MESON Chess Problem Database

Problem Display
PID: 105920 (NB6/p7/K1p1pb2/RN1kqp2/1P6/1p1P4/1R6/Q7 w - - 0 1)

Veders, Visvaldis M

Krusta-mikla, 1937

NB6/p7/K1p1pb2/RN1kqp2/1P6/1p1P4/1R6/Q7

#2

9 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qc3
      • 2.Qh1#
    • 1...Qd4
      • 2.Sc3#
  • Tries
    • 1.Qc1?
      • threat
        • 2.Qc4#
        • 2.Qc5#
      • 1...Qxb8
        • 2.Qc5#
      • 1...Qc7
        • 2.Qc5#
      • 1...c5
        • 2.Qxc5#
      • 1...Qc3
        • 2.Qh1#
      • 1...Qd4
        • 2.Sc3#
      • 1...Qf4
        • 2.Qc5#
      • 1...Qe3
        • 2.Qc4#
      • 1...Qe4
        • 2.Qc5#
      • 1...Be7
        • 2.Qc4#
      • 1...Qd6!
    • 1.Qg1?
      • threat
        • 2.Sc3#
        • 2.Qc5#
      • 1...Qxb8
        • 2.Qc5#
      • 1...cxb5
        • 2.Qc5#
      • 1...Qd6
        • 2.Sc3#
        • 2.Sbc7#
      • 1...Qc7
        • 2.Qc5#
      • 1...c5
        • 2.Qxc5#
      • 1...Qc3
        • 2.Sxc3#
        • 2.Qh1#
        • 2.Qg2#
      • 1...Qd4
        • 2.Sc3#
      • 1...Be7
        • 2.Sc3#
      • 1...Qe3!
  • Keys
    • 1.Rc2!
      • threat
        • 2.Rc5#
      • 1...bxc2
        • 2.Qa2#
      • 1...c5
        • 2.Rxc5#
      • 1...Qc3
        • 2.Qh1#
      • 1...Qd4
        • 2.Sc3#
      • 1...Qd6
        • 2.Sbc7#
      • 1...Qe3
        • 2.Sac7#
      • 1...Be7
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • Q(c);N_GUARD::QAB(A)
    • Q(c);SBLOCK::R(E)+S(F),DCHECK
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);XB(I)::QAR1(A)
        • Q(c);::QAR1(A)
        • P(e);::QAR1(A),XP(e)
        • Q(c);N_GUARD::QAB(A)
        • Q(c);SBLOCK::R(E)+S(F),DCHECK
        • Q(c);::QAB1(A)
        • B(g);::QAB1(A)
      • Refutation
        • Q(c);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);XB(I)::QAR1(A)
        • P(e);P_SPINP(e),XS(F)::QAR1(A)
        • Q(c);::QAR1(A)
        • P(e);::QAR1(A),XP(e)
        • Q(c);::R(E)+S(F),DCHECK
        • B(g);::R(E)+S(F),DCHECK
      • Refutation
        • Q(c);
  • Actual
    • R(B);
    • Threat
      • R1(B)
    • Vars
      • P(a);OGATEB,XR(B)::QAB(A)
      • P(e);::R1(B),XP(e)
      • Q(c);N_GUARD::QAB(A)
      • Q(c);SBLOCK::R(E)+S(F),DCHECK
      • Q(c);N_GUARD::S(H)
      • B(g);N_GUARD::QAR1(A),XQ(c)
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