MESON Chess Problem Database

Problem Display
PID: 277215 (6K1/3P1BB1/2p1n2R/3q3Q/1PkpRnp1/P1N5/1PP5/8 w - - 0 1)

le Grand, Henk

le Grand, Piet

Probleemblad, 1954

6K1/3P1BB1/2p1n2R/3q3Q/1PkpRnp1/P1N5/1PP5/8

#2

12 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe4
      • 2.Qc5#
    • 1...Qa5
      • 2.Rxd4#
    • 1...Qb5
      • 2.Rxd4#
    • 1...Qc5
      • 2.Qxc5#
    • 1...Qf5
      • 2.Rxd4#
    • 1...Qg5
      • 2.Rxd4#
    • 1...Qxh5
      • 2.Rxd4#
    • 1...Qxd7
      • 2.Qc5#
    • 1...Sc5
      • 2.Rxd4#
    • 1...Sg5
      • 2.Rxd4#
      • 2.Rxc6#
    • 1...Sc7
      • 2.Rxd4#
      • 2.Rxc6#
    • 1...Sxg7
      • 2.Rxc6#
    • 1...Sd8
      • 2.Rxd4#
    • 1...Sf8
      • 2.Rxd4#
      • 2.Rxc6#
  • Keys
    • 1.Bxd4!
      • threat
        • 2.b3#
      • 1...Qg5+
        • 2.Bg7#
      • 1...Qxe4
        • 2.Qc5#
      • 1...Qxd4
        • 2.Qc5#
      • 1...Sxd4
        • 2.Rxc6#
      • 1...Sc5
        • 2.Bxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • Q(e);N_SPINP(b),OGATE,P_SPINS(g),XR(F)::QAR1(G)
    • Q(e);N_GUARD,P_SPINS(g)::R1(F),XP(b)
    • Q(e);OGATE,P_SPINS(g)::QAR1(G),XQ(e)
    • Q(e);N_GUARD,P_PINB(K),P_SPINS(g)::R1(F),XP(b)
    • Q(e);N_GUARD,P_SPINS(g),XQ(G)::R1(F),XP(b)
    • Q(e);OGATE,P_SPINS(g),XP(I)::QAR1(G)
    • S(g);N_GUARD,P_PINB(J),P_SPINQ(e)::R1(F),XP(b)
    • S(g);OGATE,P_PINB(J),P_SPINQ(e),XB(K)::R(H),XP(f)
  • Actual
    • B(K);XP(b)
    • Threat
      • P(A)
    • Vars
      • Q(e);CHECK,N_GUARD,P_SPINS(g)::R(F)+B(K)
      • Q(e);OGATE,P_SPINS(g),XR(F)::QAR1(G)
      • Q(e);OGATE,P_SPINQ(e),P_SPINS(g),XB(K)::QAR1(G)
      • S(g);OGATE,P_PINB(J),P_SPINQ(e),P_SPINS(g),XB(K)::R(H),XP(f)
      • S(g);N_GUARD,P_PINB(J),P_SPINQ(e)::R(F)+B(K),XS(g)
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