MESON Chess Problem Database

Problem Display
PID: 147306 (4n1b1/2N4p/2pPP2B/6Kp/1PpkP1R1/R7/4B2Q/3n2Nq w - - 0 1)

Saunders, Denis M

British Chess Magazine, 1983

4n1b1/2N4p/2pPP2B/6Kp/1PpkP1R1/R7/4B2Q/3n2Nq

#2

12 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qf3
      • 2.Sxf3#
    • 1...Qxe4
      • 2.Sf3#
    • 1...Qxh2
      • 2.Sf3#
    • 1...Bxe6
      • 2.Sxe6#
    • 1...Sxd6
      • 2.Bg7#
      • 2.Qxd6#
    • 1...Sxc7
      • 2.Bg7#
    • 1...Sg7
      • 2.Bxg7#
    • 1...c5
      • 2.Sb5#
  • Tries
    • 1.Bg7+?
      • 1...Sf6
        • 2.Bxf6#
      • 1...Sxg7!
    • 1.e5+?
      • 1...Qe4
        • 2.Sf3#
      • 1...hxg4!
  • Keys
    • 1.Kf5!
      • threat
        • 2.Qe5#
      • 1...Qf3+
        • 2.Sxf3#
      • 1...Qxe4+
        • 2.Rxe4#
      • 1...Bxe6+
        • 2.Sxe6#
      • 1...Se3+
        • 2.Bxe3#
      • 1...Sxd6+
        • 2.Qxd6#
      • 1...Sg7+
        • 2.Bxg7#
      • 1...Qxh2
        • 2.Sf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • Q(b);N_GUARD::S(A),XQ(b)
    • Q(b);N_GUARD,P_SPINQ(b),XP(F)::S(A)
    • Q(b);N_GUARD,XQ(C)::S(A)
    • B(i);XP(J)::S(L),XB(i)
    • S(h);N_GUARD,XS(L)::B(K)
    • S(h);N_GUARD::B(K),XS(h)
    • P(f);N_GUARD::S(L)
  • Tries
    • Try
      • B(K);CHECK
      • Vars
        • S(h);N_GUARD,P_SPINS(h)::B(K),XS(h)
      • Refutation
        • S(h);XB(K)
    • Try
      • P(F);CHECK
      • Vars
        • Q(b);P_SPINQ(b)::S(A)
      • Refutation
        • P(e);XR(G)
  • Actual
    • K(H);P-FLIGHT
    • Threat
      • QAB1(C)
    • Vars
      • Q(b);CHECK,N_GUARD::S(A),XQ(b)
      • Q(b);CHECK,OGATE,P_SPINQ(b),XP(F)::R1(G),XQ(b)
      • B(i);CHECK,XP(J)::S(L),XB(i)
      • S(a);CHECK,N_GUARD::B(K),XS(a)
      • S(h);CHECK,OGATE,XP(I)::QAR2(C),XS(h)
      • S(h);CHECK,N_GUARD::B(K),XS(h)
      • Q(b);N_GUARD,XQ(C)::S(A)
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