MESON Chess Problem Database

Problem Display
PID: 18233 (2BB1n2/3q4/R4Pp1/2Npk3/p2pN1p1/K2p2P1/b2P4/5R2 w - - 0 1)

le Grand, Henk

le Grand, Piet

2nd Comm., Onesimus, 1954

2BB1n2/3q4/R4Pp1/2Npk3/p2pN1p1/K2p2P1/b2P4/5R2

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qb5
      • 2.Bc7#
    • 1...Qf5
      • 2.Bc7#
    • 1...Qe8
      • 2.Bc7#
    • 1...Qc7
      • 2.Bxc7#
  • Tries
    • 1.Sxd7+?
      • 1...Kxe4
        • 2.Rf4#
      • 1...Sxd7!
    • 1.Bxd7?
      • threat
        • 2.Bc7#
      • 1...Se6
        • 2.Rxe6#
      • 1...dxe4!
    • 1.Bc7+?
      • 1...Qd6
        • 2.Bxd6#
      • 1...Qxc7!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Re1#
      • 1...Qxd8
        • 2.Sxd3#
        • 2.Sf7#
      • 1...Qc6
        • 2.Sf7#
      • 1...Qf5
        • 2.Sf7#
      • 1...Qe7
        • 2.Sxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • Q(i);N_GUARD::B(J)
    • Q(i);N_GUARD::B(J),XQ(i)
  • Tries
    • Try
      • S(F);CHECK,XQ(i)
      • Vars
        • K(g);P-FLIGHT,XS(E)::R1(A)
      • Refutation
        • S(j);XS(F)
    • Try
      • B(I);XQ(i)
      • Threat
        • B(J)
      • Vars
        • S(j);N_GUARD::R1(G),XS(j)
      • Refutation
        • P(f);XS(E)
    • Try
      • B(J);CHECK
      • Vars
        • Q(i);N_GUARD,P_PINS(F),P_SPINQ(i)::B(J),XQ(i)
      • Refutation
        • Q(i);XB(J)
  • Actual
    • S(E);
    • Threat
      • R(A)
    • Vars
      • Q(i);N_GUARD::S(E)
      • Q(i);::S(F),XP(b)
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