MESON Chess Problem Database

Problem Display
PID: 11257 (6b1/3BQ3/n2P1r2/K1k5/8/4N3/3R1B1q/8 w - - 0 1)

Koldijk, Albert Marinus

Limburgs Dagblad, 1937

6b1/3BQ3/n2P1r2/K1k5/8/4N3/3R1B1q/8

#2

7 + 5

3098 FIDE Album (1914-1944) (I) 1971
721 Variantim 1990
3310 2345 Chess Problems 1997
102 Probleemblad 2005

SOLUTION

  • SOUND
  • Sets
    • 1...Re6
      • 2.Rd5#
    • 1...Rf7
      • 2.Rd5#
    • 1...Bd5
      • 2.Rxd5#
    • 1...Bh7
      • 2.Rd5#
  • Tries
    • 1.Rc2+?
      • 1...Bc4
        • 2.Rxc4#
      • 1...Kd4!
    • 1.Qe5+?
      • 1...Bd5
        • 2.Rc2#
        • 2.Rxd5#
        • 2.Qxd5#
      • 1...Qxe5!
  • Keys
    • 1.Bb5!
      • threat
        • 2.Qa7#
      • 1...Qxd6
        • 2.Sf5#
      • 1...Rxd6
        • 2.Sg2#
      • 1...Qh7
        • 2.Sf5#
      • 1...Rf7
        • 2.Rd5#
      • 1...Bd5
        • 2.Rxd5#
      • 1...Sc7
        • 2.Qxc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • R(d);S_CUTB(e)::R1(A)
    • B(e);N_GUARD::R1(A),XB(e)
    • B(e);N_GUARD::R1(A)
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • B(e);N_GUARD,P_SPINB(e)::R1(A),XB(e)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(G);CHECK
      • Refutation
        • Q(a);XQ(G)
  • Actual
    • B(F);
    • Threat
      • QAB(G)
    • Vars
      • Q(a);N_GUARD,P_SPINQ(a),XP(E)::B(B)+S(C)
      • R(d);N_GUARD,P_SPINR(d),XP(E)::B(B)+S(C)
      • Q(a);N_GUARD::B(B)+S(C)
      • R(d);S_CUTB(e)::R1(A)
      • B(e);N_GUARD::R1(A),XB(e)
      • S(c);N_GUARD::QAR2(G),XS(c)
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