MESON Chess Problem Database

Problem Display
PID: 18650 (8/1np5/R1R5/1k2K3/1P6/2Q5/4b3/8 w - - 0 1)

van Dijk, Nils Gustav Gerard

3rd Prize, Il Due Mosse, 1957

8/1np5/R1R5/1k2K3/1P6/2Q5/4b3/8

#2

5 + 4

3976 FIDE Album (1956-1958) 1961
3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Bd1
      • 2.Qc4#
    • 1...Bf3
      • 2.Qc4#
    • 1...Bc4
      • 2.Qxc4#
    • 1...Bg4
      • 2.Qc4#
    • 1...Bh5
      • 2.Qc4#
    • 1...Sa5
      • 2.Rxa5#
    • 1...Sc5
      • 2.Qxc5#
    • 1...Sd6
      • 2.Ra5#
      • 2.Qc5#
    • 1...Sd8
      • 2.Ra5#
      • 2.Qc5#
  • Tries
    • 1.Qc2?
      • threat
        • 2.Qa4#
      • 1...Kxb4
        • 2.Qb1#
        • 2.Qa4#
        • 2.Qb2#
      • 1...Bd1
        • 2.Qc4#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Sa5!
    • 1.Qa3?
      • threat
        • 2.Qa4#
      • 1...Sc5
        • 2.Rxc5#
      • 1...Sa5
        • 2.Qxa5#
      • 1...Bd1!
    • 1.Qd3+?
      • 1...Kxb4
        • 2.Qb1#
      • 1...Bxd3!
  • Keys
    • 1.Qb3!
      • threat
        • 2.Qa4#
      • 1...Bd1
        • 2.Qc4#
      • 1...Sa5
        • 2.bxa5#
      • 1...Sc5
        • 2.bxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 4
  • Sets
    • B(a);N_GUARD::QAB1(A)
    • B(a);N_GUARD::QAB1(A),XB(a)
    • S(c);N_GUARD::R1(D),XS(c)
    • S(c);N_GUARD::QAR1(A),XS(c)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • B(a);N_GUARD::QAB1(A)
        • S(c);N_GUARD::QAR1(A),XS(c)
      • Refutation
        • S(c);
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • S(c);N_GUARD::R1(E),XS(c)
        • S(c);N_GUARD::QAR1(A),XS(c)
      • Refutation
        • B(a);
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATEB,P-FLIGHT,XP(B)::QAR(A)
      • Refutation
        • B(a);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • B(a);N_GUARD::QAB1(A)
      • S(c);OGATE::QAR(A)+P(B),XS(c)
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