGHT,XB(F)
    • Try
      • Q(L);
      • Threat
        • B(K)+S(G)
      • Vars
        • K(c);P_SPINR(b),S_FLIGHT::S(G)
        • R(b);XS(C)::B(K)+S(G)
        • R(b);P_SPINR(b),XP(E)::B(K)+S(G)
        • R(b);::B(K)+S(G)
      • Refutation
        • R(b);
  • Actual
    • Q(L);
    • Threat
      • B(K)+S(G)
    • Vars
      • K(c);P_SPINR(b),S_FLIGHT::S(G)
      • R(b);XS(C)::B(K)+S(G)
      • R(b);P_SPINR(b),XP(E)::B(K)+S(G)
      • R(b);::B(K)+S(G)
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