MESON Chess Problem Database

Problem Display
PID: 199721 (3b1R2/7q/2N2pp1/1b1P1kP1/3BpNpP/4P1pr/p6r/K4R2 w - - 0 1)

le Grand, Johan B

le Grand, Piet

The Problemist, 1982

3b1R2/7q/2N2pp1/1b1P1kP1/3BpNpP/4P1pr/p6r/K4R2

#2

10 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Rb2
      • 2.Se2#
    • 1...Rc2
      • 2.Se2#
    • 1...Rd2
      • 2.Se2#
    • 1...Re2
      • 2.Sxe2#
    • 1...Ba4
      • 2.Sg2#
    • 1...Bxc6
      • 2.Sg2#
    • 1...Ba5
      • 2.Rxf6#
    • 1...Bb6
      • 2.Rxf6#
    • 1...Bc7
      • 2.Rxf6#
  • Keys
    • 1.Bxf6!
      • threat
        • 2.Sd4#
      • 1...Bxf6+
        • 2.Rxf6#
      • 1...Bxc6
        • 2.Sg2#
      • 1...Qa7
        • 2.Be7#
      • 1...Rd2
        • 2.Se2#
      • 1...Bb6
        • 2.Bg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • R(b);N_GUARD::R(B)+S(E)
    • R(b);N_GUARD::R(B)+S(E),XR(b)
    • B(g);N_GUARD::R(B)+S(E)
    • B(g);N_GUARD,XS(I)::R(B)+S(E)
    • B(l);N_GUARD::R1(J),XP(i)
  • Actual
    • B(D);XP(i)
    • Threat
      • S(I)
    • Vars
      • B(l);CHECK,OGATE,P_SPINB(l),XB(D)::R1(J),XB(l)
      • B(g);N_GUARD,XS(I)::R(B)+S(E)
      • Q(k);N_GUARD::R(J)+B(D)
      • R(b);N_GUARD::R(B)+S(E)
      • B(l);N_GUARD::R(J)+B(D)
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