MESON Chess Problem Database

Problem Display
PID: 60874 (8/8/8/8/4Nb2/3r4/4pp1p/2Q1nk1K w - - 0 1)

Koldijk, Albert Marinus

Soldatenblaadje De Watervlo, 1940

8/8/8/8/4Nb2/3r4/4pp1p/2Q1nk1K

#2

3 + 7

5227 Schaak..., maar raak! 1969

SOLUTION

  • SOUND
  • Sets
    • 1...Re3
      • 2.Sd2#
    • 1...Be3
      • 2.Sg3#
  • Tries
    • 1.Qxf4?
      • threat
        • 2.Qxf2#
      • 1...Rf3
        • 2.Sd2#
      • 1...Sf3!
  • Keys
    • 1.Qe3!
      • threat
        • 2.Qxf2#
      • 1...Rxe3
        • 2.Sd2#
      • 1...Bxe3
        • 2.Sg3#
      • 1...Bg3
        • 2.Sxg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(f);N_GUARD,S_CUTB(g)::S(C)
    • B(g);N_GUARD,S_CUTR(f)::S(C)
  • Tries
    • Try
      • Q(A);N_PINS(a),P_PINP(d),XB(g)
      • Threat
        • QAR1(A),XP(d)
      • Vars
        • R(f);N_GUARD,N_SPINP(d)::S(C)
      • Refutation
        • S(a);N_SPINP(d)
  • Actual
    • Q(A);N_PINS(a)
    • Threat
      • QAR1(A),XP(d)
    • Vars
      • R(f);N_GUARD,XQ(A)::S(C)
      • B(g);N_GUARD,XQ(A)::S(C)
      • B(g);N_GUARD::S(C),XB(g)
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