MESON Chess Problem Database

Problem Display
PID: 63953 (4B3/K3N3/2p3pq/1NB1p2p/pR1pkP2/3p3Q/1r6/n1r5 w - - 0 1)

le Grand, Henk

4th Prize, Probleemblad, 1979

4B3/K3N3/2p3pq/1NB1p2p/pR1pkP2/3p3Q/1r6/n1r5

#2

8 + 12

3750 FIDE Album (1977-1979) 1984

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf4
      • 2.Sd6#
      • 2.Bxc6#
  • Tries
    • 1.Bxd4?
      • threat
        • 2.Qe3#
      • 1...Kxf4
        • 2.Be3#
      • 1...Qxf4
        • 2.Sd6#
      • 1...exd4
        • 2.Rxd4#
      • 1...exf4
        • 2.Sd6#
      • 1...Re1
        • 2.Bxb2#
      • 1...Re2
        • 2.Bc3#
      • 1...Sc2!
  • Keys
    • 1.Sxd4!
      • threat
        • 2.Qf3#
      • 1...Kxf4
        • 2.Se6#
      • 1...Qxf4
        • 2.Bxc6#
      • 1...exd4
        • 2.Rxd4#
      • 1...exf4
        • 2.Qe6#
      • 1...Rf1
        • 2.Sb3#
      • 1...Rf2
        • 2.Sc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(E);XP(f)
      • Threat
        • QAR1(A)
      • Vars
        • K(g);P-FLIGHT,XP(C)::R(B)+B(E),DCHECK
        • Q(l);SBLOCK,XP(C)::S(D)
        • P(h);OGATE,P_SPINP(h),XB(E)::R1(B),XP(h)
        • P(h);SBLOCK,XP(C)::S(D)
        • R(b);N_GUARD::R(B)+B(E),XR(c)
        • R(c);N_GUARD::R(B)+B(E)
      • Refutation
        • S(a);
  • Actual
    • S(D);XP(f)
    • Threat
      • QAB1(A)
    • Vars
      • K(g);P-FLIGHT,XP(C)::R(B)+S(D),DCHECK
      • Q(l);SBLOCK,XP(C)::B(H),XP(j)
      • P(h);OGATE,P_SPINP(h),XS(D)::R1(B),XP(h)
      • P(h);OGATEB,SBLOCK,XP(C)::QAR2(A)
      • R(b);N_GUARD::R(B)+S(D)
      • R(c);N_GUARD::R(B)+S(D)
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