MESON Chess Problem Database

Problem Display
PID: 234101 (8/8/8/3n4/8/7Q/1nk5/KN2R3 w - - 0 1)

Dragoescu, Radu

5th Prize, Buletin Problemistic 03. Miniature Ty., 1988-1990

8/8/8/3n4/8/7Q/1nk5/KN2R3

#2

4 + 3

5454 Near Snap 2021
15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sc3
      • 2.Qxc3#
    • 1...Sb4
      • 2.Qc3#
    • 1...Sf4
      • 2.Qc3#
    • 1...Sb6
      • 2.Qc3#
    • 1...Sf6
      • 2.Qc3#
    • 1...Sc7
      • 2.Qc3#
    • 1...Se7
      • 2.Qc3#
  • Tries
    • 1.Re2+?
      • 1...Kd1
        • 2.Qf1#
      • 1...Kc1!
    • 1.Qg2+?
      • 1...Kd3
        • 2.Qe4#
      • 1...Kb3!
    • 1.Qf3?
      • 1...Sd1
        • 2.Qxd1#
      • 1...Sd3
        • 2.Qd1#
      • 1...Sc3
        • 2.Qxc3#
      • 1...Sa4
        • 2.Qd1#
      • 1...Sc4
        • 2.Qd1#
      • 1...Sb4
        • 2.Qc3#
      • 1...Sf4
        • 2.Qc3#
      • 1...Sb6
        • 2.Qc3#
      • 1...Sf6
        • 2.Qc3#
      • 1...Sc7
        • 2.Qc3#
      • 1...Se7
        • 2.Qc3#
      • 1...Se3!
  • Keys
    • 1.Qa3!
      • 1...Sc3
        • 2.Qxc3#
      • 1...Sd1
        • 2.Re2#
      • 1...Sd3
        • 2.Qa4#
      • 1...Sa4
        • 2.Rc1#
      • 1...Sc4
        • 2.Rc1#
      • 1...Se3
        • 2.Qc3#
      • 1...Sb4
        • 2.Qc3#
      • 1...Sf4
        • 2.Qc3#
      • 1...Sb6
        • 2.Qc3#
      • 1...Sf6
        • 2.Qc3#
      • 1...Sc7
        • 2.Qc3#
      • 1...Se7
        • 2.Qc3#

Anticipated by 132651(1957)

This anticipates 23880(1996)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(c);N_GUARD::QAR1(D),XS(c)
    • S(c);N_GUARD::QAR1(D)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR2(D)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB1(D)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(D);
      • Vars
        • S(a);N_GUARD::QAB1(D),XS(a)
        • S(a);N_GUARD::QAB1(D)
        • S(c);N_GUARD::QAR1(D),XS(c)
        • S(c);N_GUARD::QAR1(D)
      • Refutation
        • S(c);
  • Actual
    • Q(D);
    • Vars
      • S(c);N_GUARD::QAR1(D),XS(c)
      • S(a);SBLOCK::R(C)
      • S(a);N_GUARD,SBLOCK::QAB(D)
      • S(a);::R1(C)
      • S(c);N_GUARD::QAR1(D)
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